WIKA A-10 - Manual (Page 18)

18 WIKA operating instructions pressure transmitter model A-10
11218720.10 01/2012 GB/D/F/E
GB
Types of sealing
Correct sealing of the process connections with parallel threads at the sealing face  must be made
using suitable flat gaskets, sealing rings or WIKA profile sealings.
The sealing of tapered threads (e.g. NPT threads) is made by providing the thread with additional
sealing material such as, for example, PTFE tape (EN 837-2).
For further information on seals see WIKA data sheet AC 09.08 or under www.wika.com.
Making the electrical connection
■ The instrument must be earthed via the process connection!
■ The power supply for the pressure transmitter must be made via an energy-limited electrical circuit
in accordance with section 9.3 of UL/EN/IEC 61010-1, or an LPS to UL/EN/IEC 60950-1, or class 2
in accordance with UL1310/UL1585 (NEC or CEC). The power supply must be suitable for operation
above 2,000 m should the pressure transmitter be used at this altitude.
■ Select a cable diameter that matches the cable gland of the plug. Make sure that the cable gland of
the mounted plug has a tight fit and that the seals are present and undamaged. Tighten the threaded
connection and check that the seal is correctly seated, in order to ensure a tight seal.
■ For cable outlets, make sure that no moisture enters at the cable end.
6. Commissioning, operation
Parallel thread Tapered thread
per EN 837 per DIN 3852-E NPT, R and PT
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