LAPP AUTOMAATIO Threaded Temperature Sensor With Cable Type T-Screw / W-Screw Instruction Manual
- June 9, 2024
- LAPP AUTOMAATIO
Table of Contents
- Product description and intended use
- Temperatures, measuring
- Temperatures, ambient
- Code key
- Technical data
- Installation instructions
- Installation of accessories
- TC; connection wiring
- TC; thermocouple cable standards (color table)
- Manufacturer contact information
- Document history
- References
- Read User Manual Online (PDF format)
- Download This Manual (PDF format)
EPIC® SENSORS
THREADED TEMPERATURE SENSOR WITH CABLE
TYPE T-SCREW / W-SCREW
DATA SHEET 22
INSTALLATION INSTRUCTIONS
AND USER MANUAL
Product description and intended use
Sensor types T-SCREW (thermocouple, TC) and W-SCREW (resistance, RTD) are
threaded temperature sensors with cable.
Sensors are intended for various industrial temperature measuring
applications. The construction is designed with screw installation and flat
tip measuring element of acid proof steel. The hexagonal nut for driving the
threaded screw can be solid (SCREW-S-) or rotating (SCREW-R-).
Sensor element protection tube material can be chosen, and element / cable
length can be produced according to customer needs. Wire and cable sheath
materials can be chosen.
NOTE!
All combinations are not possible, since element ØOD, thread size/length
and cable type are depending on each other. For possible combinations, please
contact our product specialists.
Measuring elements are rigid, non-bendable versions. Elements can be TC or RTD
elements, standard versions are K-type thermocouple (for T-SCREW) and 4-wire
Pt100 (for W-SCREW). Element tip is flat, to give an optimal thermal
connection to the measured surface.
Tailored versions are produced on request.
Also available as ATEX and IECEx approved protection type Ex i versions.
Please see section Ex i data.
EPIC® SENSORS temperature sensors are measuring devices intended for
professional use. They should be mounted by professionally capable installer
who understands the installations surroundings. The worker should understand
mechanical and electrical needs and safety instructions of the object
installation. Suitable safety gear for each installation task must be used.
Temperatures, measuring
Allowed measuring temperature range for sensor tip is:
- With Pt100 -200…+300 °C, depending on cable material
- With TC -200…+300 °C, depending on TC type and cable material
Temperatures, ambient
Allowed maximum ambient temperature for wires or cable, according to cable type, is:
- SIL = silicone, max. +180 °C
- FEP = fluoropolymer, max. +205 °C
- GGD = glass silk cable/metal braid jacket, max. +350 °C
- FDF = FEP wire insulation/braid shield/FEP jacket, max. +205 °C
- SDS = silicone wire insulation/braid shield/silicone jacket, only available as 2 wire cable, max. +180 °C
- TDT = fluoropolymer wire insulation/braid shield/ fluoropolymer jacket, max. +205 °C
- FDS = FEP wire insulation/braid shield/silicone jacket, max. +180 °C
- FS = FEP wire insulation/silicone jacket, max. +180 °C
Make sure the process temperature is not too much for the cable.
Temperatures, Ex i versions
For Ex i versions only (type designations and -EXI-), specific temperature
conditions apply according to the ATEX and IECEx certificates. For more
details, please see section: Ex i data (only for types with Ex i approval).
Code key
NOTE!
For possible combinations of element ØOD, thread size/length and cable
type, please contact our product specialists.
Dimensional drawing
Technical data
Materials| AISI 316L, maximum temperature +250 ºC, temporarily +300 ºC, other
materials on request
( Note: overall max. temperature according to the cable)
---|---
Diameter| 3. 4, 5, 6 or 8 mm, other diameters on request
Thread size and length| According to request, all sizes and lengths available
Note: minor diameter of thread cannot be < element diameter
Cable material| SIL = silicone, max. +180 ºC
FEP = fluoropotymer, max. +205 ºC
GGD = glass silk cable/metal braid jacket, max. +350 ºC
FDF = FEP wire insulation/braid shield/PEP jacket, max. +205 ºC
SDS = silicone wire insulation/braid shield/silicone jacket, only available as
2 wire cable, max. + 180 ºC
TDT = fluoropolymer wire insulation/braid shield/fluoropolymer jacket, max.
