WIKA TR Serie Información Adicional página 10

3. Commissioning, operation
3.2.1 Electrical connection values
Supply and signal circuit parameters, ambient temperatures
Electrical data without built-in transmitter or digital display
■
For devices of group II the following maximum connection values in the sensor circuit
EN
apply:
Sensor circuit
U = DC 10 V
max
I = 9 mA
max
P (at the sensor) = 15 mW
max
For the use of multiple sensors and simultaneous operation the summation of all single
power dissipation may not exceed the maximum permissible power dissipation. The
maximum permissible power shall be limited to 15 mW.
Electrical data with built-in transmitter or digital display
■
For the sensor circuit the above specified values corresponding to the equipment apply.
The used transmitter/digital display shall be provided with their own certification in
accordance with IEC/EN. The installation conditions and the electrical connection
values shall be taken from the correponding certification and shall be considered.
Multipoint thermocouples built up from individual sheathed elements, model TC95
■
For the individual ungrounded sheathed element, the values mentioned in 3.2.1 apply
(not allowed in zone 1).
3.3 Temperature carry-over from the process
Prevent any heat reflux from the process!
Observe the special conditions (see chapter 4 "Special conditions of use (X conditions)",
point 5).
10 WIKA additional information, models TRxx and TCxx (Ex nA, Ex ec, Ex eb, Ex tc, Ex tb)