Endress+Hauser Oxymax W COS51D, Руководство по эксплуатации

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Trouble-shooting Oxymax W COS51D
26 Hauser
9 Trouble-shooting
9.1 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 Instructions of the
transmitter. If necessary, carry out a test of the transmitter.
9.2 Sensor checks
"
Caution!
Only authorised and trained personnel may test the sensor!
You will also require a multimeter (voltage, resistance).
Problem Check Remedial action
No display, no sensor
reaction
Mains voltage to the transmitter? Connect mains voltage.
Sensor connected correctly? Set up correct connection.
Medium flow available? Create flow.
Coating on the membrane? Clean the sensor.
Electrolyte in the measuring chamber? Fill with electrolyte or replace electrolyte.
Displayed value too high
Humidity or dirt in plug?(Fixed cable version
only) Cleaning by using cleaning alcohol.
Polarization complete? Wait until polarization time ends.
Last calibration with different sensor? Recalibrate
Temperature display clearly too low? Check sensor, if necessary send
sensor in for repair.
Membrane visibly stretched? Replace membrane cap.
Electrolyte soiled? Replace electrolyte.
Open sensor. Dry electrodes transmitter
display now at 0? Check electrical connection. If the
problem still occurs, send the sensor in.
Anode coating dissolved, is the anode silver
instead of brown? Send in the sensor for recoating.
Cathode silver-plated? Clean the cathode.
Displayed value too low
Humidity or dirt in plug?(Fixed cable version
only) Cleaning by using cleaning alcohol.
Sensor calibrated? Recalibrate
Medium flow available? Create flow.
Displayesd temperature clearly too high? Check sensor, if necessary send
sensor in for repair.
Coating on the membrane? Clean membrane or replace cap.
Electrolyte soiled? Replace electrolyte.
Strong deviations in
displayed value
Membrane visibly stretched? Replace membrane cap.
Open sensor. Dry electrodes transmitter
display now at 0? Check electrical connection. If the
problem still occurs, send the sensor in.
Check Measure Setpoint
Slope inspection
Place the sensor in the air, and dry with a
paper towel. After 10 minutes:
approx. 102% SAT