WIKA 700.01.80 Betriebsanleitung Seite 9

6. Commissioning / 7. Optional extras / accessories
6.4 To check zero point
In general the zero point is checked and set in pressureless state.
The fastening of the measuring system lug on the back of the case has to be
slackened for zero point correction. Now the zero point can be readjusted by
moving the measuring system to the right or left. After this has been done the
GB
measuring system is to be secured again (max. tightening torque 2.5 Nm).
During the commissioning process pressure peaks must be absolutely avoided.
Open the shut-off valves slowly.
7. Optional extras / accessories
7.1 Panel mounting flange (only for model 700.01, see left picture)
The panel mounting flange may be retrofitted by the customer locally.
Alignment of the front ring (A) by means of the stamped cams to the grooves
found on the periphery of the case. Push front ring on the case until it snaps into
position.
7.2 Minimum or maximum drag pointer (see pictures)
The drag pointer (B) serves to monitor and control the minimum or maximum
occurring differential pressure.
7.3 Reed contact Model 851.3 and 851.3.3 (see pictures)
The Reed contacts may be retrofitted and adjusted by the customer locally.
Fastening is by means of two screws (D) integrated in the switch case (C)
with the pertinent inner thread in the display case.
D
C
C
A
D
B
B
WIKA Operating instructions pressure gauges Model 700.0X with 851 per ATEX 9