+205 ºC
CFDS = FEP wire insulation/braid shield/silicone jacket, max. +180 ºC
FS = FEP wire insulation/silicone jacket, max. +180 ºC
Tolerances Pt 100 (IEC 60751)| A tolerance ±0.15 + 0.002 x t, operating
temperature -100…+450 ºC
B tolerance ±0.3 + 0.005 x t, operating temperature -196…+600 ºC
B 1/3 DIN, tolerance ± 1/3 x (0.3 + 0005 x t), operating temperature -196…+600
ºC
B 1/10 DIN, tolerance ± 1 / 10 x (0.3 + 0.005 x t), operating temperature
-196…+600 ºC
Tolerances thermocouple (IEC 60584)| Type I tolerance class 1 = -40…375 ‘C
±1.5 ‘C, 375…750 ”C =0.004 x t
Type K and N tolerance class 1 = -40…375 ‘DC ± 1.5 ‘DC, 375…1000 DC ±0.004 x t
Temperature range Pt100| -200…+300 ºC, depending on material
Temperature range thermocouple| -200…+300 ºC, depending on thermocouple type
and material
Approvals| ATEX, IECEx, METROLOGICAL PATTERN APPROVAL
Quality certificate| ISO 9001:2015 and ISO 14001:2015 issued by DNV
Materials
These are the standard materials of components for the sensor types T-SCREW
/ W-SCREW.
- Cable/wires: please see Technical data
- Heat shrink tube: Irradiated Modified Polyolefin (max. +125 °C), only on request, not used as standard
- Sensor element and sealant tube: AISI 316L
- Hexagonal nut: AISI 316L
Other materials can be used on request.
Installation instructions
Before any installation, make sure the target process/machinery and site are
safe to work!
Make sure the cable type matches the temperature and chemical requirements of
the site.
Installation phases:
- Insert the sensor tip in a threaded hole, until it is in contact with the surface to the measured.
- Tighten the thread nut clockwise until it is securely closed.
- NOTE! If using model SCREW-S: the thread nut is solid, so both the sensor element and cable must be able to rotate simultaneously with the nut!
- Never bend the sensor element, it is rigid, non-bendable protective tube structure.
- Do not use excess force since it applies pressure on the surface to be measured.
- Make sure there is no excess bending force loading the cable.
- Mount extra strain relief, e.g. cable tie, for cable, if necessary.
Tightening torques
Use only tightening torques allowed in applicable standards of each thread
size and material.
Installation of accessories
Threaded thermowells:
If sensor type T-SCREW / W-SCREW needs to be installed with a thermowell, it
can be done with the accessory well type TPIE. This thermowell type has both
inner and outer threads, which can be produced according to customer
specifications. The standard material is acid proof steel, but material can be
chosen according to application, special coatings are available, and tailored
solutions can be offered according to specific needs.
TPIE Code key: TPIE – G½ / G½ – 9 / 100 – X (example code)
-
TPIE = thermowell model
-
G½ = outer thread 1
-
/ G½ = inner thread 2
-
9 = outer diameter ØOD [mm] (ØID = 7 mm)*
-
/ 100 = immersion depth L [mm]
-
X = additional details on the text line.
-
NOTE: inner diameter ØID is not visible in code. Pt100; connection wiring
Image below: These are the connection colors of Pt100 resistor connections, according to standard EN 60751. Other connections on request.
Pt100; measuring current
The highest allowed measuring current for Pt100 measuring resistors depends on resistor type and brand.
Normally the recommended maximum values are:- Pt100: 1 mA
- Pt500: 0,5 mA
- Pt1000: 0,3 mA.
Do not use higher measuring current. It will lead to false measurement values
and might even destroy the resistor.
