VEGASOURCE 81 Source Holder Instruction Manual

VEGASOURCE 81 Source Holder

Product Information: VEGASOURCE 81

The VEGASOURCE 81 is a source holder used in a specific application. This user manual provides detailed instructions on mounting, connection, setup, maintenance, fault rectification, part exchange, and user safety.

About this document

Function: This document serves as a comprehensive guide for the VEGASOURCE 81. It includes information on mounting, connection, setup, maintenance, and safety precautions.

Target group: The manual is intended for trained personnel who will be handling the VEGASOURCE 81. It is essential that qualified individuals have access to and follow the instructions outlined in this manual.

Symbols used: The manual uses specific symbols to indicate important information. These symbols include instructions for Ex applications, sequences of actions, and disposal instructions.

For your safety

Authorised personnel: Only trained and qualified personnel authorized by the plant operator should perform any operations described in this documentation. It is crucial to always wear the required personal protective equipment when working with the device.

Radiation protection: The handling of radioactive substances must comply with the radiation protection rules of the country where the system is operated. In Germany, the current radiation protection ordinance (StrlSchV) based on the Atomic Energy Law (AtG) applies.

Product Usage Instructions

Mounting
To mount the VEGASOURCE 81, follow these general instructions:

1. Read and understand the user manual completely before proceeding with the mounting process.
2. Refer to the specific mounting instructions provided in section 4.2 of the manual.

Installation – Special equipment
If you are using a specific version of the VEGASOURCE 81 with pneumatic switchover (Version B), follow the connection instructions provided in section 5.1 of the manual.
If you are using Version X, C, or B with manual switchover, refer to section 5.2 for the connection instructions.

Setup

The setup process may vary depending on the version of the VEGASOURCE 81 you are using:

• If you have Version X or C with manual switchover, follow the adjustment instructions in section 6.1.
• If you have Version B with pneumatic switchover, refer to section 6.2 for the adjustment instructions.

Dismount

If you need to dismount the VEGASOURCE 81, follow the steps provided in section 8.1 of the manual. For returning the device, refer to section 8.2 for further
instructions.

Operating Instructions VEGASOURCE 81
Source holder
Document ID: 66075

About this document

Function
This instruction provides all the information you need for mounting, connection and setup as well as important instructions for maintenance, fault rectification, the exchange of parts and the safety of the user. Please read this information before putting the instrument into operation and keep this manual accessible in the immediate vicinity of the device.

Target group
This operating instructions manual is directed to trained personnel. The contents of this manual must be made available to the qualified personnel and implemented.

Symbols used
Document ID This symbol on the front page of this instruction refers to the Document ID. By entering the Document ID on www.vega.com you will reach the document download. Information, note, tip: This symbol indicates helpful additional information and tips for successful work. Note: This symbol indicates notes to prevent failures, malfunctions, damage to devices or plants. Caution: Non-observance of the information marked with this symbol may result in personal injury. Warning: Non-observance of the information marked with this symbol may result in serious or fatal personal injury. Danger: Non- observance of the information marked with this symbol results in serious or fatal personal injury.
Ex applications This symbol indicates special instructions for Ex applications.
· List
The dot set in front indicates a list with no implied sequence. 1 Sequence of actions
Numbers set in front indicate successive steps in a procedure.
Disposal This symbol indicates special instructions for disposal.

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2 For your safety

Authorised personnel
All operations described in this documentation must be carried out only by trained, qualified personnel authorised by the plant operator.
During work on and with the device, the required personal protective equipment must always be worn.
The handling of radioactive substances is regulated by law. The radiation protection rules of the country in which the system is operated apply first and foremost.
In Germany the current radiation protection ordinance (StrlSchV) based on the Atomic Energy Law (AtG) is applicable.
The following points are important for measurement with radiometric methods:

Handling permit

A handling permit is required for operation of a system using gamma rays. This permit is issued by the respective state government or the responsible authority (offices for environmental protection, trade supervisory boards, etc.)
We would be pleased to assist you in applying for the permit.

General instructions for radiation protection

When handling radioactive sources, unnecessary radiation exposure must be avoided. An unavoidable radiation exposure must be kept as low as possible. Take note of the following three important measures:

1

2

3

Fig. 1: Measures for protection against radioactive radiation
1 Shielding 2 Time 3 Distance

Shielding: Provide good shielding between the source and yourself as well as all other persons. Special source containers as well as all materials with high density (e.g. lead, iron, concrete, etc.) provide effective shielding.
Time: Stay as short a time as possible in radiation exposed areas.
Distance: Your distance to the source should be as large as possible. The local dose rate of the radiation decreases in proportion to the square of the distance to the radiation source.

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For your safety

Radiation safety officer

The plant operator must appoint a radiation safety officer with the necessary expert knowledge. He is responsible for ensuring that the radiation protection ordinance is complied with and for implementing all radiation protection measures.
You can also find certified course providers on the homepage of the Federal Office for Radiation Protection: www.bfs.de.

Control area

Control areas are areas in which the local dose rate exceeds a certain value. Only persons who undergo official dose monitoring are allowed into these control areas. You can find the respectively valid limit values for control areas in the radiation protection ordinance.
We are at your disposal for further information concerning radiation protection and regulations in other countries.

Appropriate use
When in operating mode, the source container VEGASOURCE 81 described in this document contains a radiactive source for radiometric level, interface, switching and density measurement as well as mass flow detection. The source container shields the radiation off from the surroundings and only allows it to exit, practically unhindered, in the direction of measurement.
To ensure the shielding effect and exclude damage to the radioactive source, all instructions in this operating instructions manual and the legal radiation protection regulations must be observed during installation and operation.
Operational reliability is ensured only if the instrument is used properly. We are not liable for damages caused by improper use.
You can find detailed information about the area of application in chapter ” Product description”.

Warning about incorrect use
Inappropriate or incorrect use of this instrument can give rise to hazards, e.g. risk to persons through exposure to gamma radiation. Damage to property and persons or environmental contamination can result. Also, the protective characteristics of the instrument can be impaired.
Take note of the respective safety instructions.

General safety instructions
This is a state-of-the-art instrument complying with all prevailing regulations and directives. The instrument must only be operated in a technically flawless and reliable condition. The operator is responsible for the trouble-free operation of the instrument. When measuring aggressive or corrosive media that can cause a dangerous situation if the instrument malfunctions, the operator has to implement suitable measures to make sure the instrument is functioning properly.
During the entire duration of use, the user is obliged to determine the compliance of the necessary occupational safety measures with the

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2 For your safety
current valid rules and regulations and also take note of new regulations.
The safety instructions in this operating instructions manual, the national installation standards as well as the valid safety regulations and accident prevention rules must be observed by the user.
For safety and warranty reasons, any invasive work on the device beyond that described in the operating instructions manual may be carried out only by personnel authorised by the manufacturer. Arbitrary conversions or modifications are explicitly forbidden. For safety reasons, only the accessory specified by the manufacturer must be used.
To avoid any danger, the safety approval markings and safety tips on the device must also be observed.
2.5 Application reference
· Take note of the applicable regulations and national/international
standards.
· Take note of the radiation protection ordinance when using, storing
and working with the radiometric measuring system.
· Take note of the warning instructions and safety zones. · Install and operate the instrument according to the documentation
and the respective official regulations.
· The instrument must not be operated and stored outside the
specified parameters.
· Protect the instrument against extreme influences (e.g. chemi-
cal products, weather, mechanical shock, vibration, etc.) during operation and storage. Especially when loaded with a source, the instrument may not be destroyed for any reason (e.g. for scrapping).
· Before switching on the radiation, make sure that no persons are
in the radiation area (also not outside the vessel). The radiation must only be switched on by trained personnel.
· Do not use a corroded or damaged instrument. Inform the respon-
sible radiation safety officer as soon as damage or corrosion appears and follow his instructions.
· Carry out the necessary tightness test according to the applicable
rules and instructions.
· If there are doubts about the proper condition of the measuring
system, check if there is radiation in the environment of the instrument and inform the responsible radiation safety officer.
· Always secure the switch position OFF with a lock.
The combination lock can be opened with the number combination 000 on delivery.
We recommend changing the number combination to a personal number sequence. Make a note of the number combination and keep it in a safe place.

