WIKA GCS-1 Betriebsanleitung Seite 7

2. Safety
2.3 Additional safety instructions for gas cylinder scale per ATEX
WARNING!
Non-observance of these instructions and their contents may result in
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the loss of explosion protection.
For operation in hazardous areas, the lower voltage levels apply, as
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per chapter "3. Specifications".
Actions or alterations to the gas cylinder scale, which are not described in these
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operating instructions, are not permitted.
If faults cannot be eliminated, the instrument must be taken out of operation and
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prevented from being accidentally put back into service.
Always operate the instrument within its overload limits.
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Observe the working conditions in accordance with chapter "3. Specifications".
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The cable shield should be earthed at one end, and preferably in the non-hazardous
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area (EN 60079-14). For instruments with a cable outlet, the cable shield is
connected to the case. Additional connection of the shield is then only permitted if
any accidental energisation between the shield connection (e.g. at the power supply)
and the case can be avoided (see EN 60079-14).
Power the GCS-1-A gas cylinder scale variant, with marking "Ex nL IIC T4", by an
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energy-limited 4 ... 20 mA current loop.
Connect the gas cylinder scale with marking "Ex nA IIC T4" to a power and signal
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circuit with transient protection in accordance with EN 60079-15, chapter 23 C.
Disconnect a gas cylinder scale with the marking Ex nA, or when it is operated under
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nA conditions, only after the power has been turned off.
Both the internal capacitance and inductance must be considered
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Flying leads with bare ends must be finished with ferrule ends (cable preparation)
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Provide equipotential bonding between the earth at the voltage supply and the gas
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cylinder and/or the installation, in case they are connected conductively.
WIKA operating instructions gas cylinder scale model GCS-1
GB
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