Adjustment Of Zero Point / Span; Maintenance, Accessories; Trouble Shooting - WIKA HP-1 Mode D'emploi

8. Adjustment of zero point / span

8. Adjustment of zero point / span
(only for pressure transmitter with clamping nut)
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 connector.
Remove the female connector. Open

the pressure transmitter by detaching
the clamping nut (see Fig. A ). Carefully
remove the male connector from the
case.
Adjust the zero point (Z) (see Fig. B ) 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:
half-yearly
14 WIKA Operating instructions/Betriebsanleitung/Mode d'emploi/Instrucciones de servicio HP-1/HP-2
GB
Female
connector
Sealing
Clamping
nut
Male
connector
Sealing
S = Span
Z = Zero
Case with
pressure
A
connection
For further information
(+49) 9372/132-295
9. Maintenance, accessories / 10. Trouble shooting

. 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!
B
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.
Please verify in advance if pressure is being applied (valves/ ball valve etc. open) and if the
right voltage supply and the right type of wiring (2-wire/ 3-wire) has been chosen?
Failure
No output signal
No/False output signal
WIKA Operating instructions/Betriebsanleitung/Mode d'emploi/Instrucciones de servicio HP-1/HP-2
Possible cause Procedure
Cable break Check connections and cable
No/incorrect voltage supply or current Adjust the voltage supply to correspond
spike with the Operating Instructions *)
Incorrectly wired (e.g. Connected as Follow pin assignment (see Instrument
2-wire instead of 3-wire system) Label / Operating Instructions)
GB
1