WIKA TGT73 - Manual (Page 6)

GB
14028755.02 08/2012 GB/D/F/E
6 WIKA operating instructions model TGT73
2. Safety
WARNING!
Before installation, commissioning and operation, ensure
that the appropriate gas-actuated thermometer has been
selected in terms of measuring range, design and specific
measuring conditions. The compatibility of the wetted
parts of the process connection (thermowell, stem etc.)
with the medium must be tested.
Non-observance can result in serious injury and/or
damage to the equipment.
WARNING!
This is protection class 3 equipment for connection at low
voltages, which are separated from the power supply or
voltage by greater than AC 50 V or DC 120 V. Preferably,
a connection to an SELV or PELV circuit is recommended;
alternatively protective measures from HD 60346-4-41
(DIN VDE 0100-410).
Alternatively for North America:
The connection can be made in line with "Class 2
Circuits" or "Class 2 Power Units" in accordance with CEC
(Canadian Electrical Code) or NEC (National Electrical
Code).
Further important safety instructions can be found in the
individual chapters of these operating instructions.
2.1 Intended use
The gas-actuated thermometer is mainly used in the process industry
to monitor and control process temperatures.
The instrument has been designed and built solely for the intended
use described here, and may only be used accordingly.
2. Safety