WIKA 233.50 - Manual (Page 14)

GB
2080268.06 02/2013 GB/D/F/E
WIKA operating instructions pressure gauge, model 2 per ATEX 14
Permissible ambient and operating temperatures
When mounting the pressure gauge it must be ensured that, taking into
consideration the influence of convection and heat radiation, no devia-
tion above or below the permissible ambient and medium temperatures
can occur. The influence of temperature on the display accuracy must
be observed.
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 by installing a flexible connection line between the measuring
point and the pressure gauge and mounting the instrument on a suita-
ble bracket.
If this is not possible, the following limit values must not be exceeded:
Dry gauges: Frequency range < 150 Hz
(Model 232/262) Acceleration < 0.7 g (7 m/s 2 )
Liquid-filled gauges: Frequency range < 150 Hz
(Model 233/263) Acceleration < 4 g (40 m/s 2 )
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 surges must be avoided at
all costs. Open the shut-off valves slowly.
6. Commissioning, operation