WIKA NS100 Manual De Instrucciones página 12

6. Commissioning, operation
Installation
Nominal position per EN 837-3 / 9.6.6 figure 7: 90° ( ⊥ )
„
Process connection lower mount
„
EN
With filled versions the vent valve at the top of the case must be opened before
„
commissioning!
For outdoor applications, the selected installation location has to be suitable
„
for the specified ingress protection, so that the pressure gauge 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!
In order to ensure that pressure can be safely and reliably vented on the rear, a
„
distance of at least 20 mm must be left free behind the case!
Permissible ambient and operating temperatures
When mounting the pressure gauge it must be ensured that, taking into consider-
ation the influence of convection and heat radiation, no deviation above or below
the permissible ambient and medium temperatures can occur. The influence of
temperature on the indication 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 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
Level check
For filled instruments, the level must be checked on a regular basis.
The liquid level must not drop below 75 % of the instrument diameter.
Commissioning
During the commissioning process pressure surges must be avoided at all costs.
Open the shut-off valves slowly.
12
)
2
WIKA operating instructions pressure gauge, model 4 per ATEX