Adjustment Of Zero Point / Span; Maintenance, Accessories; Trouble Shooting - WIKA F-20 Betriebsanleitung

8. Adjustment of zero point / span

Adjustment of zero point / span
We do not recommend to adjust the span potentiometer. It is used for adjustment ex
factory and should not be adjusted by you unless you have adequate calibration equip-
ment at your disposal (at least three times more accurate than the instrument being
tested).
„ Make sure wires are not cut or pinche
during disassembly and reassembly of
the connectorOpen the pressure trans-
mitter by twisting off the field case over.
Adjust the zero point (Z) by generating
„
the lower limit of the pressure range.
Adjust the span (S) by generating the
„
higher limit of the pressure range.
Check the zero point.
„
If the zero point is incorrect, repeat
„
procedure as required.
Reassemble the instrument carefully.
„
Make sure all sealings and o-rings are
„
not damaged and correctly installed to
assure the rated moisture ingress protec-
tion.
Recommended recalibration cycle: 1 year
14 WIKA Operating instructions / Betriebsanleitung
S = Span
Z = Zero
For further information (+49) 9372/132-295
F-20, F-21
GB
9. Maintenance, accessories /10. Trouble shooting

9. Maintenance, accessories

WIKA pressure transmitters require no maintenance.
„
Have repairs performed by the manufacturer only.
„
Accessories
For details about the accessories (e. g. connectors), please refer to WIKA's price list, WIKA's
product catalog on CD or or contact our sales department.

10. Trouble shooting

Open pressure connections only after the system is without pressure!
Warning
Take precautions with regard to remaining media in removed pressure trans-
„
!
mitters. Remaining media in the pressure port may be hazardous or
toxic!
Warning
„ Remove the pressure transmitter from service and mark it to prevent it from
being used again accidentally, if it becomes damaged or unsafe for opera-
tion.
„ Have repairs performed by the manufacturer only.
Do not insert any pointed or hard objects into the pressure port for cleaning to prevent
damage to the diaphragm of the pressure connection.
WIKA Operating instructions / Betriebsanleitung F-20, F-21
GB
15