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5. Commissioning, operation
5.3 Zero point setting, if available
Setting range ±15° = ±4.5 % of the span
Example: Model 342.11.250
Pointer deviations caused by natural fluctuations in atmospheric
pressure and height differences can be compensated with the zero
point setting. Depressurise the instrument, then turn the adjustment
screw with the appropriate slotted screwdriver (see picture).
Turning the adjustment screw clockwise adjusts the scale
„
anticlockwise.
Turning the adjustment screw anticlockwise adjusts the scale
„
clockwise.
5.4 Commissioning, operation
Check the sealing at the process connection over the entire scale
„
range before commissioning.
Pressure surges must be avoided at all costs, open the shut-off
„
valves slowly.
After installation, open the vent valve (if available) or set from
„
CLOSE to OPEN. The version of the vent valve
depends on the model and can deviate from the
illustration shown! Observe the effects on the
ingress protection. For information on the ingress protection, see
technical information IN 00.18.
The instrument must not be subjected to any external loading (e.g.
„
use as a climbing aid, support for objects).
WIKA operating instructions, test gauge model 3
∧
Adjustment screw
EN
17
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