WIKA PGT23.100 Mode D'emploi page 16

5. Commissioning, operation
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
instrument on a suitable bracket.
EN
If this is not possible, the following limit values must not be exceeded:
Frequency range < 150 Hz
Acceleration < 0.5 g (5 m/s
Test connection
In specific applications (e.g. steam boilers) the shut-off devices must have a test connection,
so that the instrument can be tested without being dismounted.
Temperature load
The installation of the instrument should be made in such a way that the permissible
operating temperature, also considering the effects of convection and thermal radiation,
neither exceeds nor falls below the permissible limits. Thus the instrument and the shut-off
device must be protected by sufficiently long measuring lines or syphons.
The influence of temperature on the indication and measurement accuracy must be
observed.
WARNING!
The actual maximum surface temperature depends not on the equipment
itself, but mainly on the operating conditions. With gaseous substances, the
temperature may increase as a result of compression warming. In these cases
it may be necessary to throttle the rate of change of pressure or reduce the
permissible medium temperature.
Commissioning of pressure compensating valve
Instruments which are fitted with a pressure compensating
valve must, following installation, be vented for internal pressure
compensation.
Tool: Open-ended spanner SW 9
1. Remove plastic cap
2. Loosen the threaded connection above the valve body
3. Screw the valve body tight, turned through 180°, with ≤ 4.5 Nm
For information on the ingress protection, see Technical information IN 00.18
Protection of the pressure elements from overload
If the medium is subject to rapid changes in pressure, or pressure surges are expected, then
these must not act directly on the pressure element. The action of the pressure surges must
be dampened, for example with the fitting of a throttle section (reduction in cross-section in
the pressure port) or through the addition of an adjustable snubber.
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Pressure gauges with output signal, optionally for hazardous areas
Before commissioning
After commissioning