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2 For your safety

2.6 Installation and operation in the USA and Canada
This information is only valid for USA and Canada. Hence the following text is only available in the English language.
Installations in the US shall comply with the relevant requirements of the National Electrical Code (ANSI/NFPA 70).
Installations in Canada shall comply with the relevant requirements of the Canadian Electrical Code.
2.7 Environmental instructions
Protection of the environment is one of our most important duties. That is why we have introduced an environment management system with the goal of continuously improving company environmental protection. The environment management system is certified according to DIN EN ISO 14001.
Please help us fulfil this obligation by observing the environmental instructions in this manual:
· Chapter ” Packaging, transport and storage” · Chapter ” Disposal”

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Type label Versions

3 Product description
3 Product description
3.1 Configuration
The type labels contain the most important data for identification and use of the source holder and the source:
· Source holder · Order code · Serial number – Source holder · Exit angle · QR code · Article number – Documentation · Source · Isotope contained · Activity · Country of origin · Serial number – Source · Loading date
The serial number allows you to access the delivery data of the instrument via ” www.vega.com”, ” Instrument search (serial number)”.
There are several versions available with different options for opening or blocking the beam exit. Apart from the manual versions, there are also a version with pneumatic switchover.

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3 Product description
X B
C

Fig. 2: Versions VEGASOURCE 81 (Overview)
Version X: Standard version with manual changeover (lock for position: OFF) Version C: Standard version with manual changeover (lock for position: ON/OFF) Version B: with pneumatic switchover

Features of the versions

Manual switching Cover (optional) Padlock – ON Padlock – OFF Pneumatic switching With electrical ON/OFF position switch (optionally) With Interlock switch (optionally)

X Manually
­ ­

C Manually
­

Tab. 1: Features of the instrument versions

B Pneumatics
­ ­ ­ ­

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Version X, C

Product description

Fig. 3: Position of the type labels – e.g. version X, C – Manual switchover 1 Type label – Source holder 2 Type label – Source 3 Position indication OFF 4 Position indication ON
A

1
2 3 4
B 7 8 9
Fig. 4: Type label – e.g. version X, C – Manual switchover A Type label – Source B Type label – Source holder 1 Warning – Radioactivity 2 Source: Cs-137 3 Activity of the sources in MBq and mCi or GBq and mCi 4 Country of origin of the source 5 Loading date of the sources (MM/YYYY) 6 Serial number of the source capsule (for traceability of the source) 7 Order code – Source container 8 Serial number – Source holder 9 Beam exit angle 10 Manufacturer 11 QR code 12 Number of the corresponding operating instructions
VEGASOURCE 81 · Source holder

6 5 12 11 10
11

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3 Product description

General License

1

Fig. 5: Position of the additional type label “General License” (only for USA) 1 General License

Serial number – Instrument search
Scope of delivery

The type label contains the serial number of the instrument. With it you can find the following instrument data on our homepage:
· Product code (HTML) · Delivery date (HTML) · Order-specific instrument features (HTML) · Operating instructions and quick setup guide at the time of ship-
ment (PDF)
· Test certificate (PDF) – optional
Move to ” www.vega.com” and enter in the search field the serial number of your instrument.
Alternatively, you can access the data via your smartphone:
· Download the VEGA Tools app from the ” Apple App Store” or the
” Google Play Store”
· Scan the QR-code on the type label of the device or · Enter the serial number manually in the app
The scope of delivery typically consists of the following components.
· Source holder · Documentation
­ This operating instructions manual ­ Certificate of the source (source capsule) ­ If necessary, further certificates

Application area

3.2 Principle of operation
The VEGASOURCE 81 is a source holder for shielding radioactive sources Cs-137.
The radioactive source in the source container emits gamma rays. The VEGASOURCE 81 is mounted on the vessel or the pipeline directly opposite the sensor.
The source holder shields the environment against gamma radiation and protects the radioactive source from mechanical damage or

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3 Product description
chemical influences. In case of large measuring ranges (e.g. with high vessels) two or more source holders are used. The VEGASOURCE 81 consists of the components:
2
3 1

4

Fig. 6: Source holder VEGASOURCE 81
1 Source holder 2 Cover (optional) 3 Transport lug 4 Mounting surface

Functional principle Source

The rays emitted by the gamma source are damped when penetrating the medium. The sensor detecting the attenuated radiation on the opposite side of the vessel calculates the measured value from the intensity of the radiation.
Max. activity of the sources The following table states the max. activity of the sources. Productionrelated fluctuations of the radiation activity and tolerances of the measuring instruments are not taken into account.

Local dose rate

Country Distance m (in) Field (µSv/h) Max. activity

USA

Europe II Europe

0.3 m (1 ft) 1 m (3.3 ft) 0.3 m (1 ft)

50

3

3

20 mCi

10 mCi

1 mCi

Tab. 2: Local dose rate at standard distance

Caution: The max. permissible activity of the source can be further limited by a country-specific approval.

Packaging

3.3 Packaging, transport and storage
Your instrument was protected by packaging during transport. Its capacity to handle normal loads during transport is assured by a test based on ISO 4180.
The device packaging consists of wood. This material is environmentfriendly and recyclable. Dispose of the packaging material via specialised recycling companies.

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3 Product description Transport inspection Transport

For transport, the source holder is fixed to the bottom plate of a wooden transport box.
The delivery must be checked for completeness and possible transit damage immediately at receipt. Ascertained transit damage or concealed defects must be appropriately dealt with. A seal is located on the outside of the transport packaging indicating that the packaging was not opened. Check the condition of this seal and record the intactness.
Transport must be carried out in due consideration of the notes on the transport packaging. Nonobservance of these instructions can cause damage to the device. According to the IATA regulations, the source container serves adequately as type A packaging for the sources. For transport, the source holder is fixed on a transport board and protected by a wooden box. Dimensions of the transport packaging (L x W x H) in mm (in):
· 560 x 560 x 580 mm (22 x 22 x 23 in)
Warning: Check the hoisting equipment for sufficient lifting capacity, approx. 110 kg (244 lbs) Persons must never stand beneath the loads.
When transporting, proceed according to the following illustrations. We recommend using a lift truck or a fork truck for transport to the place of use.

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3 Product description
2
A
a 1
b 3
B
1

Fig. 7: Pallet transport of the type A packaging
A Transport with lift truck B Transport with fork truck 1 Source holder in wooden box 2 Safety latches 3 Fork truck or other lifting vehicle a Insert slotted screwdriver into the recess b Lever the slotted screwdriver forward to release the tension lock
For the removal of the source holder, we recommend the use of suitable lifting equipment such as lifting bands, crane hooks, etc.
Note: Additional equipment such as the ON/OFF position switches or a pneumatic switchover change the centre of gravity of the source holder.
When lifting the source holder from the transport box, secure it against tipping with a strap loop on the side.
See the following illustration.

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Product description

Crane transport

Fig. 8: Lifting of a source holder with pneumatic switchover
· Open the tension locks of the box lid with a large slotted screw-
driver as shown in the illustration.
· Remove the box lid and take loose accessories out of the box. · Open the tension locks on the side walls of the box with a large
slotted screwdriver
· Remove the side walls of the box down to the base plate · Guide the lifting bands through the ring eyelets on the side of the
source holder
· Remove the transport screw connections to the base plate · Slowly lift the source holder upwards from the bottom plate using
the lifting bands.
Use the lug of the source holder for transport on a crane hook.

1

Fig. 9: Crane transport of the source holder 1 Lug

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Storage
Storage and transport temperature Lifting and carrying Transport regulations

3 Product description
Up to the time of installation, the packages must be left closed and stored according to the orientation and storage markings on the outside.
Unless otherwise indicated, the packages must be stored only under the following conditions:
· Not in the open · Dry and dust free · Not exposed to corrosive media · Protected against solar radiation · Avoiding mechanical shock and vibration · Ambient temperature for storage and transport see chapter ” Sup-
plement – Technical data – Ambient conditions”
· Relative moisture 20 … 85 %
With instrument weights of more than 18 kg (39.68 lbs) suitable and approved equipment must be used for lifting and carrying.
3.4 Shipment
Radioactive sources are subject to strict regulations. Therefore, when shipping the sources, we are bound to the respective regulations of the country where they will be used.
Germany We are only allowed to ship radioactive sources when we have a copy of the handling permit in hand. We can assist you with the procurement of the necessary documents. If you need help, contact our responsible sales organisation.
For safety reasons and to save costs, we always ship the source holder with the source installed. If the operator needs the source holder in advance, the source has to be shipped separately at a later time. In such cases, the source is shipped in a transport drum.
Other countries We are only allowed to ship radioactive sources when we have a copy of the import license in hand. We can assist you with the procurement of the necessary documents. If you need help, contact our responsible sales organisation.
We can only ship to foreign countries when the radioactive source is mounted in the source holder.
During shipment, the source holder is in switch position OFF. This position is secured by a lock.
Transport of the loaded source holder is carried out by a company authorized by us, with official approval for such transports. The transport is carried out in a type A packaging (source holder) in compliance with the European and international convention on the transport of dangerous goods (ADR and DGR/IATA regulations).

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3 Product description Mounting accessories Protective cap

3.5 Accessories
Brackets and special mounting accessories are available for mounting the VEGASOURCE 81. For mounting on pipelines, there are corresponding clamp brackets. Contact our sales staff.
To protect the switching mechanism of the VEGASOURCE 81 from dirt or contamination, a metallic protective cap is available. This also allows the padlock to be permanently protected from dirt, moisture and corrosion. The protective cap can only be used on the devices with manual switchover. The protective cap is available as an accessory and can also be retrofitted.

Gamma modulator

Fig. 10: Protective cap (optional) to protect against dirt and corrosion
In order to exclude external interference radiation, you can mount a gamma modulator in front of the source holder. This allows reliable measurement even when interference radiation occurs.

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Set of labels

Fig. 11: Gamma modulator (optional) for uninterrupted measurement even with interference radiation 1 Gamma modulator (mounted on the source holder)
For ambient temperatures up to 120 °C (248 °C) the gamma modulator is optionally available with water cooling. Any number of devices can be synchronized. To synchronize several gamma modulators, you need a controller.
There is a special label set for the source holder which can be ordered as a spare part.

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4 Mounting General information
Moisture

4 Mounting
4.1 General instructions
· For mounting of VEGASOURCE 81 you need a special handling
permit.
· Mounting may only be carried out by authorized, qualified person-
nel who are monitored for radiation exposure according to local laws or the handling permit. Take note of the specifications in the handling permit. Also take the local conditions into account.
· Carry out all work within the shortest possible time and at the larg-
est possible distance. Provide suitable shielding
· Avoid risk to other persons by taking suitable measures (e.g.
safety fence, etc.)
· All mounting and dismounting work must only carried out with the
switch in position OFF, secured with a lock.
· When mounting, take the weight of the source holder into account.
The device weight can be found in chapter ” Technical data”.
· Depending on the version, the centre of gravity of VEGASOURCE
81 can vary. Keep this in mind during crane transport on the lug
Mounting with a crane
Warning: Check the hoisting equipment for sufficient lifting capacity, approx. 110 kg (244 lbs).
Persons must never stand beneath the loads.
The source holder is screwed onto a transport board. Loosen the screws and lift the source holder from the transport board. For this purpose you have to use the lug of the source holder.
Use a suitable lifting tackle (shackle, snap hook, etc.) to fasten the source holder to the crane hook. Keep in mind that the source holder will tilt sidewards while lifting.
Versions with manual switchover Protect the source holder against moisture and hence against corrosion. If the source holder is exposed directly to the elements, you should cover it with a roof or a suitable protective bonnet.
If you expect heavy soiling or dust on the source holder, use the optional protective cap.
Version with position switches Use the recommended cables (see chapter ” Connecting to power supply”) and tighten the cable gland.
You can give your instrument additional protection against moisture penetration by leading the connection cable downward in front of the cable gland. Rain and condensation water can thus drain off. This applies mainly to outdoor mounting as well as installation in areas where high humidity is expected (e.g. through cleaning processes) or on cooled or heated vessels.

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4 Mounting

Version with pneumatic switchover The pneumatic actuator must not be used under ambient conditions that can cause corrosion in and on the pneumatic actuator.

Orientation – Level measurement

4.2 Mounting instructions
For continuous level measurement the source holder must be mounted slightly above or at the height of the max. level. The radiation must be directed exactly towards the detector mounted on the opposite side.
The source holder VEGASOURCE should be mounted as close as possible to the vessel.
However, with large measuring ranges and small vessel diameters, a gap can often not be avoided.
If there are gaps or empty spaces around the installation, provide protective fences or grids to keep hands away from the dangerous area. Such areas must be marked accordingly.

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30° 45°

Fig. 12: Orientation – Source holder Beam angle 30° and 45°

Orientation – Limit level measurement

For level detection, the version of the source container with an exit angle of a = 5° is suitable. The radiation must be directed exactly towards the detector mounted on the opposite side.
If you want to use larger exit angles (40° or 60°), you have to make sure the beam is horizontal. To do this you have to mount the source container so that the lugs are in a horizontal position.
The source holder VEGASOURCE should be mounted as close as possible to the vessel.

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4 Mounting

However, with large measuring ranges and small vessel diameters, a gap can often not be avoided.
If there are gaps or empty spaces around the installation, provide protective fences or grids to keep hands away from the dangerous area. Such areas must be marked accordingly.

5°

3
2
1
Fig. 13: Installation positions – Point level detection with MINITRAC 31 1 Horizontal mounting 2 Vertical mounting 3 Mounting horizontally, at right angles to container For reliable point level detection over the entire vessel diameter, a correspondingly long level sensor can also be used. In the case of bulk solids, the reaching of a limit level on a large container crosssection can be reliably detected. To do this, select the largest possible beam exit angle and mount the source holder rotated by 90°.

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4 Mounting

Fig. 14: Point Level detection with SOLITRAC 31

Orientation – Density measurement

The optimum and most constant conditions for density measurement in pipes can be achieved if you mount the measuring equipment on vertical pipelines or conveyors. The radiation must be oriented directly towards the detector mounted on the opposite side.
To extend the distance the beam travels through the medium and thus achieve a better measuring effect, the tube can be radiated diagonally or a measuring track can be used.
You can find the required mounting accessories in chapter ” Technical data”.
The source holder VEGASOURCE should be mounted as close as possible to the vessel.
However, with large measuring ranges and small vessel diameters, a gap can often not be avoided.
If there are gaps or empty spaces around the installation, provide protective fences or grids to keep hands away from the dangerous area. Such areas must be marked accordingly.
The ideal measurement setup for density measurement is installation on a vertical pipeline. The pipe diameter can be 50 … 100 mm (1.97 … 3.94 in). Flow direction should be from bottom to top.
Mounting brackets, angled attachments as well as mounting clamps are available for mounting.
Vertical pipeline, 30° inclined, diameter 50 … 100 mm (1.97 … 3.94 in) For pipeline diameters 50 … 100 mm (1.97 … 3.94 in), a diagonal radiation path is recommended. The distance of the beam through the medium is thus longer and an improved measuring effect is achieved. For this, the optional lead shielding for the detector is recommended in order to avoid influence from secondary radiation sources.

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4 Mounting
Fig. 15: 30° measurement setup on a pipeline with diameter 50 … 100 mm (1.97 … 3.94 in) Vertical pipeline, diameter 50 … 420 mm (1.97 … 16.54 in) For pipeline diameters 50 … 420 mm (1.97 … 16.54 in), a straight radiation path is possible. The radiometric sensor can be mounted either horizontally or vertically.

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4 Mounting
1
2 3 4
Fig. 16: Measurement setup on a pipeline with a diameter of 50 … 420 mm (1.97 … 16.54 in), detector mounting vertical 1 Source holder (VEGASOURCE) 2 Radiometric sensor (MINITRAC) 3 Radiated area 4 Mounting bracket Avoiding stray radiation – Vertical pipeline, diameter 50 … 420 mm (1.97 … 16.54 in) When mounting the radiometric sensor horizontally, the optional lead shielding is recommended in order to avoid influence from secondary radiation sources.

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4 Mounting

1
2
3 4
Fig. 17: Measurement setup on a pipeline with a diameter of 50 … 420 mm (1.97 … 16.54 in), detector mounting horizontal 1 Source holder (VEGASOURCE) 2 Radiometric sensor (MINITRAC) 3 Radiated area 4 Mounting bracket Horizontal pipeline On a horizontal pipeline, the radiation should be directed horizontally to avoid interference from air pockets.

1

3 2

Fig. 18: Measurement setup on a horizontal pipeline
1 Source holder (VEGASOURCE) 2 Radiated area 3 Detector (MINITRAC)

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Screw locking device

4 Mounting

The source holder must be integrated in the potential equalization of the system.
To ensure a good electrical contact between the source holder and the mounting bracket, the lock washers must be used according to the following illustration.
Use the prescribed torque for the mounting screws. Make sure that the screws have electrical contact to the potential equalization.

Material Strength class

Stainless 70 steel

Steel

8.8

Torque 50 … 140 Nm
50 … 140 Nm

Friction coefficient 1.4
1.4

1

Cover (optional)

Fig. 19: Lock washers (customer side) as screw locking device and conductive connection to potential equalization 1 Lock washers (2 pieces)
To protect the switching mechanism of the VEGASOURCE 81 from dirt or contamination, a metallic protective cap is available. This also allows the padlock to be permanently protected from dirt, moisture and corrosion. The protective cap can only be used on the devices with manual switchover. 1. Put on protective cap
Turn the protective cap 180° if it does not fit correctly. 2. Turn the protective cap clockwise until the straps are below the
fastening screws. 3. Tighten the fixing screws manually

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4 Mounting
2

3

1

Installation control 28

Fig. 20: Putting on the protective cap 1 Put on protective cap 2 Turn the straps of the protective cap under the fastening screws 2 Tighten fixing screws
The switching status of the source holder can also be seen when the protective cap is in place. Due to the special design, the lid can only be put on in such a way that the visible indication plate on the source holder shows the current switching status.
Measurement of the local dose rate After mounting, i.e. as soon as the radioactive emitter is mounted in the source holder, the local dose rate in the area of the source holder and the detector must be measured in µSv/h.
Caution: Depending on the respective installation, radiation can also leak out of the beam exit channel due to scattering. Such stray radiation must be shielded off with additional lead or steel sheets. All control and offlimit areas must be rendered inaccessible and provided with warning signs.
Behaviour with empty vessel Caution: After technically correct mounting, the control area around an empty vessel must be measured for radioactivity and if there is any, the area must be cordoned off and marked. Possible ways of access to the inside of the vessel must be reliably closed off and marked with a warning sign “Radioactive”. The responsible radiation safety officer can allow access after having checked the safety measures with switched-off source holder. If work must be carried out in and on the vessel, it is absolutely necessary to switch off the radiation on the source holder.
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Safety instructions Potential equalisation Connection cable Electrical connection

5 Installation – Special equipment
5 Installation – Special equipment
5.1 Version B: Connection – Pneumatic switchover
5.1.1 Connection of the ON/OFF position switches These instructions apply to source holders VEGASOURCE 81 Versions B with pneumatic switchover. The ON/OFF position switches signal the switching status of the source holder. We recommend connecting ON/OFF position switches. They give reliable feedback, indicating if the switchover has really reacted to the pneumatic switching impulse.
Always keep in mind the following safety instructions:
· Connect only in the complete absence of line voltage · If overvoltage surges are expected, overvoltage arresters should
be installed
The ON/OFF position switches are already mounting and connected in the terminal housing to the terminals. Connect the ON/OFF position switches according to the following diagrams. Take note of the general installation regulations. As a rule, connect VEGASOURCE 81 to vessel ground (PA), or in case of plastic vessels, to the next ground potential. The data for power supply are specified in chapter ” Technical data”.
The instrument is connected with standard two-wire cable without shielding. Use cable with round cross-section. A cable outer diameter of 5 … 10 mm (0.2 … 0.39 in) ensures the seal effect of the cable gland. If you are using cable with a different diameter or cross-section, exchange the seal or use a suitable cable gland.
Connect the ON/OFF position switches as shown in the figure below.

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VEGASOURCE 81 · Source holder

29

5 Installation – Special equipment

1

br

1+

bl

2-

br

3+

bl

4-

2

Fig. 21: Connection terminal housing of the ON/OFF position switch
1 ON/OFF position switch for switch position EIN – ON (terminals 1 and 2) 2 ON/OFF position switch for switch position AUS – OFF (terminals 3 and 4)

Switching amplifier

For signal processing you need a NAMUR switching amplifier. We recommend the double channel switching amplifier VEGATOR 112.
5.1.2 Compressed air connection These instructions apply to source holders VEGASOURCE 81 Versions B with pneumatic switchover.
Note: The pneumatic switchover may only be put into operation after the source holder is mounted.

Connection of the pneu- The compressed air line is connected to the free ¾” thread (7). matic lines

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30

VEGASOURCE 81 · Source holder

5 Installation – Special equipment

9

8

1 2

7

6

3

4 5
Fig. 22: Connection of the pneumatic lines on VEGASOURCE 81 – version B 1 Ventilation filter/Sound absorber 2 Voltage supply 3 Voltage supply 4 Terminal housing for connection of the ON/OFF position switches 5 ON/OFF position switch for switch position AUS – OFF (terminals 3 and 4) 6 ON/OFF position switch for switch position EIN – ON (terminals 1 and 2) 7 ¾” thread for connection of the compressed air 8 Adjusting screw – switching speed switch-on operation 9 Adjusting screw – switching speed switch-off operation
Use an electrical switching valve in the pneumatic line (e.g. Festo CPE). With this, you can switch off the air supply.
Optionally you can install an additional hand-operated switching valve (e.g. Festo VHEM) in the pneumatic line. In emergencies you can then interrupt the pneumatic air supply on site and switch off the source holder. Mount this hand-operated switching valve in a safe position outside the radiated area.
5.2 Version X, C, B: Connection – Manual switchover
5.2.1 Connection of the ON/OFF position switches
These instructions apply to source holder VEGASOURCE 81 version X, C with electrical ON/OFF position switches.
The ON/OFF position switches signal the switching position of the source holder. We recommend connecting the ON/OFF position switches. They provide reliable feedback on the condition of the source holder.

VEGASOURCE 81 · Source holder

31

66075-EN-220701

5 Installation – Special equipment

Safety instructions

Always keep in mind the following safety instructions:
· Connect only in the complete absence of line voltage · If overvoltage surges are expected, overvoltage arresters should
be installed
· Only for use in non-hazardous areas

Connection cable

The instrument is connected with standard two-wire cable without shielding.
Use cable with round cross-section. A cable outer diameter of 5 … 10 mm (0.2 … 0.39 in) ensures the seal effect of the cable gland. If you are using cable with a different diameter or cross-section, exchange the seal or use a suitable cable gland.

Electrical connection

The ON/OFF position switches are already mounting and connected in the terminal housing to the terminals.
Connect the ON/OFF position switches according to the following diagrams. Take note of the general installation regulations. As a rule, connect VEGASOURCE 81 to vessel ground (PA), or in case of plastic vessels, to the next ground potential.
The data for power supply are specified in chapter ” Technical data”.

1

br

1+

bl

2-

br

3+

bl

4-

2

Fig. 23: Connection terminal housing of the ON/OFF position switch
1 ON/OFF position switch for switch position EIN – ON (terminals 1 and 2) 2 ON/OFF position switch for switch position AUS – OFF (terminals 3 and 4)

Switching amplifier

For signal processing you need a NAMUR switching amplifier. We recommend the double channel switching amplifier VEGATOR 112.

