Commissioning, Operation - WIKA NS100 Betriebsanleitung

6. Commissioning, operation

6. Commissioning, operation
Mechanical connection
In accordance with the general technical regulations for pressure gauges (e.g.
EN 837-2 "Selection and installation recommendations for pressure gauges").
Pressure gauges must be grounded via the process connection.
When screwing the instruments in, the force required for sealing must not be
applied through the case, but only through the spanner flats provided for this
purpose, and using a suitable tool. The sealings used at the process connection
Flange connection
1) The screw connection of the flange must
not be opened
must be electrically conductive.
For parallel threads, use flat gaskets, lens-type sealing rings or WIKA profile
sealings at the sealing face . With tapered threads (e.g. NPT threads), sealing is
made in the threads  using suitable sealing material (EN 837-2).
Spanner flats
Sealing face
The torque depends on the sealing used. In order to orientate the measuring
instrument so that it can be read as well as possible, a connection with clamp
socket or union nut should be used. When a blow-out device is fitted to a pressure
gauge, it must be protected against being blocked by debris and dirt.
With safety pressure gauges (see k) ensure that the free space behind the
blow-out back is at least 15 mm.
Requirements for the installation point
If the line to the measuring instrument is not adequately stable, an instrument
mounting bracket should be used for fastening. If vibrations cannot be avoided
by means of suitable installation, instruments with liquid filling should be used.
The instruments should be protected against coarse dirt and wide fluctuations in
ambient temperature.
WIKA operating instructions pressure gauge, model 4 per ATEX
1)

Sealing in the
thread

Installation with
open-ended
spanner
11
EN