WIKA Cryo Gauge 712.15.100 Betriebsanleitung Seite 9

7. Transmitter for level measurement
Electrical zero point (without option BCD switch)
If the mechanical zero point is changed by means of the
adjustable pointer, the electrical zero point must be reset to
the mechanical zero point.
First depressurise the pressure gauge.
Loosen the complete cable hood on the right-hand side of
the pressure gauge by completely unscrewing the screw
on the top of the cable hood cover
screwdriver (0.6 x 3.5 mm).
Extract the screw. Remove the cable hood
socket insert from the cable socket base

separate the pressure gauge from the power supply.
Remove the cable hood cover
and push the socket insert
entire cable hood

Use a short stranded wire with bare points at both ends
(max. permissible resistance 30 Ω) to bridge contacts 5 and
6 on the socket insert.
Reassemble the plug in reverse order. Place the plug, with
the attached piece of stranded wire, onto the pin insert
and thus reestablish the power supply.
Within a max. 30 seconds the new zero point will be stored
within the electronics. During this period, the current in the
loop will increase to 9.5 mA.
The new zero point also remains stored in the case of a
power failure.
Loosen the plug again in the same sequence as descri-
bed above and remove the piece of stranded wire. After
reassembling the plug, the electrical output signal will once
more correspond to the indication of the mechanical pointer.
Ensure the seals
securely reinstalled to maintain the
protection class.
WIKA operating instructions differential pressure gauge models 712.15.100, 732.15.100
using an appropriate

from the cable hood

out downwards through the

.
are properly and


with the

and thus


,








 Screw
 Cable hood cover
 Cable hood
 Socket insert
 Cable socket base
 Seals
GB
9