66075-EN-220701

32

VEGASOURCE 81 · Source holder

6 Setup
6 Setup
6.1 Adjustment – Version X, C – Manual switchover
Warning: Before switching on the radiation, make sure that no persons are inside the radiated areas (also not inside the vessel). Radiation must only be switched on by trained personnel.
Switching the radiation The figures in brackets refer to the following illustration. on

1

2

3

4

Fig. 24: Switching the radiation on – VEGASOURCE 81 version X, C 1 Loosen safety screw 2 Fold up the safety screw 3 Turn stirrup by 180° 4 Fold up and tighten safety screw.
1. Initial situation: Source holder is in position OFF 2. Open and remove padlock
Note: The combination lock can be opened with the number combination 000 on delivery. We recommend changing the number combination to a personal number sequence. Make a note of the number combination and keep it in a safe place.
3. Loosen safety screw (1) 4. Fold up the safety screw (2) 5. Turn the stirrup clockwise by 180° (3)

VEGASOURCE 81 · Source holder

33

66075-EN-220701

6 Setup

6. Fold up and tighten safety screw (4)
7. Fasten the padlock in the specified position on the stirrup until it is required again
8. Put on the protective cap (optional), if available
Note: The current switching status is indicated by the narrow-shaped arrow of the stirrup. The arrow of the stirrup points in the direction of the sign EIN – ON.

Indication of the switch- Radiation ON

ing status

The marking arrow of the stirrup points to EIN – ON.

Fig. 25: Radiation ON – VEGASOURCE 81 Version X, C
Radiation OFF The marking arrow of the stirrup points to AUS – OFF

Fig. 26: Radiation OFF – VEGASOURCE 81 Version X, C

Switching the radiation off
Position indication with protective cap

Switching off the radiation is analogous to this procedure. To switch off the radiation, turn the stirrup 180° anticlockwise.
If a protective cap (optional) is fitted, then the protective cap cannot be placed on the source holder in any position. The strap of the protective cap only shows the respective switching position. If the protective cap cannot be put on in a certain position, turn the protective cap 180°.

34

VEGASOURCE 81 · Source holder

66075-EN-220701

6 Setup

1

2

Fig. 27: Position indication with protective cap – VEGASOURCE 81 Version X, C 1 Radiation OFF 2 Radiation ON
Version X With version X, the protective cap can be secured with a padlock in OFF position Version C With version C, the protective cap can be secured with a padlock in OFF or ON position
6.2 Adjustment – Version B – Pneumatic switchover
Warning: Before switching on the radiation, make sure that no persons are inside the radiated areas (also not inside the vessel). Radiation must only be switched on by trained personnel.
Note: The pneumatic actuator must not be used under ambient conditions that can cause corrosion in and on the pneumatic actuator.

Switching the radiation on

Initial situation: Pneumatic switchover is connected correctly. You can find the required pressure values under ” Technical data” in the annex.
The source holder is in AUS-OFF position.

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VEGASOURCE 81 · Source holder

35

6 Setup

1

2

Fig. 28: Indication of the switching status with VEGASOURCE 81 – Version B – Pneumatic switchover 1 Switching status AUS/OFF (symbol: closed padlock) 2 Switching status EIN/ON (symbol: open padlock)
· Remove padlock
Note: The combination lock can be opened with the number combination 000 on delivery. We recommend changing the number combination to a personal number sequence. Make a note of the number combination and keep it in a safe place.
Note: The padlock must only be fitted again for inspection purposes (OFF position) and should be stored in a suitable place or outside the plant until then. Do not hang the padlock during operation in the opening of the OFF switching position, because otherwise the pneumatic switchover cannot switch to the end position.
· The pneumatic switchover can now be operated
Warning: Do not touch the operating lever when the drive is pressurized.

Indication of the switch- Radiation ON

ing status

The operating lever is at the switching symbol EIN/ON (open padlock)

36

VEGASOURCE 81 · Source holder

66075-EN-220701

Switching the radiation off

6 Setup
Radiation OFF The operating lever is at the switching symbol AUS/OFF (closed padlock)
Analogue to this procedure, the radiation is switched off via the compressed air controls. When the pneumatic switchover is unpressurized, the VEGASOURCE 81 switches back automatically to switch position OFF.

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VEGASOURCE 81 · Source holder

37

7 Maintenance and fault rectification
7 Maintenance and fault rectification
7.1 Cleaning
Clean the instrument in regular intervals. Note the following points:
· Clean the instrument of substances that can impair the safety
function
· Remove deposits of medium or other substances that could impair
or prevent the source holder from switching over
· Take care that the lettering remains legible · Clean the adhesive labels and the connection box (version with
pneumatic switchover) only with water (e.g. with slightly damp rag)
· Avoid creating electrostatic charges on the instrument. Never rub
with dry cloth when cleaning
Warning: Take note of all safety instructions in this operating instructions manual when cleaning.

Inspection

7.2 Maintenance
If the device is used properly, no special maintenance is required in normal operation.
Along with the regular inspections of the system, we recommend the following checks:
· Visual check for corrosion on the housing, the weld joints, the
outer parts of the source insert, the lock, the lock washers
· Test of the mobility of the source insert (switching on and off func-
tion)
· Assessment of the legibility of all labels and warning signs · Stability and firm attachment of the source holder
Caution: If you are not sure of the proper functioning or condition of the instrument, contact immediately the responsible radiation safety officer for further instructions.
Caution: Repairs or maintenance work beyond the scope of the usual inspection may only be carried out by the manufacturer, the supplier or specially authorized persons.

66075-EN-220701

Measures in case of corrosion

If there are clear traces of corrosion on the source container, the local dose rate (µSv/h) must be measured in the surroundings. If the rate is clearly above the values during normal operation, then the area must be cordoned off and the responsible radiation safety officer informed.
Corroded instruments and lock washers must be exchanged as soon as possible.
Warning: Source containers with corroded locking device or source insert must be replaced immediately.

38

VEGASOURCE 81 · Source holder

Function test
Measure the local dose rate

7 Maintenance and fault rectification
7.3 Test of the switchover
Test the function of the switchover on the source holder at regular intervals.
Source holder with manual switchover 1. Loosen the locking screw (version X and C) and remove the lock
(if present) as described in chapter ” Setup”.
2. Move the source insert as described in chapter ” Setup” several times from the ON to the OFF position and vice versa. The source insert should be easily movable and must have no traces of corrosion in the visible area.
If the source insert cannot be moved from ON to OFF position, follow the instructions in paragraph ” What to do in case of emergency”.
If it is hard to move the source insert or if there are other signs of a malfunction, the source insert must be locked in position OFF and the responsible radiation safety officer informed. In case of corrosion: Follow the instructions in chapter ” Maintenance/Measures in case of corrosion”.
Source holder with pneumatic switchover 1. Remove the padlock (see chapter ” Setup”)
2. Switch the source insert by means of compressed air from the position OFF to position ON. The source insert should move without interruption to position “ON”.
Caution: Do not grasp into the display window of the indication plate while the pneumatic actuator is switching over.
3. Reduce the pressure to below 2.5 bar (36 psi). The source insert must move back to position OFF.
If the source insert does not move smoothly or shows signs of a possible malfunction, the source insert must be locked in position OFF and the responsible radiation safety officer informed. If the source insert cannot be moved from ON to OFF position, follow the instructions in paragraph ” What to do in case of emergency”.
In case of corrosion: Follow the instructions in chapter ” Maintenance/Measures in case of corrosion”.
Measure the local dose rate of the source holder at regular intervals and document the measurement results.
The measurement data allow conclusions to be drawn about leaks and possible changes in radiation power.

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VEGASOURCE 81 · Source holder

39

7 Maintenance and fault rectification
5

3 r

2 1

4

Fig. 29: Measuring points for the measurement of the local dose rate
r Distance to the source holder 1-5 Measuring points

Always use the same distance (r) from the source holder to the measuring points.
Document the measurement results.

