WIKA PGS23.160 - Manual (Page 12)

WIKA operating instructions pressure gauge model PGS with reed contacts
GB
12
14000322.01 03/2011 GB/D/F/E
Adjusting arm Set pointer
Adjustment lock
Removable
adjustment key
6. Commissioning, operation / 7. Contact protection ...
6.4 Adjusting the set pointers
The setting of the set points is achieved using the adjustment lock in the
window with the aid of the adjustment key (part of the scope of delivery;
found in standard instruments on the side of the terminal box).
With nominal size 160 measuring instruments it has to be ensured that
the adjusting arm is pushed down exclusively in the area of the set
pointer to be adjusted. Otherwise damage to the instrument pointer or a
misadjustment of the zero point cannot be excluded.
The set pointers of the limit switches are freely adjustable between 10 %
and 90 % of the scale range; the distance between the two set pointers
is approx. 10 % of the scale range (corresponds to approx. 30 ∢°).
Commissioning
During the commissioning process pressure surges must be avoided at
all costs. Open the shut-off valves slowly.
7. Contact protection measures
Mechanical contacts must not exceed the specified electrical values for
switching current and switching voltage independent of each other, not
even for a short time only.
For capacitive or inductive loads we recommend one of the following
protective circuits: