External Zero Point Setting (If Available); Permissible Ambient And Operating Temperatures - WIKA NS 100 Mode D'emploi

6. Commissioning, operation
6.4 External zero point setting (if available)
WARNING!
Spark generation as a potential ignition source
EN
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
hexagon nut on the rear of the instrument. For setting the hexagon nut, a
spanner with a spanner width of 7 mm is needed.
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.
26
Carry out the zero point setting using a simple spanner.
WIKA operating instructions pressure gauge, model 2 per ATEX