WIKA TR10-W Betriebsanleitung Seite 17

7. Information on mounting and operation in hazardous areas
When using a transmitter/digital display, note and follow:
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- 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 certified flameproof thermometers should only be fitted to housing- or connection
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heads certified with a "flameproof" ignition protection type.
Certified and listed field cases (variant 3) should only be fitted and installed by a
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specialist trained to the latest technology.
For fitting, the permitted flameproof joints for electrical equipment for gas hazardous
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areas are contained in EN/IEC 60079-1. Flameproof joints (section 5.3) for parallel
threads (in accordance with table 3), must be ≥ 5 mm for housing volumes < 100 cm³
and ≥ 8 mm for housing volumes > 100 cm³. There must be ≥ 5 threads engaged.
Flameprooof joints (section 5.3) for tapered threads (in accordance with table 3), must
have ≥ 5 available threads on each part. There must be ≥ 3.5 threads engaged.
These specifications for flameproof joints must be adhered to, without fail, when fitting
and during operation.
The direct threaded connection of the thermometer to the connection head or housing
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must not be twisted or opened. Any alignment of the housing may only be made using
the optional "nipple-union-nipple" neck tube.
The temperature resistance of the connecting cable must match the permissible
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operating temperature of the housing.
For ambient temperatures above 60 °C, heat-resistant connecting cable must be used.
No batteries may be built in to the flameproof housing.
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No capacitor may be fitted within the flameproof housing that has a residual energy of
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≥ 0.02 mJ at the end of the time required to open the housing. The housing must not be
opened during operation. After the power supply has been switched off, a waiting time of
2 minutes must be observed before opening the housing.
Mounting within metallic enclosures:
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The housing 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 metallic thermowell has a solid and secured contact with the
metallic vessel or its structural components or pipelines, so long as these components
are connected to the equipotential bonding system.
Fitting in non-metallic vessels:
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All electrically-conductive thermometer components within the hazardous area must be
provided with equipotential bonding.
Neither repairs nor structural modifications are permitted, and any would void the
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guarantee and the respective certification.
The manufacturer shall not be responsible for constructional modifications after delivery
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of the instruments.
WIKA operating instructions models TR10-W, TC10-W (Ex d)
GB
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