WIKA Typ 4 Betriebsanleitung Seite 13

7. Commissioning, operation
Installation
In order to ensure that with both models 43X.30 and 43X.36 pressure can

be safely and reliably vented through the case back, a distance of at least
5 mm must be left free behind the case!
After installation, instruments with liquid filling must be operated in a vented

condition by turning the pressure equalising valve.
In order to avoid any additional heating, the instruments must not be exposed

to direct solar irradiation while in operation!
Admissible ambient and working temperatures
When installing the pressure gauge it has to be ensured that, taking the influ-
ence of convection and heat radiation into consideration, no upper or lower
deviation from the permissible ambient and medium temperatures can occur.
The influence of temperature on the class accuracy is to be observed.
Permissible vibration load at the mounting point
The instruments should always be installed in locations free from vibration.

If necessary, it is possible to isolate the instrument from the mounting point

by installing a flexible connection line between the measuring point and the
pressure gauge and mounting the instrument on a suitable bracket.
If this is not possible, the following limit values must not be exceeded:

Dry gauges:
(Model 43)
Liquid-filled gauges:
(Model 433)
The liquid filling must be checked on a regular basis.
The liquid level must not drop below 75 % of the gauge diameter.
Commissioning
During the commissioning process pressure peaks must be avoided at all costs.
Open the shut-off valves slowly.
WIKA Operating instructions pressure gauges Model 4 with 831 per ATEX
Frequency range < 150 Hz
Acceleration < 0.7 g (7 m/s
Frequency range < 150 Hz
Acceleration < 4 g (40 m/s
 )
 )
GB
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