11377551.05 06/2012 GB/D/F/E
WIKA operating instructions models TR30, TR31
11
GB
3.2 Resistance thermometer model TR31
Output signal Pt100, model TR31-P
Temperature range
Measuring range without neck tube -50 ... +150 °C,
with neck tube -50 ... +250 °C
Measuring element
Pt100 (measuring current: 0.1 ... 1.0 mA)
Connection method
3-wire
4-wire
Sensor tolerance value
1)
per DIN EN 60751
Class B
Class A
Output signal 4 ... 20 mA, model TR31-W
Temperature range
Measuring range without neck tube -50 ... +150 °C,
with neck tube -50 ... +250 °C
2)
Measuring element
Pt100 (measuring current: approx. 0.5 mA)
Connection method
3-wire
Sensor tolerance value
1) 3)
per DIN EN 60751
Class B
Class A
Measuring span
minimum 20 K, maximum 300 K
Basic configuration
Measuring range 0 ... 150 °C, other measuring ranges are adjustable
Analogue output
4 ... 20 mA, 2-wire
Measuring deviation
per DIN EN 60770, 23 °C ± 5 K
0.2 % (Transmitter)
3)
Linearisation
linear with temperature per DIN EN 60751
Linearisation error
±0.1 %
4)
Switch-on delay, electrical
< 10 ms
Signalling of sensor burnout
configurable: NAMUR downscale < 3.6 mA (typically 3 mA)
NAMUR upscale > 21.0 mA (typically 23 mA)
Sensor short-circuit
not configurable, generally NAMUR downscale < 3.6 mA (typ. 3 mA)
Load R
A
R
A
≤ (U
B
- 9 V) / 0.023 A with R
A
in Ω and U
B
in V
Effect of load
± 0.05 % / 100 Ω
Power supply
DC 10 ... 35 V
Max. permissible residual ripple
10 % at 24 V / maximum 300 Ω Load
Power supply input
protected against reverse polarity
Power supply effect
± 0.025 % / V
Electromagnetic compatibility
(EMC)
2004/108/EC, EN 61326 emission (Group 1, Class B) and interference
immunity (industrial application)
5)
Temperature units
configurable °C, °F, K
Info data
TAG No., descriptor and message can be stored in transmitter
Configuration and calibration data
permanently stored in EEPROM
Electrical connection
M12 x 1, 4-pin circular connector
Readings in % refer to the measuring span
For a correct determination of the overall measuring error, both sensor and transmitter measuring deviations have to be
considered.
1) For detailed specifications for Pt100 sensors, see Technical Information IN 00.17 at www.wika.com.
2) The temperature transmitter should therefore be protected from temperatures over 85 °C
3) For measuring spans smaller than 50 K additional 0.1 K
4) ±0.2 % for measuring ranges with a lower limit less than 0 °C
5) Use resistance thermometers with shielded cable, and ground the shield on at least one end of the lead, if the cables are longer than
30 m or leave the building.
3. Specifications