Above listed values are normal measuring current values. For Ex i certified
sensor types, type designation -EXI-, higher values (worst case) are used for
the self-heating calculation for safety reasons. For further details and
calculation examples, please see ANNEX A.
TC; connection wiring
Image below: These are the connection colors of TC types J, K and N. Other
types on request.
TC; non-grounded or grounded types
Normally the thermocouple sensors are non-grounded, which means the
protective tube / MI cable sheath is not connected to the thermo material hot
junction, where two materials are welded together.
In special applications also grounded types are used.
NOTE! Non-grounded and grounded sensors cannot be connected to same
circuits, make sure you are using the right type.
NOTE! Grounded TCs are not allowed for Ex i certified sensor types.
Image below: Non-grounded and grounded structures in comparison.
Non-grounded TC | Grounded TC |
---|---|
Thermo material hot junction and protective tube / MI cable sheath are
galvanically
isolated from each other.| Thermo material hot junction has galvanic
connection with
protective tube / MI cable sheath.
TC; thermocouple cable standards (color table)
Type label of standard versions
Each sensor has a type label attached to. It is a moisture and wear proof
industrial grade sticker, with black text on white label. This label has
printed information as presented below.
Image below: Example of a standard sensor type label.
Lapp Automaatio Oy
Martinkyläntie 52 FI-01720 Vantaa Finland
+358 (0) 20 764 6410
EPIC® SENSORS
www.epicsensors.com| | EPIC® SENSORS
W-SCREW-R-M8X1/10-6-100-5000/SIL-4-A-X
Prod: xxxxxxx
S/N: 210131-1234567-1
210131-1234567-1
---|---|---
Manufacturer contact information.
For some sensor types, this part may also be printed on a separate label for
practical reasons.| Trade name
Type code
Product number
Serial number with production date
CE-mark (RoHS)
Serial number as QR code
---|---
Serial number information
Serial number S/N is always printed on type label in the following form:
yymmdd-xxxxxxx-x:
- yymmdd: production date, e.g. “210131” = 31.1.2021
- -xxxxxxx: production order, e.g. “1234567”
- -x: sequential ID number within this production order, e.g. “1”
Ex i data (only for types with Ex i approval)
This sensor type is available also with ATEX and IECEx Ex i approvals.
Assembly consists of a temperature sensor for screw installation, with cable
for connection (sensor type designation -EXI-). All relevant Ex data is given
below.
Ex i – Special Conditions for Use
There are special specifications and conditions for use defined in
certificates. These include e.g. Ex data, allowed ambient temperatures, and
self-heating calculation with examples. These are presented in Annex A:
Specification and special conditions for use – Ex i approved EPIC®SENSORS
temperature sensors.
Ex i certificates and Ex markings
Certificate – Number | Issued by | Applicable area | Marking |
---|
ATEX –
EESF 21 ATEX 043X| Eurofins Electric &
Electronics Finland Oy, Finland,
Notified Body Nr 0537| Europe| Ex II 1G Ex ia IIC T6…T3 Ga
Ex II 1/2G Ex ib IIC T6…T3 Ga/Gb
Ex II 1D Ex ia IIIC T135 °C Da
Ex II 1/2D Ex ib IIIC T135 °C Da/Db
IECEx –
IECEx EESF21.0027X| Eurofins Electric &
Electronics Finland Oy, Finland,
Notified Body Nr 0537| Global| Ex ia IIC T6…T3 Ga
Ex ib IIC T6…T3 Ga/Gb
Ex ia IIIC T135 °C Da
Ex ib IIIC T135 °C Da/Db
Note!
Name change of the Notified Body Nr 0537:
- Until 31.3.2022, the name was: Eurofins Expert Services Oy
- As of 1.4.2022, the name is: Eurofins Electric & Electronics Finland Oy.
Ex i type label
For ATEX and IECEx Ex i approved versions there is more information on the
label, according to applicable standards.
Image below: Example of an ATEX and IECEx Ex i approved sensor type label.
Lapp Automaatio Oy
Martinkyläntie 52 FI-01720 Vantaa Finland
+358 (0) 20 764 6410
EPIC® SENSORS
www.epicsensors.com| | EESF 21 ATEX 043X, IECEx EESF 21.0027X
W-B-9K-D/H-400-G1/2-4-A-CB-EXI
Prod: xxxxxxx
S/N: 220231-1234567-1
II 1G Ex ia IIC T6…T3 Ga
II 1/2G Ex ib IIC T6…T3 Ga/Gb
II 1D Ex ia IIIC T135 °C Da
II 1/2D Ex ib IIIC T135 °C Da/Db
Ui= Ii= Pi= Ci= Li=
Refer to User Manual for Specific Conditions of Use
0537
210131-1234567-1
---|---|---
Manufacturer contact information.
For some sensor types, this may also be printed on a separate label for
practical reasons.| Ex certificate number(s)
Type code
Product number: Serial number with production date
Ex-mark (ATEX): Ex markings
CE-mark (ATEX and RoHS)
Notified body number
Special technical values (if needed)
Serial number as QR code
---|---
EU Declaration of Conformity
The EU Declaration of Conformity, declaring products‘ conformance to the
European Directives, is delivered with products or sent on request
Manufacturer contact information
Manufacturer HQ main office: Lapp Automaatio Oy
Street address | Varastokatu 10 |
---|---|
Postal address | FI-05800 Hyvinkää, Finland |
Phone (sales): +358 20 764 6410
Email: epicsensors.fi.lav@lapp.com
Https: www.epicsensors.com
Document history
Version / date | Author(s) | Description |
---|---|---|
20220822 | LAPP/JuPi | Telephone number update |
20220815 | LAPP/JuPi | Material name text corrections |
20220408 | LAPP/JuPi | Minor text corrections |
20220401 | LAPP/JuPi | Original version |
Although every reasonable effort is made to ensure the accuracy of the content
of the operating instructions, Lapp Automaatio Oy is not responsible for the
way the publications are used or for possible misinterpretations by end users.
The user must ensure that she or he has the latest edition of this
publication.
We reserve the right to make changes without prior notice. © Lapp Automaatio
Oy
ANNEX A – Specification and special conditions for use – Ex i approved
EPIC® SENSORS temperature sensors
Ex data for RTD (resistance temperature sensor) and TC (Thermocouple
temperature sensor)
Sensor Ex data, maximum interface values, without transmitter or / and
display.
Electrical values | For Group IIC | For Group IIIC |
---|---|---|
Voltage Ui | 30 V | 30 V |
Current li | 100 mA | 100 mA |
Power Pi | 750 mW | 550 mW @ Ta +100 °C |
650 mW @ Ta +70 °C | ||
750 mW @ Ta +40 °C | ||
Capacitance Ci | Negligible, * | Negligible, * |
Inductance Li | Negligible, * | Negligible, * |
Table 1. Sensor Ex data.
*** For sensors with long cable part, the parameters Ci and Li must be
included in the calculation.
Following values per meter can be used according to EN 60079-14: Ccable = 200
pF/m and Lcable = 1 μH/m.
Allowed ambient temperatures – Ex i temperature class, without transmitter
and/or display.**
Marking, Gas Group IIC | Temperature class | Ambient temperature |
---|
II 1G Ex is IIC T6 Ga
II 1/2G Ex ib IIC T6-T3 Ga/Gb| T6| -40…+80 °C
II 1G Ex is IIC T5 Ga
II 1/2G Ex ib IIC T6-T3 Ga/Gb| T5| -40…+95 °C
II 1G Ex is IIC T4-T3 Ga
II 1/2G Ex ib IIC T6-T3 Ga/Gb| T4-T3| -40…+100 °C
Marking, Dust Group IIIC| Power Pi| Ambient temperature
II 1D Ex is IIIC T135 °C Da
II 1/2D Ex ib IIIC T135 °C Da/Db| 750 mW| -40…+40 °C
II 1D Ex is IIIC T135 °C Da
II 1/2D Ex ib IIIC 1135 °C Da/Db| 650 mW| -40…+70 °C
II 1D Ex is IIIC T135 °C Da
II 1/2D Ex ib IIIC T135 °C Da/Db| 550 mW| -40…+100 °C
Table 2. Ex i temperature classes and allowed ambient temperature ranges
Note!
The temperatures above are without gable glands.
The compatibility of cable glands must be according to the application
specifications.
If the transmitter and/or display will be inside the transmitter housing, the
specific Ex requirements of the transmitter and/or display installation must
be noted.
The used materials must comply the needs of application, e.g., abrasion, and
the temperatures above.
For EPL Ga Group IIC the aluminium parts in connection heads are subject to
sparking by impacts or friction.
For Group IIIC the maximum input power Pi shall be observed.
When the sensors are mounted across boundary between different Zones, refer to
standard IEC 60079-26 section 6, for ensuring the boundary wall between
different hazardous areas.
ANNEX A – Specification and special conditions for use – Ex i approved
EPIC® SENSORS temperature sensors
Considering sensor self-heating
Self-heating of the sensor tip shall be considered in respect with
Temperature Classification and associated ambient temperature range and
manufacturer’s instructions for calculating tip surface temperature according
to thermal resistances stated in the instructions shall be observed.
Allowed ambient temperature range of sensor head or process connection for
Groups IIC and IIIC with different temperature classes are listed in Table 2.
For Group IIIC the maximum input power Pi shall be observed.
The process temperature shall not adversely affect ambient temperature range
assigned for Temperature Classification.
Calculation for self-heating of the sensor at the tip of sensor or the
thermowell tip
When the sensor-tip is located at environment where the temperature is
within T6…T3, it is needed to consider the self-heating of the sensor. Self-
heating is of particular significance when measuring low temperatures.
The self-heating at the sensor tip or thermowell tip depends on the sensor
type (RTD/TC), the diameter of sensor and structure of sensor. It is also
needed to consider the Ex i values for the transmitter. The table 3. shows the
Rth values for different type of sensors structure.
| Thermal resistance Rth [°C / W]
---|---
Sensor type| Resistance thermometer (RTD)| Thermocouple (TC)
Measuring insert diameter| < 3 mm| 3…<6 mm| 6…8 mm| < 3 mm| 3…<6 mm| 6…8 mm
Without thermowell| 350| 250| 100| 100| 25| 10
With thermowell made from tube material
(e.g. B-6k, B-9K, B-6, B-9, A-15, A-22, F-11, etc)| 185| 140| 55| 50| 13| 5
With thermowell — solid material (e.g. D-Dx, A-0-U)| 65| 50| 20| 20| 5| 1
Table 3. Thermal resistance based on Test report 211126
Note!
If the measuring device for RTD-measuring is using measuring current > 1 mA,
the maximum surface temperature of the temperature sensor tip should be
calculated and taken to account. Please see next page.
If sensor type has multiple sensing elements included, and those are used
simultaneously, note that the maximum power for all sensing elements should
not be more than the allowed total power Pi.
Maximum power must be limited to 750 mW. This must be guaranteed by process
owner. (Not applicable for Multi-point temperature sensor types T-MP / W-MP or
T-MPT / W-MPT with segregated Exi circuits).
ANNEX A – Specification and special conditions for use – Ex i approved
EPIC® SENSORS temperature sensors
Calculation for maximum temperature:
The self-heating of the sensor tip can be calculated from formula:
Tmax= Po × Rth + MT
(Tmax) = Maximum temperature = surface temperature at the sensor tip
(Po) = Maximum feeding power for the sensor (see the transmitter certificate)
(Rth) = Thermal resistance (K/W, Table 3.)
(MT) = Medium temperature.
