Commissioning, Operation; Mechanical Connection - WIKA DELTA-plus DPG40 Betriebsanleitung

6. Commissioning, operation

6. Commissioning, operation

6.1 Mechanical connection

In accordance with the general technical regulations for pressure gauges
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(e.g. EN 837-2 "Selection and installation recommendations for pressure
EN
gauges").
Mounting of the pressure connections according to affixed symbols,
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⊕ high pressure, ⊖ low pressure
Mounting by means of:
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- rigid measuring line or
- wall mounting with available mounting links
Process connections 2 x G 1/4 female thread, lower mount, in-line, centre
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distance 26 mm, operating position NL 90 (nominal position) per DIN 16257
(i.e. vertical dial), design the threads of the connection shanks preferably in
accordance with EN 837-3 (section 7.3.2).
Prior to the installation of the instrument, clean the measuring lines thoroughly
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by tapping and blowing or flushing.
Protect measuring instruments from contamination and high temperature
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fluctuations!
The instrument must be mounted free from vibration and should be aligned
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so that it is easy to read. It is recommended that a shut-off device is placed
between the pressure tapping and the instrument, which will enable the repla-
cement of the instrument and a zero point check while the plant is running. The
instruments should be protected against coarse dirt and wide fluctuations in
ambient temperature.
For sealing the connections, use flat gaskets, lens-type sealing rings or WIKA
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profile sealings. In order to orientate the instrument so that the local indication
can be read as well as possible, a connection with LH-RH adjusting nut or
union nut should be used. When screwing on and unscrewing the instruments
they should not be gripped by the case, but rather only on the spanner flats of
the connecting nozzle!
16 WIKA operating instructions DELTA-plus, DELTA-comb and DELTA-switch