Temperature penetration sensor with heating element
TRK277-ESF-H_Vx.x_PI_2021-10_EN 1
Subject to technical changes
TRK277/ESF-H
1 TRK277/ESF-H
Temperature penetration sensor with heating element
Fig. 1: Front view
1.1 Features
• Metal tip with 1.5m connection cable and wire connection
• Lancet sensor with 150mm length, 4mm in diameter, engraved scale and plastic grip
• Heating element 12V
• Suitable for contact with food
Temperature penetration sensor with heating element
2 TRK277-ESF-H_Vx.x_PI_2021-10_EN
Subject to technical changes
TRK277/ESF-H
1.2 Safety instructions
Writing conventions
CAUTION
• Avoid the described hazard, otherwise there is risk of minor or medium bodily injury or property
damage.
WARNING
• Avoid the described hazard: Otherwise there is danger from electric voltage that can lead to
death or serious bodily injury.
For your safety
For safe operation and to avoid personal injury and equipment damage through operator error, always
read these instructions, become familiar with the device, and follow all safety instructions on the prod-
uct and in this document, as well as the safety guidelines of Wurm GmbH & Co. KG Elektronische
Systeme. Keep these instructions ready to hand for quick reference and pass them on with the device
if the product is sold. Wurm GmbH & Co. KG Elektronische Systeme accepts no liability in case of
improper use or use for other than the intended purpose.
WARNING
DANGER TO LIFE FROM ELECTRIC SHOCK AND/OR FIRE!
• Switch off the power to the entire plant when carrying out installation, wiring or removal work.
Otherwise a mains voltage and/or external voltage may still be present even if the control voltage
is switched off.
• Only qualified electricians are permitted to wire the device.
• Use only the correct tools for all work.
• Check all wiring after connection.
• Take note of the maximum loads on all connections.
• Take the device out of operation if it is faulty or damaged and is therefore compromising safe
operation.
• Do not open the device.
• Do not repair the device yourself. If the device requires repairs, send it in with an exact descrip-
tion of the fault.
CAUTION
DAMAGE TO THE DEVICE IF HANDLED INCORRECTLY!
• Please pay attention to sharp edges when laying the sensor cable. Damage to the cable insula-
tion can result in leakage and therefore water penetration, thus causing incorrect measurements.
• Avoid pulling forces on the sensor sleeve. Pulling forces can result in leakage and therefore
water penetration, thus causing incorrect measurements.
Target group This manual is intended for "service technician" personnel.
Intended use The TRK277/EFS-H is a universal temperature penetration sensor with
heating element and high measuring accuracy
Temperature penetration sensor with heating element
TRK277-ESF-H_Vx.x_PI_2021-10_EN 3
Subject to technical changes
TRK277/ESF-H
Validity of the documentation
Any software versions not listed are special solutions for individual projects and are not described in detail in this
document. This document automatically ceases to be valid if a new technical description is issued.
Manufacturer: Wurm GmbH & Co. KG Elektronische Systeme, Morsbachtalstraße 30, D-42857 Remscheid
You can find more information on our website at www.wurm.de.
1.3 Connection diagram
Fig. 2: Connection diagram and dimensions in mm
You can use the following cables for the sensor extension:
Date
2021-10 Documentation status
Pos. Colour Assignment
1White Temperature sensor
2White Temperature sensor
3Red Heating element
4Red Heating element
Cable length Cross section
Up to 100m 0.75mm²
Up to 400m 1.5mm²
1
2
3
4
100 1500 40
150 17,5
Æ 4
Temperature penetration sensor with heating element
4 TRK277-ESF-H_Vx.x_PI_2021-10_EN
Subject to technical changes
TRK277/ESF-H
1.4 Characteristics curve
1.5 Technical data
NOTICE
• Please also observe the technical documentation of the measurement or control electronics
used.
• To calibrate the measured section, please refer to the instructions in the documentation for the
device.
TRTRTRTR
°C °C °C °C
-40 19673 -35 14748 -30 11161 -25 8524
-20 6567 -15 5101 -10 3995 -5 3152
0 2505 5 2005 10 1615 15 1310
20 1069 25 877
Ambient temperature Operation: -40...+65°C, storage: -40...+70°C
Measurement cell NTC resistor
Measuring precision Better than
±0.5K at -20°C, corresponding to 6567Ω
±0.2K at 0°C, corresponding to 2505Ω
±0.5K at 15°C, corresponding to 1310Ω
Insulation 100MOhm@100VDC
Heating element 12V=, R = 6W
Dimensions Lancet sensor: 150mm length, 4mm
Degree of protection IP67
Weight 57g
Standards met - Directive (EU) No 10/2011
- Directive (EC) No 1935/2004
- Regulation (EG) No 2023/2006
RoHS II
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