Calculate the maximum possible temperature at the tip of sensor:
Example 1 – Calculation for RTD-sensor tip with thermowell
Sensor used at Zone 0
RTD sensor type: W-M-9K . . . (RTD-sensor with head-mounted transmitter).
Sensor with thermowell, diameter of Ø 9 mm.
Medium temperature (MT) is 120 °C
Measuring is made with PR electronics head mounted transmitter 5437D and
isolated barrier PR 9106 B.
Maximum temperature (Tmax) can be calculated by adding the temperature of the
medium that you are measuring and the self-heating. The self-heating of the
sensor tip can be calculated from the Maximum power (Po) which is feeding the
sensor and Rth-value of used sensor type. (See the Table 3.)
Supplied power by PR 5437 D is (Po) = 23,3 mW (from the transmitter Ex-
certificate)
Temperature class T4 (135 °C) must not be exceeded.
Thermal resistance (Rth) for the sensor is = 55 K/W (from Table 3).
Self-heating is 0.0233 W 55 K/W = 1,28 K
Maximum temperature (Tmax) is MT + self-heating: 120 °C + 1,28 °C = 121,28 °C
The result in this example shows that, the self-heating at the sensor tip is
negligible.
The safety margin for (T6 to T3) is 5 °C and that must be subtracted from 135
°C; means that up to 130 °C would be acceptable. In this example the
temperature of class T4 is not exceeded.
Example 2 – Calculation for RTD-sensor tip without the thermowell.
Sensor used at Zone 1
RTD sensor type: W-M-6/303 . . . (RTD-sensor with cable, without head-mounted
transmitter)
Sensor without thermowell, diameter of Ø 6 mm.
Medium temperature (MT) is 40 °C
Measuring is made with rail-mounted PR electronics PR 9113D isolated
transmitter/barrier.
Maximum temperature (Tmax) can be calculated by adding the temperature of the
medium that you are measuring and the self-heating. The self-heating of the
sensor tip can be calculated from the Maximum power (Po) which is feeding the
sensor and Rth-value of used sensor type. (See the Table 3.)
Supplied power by PR 9113D is (Po) = 40,0 mW (from the transmitter Ex-
certificate)
Temperature class T3 (200 °C) must not be exceeded.
Thermal resistance (Rth) for the sensor is = 100 K/W (from Table 3).
Self-heating is 0.040 W 100 K/W = 4,00 K
Maximum temperature (Tmax) is MT + self-heating: 40 °C + 4,00 °C = 44,00 °C
The result in this example shows that, the self-heating at the sensor tip is
negligible.
The safety margin for (T6 to T3) is 5 °C and that must be subtracted from 200
°C; means that up to 195 °C would be acceptable. In this example the
temperature of class T3 is not exceeded.
ANNEX A – Specification and special conditions for use – Ex i approved
EPIC® SENSORS temperature sensors
Additional information for Group II devices: (acc. to EN IEC 60079-0:
2019 section: 5.3.2.2 and 26.5.1)
Temperature class for T3 = 200 °C
Temperature class for T4 = 135 °C
Safety margin for T3 to T6 = 5 K
Safety margin for T1 to T2 = 10 K.
Note!
This ANNEX is an instructional document on specifications.
For original regulatory data on specific conditions for use, always refer to
ATEX and IECEx certificates:
EESF 21 ATEX 043X
IECEx EESF 21.0027X
Lapp Automaatio Oy
Martinkyläntie 52
FI-01720 Vantaa, Finland
lappautomaatio.fi| Technical sales:
P: +358 (0)20 764 6410
Avoimet tilaukset/Open orders:
P: +358 (0)20 764 6420
---|---
Domicile
Vantaa Y-tunnus: 1107293-1
VAT: FI1107293| A Lapp Group Company
Lapp Insulator is not affiliated with the LAPP Group
References
- Etusivu | EPIC® SENSORS
- Lapp Automaatio | Lapp Automaatio
- Frontpage | EPIC® SENSORS
- Frontpage | EPIC® SENSORS
- Lapp Automaatio | Lapp Automaatio