WIKA PGT23.1 0 Serie, PGT26.1 08 Serie Betriebsanleitung Seite 15

5. Commissioning, operation
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 an instrument, it must be
protected against being blocked by debris and dirt.
Installation
Nominal position per EN 837-3 / 9.6.6 figure 7: 90° ( ⊥ )
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Process connection lower mount
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With filled versions the vent valve at the top of the case must be opened before commis-
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sioning!
For outdoor applications, the selected installation location has to be suitable for the
„
specified ingress protection, so that the instrument is not exposed to impermissible
weather conditions.
In order to avoid any additional heating, the instruments must not be exposed to direct
„
solar irradiation while in operation!
To ensure that the pressure can be safely vented in the case of failure, due to the
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blow-out back, a minimum distance of 20 mm from any object must be maintained.
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, filled instruments should be used. The instruments should be protected against
coarse dirt and wide fluctuations in ambient temperature.
Permissible vibration load at the installation site
The instruments should always be installed in locations free from vibration. If necessary,
it is possible to isolate the instrument from the mounting point, e.g. by installing a flexible
connection line between the measuring point and the instrument and mounting the instru-
ment on a suitable bracket.
If this is not possible, the following limit values must not be exceeded:
Frequency range < 150 Hz
Acceleration < 0.5 g (5 m/s
Pressure gauges with output signal, optionally for hazardous areas
Spanner flats
Sealing face
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)
2
Sealing in the thread
EN
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15