Date of the measurement Time of the measurement
Measuring distance r
Value of the last measurement (µSv)

dd/mm/yyyy hh:mm
Measuring point Measured value (µSv)
1 2 3 4 5

Tab. 4: Measurement protocol for the local dose rate

7.4 Tightness test
The tightness of the source capsule must be checked at regular intervals. The frequency of the tightness test (wipe test) must correspond to the specifications of the authorities or the handling permit.
Note: A tightness test is not only required as a regular test but must be carried out after each incident that could impair the shielding of the source. In such case, the tightness test must be prescribed by the responsible radiation safety officer under consideration of the applicable regulations and comprise, apart from the source holder itself, all other affected parts of the process vessel.
The tightness test must be carried out immediately after an incident.

40

VEGASOURCE 81 · Source holder

66075-EN-220701

Sequence of the tightness test

7 Maintenance and fault rectification
The tightness test described below is specified:
· For regular testing during operation · For when the source holder is stored for longer periods · For when the source container is put into operation after a longer
storage period
The tightness test (also wipe test) must be carried out by an authorized person or organisation with a wipe test kit provided by an authorised organisation. Wipe test kits must be used according to the instructions of the manufacturer. Reports on the test results must be kept. If no other instructions are specified, carry out the tightness test as follows:

Fig. 30: Wiping surfaces for the tightness test – Version X, C
1. Take wipe samples from at least the following locations: Version X, C – Manual changeover: Along the groove between the source insert and the housing Version B – Pneumatic switching: Along the thread of the ON-OFF position switches and the three ring-shaped grooves on the cylinder housing With manually operated source holders, the tightness test can be carried out when the source holder is in position ” ON” or ” OFF”. With source holders with pneumatic switchover, the switch must be fixed with the lock in position OFF before starting the tightness test.
2. Have the samples analyzed by an authorized organisation. A radiation source is judged to be leaky if more than 185 Bq (5 nCi) are detected in the sample of the tightness test.
Note: The specified value is valid for the USA. National regulations of other countries may prescribe other limit values.
If the source is possibly leaky, carry out the following steps:
· Inform the radiation safety officer

VEGASOURCE 81 · Source holder

41

66075-EN-220701

7 Maintenance and fault rectification
· Take suitable measures to avoid contamination of the environment
by the source. Secure the source.
· Inform the responsible authority that a leaky source was detected.

7.5 Rectify faults

Reaction when malfunction occurs

The operator of the system is responsible for taking suitable measures to rectify faults.
The radiation safety officer is responsible for all matters having to do with radiation protection, especially ensuring that the radiation protection ordinance is observed, and can prescribe appropriate measures if problems or malfunctions occur.

24 hour service hotline

For help with urgent technical problems, call the VEGA service hotline number +49 1805 858550. The hotline is manned 7 days a week round-the-clock. Since we offer this service worldwide, the support is only available in the English language. The service is free, only standard call charges are incurred.
Telephone hotline USA A special telephone hotline is available for the USA:
1-800-367-5383
Outside normal working hours, please leave a message on the answering machine.
The engineer on duty will call you back.

Immediate measures

7.6 What to do in case of emergency
The emergency procedure described here must be applied immediately in the interest of the safety of the staff, in order to secure an area in which an unshielded radiation source exists or is assumed to exist.
An emergency situation exists if a radioactive source is no longer inside the source holder, if the source holder cannot be switched to “OFF” position or if an increased local dose rate has been detected in the proximity of the source holder.
The emergency procedure protects the affected persons until the responsible radiation safety officer arrives and prescribes further measures.
The person charged with the supervision of the radiation source (i.e. the person stipulated and authorized by the plant operator) is responsible for implementing this procedure.
· Determine the dangerous area on site by measuring the local dose
rate in µSv/h
· Generously cordon off the affected area with yellow marking tape
or rope and mark the area with the international radiation warning symbol

The source holder cannot In this case, the source holder must be dismounted. The radiation be brought into position safety officer has to prescribe dismounting. “OFF”

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42

VEGASOURCE 81 · Source holder

7 Maintenance and fault rectification

Direct the exit channel towards a thick wall (e.g. of steel or lead) or mount a blind flange or blind plate in front of the exit channel.
Persons may only stand behind the source holder. Never stay in front of the radiation exit channel (flange or mounting surface of VEGASOURCE 81).
The transport lug on the housing facilitates safe handling.

The source is no longer In this case, the source must be kept secure in another place or an

in the source holder

additional shielding must be provided.

The radiation source may only be transported with tongs or a gripper as well shielded as possible and must be kept as far away from the body as possible.

The time required for transport should be estimated and optimized in advance through tests and training.

Informing the responsible · Pass all necessary information immediately on to the responsible

authority

local and national authorities

· After a thorough investigation of the situation on site, the respon-

sible radiation safety officer must agree, together with the local

authorities, on appropriate corrective measures for the existing

problem

Note: National regulations can prescribe deviating procedures and notification requirements.

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VEGASOURCE 81 · Source holder

43

8 Dismount 44

8 Dismount
8.1 Dismounting steps
As soon as a radiometric measuring system is no longer required, the radiation must be switched off on the source holder (position “OFF”). The source holder must be dismounted under consideration of all relevant regulations and stored in a lockable room without through traffic. Inform the responsible authorities of this measure. The access area for this storage room must be measured (µSv/h) and marked. The radiation safety officer is responsible for implementing anti-theft measures. Care must be taken that the source in the source holder is not scrapped together with the rest of the system. Arrange for a return shipment as soon as possible.
Caution: Dismounting may only be carried out by authorized, qualified personnel who are monitored for radiation exposure according to local laws or the handling permit. Take note of the specifications in the existing handling permit. All local conditions must be taken into account. All work must be carried out in the shortest possible time and at the largest possible distance (shielding). Also, the endangering of other persons must be avoided through suitable measures (e.g. safety fence, etc.). The source holder may only be dismounted when the radiation is switched off. Make sure that the switch position OFF is secured by a lock.
Note chapters ” Mounting” and ” Setup” for dismounting and carry out the described steps in reverse order.
8.2 Return
Federal Republic of Germany Contact the responsible sales engineer to arrange for a return, to check on the possibility of reuse or disposal.
Other countries Contact the responsible sales partner to arrange for a return, to check on the possibility of reuse or disposal. Also inform the relevant authority. If a return in your country is not possible, contact the respective sales partner to decide on further action. The destination airport for a possible return shipment is Frankfurt a. M., Germany.
VEGASOURCE 81 · Source holder

66075-EN-220701

8 Dismount
Note: Take pictures of the condition of the source holder for documentation purposes. This is recommended if the source holder or parts of it are corroded or damaged.
Conditions for a return shipment The following conditions must be fulfilled before a return shipment:
· An inspection certificate not older than six months confirming the
tightness of the source (wipe test certificate) must be available for a return.
· Keep specifications on the serial number of the source capsule,
the type of source and the activity or type of source ready. These data are available in the documents supplied along with the source. Enclose a copy of the manufacturer’s certificate of the source.
· No significant traces of corrosion on the source holder which could
endanger the function or safe storage of the source.
· No serious damage due to fire or mechanical influences (deforma-
tions, dents, etc.)
· The switching mechanism of the source holder functions perfectly.
Set the source holder to “OFF” and secure this position with a lock.
· The return shipment must be made in a type-tested type A
packaging in accordance with IATA rules. The source holder VEGASOURCE 81 is suitable for return shipment. In case of doubt, your sales partner will provide you with suitable transport packaging.
· Label the package in accordance with the applicable IATA regula-
tions and probable deviating national regulations. If necessary, carry out further control measurements in accordance with national and international regulations.
In case of doubt, talk to your relevant authority or an appropriately competent institution.

