LAPP AUTOMAATIO Epic Sensors Temperature Sensor User Manual

EPIC® SENSORS
TEMPERATURE SENSOR WITH CABLE
TYPE T-CABLE / W-CABLE, WT-KAAPELI-…-EX
DATA SHEET 16
INSTALLATION INSTRUCTIONS
AND USER MANUAL

Product description and intended use

Sensor types T-CABLE (thermocouple, TC) and W-CABLE (resistance, RTD) are temperature sensors with cable.
Sensors are intended for various industrial measuring applications. The construction allows very versatile use cases. Sensor element protection tube material can be chosen, and element / cable length can be produced according to customer needs.
Measuring elements are rigid, non-bendable versions. Elements can be TC or RTD elements, standard versions are K-type thermocouple (for T-CABLE) and 4-wire Pt100 (for W-CABLE). Tailored versions are produced on request.

Wire and cable sheath materials can be chosen.
Also available as special versions for Ex applications:

• Ex e: Also available as ATEX-approved protection type Ex e cable sensor versions.
  Please see section Ex e data.

• Ex i: 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…+350 °C, depending on cable material
• With TC -200…+350 °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 -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).

Temperatures, Ex e versions

The Ex e approved RTD cable sensor type is WT-KAAPELI-…-EX. It is a rigid, non-bendable sensor structure, similar to standard version W-CABLE.
For Ex e cable sensor versions only, specific conditions apply according to the ATEX certificates.

For type WT-KAAPELI-…-EX, certificate number EESF 18 ATEX 053X Issue 1:

The process temperature shall not exceed allowed maximum ambient temperature limits for Groups I IC and IIIC. Allowed maximum ambient temperature ranges for Group I IC according to T Class ranges T6.. T3 are:
T6: -40 00 S Tamb s +80 °C
T5: -40 °C Tamb s +95 °C
T4: -40 “C 5 Tamb +130 °C
T3. -40 °C Tamb <+185 °C
Allowed maximum ambient temperature ranges for Group 1110 according to T Class ranges T60 “C T200 °C are:
T60 °C: -40 °C T200 °C+60 °C
T200 °C: -40 °C s Tamb s +200 °C
For intermediate values, the maximum surface temperature T** °C shall be equal to maximum Tamb value.
Please see also section Ex e data.

Code key

Dimensional drawing

Technical data

Materials| AISI 316L, maximum temperature +300 °C, temporarily +350 °C, other materials on request
---|---
Diameter| 3, 4, 5, 6, 8 mm, other diameters on request
Cable materials| SIL = silicone, max. +180 t
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 CC FS = FEP wire insulation/silicone jacket, max. +180 °C
Tolerances Pt 100 (IEC 60751)| A tolerance ±0.15 + 0.002 x t, operating temperature -100…+450 ‘C
B tolerance ±0.3 + 0.005 x t, operating temperature -196…+600 °C
B 1/3 DIN, tolerance ±1/3 x (0.3 + 0.005 x t), operating temperature -196…+600 °C
B 1/10 DIN, tolerance ±1/10 x (0.3 + 0.005 x t), operating temperature -196…+600 °C
Tolerances thermocouple (IEC 60584)| Type 1 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 °C ±1.5 °C, 375…1000 °C ±0.004 x t
Temperature range Pt 100| -200…+350 °C, depending on cable material
Temperature range thermocouple| -200…+350 °C, depending on thermocouple type and cable material
Approvals| ATEX, IECEx, EAC Ex, 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-CABLE / W-CABLE.

• Cable/wires
• Heat shrink tube
• Sensor element| please see Technical data
Irradiated Modified Polyolefin (max +125 °C),
only on request, not used as standard
AISI 316L
---|---

Other materials can be used on request.

Installation instructions and example

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:

• Install the sensor tip as close to the measured object as possible.
• Never bend the sensing element, it is rigid, non-bendable tube construction!
• Use fixing accessories applicable to each installation/site.
• Make sure there is no excess bending force loading the cable.
• Mount extra strain relief, e.g. cable tie, for cable, if necessary.

Image below: this example shows sensor installed with a special fixing device to an air duct pipe.

Tightening torques
Use only tightening torques allowed in applicable standards of each thread size and material.

Installation of accessories

Pipe fittings = pipe clamps:
There are stainless steel (1.4401) pipe clamp (hose clamp) components available also as accessories.
Installation phases:

• Select a suitable clamp size according to the pipe diameter.
• Or select a separate, 1-meter long strap part, and cut it in pieces of suitable lengths. Separate clamp parts for the strap can be ordered according to the need. Insert a clamp part to one end of the band.
• Apply the strap around the pipe, leaving the sensor element tip under the strap.
• Tighten the strap by twisting the screw clockwise, to give a secure thermal connection between sensor and pipe surface.

The components available are:`

Product
number| Type| Strap length/width| Material|
---|---|---|---|---
915589| Pipe clamp| 16-27/12MM| 1.4401
1125786| Pipe clamp| 25-40/12MM| 1.4401
1125787| Pipe clamp| 32-50/9MM| 1.4401
1026077| Pipe clamp| 50-70/12MM| 1.4401
1228601| Pipe clamp| 70-90/12MM| 1.4401
5120444| Pipe clamp| 90-110/12MM| 1.4401
5120446| Pipe clamp| 110-130/12MM| 1.4401
5120448| Pipe clamp| 130-150/12MM| 1.4401
920556| Pipe strap| 1METER/12MM| 1.4401
920559| Pipe strap clamp|  12MM| 1.4401

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
• Pt500
• Pt1000| 1 mA
0,5 mA
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
Thermo material hot junction and protective tube / MI cable sheath are galvanically isolated from each other.

Grounded TC

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 non-Ex sensor type label.

www.epicsensors.com

Serial number information

Serial number S/N is always printed on type label in the following form: yymmdd-xxxxxxx-x:

▪ yymmdd
▪ -xxxxxxx
▪ -x| production date, e.g. “210131” = 31.1.2021
production order, e.g. “1234567”
sequential ID number within this production order, e.g. “1”
---|---

Ex e data (only for types with Ex e approval)
The Ex e cable sensor types, with RTD sensing element, are available with ATEX, IECEx, EAC Ex and KCs approvals. The approved types are special versions, with type designation WT-KAAPELI-…-EX. Special data for use in Ex e applications is given in certificates.

Ex e certificates and Ex markings

Type
Certificate number| Issued by| Applicable area| Marking
---|---|---|---
WT-KAAPELI-…-EX (non-bendable construction as standard type W-CABLE-…)
ATEX
EESF 18 ATEX 053X| Eurofins Expert Services
Oy, Finland, Notified Body
Nr 0537| Europe| Ex II 2G Ex e IIC T6…T3 Gb
Ex II 2D Ex tb IIIC
T60°C…T200°C Db
IECEx
IECEx EESF
18.0025X| Eurofins Expert Services
Oy, Finland, Notified Body
Nr 0537| Global| Ex e IIC T6…T3 Gb
Ex tb IIIC T60°C…T200°C Db
EAC Ex
№ ЕАЭС RU CFI.AA71.B.00130-19| Lenpromexpertiza OOO,
Russia| Eurasian Customs
Union (Belarus,
Kazakhstan, Russia)| 1 Ex e IIC T6…T3 Gb X
Ex tb IIIC T60°C..T200°C Db
X
KCs
19-KA4BO-0462X| KTL Korean Testing
Laboratory, South Korea| South Korea| Ex e IIC T6…T3

For certificate copies and special Ex e product data, please visit:
https://www.epicsensors.com/en/products/temperature-sensors/exe-extb- temperature-sensors/

Ex e type label

For ATEX, IECEx and KCs Ex e approved versions there is more information on the label, according to applicable standards. For these sensors, the manufacturer contact information is given on a separate label.
Image below: Example of an ATEX Ex e approved sensor type label.

www.epicsensors.com

For EAC Ex e approved sensor versions, exported to Eurasian Customs Union area, there is a special type label.
Image below: Example of an EAC Ex-approved sensor type label.

NOTE!
After Ex approval processes our code key digits have changed to shorter form. Below please find a comparison of the old and new designations of one product type as an example.

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 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 EESF
21.0027X| 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:

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.

www.epicsensors.com

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:

Street address
Postal address| Lapp Automaatio Oy
Martinkyläntie 52
FI-01720 Vantaa, Finland
---|---
Production site and logistics:
Street address
Postal address| Lapp Automaatio Oy
Varastokatu 10
FI-05800 Hyvinkää, Finland
Phone (sales)| +358 20 764 6410
Email| [email protected] 
Https| www.epicsensors.com 

Document history

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.

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.

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 14-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 111C-1135 °C Da/Db| 750 mW| -40…+40 °C
II 1D Ex is IIIC T135 °C Da
II 1/2D Ex ib IIIC T135 °C Da/Db| 650 mW| -40…+70 °C
II 1D Ex is IIIC T135 °C Da
II 1/2D Ex ib 111C-1135 °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 / VV]
---|---
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).
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.
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
User Manual – Type T-CABLE / W-CABLE

References

• Etusivu | EPIC® SENSORS
• Lapp Automaatio | Lapp Automaatio
• Frontpage | EPIC® SENSORS
• Frontpage | EPIC® SENSORS
• Lapp Automaatio | Lapp Automaatio
• Ex e / Ex tb Temperature sensors | EPIC® SENSORS

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