WIKA DPGT40 - Manual (Page 13)

GB
WIKA operating instructions differential pressure transmitter, model DPGT40 13
14093267.01 03/2014 GB/D/F/E
6. Commissioning, operation
6. Commissioning, operation
6.1 Mechanical connection
■ In accordance with the general technical regulations for pressure gauges (e.g.
EN 837-2 “Selection and installation recommendations for pressure gauges”).
■ Mounting of the pressure connections according to affixed symbols, ⊕ high
pressure, ⊖ low pressure
■ Mounting by means of:
- rigid measuring line or
- wall mounting with available mounting links
■ Process connections 2 x G 1/4 female, lower mount (LM), in-line, centre
distance 26 mm, operating position NL 90 (nominal position) per DIN 16257
(i.e. vertical dial), design the threads of the pressure connection in accordance
with EN 837-3 (section 7.3.2).
■ Prior to the installation of the pressure gauge, clean the measuring lines
thoroughly by tapping and blowing or rinsing
■ Protect measuring instruments from contamination and high temperature
changes!
■ The pressure gauge must be mounted free from vibration and should be
aligned so that it is easy to read. It is recommended that an isolation device is
interposed between the pressure tapping point and the pressure gauge, which
will enable the replacement of the pressure gauge and a zero point check while
the plant is running. The instruments should be protected against coarse dirt
and wide fluctuations in ambient temperature.
■ Correct sealing of the connections must be made using suitable flat gaskets,
sealing rings or WIKA profile sealings. In order to orientate the gauge so that
the on-site display can be read as well as possible, a clamp socket or union nut
should be used. When screwing on and unscrewing the pressure gauges they
should not be gripped by the case, but rather only on the spanner flats of the
connection!
Wall mounting
Mounting using three integrally cast mounting lugs