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VEGASOURCE 81 · Source holder

45

9 Supplement
9 Supplement

9.1 Technical data

General data

Material 316L corresponds to 1.4404 or 1.4435

Instrument weight

With manual switching

approx. 10.7 kg (23.5 lbs)

With pneumatic switching

max. 19.5 kg (43 lbs)

Protective cap

approx. 0.9 kg (2 lbs)

Process fitting

See figure under ” Dimensions”

Torque – Mounting screws

Material

Strength class

Stainless steel 7

Steel

8.8

Torque 50 … 140 Nm 50 … 140 Nm

Friction coefficient > 1.4

Beam exit channel Position
Exit angle
Width Attenuation of the useful beam Materials Process fitting – Mounting surface Outer housing
Tightness of the source insert Shielding material Source holder Manual switching Pneumatic switching

Centre of the mounting surface It has the same direction as the transport lugs. The position of the exit channel is marked with an arrow on the mounting surface. 5°, 30°, 40° (± 20°), 45°, 60° (± 30°) Details see illustration exit angle under “Dimensions” in the annex 10° approx. 0.3 half value layers (FS = 1.2)
316L 316L or steel (1.0619) with PUR textured paint RAL 1018 Silicone Lead 316L 316L 316L

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46

VEGASOURCE 81 · Source holder

Materials – Device version X, C – Manual switchover

14

X

1

C

13

2

12

3

11

4

10

5

9

6

8

7

Fig. 31: Materials VEGASOURCE 81 – Version X, C

Position 1 2 3 4 5 6 7 8 9 10 11 12 13 14

Component Locking screw Collar screw Rotary handle Closing plate Label – ON/OFF Safety screw – Torx with pin Rivet Type label – Source holder Type label – Source Source holder Label Padlock – Numerical code Spring ring Eye- bolt

Material 316L 316L 1.4408 (CF8M) 1.4408 (CF8M) 316L 316L 316L 316L 316L 316L oder 1.0619 Polyester Steel 1.4568 (17-7PH) 316L

9 Supplement

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VEGASOURCE 81 · Source holder

47

9 Supplement

Materials – Device version X, C – Manual switchover with ON/OFF position switches

14

1

13

2

3 12

4 11

5 10

6 9

7 8
Fig. 32: Materials VEGASOURCE 81 – Version X, C – with ON/OFF position switches

Position 1 2 3
4 5 6 7 8 9 10 11 12 13
14 15

Component

Material

Locking screw

316L

Collar screw

316L

Safety screw – Torx with pin

316L

Closing plate

1.4408 (CF8M)

Rotary handle

1.4408 (CF8M)

Label – ON/OFF

316L

Optional label

316L

Type label – Source holder

316L

Source holder

316L oder 1.0619

Rivet

316L

Type label – Source

316L

Cable gland

PA

ON/OFF position switch – Lid

Aluminium, powder-coated

ON/OFF position switch – Connection hous- Aluminium, powder-coated ing

Spring ring

1.4568 (17-7PH)

Eye-bolt

316L

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48

VEGASOURCE 81 · Source holder

Materials – Device version X, C – Manual switchover with interlock switch

15

1

2 14

13

3

12

4

11

5

10

9

6

8

7

Fig. 33: Materials VEGASOURCE 81 – Version X, C – with Interlock switch

Position 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

Component Housing – Interlock switch Screw Key Mounting plate Padlock – Numerical code Source holder Rivet Information label Label Label – ON/OFF Closing plate Safety screw – Torx with pin Retaining pin Housing Holding rope

Material On site On site On site 316L Steel 316L oder 1.0619 316L 316L Polyester 316L 1.4408 (CF8M) 316L 316L StSt StSt

9 Supplement

66075-EN-220701

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49

9 Supplement Materials – Housing version B – Pneumatic switchover
13

12

1

11 2

10 3

9 4

8

5

6

7

Fig. 34: Materials VEGASOURCE 81 – Version B

Position 1 2 3 4 5 6 7 8 9 10 11 12 13

Component Bracket switching indication Screws Cover Label – ON/OFF Information label Source holder Label Optional label Safety screw – Torx with pin Connection block Housing – Pneumatic switching Screw Indication of the switching status

Material galvanized steel 316L Aluminium 3.3206 (AW 6063) 316L 316L 316L oder 1.0619 Polyester 316L 316L Aluminium 3.3206 (AW 6063) Aluminium 3.3206 (AW 6063) 316L Plastic

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50

VEGASOURCE 81 · Source holder

9 Supplement Materials – Device version B – Pneumatic switchover with ON/OFF position switches

15
1 14

13 2

12 3

11

4

10

5

9

6

7

8

Fig. 35: Materials VEGASOURCE 81 – Version B – with ON/OFF position switches

Position 1 2 3 4 5 6 7 8 9 10 11
12 13 14 15

Component

Material

Bracket – Switching indication

galvanized steel

Screws

316L

Cover

Aluminium 3.3206 (AW 6063)

ON/OFF position switch

Plastic

Label – ON/OFF

316L

Information label

316L

Source holder

316L oder 1.0619

Label

Polyester

ON/OFF position switch – Lid

Aluminium, powder-coated

Cable gland

PA

ON/OFF position switch – Connection hous- Aluminium, powder-coated ing

Connection block

Aluminium 3.3206 (AW 6063)

Housing – Pneumatic switching

Aluminium 3.3206 (AW 6063)

Screw

316L

Indication of the switching status

Plastic

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VEGASOURCE 81 · Source holder

51

9 Supplement Pneumatic switching (optional) Pivoting range Compressed air connection Switching pressure Reset of the switching Compressed air conditioning
Connection data Operating voltage Current consumption – Measuring
plate not included Current consumption – Measuring
plate included

180° G 3.5 … 6 bar (51 … 87 psi) by spring force Class 3 acc. to ISO 8573-1, pressure dew point 10 K below operating temperature, particle size 40 µm Notes for Europe: For compressed air (gas of group 2), the pneumatic actuator is excluded from the requirements of the Regulation on Pressure Equipment (PED) 97/23/EC based on Article 1, Clause 3.6 of the directive.
8 V 3 mA
1 mA

Source and vessel characteristics

Number of half value layers of the source holder

Cs-137

4.9

Max. activity of the source

Cs-137

740 MBq (20 mCi)

Dose rate diagram

The isodistance curve indicates the local dose rate at a certain distance from the surface of the source container. The following isodistance curve applies to a Cs-137 source as an example.

The isodistance curve refers to the switching position OFF.

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52

VEGASOURCE 81 · Source holder

Dose rate diagram for Cs-137 5
a b

9 Supplement

3a

b

c

r

c

b

a

c

2

a

cbc

b

4

c

a
1

b

a

6
Fig. 36: Dose rate diagram (distance: 1 m) – example: source holder VEGASOURCE 81 with Cs-137, 20 mCi (740 MBq) a Distance: 1000 mm (39.4 in) b Distance: 305 mm (12 in) c Distance: 50 mm (2 in)

Measuring points
1 2 3 4 5 6 (switching position OFF)

a 1000 mm (39.4 in)
1.32 µSv (0.132 mR)
2.45 µSv (0.245 mR)
0.82 µSv (0.082 mR)
0.62 µSv (0.062 mR)
2.61 µSv (0.261 mR)
2.10 µSv (0.21 mR)

b

c

305 mm (12 in) 50 mm (2 in)

11.2 µSv (1.12 mR)
22.5 µSv (2.25 mR)
15.8 µSv (1.58 mR)
7.71 µSv (0.771 mR)
19.5 µSv (1.95 mR)
30.1 µSv (3.01 mR)

139 µSv (13.9 mR)
314 µSv (31.4 mR)
154 µSv (15.4 mR)
84.8 µSv (8.48 mR)
224 µSv (22.4 mR)
256 µSv (25.6 mR)

Tab. 11: Radiation values – Isodistance curve
Ambient conditions Ambient pressure

Atmospheric pressure

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53

9 Supplement

Ambient temperature (flange temperature)

VEGASOURCE 81 with manual switching

-50 … +200 °C (-58 … +392 °F)

VEGASOURCE 81 with pneumatic switching

-20 … +80 °C (-4 … +176 °F)

Vibration resistance

DIN EN 60068-2-64 test Fh; 10 … 2000 Hz; 5 g2/Hz

Flame resistance

Temperature resistance

821 °C (1510 °F) for 30 min.

