WIKA operating instructions models TR10-0, TC10-0 (FM, CSA)
14503941.01 11/2021 EN/DE/FR/ES
13
EN
6. Information on mounting and operation in hazardous areas
WARNING!
Non-observance of these instructions and their contents may result in the loss
of explosion protection.
The requirements of CSA and FM must be followed. Additionally the
specifications of the respective national regulations concerning usage (e.g.
CEC and NEC) apply.
■
The responsibility for area classification lies with the plant operator and not the
manufacturer/supplier of the equipment.
■
The plant operator guarantees, and is solely responsible, that all thermometers in use
are identifiable with respect to all safety-relevant characteristics. Damaged thermometers
may not be used.
■
For the installation of the thermometer, only components (e.g. cables, cable glands, etc.)
permitted for “flameproof” may be used.
■
For earthing the conductive screen, follow the specifications of CEC or NEC.
■
When using a transmitter/digital display, note and follow:
- The contents of these operating instructions and those of the transmitter/digital display
- The relevant regulations for installation and use of electrical systems
- The regulation and guidelines regarding explosion protection
■
The flameproof thermometers should only be fitted to certified enclosure or connection
heads certified with a “flameproof” ignition protection type.
■
For fitting, the permitted flameproof joints for electrical equipment for gas hazardous
areas are contained in CSA C22.2 No. 30, CSA 60079-1 and FM 3615.
■
The direct threaded connection of the thermometer to the connection head or enclosure
must not be twisted or opened. Any alignment of the enclosure may only be made using
the optional “nipple-union-nipple” neck tube.
■
The temperature resistance of the connection cable must match the permissible
operating temperature of the enclosure. For ambient temperatures above 60 °C [140 °F],
heat-resistant connection cable must be used.
■
No batteries may be built in to the flameproof enclosure.
■
No capacitor may be fitted within the flameproof enclosure
. The enclosure must not be
opened during operation. After the supply voltage has been switched off, a waiting time of
2 minutes must be observed before the enclosure is opened.
■
Mounting within metal enclosures:
The enclosure must be grounded against electromagnetic fields and electrostatic
discharge. It does not have to be connected separately to the equipotential bonding
system. It is sufficient if the metal thermowell has a solid and secured contact with the
metal vessel or its structural components or pipelines, so long as these components are
connected to the equipotential bonding system.
6. Information on mounting and operation in hazardous areas
