External Zero Point Setting (If Available); Permissible Ambient And Operating Temperatures - WIKA 632.50 Serie Betriebsanleitung

6. Commissioning, operation
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, instruments with blow-out device or blow-out back must keep
EN
a minimum distance of 20 mm from each object.
6.4 External zero point setting (if available)
WARNING!
Spark generation as a potential ignition source
The zero point setting must not be carried out using powered
tools.
Very fast turning of the setting mechanism can lead to
frictional heat and spark generation.
▶
If there is a deviation of the pointer from the zero point (in depressurised
condition), a zero point setting can be carried out through turning the
slotted screw on the front of the instrument. For setting the slotted screw,
a size 1 slotted screwdriver is required.
The setting range of the pointer is ±25°.

6.5 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 media temperatures
can occur. The influence of temperature on the indication accuracy must
be observed.
22
Carry out the zero point setting using a simple slotted
screwdriver
Operating instructions capsule pressure gauge, model 63x.50 per ATEX