WIKA TR10-L Manual De Instrucciones página 23

5. Commissioning and operation
For fitting, the permitted thread gaps for electrical equipment for gas hazardous areas
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are contained in IEC/EN 60079-1. Thread gap
mm [0.2 in] for case volumes < 100 cm³ and ≥ 8 mm [0.32 in] for housing volumes >
100 cm³. There must be ≥ 5 threads engaged.
Thread gap 1) for tapered threads
There must be ≥ 3.5 threads engaged. These specifications for thread gaps must be
adhered to, without fail, when fitting and during operation.
The direct threaded connection of the thermometer to the connection head or case
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must not be twisted or opened. Any alignment of the case may only be made using
the optional "nipple-union-nipple" neck tube.
The temperature resistance of the connection lead must match the permissible
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operating temperature of the cases.
For ambient temperatures above 60 °C [140 °F], heat-resistant connection leads
must be used.
No batteries may be built in to the flameproof enclosure.
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No capacitor may be fitted within the flameproof enclosure that has a residual energy
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of ≥ 0.02 mJ at the end of the time required to open the housing. The case must not
be opened during operation. After the operating voltage has been switched off, a
waiting time of 2 minutes must be observed before opening the case.
Mounting within metal vessels:
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The case must be grounded against electromagnetic fields and electrostatic charge.
It does not need to be connected separately to the equipotential bonding system. It is
sufficient if the metal protection tube 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.
Mounting within non-metal 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
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delivery of the instruments.
WIKA operating instructions, models TR10-L, TC10-L, TR10-0, TC10-0 (Ex d)
for parallel threads
1)
2) , must have ≥ 5 available threads on each part.
, must be ≥ 5
2)
EN
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