WIKA TR31 - Handbuch (Seite 11)

GB
WIKA operating instructions models TR31-3, TR31-K
14096788.01 07/2014 GB/D
11
Current signal for fault signal Configurable in accordance with
NAMUR NE43
downscale ≤ 3.6 mA
upscale ≥ 21.0 mA
Sensor short-circuit Not configurable, in accordance with
NAMUR NE43 downscale ≤ 3.6 mA
Sensor current < 0.3 mA (Self-heating can be neglected.)
Load R
A
R
A
≤ (U
B
- 10 V) / 23 mA with R
A
in Ω
and U
B
in V
Effect of load ±0.05 % / 100 Ω
Power supply U
B
DC 10 ... 30 V
Max. permissible residual ripple 10 % generated by U
B
< 3 % ripple of
the output current
Power supply input Protected against reverse polarity
Power supply effect (depending
on the power supply)
±0.025 % / V
Influence of the ambient
temperature
0,1 % of the span / 10 K T
amb
Electromagnetic compatibility
(EMC) 6)
2004/108/EC, EN 61326 emission
(group 1, class B) and interference
immunity (industrial application) 5) ,
configuration at 20 % of the full
measuring range
Temperature units configurable °C, °F, K
Info data TAG No., descriptor and user message
can be stored in transmitter
Configuration and calibration data Permanently stored
Electrical connection ■ M12 x 1, 4-pin circular connector
■ Directly connected cable
Readings in % refer to the measuring span
For a correct determination of the overall measuring deviation, both sensor and transmitter
measuring deviations have to be considered.
1) The temperature transmitter should therefore be protected from temperatures over 85 °C (185 °F).
2) Version with mineral-insulated sheathed cable can be used up to 300 °C (572 °F).
3) Class accuracy A only valid in the temperature range -30 ... +150 °C (-22 ... +302 °F) or
-30 ...+250 °C (-22 ... +482 °F), otherwise class B
4) ±0.2 % for measuring ranges with a lower limit less than 0 °C (32 °F)
5) Use resistance thermometers with shielded cable and ground the shield at at least one end
of the lead if the lines are longer than 30 m or leave the building. Operate the instrument in a
grounded state.
6) During interference consider an increased measuring deviation of up to 2 %.
3. Specifications