KOBOLD SMN Displacer Flow Switch Instruction Manual

Operating Instructions
for
All Metal Flow Switch
Model: SMN

Note

Please read these operating instructions before unpacking and putting the unit into operation. Follow the instructions precisely as described herein. The instruction manuals on our website www.kobold.com are always for the currently manufactured versions of our products. Due to technical changes, the instruction manuals available online may not always correspond to the product version you have purchased. If you need an instruction manual that corresponds to the purchased product version, you can request it from us free of charge by email (info.de@kobold.com) in PDF format, specifying the relevant invoice number and serial number. If you wish, the operating instructions can also be sent to you by post in paper form against an applicable postage fee.
The devices are only to be used, maintained, and serviced by persons familiar with these operating instructions and in accordance with local regulations applying to Health & Safety and prevention of accidents.
When used in machines, the measuring unit should be used only when the machines fulfill the EC-machine guidelines.
as per PED 2014/68/EU
In acc. with Article 4 Paragraph (3), “Sound Engineering Practice”, of the
PED 2014/68/EU no CE mark.
Table 8, Pipe, Group 1 dangerous fluids

Instrument Inspection

Instruments are inspected before shipping and sent out in the perfect condition. Should damage to a device be visible, we recommend a thorough inspection of the delivery packaging. In case of damage, please inform your parcel service/forwarding agent immediately, since they are responsible for damages during transit.
Scope of delivery:
The standard delivery includes:

• All Metal Flow Switch
  model: SMN

Regulation Use

Model SMN instruments monitor liquid flows. Only clean and homogeneous liquids of low viscosity – against which the instrument materials are resistant – should be monitored. Large switch-point inaccuracies can occur with highly viscous media.
Large dirt particles can block the float and thus cause faulty signals. Pieces of ferrite, deposited on the float (with an embedded magnet) can lead to the same effect (we recommend magnetic filters).

Operating Principle

The KOBOLD model SMN flow switch is used when extremely low flow switch points are required in combination with minimum pressure loss at high flow rates.
The flow switch operates on the well-known float principle. An orifice float with an integrated circular magnet moves within a cylindrical flow tube in the direction of the flow and against a spring.
The magnetic field of the float activates a reed contact which is mounted on the outside of the instrument in a sliding protective casing. Due to the special construction of the float and flow tube, only a low flow is required to raise the float and hence to activate the reed contact. If the flow rate increases further and the float reaches the top of its travel an additional flow path opens allowing high flow rates without a significant increase in the pressure loss.

Mechanical Connection

• Make sure that allowed max. operating pressure and temperature are not exceeded.
• The instrument can be installed vertically or horizontally in the pipework. Flow is in the direction of the arrow from bottom to top, from left to right or from right to left.
• Remove all transport restraints and make sure that none of the packing material remains in the instrument.
• Use Teflon tape or something similar to seal the threaded connections.
• The instruments should not be installed in an induction field.
• If possible, check after mechanical installation that the threaded joint/pipe connection is tight and leakproof.

Electrical Connection

7.1. with Plug Connection

• Make sure that the electrical supply lines are powerless.
• Undo the locking screw on the plug cap and remove the cap from the base.
• Mount the supply line in the plug cap as shown in the wiring diagram.
• The contact is adjusted and should not be modified.
• Insert the plug connector on the contact stem and fix it with the retaining screw.

Attention! Every single specified electrical value for the sealed contact should not be exceeded even for short periods. We recommend contact protection relays or other contact protection measures for higher switching values.
When the external devices have been connected to the limit contact and the switching point has been set, the electrical connection is complete. The instrument can now be put into operation.
7.2. Example for Contact Protective Measures
For capacitive and inductive loads (long conductors and relay/protection) we recommend the following protective schemes.