Fire class

F according to IEC 62598

Protective measures Protection rating

IPx6 (NEMA Type 4)

9.2 Dimensions
VEGASOURCE 81, Version X, C – Manual changeover

ø 114 mm (4.50″)

1

167 mm (6.57″) 158 mm (6.22″)
A

152,4 mm (6.00″)

152,4 mm (6.00″)

Fig. 37: Source holder VEGASOURCE 81, version X, C – Manual changeover
1 Cover (optional) A Free height for removal of the loading tube = 520 mm (20.5 in)

Features
· Stirrup for manual switching on/off · Padlock for securing the switch position OFF or ON/OFF · Cover (optional)

54

VEGASOURCE 81 · Source holder

66075-EN-220701

66075-EN-220701
158 mm (6.22″)
A

9 Supplement VEGASOURCE 81, version X, C – Manual switchover with ON/OFF position switches
ø 114 mm (4.50″)

152,4 mm (6.00″)

152,4 mm (6.00″)

Fig. 38: Source holder VEGASOURCE 81, version X, C – Manual switchover with ON/OFF position switches A Free height for removal of the loading tube = 520 mm (20.5 in)
Features
· ON/OFF position switch for signalling of the actual switching condition · Stirrup for manual switching on/off · Padlock for securing the switch position OFF or ON/OFF · Cover (optional)

VEGASOURCE 81 · Source holder

55

158 mm (6.22″)
A

9 Supplement VEGASOURCE 81, version X, C – Manual switchover with Interlock switch
ø 114 mm (4.50″)

152,4 mm (6.00″)

152,4 mm (6.00″)

Fig. 39: Source holder VEGASOURCE 81, version X, C – Manual switchover with Interlock switch A Free height for removal of the loading tube = 520 mm (20.5 in)

Features
· Interlock safety switch for access control with active source · Stirrup for manual switching on/off · Padlock for securing the switch position OFF or ON/OFF

66075-EN-220701

56

VEGASOURCE 81 · Source holder

VEGASOURCE 81, Version B – Pneumatic switching

87 mm (3.44″)

283 mm (11.16″)

9 Supplement

66075-EN-220701
380 mm (14.95″)
A

152,4 mm (6.00″)

152,4 mm (6.00″)

Fig. 40: Source holder VEGASOURCE 81, version B – Pneumatic switching A Free height for removal of the loading tube = 770 mm (30.3 in)
Features
· Facility for pneumatic switchover · Padlock for securing the switch position OFF

VEGASOURCE 81 · Source holder

57

9 Supplement VEGASOURCE 81, version B – Pneumatic switchover with ON/OFF position switches

148 mm (5.83″)

283 mm (11.16″)

380 mm (14.95″)
A

152,4 mm (6.00″)

152,4 mm (6.00″)

Fig. 41: Source holder VEGASOURCE 81, version B – Pneumatic switchover with ON/OFF position switches A Free height for removal of the loading tube = 770 mm (30.3 in)

Features
· Facility for pneumatic switchover · ON/OFF position switch for signalling of the actual switching condition · Padlock for securing the switch position OFF

58

VEGASOURCE 81 · Source holder

66075-EN-220701

VEGASOURCE 81, beam exit channel

9 Supplement

5° 30° 45°
40° 60°

158 mm (6.22″)
Fig. 42: Beam exit channel (e.g. version X, C)

53,6 mm (2.11″)

VEGASOURCE 81, base plate

152,4 mm (6.00″)
127 mm (5.00″)

76,2 mm (3.00″)

152,4 mm (6.00″) 127 mm (5.00″)

Fig. 43: Base plate with holes (e.g. version X, C)

146 mm (5.75″)

66,7 mm (2.63″)

(ø0.4113″m) m

VEGASOURCE 81 · Source holder

59

66075-EN-220701

9 Supplement
Gamma modulator (optional)
ø 144 mm (5.67″)

523 mm (20.59″)

233 mm (9.13″)

160 mm (6.30″)

Fig. 44: Gamma modulator for uninterrupted measurement even with X-ray radiation

66075-EN-220701

60

VEGASOURCE 81 · Source holder

9 Supplement
Mounting brackets KV 31, for pipes from 50 … 220 mm (1.97 … 8.66 in) for 30° diagonal irradiation

Fig. 45: Mounting brackets for diagonal mounting on pipes from 50 … 220 mm (1.97 … 8.66 in)

VEGASOURCE 81 · Source holder

61

66075-EN-220701

9 Supplement Mounting brackets KV 31, for pipes from 50 … 220 mm (1.97 … 8.66 in)
1
2 3 4
Fig. 46: Mounting brackets for mounting on pipes from 50 … 220 mm (1.97 … 8.66 in) for 30° diagonal irradiation 1 Source holder (VEGASOURCE) 2 Radiometric sensor (MINITRAC) 3 Radiated area 4 Mounting bracket

66075-EN-220701

62

VEGASOURCE 81 · Source holder

Mounting brackets KV 31, for pipes from 50 … 220 mm (1.97 … 8.66 in)

9 Supplement

1
2
3 4
Fig. 47: Mounting brackets for mounting on pipes from 50 … 220 mm (1.97 … 8.66 in) 1 Source holder (VEGASOURCE) 2 Radiometric sensor (MINITRAC) 3 Radiated area 4 Mounting bracket

66075-EN-220701

VEGASOURCE 81 · Source holder

63

9 Supplement
9.3 Manufacturer declaration

66075-EN-220701

64

VEGASOURCE 81 · Source holder

9 Supplement
9.4 Industrial property rights
VEGA product lines are global protected by industrial property rights. Further information see www.vega.com. VEGA Produktfamilien sind weltweit geschützt durch gewerbliche Schutzrechte. Nähere Informationen unter www.vega.com. Les lignes de produits VEGA sont globalement protégées par des droits de propriété intellectuelle. Pour plus d’informations, on pourra se référer au site www.vega.com. VEGA lineas de productos están protegidas por los derechos en el campo de la propiedad industrial. Para mayor información revise la pagina web www.vega.com. . www.vega.com. VEGA < www.vega.com
9.5 Trademark
All the brands as well as trade and company names used are property of their lawful proprietor/ originator.

66075-EN-220701

VEGASOURCE 81 · Source holder

65

INDEX
INDEX
A
Accessories ­ Gamma modulator 18 ­ Set of labels 19
Application area 12
C
Cable 29, 32 Checking the switchover 39 Cleaning 38 Compressed air connection 30 Control areas 6
D
Delivery specifications 17 Dismount 44 Dismounting 44 Dose rate diagram 53
E
Eye-bolt 22
F
Functional principle 13
G
Gamma modulator 18
H
Handling permit 5
I
Immediate measures 42 In case of emergency 42 Inspection 38 Installation control 28
L
Labels 19 Lifting devices 14, 20 Local dose rate 28, 39 Lug 20
M
Maintenance 38 Moisture 20 Mounting accessories 18 Mounting bracket 18, 24
66

O
Orientation ­ Density measurement 23 ­ Level measurement 21 ­ Point level detection 21
P
Pneumatic switching 29, 31, 52 Potential equalisation 29 Protective cap 18, 27, 34
R
Radiation protection 5 Radiation safety officer 6, 7, 28, 38, 39, 40, 42, 44 Rectify faults 42 Reference O-ring 38 Return of the source 44 Return shipment 45
S
Safety instructions 6 Screw locking device 27 Service hotline 42 Source 13, 52 Storage 17 Switching the radiation on 33, 35
T
Technical data 46 Tightness test 40 Transport 14 Transport inspection 14 Transport papers 17 Transport regulations 17 Type A packaging 14 Type label 9
V
Versions 10
W
Wipe test 40
VEGASOURCE 81 · Source holder

66075-EN-220701

Notes

66075-EN-220701

VEGASOURCE 81 · Source holder

67

Printing date:

66075-EN-220701

All statements concerning scope of delivery, application, practical use and operating conditions of the sensors and processing systems correspond to the information available at the time of printing. Subject to change without prior notice
© VEGA Grieshaber KG, Schiltach/Germany 2022

VEGA Grieshaber KG Am Hohenstein 113 77761 Schiltach Germany

Phone +49 7836 50-0 E-mail: info.de@vega.com www.vega.com

References

• BfS - Startseite
• VEGA - Level - Switching - Pressure

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