OxyMax W COS 41
8 Trouble-shooting
Hauser
23
8
Trouble-shooting
8.1
Trouble-shooting instructions
If any of the following problems occur, test the measuring device as indicated.
!
Note!
Make sure you comply with the instructions for troubleshooting in the Operating Instruc-
tions of the transmitter. If necessary, carry out a test of the transmitter.
Problem
Test
Remedial action
No display,
no sensor reaction
Mains voltage to the transmitter ?
Sensor connected correctly ?
Medium flow available ?
Coating on the membrane ?
Electrolyte in the measuring chamber ?
Connect mains voltage
Set up correct connection
Create flow
Clean sensor
Fill with electrolyte or replace
electrolyte
Display value too high
With a TOP 68 connection:
Humidity or dirt in plug ?
Polarisation complete ?
Last calibration with different sensor ?
Temperature display clearly too low ?
Membrane visibly stretched ?
Electrolyte soiled ?
Open sensor. Dry electrodes transmit-
ter display now at 0 ?
Anode coating dissolved, is the anode
silver instead of brown ?
Gold cathode silver-plated ?
Cleaning of the TOP 68 plug-in
connection by using cleaning alcohol
Wait until polarisation time ends
Recalibrate
Check sensor, if necessary send
sensor in for repair
Replace membrane cap
Replace electrolyte
Check electrical connection. If the
problem still occurs, send the sensor in.
Send in the sensor for recoating
Clean the gold cathode
Value indicated too low
With a TOP 68 connection:
Humidity or dirt in plug ?
Sensor calibrated ?
Medium flow available ?
Temperature display on transmitter
clearly too high ?
Coating on the membrane ?
Electrolyte soiled?
Cleaning of the TOP 68 plug-in
connection by using cleaning alcohol
Recalibrate
Produce flow
Check sensor, if necessary send
sensor in for repair
Clean membrane or replace mem-
brane cap
Replace electrolyte
Strong deviations in
displayed value
Membrane visibly stretched ?
Open sensor. Dry electrodes transmit-
ter display now at 0 ?
EMC interference on the
measuring system ?
Replace membrane cap
Check electrical connection. If the pro-
blem still occurs, send in the sensor.
Remove outer screening of sensor and
extension cable at terminal S.
Cut measuring and signalling lines from
h.v. power lines.
Summary of Contents for OxyMax W COS 31
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