Crison 44 - Error Messages; Section 7 Troubleshooting

73
Section 7 Troubleshooting
7.1 Error messages
7.1.1 In measurements
7.1.2 In calibration
Error displayed Cause Resolution
L1
Measured value out of the programmed
limits
Verify the programmed limit value.
Verify the process evolution.
ALARM Alarm relay activated.
Verify the programmed limit value.
Verify the process evolution.
Once the problem is solved, push the
LEFT key for more than 3 seconds to
re-start the regulation.
SENSOR ALARM
Alarm relay activated with sensor
problems.
Check the sensor, replace if necessary.
Verify possible flow drop.
Verify process evolution.
Once the problem is solved, push the
LEFT key for more than 3 seconds to
re-start the regulation.
L-H (during regulation delay)
L-OFF (external Hold activated)
Measured value out of programmed
limits. The instrument is delays the
regulation the programmed time.
Verify the programmed limit value.
Verify the process evolution.
------ Measurement out of range
Examine the probe. Clean the probe.
Verify the cable. Replace if necessary.
PROBE OUT DO channel probe sensor
Verify DO sensor, replace if necessary.
Verify cable, replace if necessary.
Cl }}}}} Cl measurement out of range
Verify Cl sensor. Clean the sensor.
Verify cable, replace if necessary.
Error displayed Cause Resolution
Attention!
Asymmetry > 58 mV
Electrode “worn out”
Buffer solutions contaminated
Examine the probe. Clean or
regenerate the probe, replace if
necessary.
Examine the buffer solution. Make sure
that the buffer used matches the buffer
specified in configuration. Replace the
buffer solution. Make sure of the
temperature specification in
configuration.
Attention!
Buffer or electrode in poor condition
Attention!
Sens. < 70%
Unstable reading
Time > 100s
Unstable reading during calibration
Make sure that the probe is properly
immersed in the sample.
Examine the probe:
Clean the probe and the membrane.
Make sure that there are no air bubbles
in the membrane.
Repeat calibration.
Buffer / standard not recognized
Buffer / Standard solution not
recognized.
Examine the buffer solution. Make sure
that the buffer used matches the buffer
specified in configuration. Replace the
buffer solution. Make sure of the
temperature specification in
configuration.