WIKA TR10-C - Handbuch (Seite 26)

14106886.01 06/2014 GB/D
26 WIKA operating instructions resistance thermometers and thermocouples, Ex n
GB
8. Electrical connection values
8.1 Electrical data without built-in transmitter or digital display
Power and signal circuit
U
max
= 30 V
I
max
= 9 mA
P
max
= 15 mW
Marking II 3G Ex nA IIC T1…T6 Gc X
II 3D Ex tc IIIC T440°C …T80°C Dc X
8.2 Electrical data for built-in transmitters or digital displays
Power and signal circuit
U
max
= 40 V
The transmitter used must be certified
and confirmed to EN 60079-15.
I
max
= 150 mA
P
max
= 1,000 mW
Sensor current loop
I
max
= 9 mA
P
max
= 15 mW
Marking II 3G Ex nA IIC T1…T6 Gc X
II 3D Ex tc IIIC T440°C …T80°C Dc X
The transmitters and digital displays used must have their own certification in accordance
with EN/IEC. The installation conditions and electrical connection values can be seen from the
relevant approvals and must be observed.
9. Maintenance and cleaning
9.1 Maintenance
This thermometer is maintenance-free.
Repairs must only be carried out by the manufacturer.
9.2 Cleaning
CAUTION!
■ Clean the instrument with a moist cloth.
■ Electrical connections must not come into contact with moisture.
■ Wash or clean the dismounted instrument before returning it, in order to protect
personnel and the environment from exposure to residual media.
■ Residual media in dismounted instruments can result in a risk to persons, the
environment and equipment. Take sufficient precautionary measures.
For information on returning the instrument see chapter 11.2 “Return”.
8. Electrical connection values / 9. Maintenance and cleaning