Use in hazardous areas

8.1. Statement an apparatus not containing an own potential ignition source
Statement an apparatus not containing an own potential source following Directive 2014/34/EU
that the results of the examinations with the mechanical equipment described below comply with the requirements of Directive 2014/34/EU.
Flowmeter/switch SMN. Identification numbers see ship-ping documents
are according to Directive 2014/34/EU. article 1
e) not equipment.
f) not a protective system
g) not a safety device. controlling device or regulating device
h) not a component.
When used adequately this mechanical equipment has no inherent potential ignition source and thus it is not marked in accordance with the ATEX- Directive. An internal ignition risk analysis was carried out The used medium is a fluid
The apparatus can be used as follows in explosive atmospheres in accordance with the applicable erection regulations on machines. devices and plants. such as e.g. EN 1127-1. EN 60079-14. etc
m) In Zone 1 (gas hazard. category 2G) in the explosion groups 11A. 11B and IIC
n) In Zone 2 (gas hazard. category 3G) in the explosion groups 11A. 116 and IIC
o) In Zone 21 (dust hazard. category 2D) in the explosion groups II1A and 1118
p) In Zone 22 (dust hazard, category 3D) in the explosion groups IIIA and 111B
Any electrical apparatus that may be used here do not impair the mechanical explosion protection. Those apparatus have to comply with the locally applicable zones and are not subject to this statement.
The following harmonized standards and specifications were referred to in their version applicable on the date of signature.
10 EN 1127-1 Explosive atmosphere. Explosion prevention and protection. Part 1: Basic concepts and methodology
Please note:
cc) The installation and operating instructions provided by the manufacturer are to be considered compellingly
dd) The installation regulations valid in the designated country of use are to be observed.
ee) The SMN series with its mechanical components is suitable for ambient temperatures of -10 °C to 90 °C
ff) At intended operation the temperature rising outside is < 10 K: Temperature class T4 is kept.
gg) All exterior materials consist of suitable low-sparking components no alloy The operator himself, however, is responsible ble for checking the risk of ignition caused by sparks during the operation of the complete machine.
hh) The mechanical components of the SMN have to be integrated in the equipotential bonding.
ii) Connecting cables of electrical apparatus have to be installed in a protected manner
jj) If insulated connection pipes are used. only types with a diameter < 20 mm (IIC) or < 30 mm IIB. Dust) maybe used.
kk) Dust deposits are to be removed regularly
II) If the enclosure shows signs of leakage. the apparatus t may be not operated further
mm) Leakage currents (e.g. in plants with electrical anti-corrosion protection) may not be led over the parts.
nn) When mounting the apparatus inside an explosive area. Annex A of standard EN 1127-1 has to be adhered to (if necessary. low-sparking tools have to be used).
Issued at Hofheim on June 3rd. 2019 Signed for and on behalf of Kobold GmbH

HEK_BopZ 17 nn Erganzung 1 Kobold StiVodt
8.2. ATEX reed contact 41R57**
ATEX N/O contact 41R57
II 3G Ex ic IIC T4 Gc
II 3 D Ex ic IIIC T125 °C Dc -20 °C ≤Ta≤80 °C max. 250 VAC/DC/1.5 A/100 W/100 VA
ATEX changeover contact 41R57U
II 3G Ex ic IIC T4 Gc
II 3 D Ex ic IIIC T125 °C Dc -20 °C ≤Ta≤80 °C max. 250 VAC/DC/1 A/30 W/60 VA

**Ex-relevant excerpt of the operating instructions of the reed contact 41R57

1. Preamble
   This excerpt of the operating instructions only represents the ex-relevant aspects. It is copied into the original operating manual in the same or analogous form; Textual changes are permitted, the ex-relevant statements remain.
   To ensure the function and for your own safety, please read the enclosed operating instructions carefully before you begin the installation. If you have any questions, please  contact the KOBOLD Messring GmbH, Hofheim. It applies with the original operating instructions.
   The following standard issues were considered in the evaluation of the product:
   a) IEC 60079-0:2017 Ed. 7 / EN 60079-0:2018 Explosive atmospheres – Part 0: Equipment – General requirements
   b) IEC 60079-11:2011 Ed. 6 + Corr. 2012 / EN 60079-11:2012 Explosive atmospheres – Part 11: Equipment protection by intrinsic safety “i”

2. General information on explosion protection
   The reed switches work together with various KOBOLD products and serve there for monitoring. It is available as N/O contact or changeover contact.
   The electrical connection is made via a plug – only in intrinsically safe systems. The reed switch is intended for commercial use and may only be used in accordance with the specifications in the technical documentation of Kobold and the information on the nameplate. It is only operated together with certified products via an intrinsically safe circuit. They comply with valid standards and regulations.
   The installation regulations (e.g. EN 60079-14) for systems in potentially explosive atmospheres must be observed.
   Further important details can be found in the corresponding EC-type examination certificate.

Permitted use

• The intrinsically safe reed switch can be used as follows:
  • In Zone 2 (Gas-Ex, EPL Gc) in explosion groups IIA, IIB, and IIC
  • In Zone 22 (Dust-Ex, EPL Dc) in explosion groups IIIA, IIIB, and IIIC
• The requirements for simple electrical equipment for use in intrinsically safe circuits in zones 1/21 are fulfilled.
• The qualification regarding the surface temperature is T4. For all gases, vapors, and mists with an ignition temperature> 135 ° C the equipment is not an ignition source.
  • In the dust Ex area, 125 ° C is the reference temperature for further consideration regarding the safety distance from the smoldering temperature.
• The ambient temperature range is -20 ° C ≤ Ta ≤ 80 ° C.

2.1. Electrical characteristics for Ex i
Electrical data:

• Rated voltage up to 45 volt AC / DC
• Rated current up to 2 A
• UiIC ≤ 30 V AC / DC, IiIIC ≤ 250 mA
• UiIIB ≤ 45 V AC / DC, IiIB ≤ 2 A
• UiIIIC ≤ 45 V AC / DC, IiIIIC ≤ 250 mA
• Li = negligible, Ci = negligible
• Heating on the outer housing <15 K

2.2 Type code
The equipment is identified by the following type code:

41R57 A B
41R57
A
B| Type coding Contact device
N/O contact (2 wires), Plug with black cap Change-over contact (3 wires), Plug with grey
cap
70 – 75 with marking (not ex-relevant)
45 – 50 with marking
50 – 55 with marking
60 – 65 with marking
70 – 75 with marking
60 – 65 change-over contact| 202.289
202.285
202.286
202.287
202.288
202.290| N/O
N/O
N/O
N/O
Change-over
Change-over

2.3 Temperature class
The reed switch is suitable for temperature class T4 / T125 ° C.
2.4 General requirements
2.4.1 Intended Use

a) To ensure safe operation, the products may only be used according to the instructions in the assembly instructions. During use, the legal and safety regulations required for the respective application must be observed in addition. This applies analogously when using accessories.
b) Failure to comply with the instructions given in this excerpt or in the case of improper handling of the product will render our liability null and void. In addition, the warranty on products and spare parts is void.
c) The products are not safety elements in terms of their intended use.
d) Only original parts of the manufacturer may be used.
2.4.2 General safety instructions
The reed switch corresponds to the state of the art and is reliable. The reed switch may pose a residual hazard if improperly used and operated by untrained personnel.
Every person is responsible for the installation, commissioning, maintenance or repair of the reed switch must have read and understood the assembly instructions and in particular the safety instructions.
a) Follow the general rules of technology for the selection and proper operation of a product.
b) All connected electrical and mechanical equipment must be suitable for the respective application.
c) Observe the notes in these operating instructions as well as the conditions of use and permissible data that appear from the imprints/nameplates of the respective products. d) It must be ensured that only product protection types corresponding to the zones are installed!
e) The product is only approved for proper and intended use in a normal industrial atmosphere. Immersion in liquids is not permitted.
f) It must be ensured that no falling objects can hit the product.
g) The operator must ensure lightning protection for the entire system in accordance with local regulations. h) It is the responsibility of the installer to ensure that the function of the reed switch in conjunction with the individual evaluation devices functions properly and is approved for the intended use.
i) The intrinsically safe connection – including the reed switches – must be made via approved/tested evaluation devices, which may need to be equipped with suitable Zener barriers or switching amplifiers.
3. Commissioning, installation
Depending on the IP degree of protection, the time for cleaning the equipment (dust deposits) must be specified. Other important facts:
a) The product may be put into operation in Zone 2 (Cat. 3G, EPL Gc) or in Zone 22 (Cat. 3D, EPL Dc in intrinsically safe circuits only by specialists with a qualification similar to a qualified person according to TRBS 1203.
b) The requirements for simple electrical equipment that apply to the hazardous area of Zones 1/21 according to EN 60079-11 are fulfilled.
c) The products may only be used in the usual industrial atmosphere. In the presence of aggressive substances in the air, the manufacturer must always be consulted. The products must be adequately protected in adverse environmental conditions.
d) Operation of the product is only permitted in fully assembled and undamaged enclosures. In case of possible damage, a zone carryover may have to be considered by the operator; Moreover, operation of the housing is not permitted if the housing is damaged.
e) The environmental conditions specified in the operating instructions must be adhered to and protected against adverse environmental conditions.
f) Heat radiation from foreign products/components must also be considered.
g) The reed switch must be protected against inadmissible access of liquids and/or soiling.
h) Fixed parts (e.g. due to frost or corrosion) must not be loosened by force in the presence of an explosive atmosphere. Icing must therefore be avoided.
i) The reed switch may only be subjected to minor vibrations, see also IEC 34-14.
j) To ensure the discharge of electrostatic charges, the national requirements must be considered.
k) In particular, isolated capacities must be prevented.
l) Only those Zener barriers or switching amplifiers may be used whose output circuits are approved/tested for use in potentially explosive atmospheres. In Europe, use in Zones 1/21 requires an EC type-examination certificate for the equipment concerned issued by a body designated for explosion protection.
m) The voltage of the supply units must be less than or equal to the voltage Ui of the reed switch.
n) The total current Io of the supply units must be less than or equal to the current Ii of the reed switch.
o) For the installation of the intrinsically safe circuit, a control drawing (system description) to be created by the installer/operator is required.
p) Equipotential bonding must be established along the intrinsically safe circuit when using a grounded supply.
q) The certificates must be taken into account, including the special conditions specified therein.
r) Resistant parts of the product (e.g. due to frost or corrosion) must not be forcibly loosened in the presence of an explosive atmosphere.
s) Within the potentially explosive area, installation may only be carried out taking into account the locally applicable installation regulations. The following conditions must be observed (incomplete):
t) Installation and maintenance may only be carried out in an explosion-free atmosphere and in compliance with the regulations in force in the country of the operator.
u) Additional precautions must be taken if the presence of hydrogen sulfide, ethylene oxide and/or carbon monoxide is to be expected: these substances have very low ignition energy!
v) In the presence of these substances and in the presence of a substance of the explosion group IIC and in the case of a presumably existing potentially explosive atmosphere, only spark-free tools may be used!
4. Maintenance, servicing
Definition of terms according to IEC 60079-17:
Maintenance and Repair:
A combination of all activities performed to maintain or recover an item in a condition that meets the requirements of the specification in question and ensures the performance of the required functions.
Inspection:
An activity involving the careful examination of an object, with the aim of obtaining a reliable statement of the condition of the object, carried out without disassembly or, if necessary, with partial disassembly, supplemented by measures such as measurements becomes.
Visual inspection:
A visual inspection is a test that detects visible faults, such as missing screws, without the use of access devices or tools.
Close-up Test:
A test that identifies, in addition to the aspects of visual inspection, such errors, such as loose screws, which can only be obtained by using access devices, such as a screwdriver, e.g. steps (if necessary), and tools are visible. For close-up tests, housing usually does not need to be opened or the equipment must be de-energized.
Detail test:
A test that detects, in addition to the aspects of close-up testing, such defects as, for example, loose connections that can only be recognized by opening housings and/or, if necessary, using tools and test equipment.
a) Maintenance measures may only be carried out by qualified persons.
b) Only use accessories in potentially explosive atmospheres that comply with all requirements of European directives and national legislation.
c) Maintenance measures with the dismantling of the reed switch may only be carried out in an ex-free atmosphere.
d) The replacement of components may only be carried out with original spare parts, which are also approved for use in potentially explosive areas.
e) The products must be regularly maintained and cleaned in the Ex area. The intervals are set by the operator according to the environmental demands on site.

| Activity| visual inspection per month| Close inspection every months| 6. detailed inspection every   12 months
---|---|---|---|---
1| Visual inspection of the reed switch for damage, remove dust deposits|

●

2| Check for integrity and function|

●

3| Testing the entire system| The responsibility of the operator

5. Troubleshooting
Products operated in conjunction with potentially explosive atmospheres must not be modified. Repairs to the product may only be performed by specially trained and authorized personnel.
6. Disposal
Disposal of the packaging and used parts must be in accordance with the regulations of the country in which the product is installed.
7. Marking of the reed switch (nameplate)

In the serial number, the year of manufacture can be coded; optionally, it can also be specified as plain text.
As a rule, a readable marking has been made for the type of explosion protection required in field use – even before the product is put into operation for the first time.
A reed switch that has already been operated in non-intrinsically safe circuits may no longer be used in intrinsically safe circuits later on.

Maintenance and Care

The instrument needs no maintenance when the measured medium is not polluted. Lime and other deposits should be removed regularly from the inside parts of the instruments. The instrument cannot be taken apart and must be cleaned with a suitable cleanser.

Technical Information

Housing:| SMN-11..: brass, Ms 58
SMN-12..: stainless steel, 1.4301
---|---
Float:| SMN-11..: brass, Ms 58
SMN-12..: stainless steel, 1.4301
Cage:| SMN-11..: brass, Ms 58
SMN-12..: stainless steel, 1.4301
Spring:| stainless steel
Magnets:| Ceramic
Max. pressure:| 100 °C
Installation position:| SMN-11..: 250 bar
SMN-12..: 350 bar
Contact components:| horizontal or vertical (upward direction),
flow in direction of the arrow
Electrical connection:| 1 bistable reed contact
N/O contact, changeover contact,
Electrical switching values:| Connector DIN 175301-803
| N/O contact (standard) max. 250 VAC/DC / 1,5 A / 100 W / 100 VA changeover contact (Standard) max. 250 VAC/DC / 1 A / 30 W / 60 VA N/O contact and changeover contact (cCSAus) max. 230 VDC / 0,26 A / 60 W, 60 VDC / 1 A / 60 W max. 240 VAC / 0,42 A / 100 W, 100 VAC / 1 A / 100 W
Accuracy:| ± 5% f. s.

Use in hazardous areas

Mechanics:| The apparatus can be used as follows in explosive atmospheres in accordance with the
applicable erection regulations on machines, devices, and plants, such as e.g. EN 1127-1, EN 60079-14, etc.:
a) In Zone 1 (gas hazard, category IIG) in the explosion groups IIA, IIB, and IIC
b) In Zone 2 (gas hazard, category IIIG) in the explosion groups IIA, IIB, and IIC
c) In Zone 21 (dust hazard, category IID) in the explosion groups IIIA and IIIB
d) In Zone 22 (dust hazard, category IIID) in the explosion groups IIIA and IIIB
---|---
ATEX N/O contact 41R57
…G0 and GG:| II 3 G Ex ic IIC T4 Gc
II 3 D Ex ic IIIC T125 °C Dc -20 °C ≤Ta≤80 °C max. 250 VAC/DC/1.5 A/100 W/100 VA
ATEX changeover contact 41R57U
…H0 and HH:| II 3 G Ex ic IIC T4 Gc
II 3 D Ex ic IIIC T125 °C Dc -20 °C ≤Ta≤80 °C max. 250 VAC/DC/1 A/30 W/60 VA
Hysteresis:
Protection:| approx. 3.5 mm float movement
IP 65 (electr. contact)
IP 54 (side indicator)

Order Codes

Order Details (Example: SMN-1150H R0 R 25)

Max Flow: 100 l/min
Fix Switch point at approx. 1l/min with falling flow rate| SMN-1150 H…| SMN-1250 H…| ..R0.. = 1 N/O contact
..U0.. = 1 changeover contact
..C0.. = 1 N/O contact (cCSAus)
..D0.. = 1 changeover contact
(cCSAus)
…G0…= 1 ATEX N/O contact
(model 41R57)
…H0…= 1 ATEX changeover c.
(model 41R57U)| …R25 = G1 female
…N25 = 1 NPT female

Dimensions

Pressure Loss Diagram

EU Declaration of Conformance (SMN)

We, KOBOLD-Messring GmbH, Hofheim-Ts, Germany, declare under our sole responsibility that the product:
All Metal Flow Switch model: SMN-…
to which this declaration relates is in conformity with the standards noted below:
EN 61010-1:2011
Safety requirements for electrical equipment for measurement, control and laboratory use – Part 1: General requirements
EN 60529:2014
Protection type through the case (IP code)
EN IEC 63000:2018
Technical documentation for the assessment of electrical and electronic products with respect to the restriction of hazardous substances Also, the following EC guideline is fulfilled:

2014/35/EU
2011/65/EU
2015/863/EU| Low Voltage Directive
RoHS (category 9)
Delegated Directive (RoHS III)
---|---

Hofheim, 28 April 2022

|
---|---
H. Volz General Manager| M. Wenzel Proxy Holder

EU Declaration of Conformance (Reed contact 41R57**)

EU DECLARATION OF CONFORMITY to confirm the conformance of a device with the Directive
2014/34/EU
The manufacturer
KOBOLD Messring GmbH, Nordring 22-24, DE 65719 Hofheim
hereby declares under sole responsibility, that the machinery or subassembly equipment described below
Description
Reed-Schalter/ Reed contact 41 R57**
Kennzeichnung / Marking: II 3G Ex is IIC T4 Gc or II 3D Ex is IIIC T125 °C Dc
Serial number see shipping documents and type la-bel
conforms with the provisions of the following harmonized standards in the version of the European Union:

• /EC 60079-0:2017 Explosive atmospheres —Part 0: General Requirements
• EN 60079-11:2012 Explosive atmospheres — Part 11: Equipment protection by intrinsic safety 1″

Also conforms with the following European and National Standards and technical provisions in the version, valid at signature date:

• Technical rules for hazardous substances TRGS 727:2016, Avoidance of ignition hazards as a consequence of electrostatic charging

done at Hofheim on March, 21 2019

Name of signatory
Manfred Wenzel
Prokorist / authorized signatory
Unterzeithnet fOr and im Namen der / Signed for and on behalf of KOBOLD Westing GmbH
Unterschrift / signatur

Statement of conformity reed contact 41R57**

1. Statement of Conformity

2. – Directive 2014/34/EU -Equipment Intended for Use in Potentially Explosive Atmospheres

3. Nummer:
   Document-ID: ExGuide 18 ATEX 0007

4. Generate:
   Equipment: Reed-Schalter / Reed contact 41R57

5. Hersteller:
   Manufacturer: KOBOLD Messring GmbH

6. Anschrift:
   Address: Nordring 22-24, DE 65719 Hofheim

7. This product and any acceptable variation thereto Is specified in the enclosure to this Statement of Conformity.

8. Exide Technology — Gunter Hamper VDI certifies that this product has been found to comply with the Essential Safety and Health Requirements relating to the design and construction of product of Cate-gory 3 intended for use in potentially explosive atmospheres given in Annex II of the Directive. The ISO 9001 system of ExGuide Technology —Gunter Hamper VDI is supervised by 620 under the registration number 07180217
   The examination and test results are recorded In the confidential report number D068180222.

9. Compliance with the Essential Safety and Health Requirements has been assured by compliance with the following standards:

10. If the sign *X” is placed after the Document-ID (3), it indicates that the product is subject to special conditions for safe use specified in the enclosure of this Statement of Conformity.

11. This Statement of Conformity relates only to the design and construction of the specified product. If applicable, further requirements of this Directive apply to the manufacturing and supply of this product.

12. The marking of the product shall include the following:
    ll 3G Ex ic IIC T4 Gc und/oder / and/or
    ll 3D Ex ic HIC T125 °C Dc
    -20 °C Ta 80 °C
    Telefon: +49 2305 357130
    Telefax: +49 2305 357137
    E-Mail: info@exguide.de
    URL: www.exguide.de
    KA88170710 4 11157 18 ATEX 0117 odi
    Diese Konformitatsaussage 1st ohne Unterschrlft ungilltlgt Im Original sind Teile in rater Schrift dargestellt (Zelle 1, 3, 14 and Logo)
    This statement of conformity is not valid without a signature In the original, parts are printed in red (lines 1, 3, 14, and logo).

13. Enclosure to

14. Statement of Conformity
    ExGuide 18 ATEX 0007

15. Description of product
    (15a) The reed contact works with different devices and serves signals. They are available as N/C/ N/0 or change-over contacts.
    The standard electrical connection is made by plugs and sockets — only for intrinsic safety circuits.
    (15b) The product can be used as follows:
    a) In Zone 2 [Gas, Category 38, EPL Sc) in the explosion group’s HA,118, and HIC
    b) In Zone 22 (dust hazard, category 3D, EPL Dbi in the explosion groups 111A, 1116 and IBC
    The qualification with regard to the surface temperature is T4; for all gases, vapors, and mists with an ignition temperature >135 C the product is not an ignition source.
    In Dust-Ex-area 125 Cis the reference temperature for further consideration in regard to a safe distance from the smoldering temperature. The requirements for simple electrical apparatus according to IEC 60079-11, valid for the hazardous area of Zone 1 / 21 are met.
    (15c) Electrical data:
    rated voltage up to
    rated current up to
    Li = negligible,. CI = negligible warming at the outer enclosure
    (15c) Type codeType
    41R57 A B
    41 R57
    A
    B| No. Description
    Type coding
    Contact device
    3 N/O contact (2 wires), Plug with black cap
    6 Change-over contact (3 wires), Plug with grey cap

• Marking for sensitivity (not ex-relevant)
  ---|---

Minimum identification of the electrical system: Name and address of the manufacturer
Type: 41R57′ (serial number] /year of construction] (Additional hints are allowed.)
(15e)  Test reports are stored in the internal document D068180222. Together with the manufacturer, a confidential test report PB613180222 has been issued.

16. Safety relevant notes:
    a) The notes in the operator’s manual, enclosed to each order of the manufacturer (installation rules and instructions on assembly), have to be followed strictly.
    b) In order to ensure the explosion protection required, any electrical and additional mechanical product has to meet the requirements of the locally valid zones and has to be checked separately by the company installing the unit.
    c) Only products suitable for operation in the relevant zone and for which the relevant documents are available may be connected to the circuits.
    d) The reed contact has to be mounted in such a manner that any possible electrostatic charges may be discharged.
    e) Any direct electrostatic discharge of high energy on the product is not permitted (and can usually not be caused by human touch).
    f) The installation of the reed contact has to protect them against mechanical impact.
    g) An equipotential bonding must be installed along the intrinsically safe circuit – if the reed switch is supplied via an earthed circuit.
    h) Parts being stuck (e.g. by frost or corrosion) may not be removed by force in the presence of an explosive atmosphere.
    i) In Zone 2/22 the ignition curves of EN 60079-11 have to be observed without safety factors and to be taken into account for the installation.
    j)The safety factor 1,5 shall be applied in zone 1/21.
    k) In each case the manufacturer has to create a control drawing (prod of intrinsic safety) to be supplied with the delivery documentation.

1. Ice formation on the device must be avoided.

17. Special conditions for safe use none

Suite/page 1 von / of 4 Zu / to ExGuidel8 ATEX 0007
Deese Konformitatsaussaga mtt then Anhangen darf nur unverandert wetter better warden
This statement of conformity and Its enclosures may only be reproduced In Its entirety and without change
ExGuide Technology – Giinter Hamper VDI, Birkenstrafie 10, DE 44579 Castrop-Rauxel
SMN K05/0322

Documents / Resources

| KOBOLD SMN Displacer Flow Switch [pdf] Instruction Manual
SMN, Displacer Flow Switch, Flow Switch, Switch Displacer, Switch
---|---

References

• Industrial measuring and control equipment in the field of flow, pressure, level & temperature | Kobold Messring GmbH

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