WIKA NS160 Betriebsanleitung Seite 12

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").
Instruments must be grounded via the process connection.
This is why electrically conductive sealing should be used at the process connection.
EN
Alternatively, take other measures for grounding. 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.
Flange connection
1) The screw connection of the flange must
not be opened
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 a suitable sealing material (EN 837-2).
The tightening 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 LH-RH union or
union nut should be used. When a blow-out device is fitted to a instrument, it must be
protected against being blocked by debris and dirt.
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.
Installation
Nominal position per EN 837-3 / 9.6.6 image 7: 90° ( ⊥ ), if not stated otherwise in the
„
order documentation.
Process connection lower mount
„
12
1)
Spanner flats
Sealing face

WIKA operating instructions pressure gauge, model 4 per ATEX
Installation with
open-ended
spanner
Sealing in the
thread
