Error Messages - Crison MultiMeter 44 Manual Del Usuario

Section 7
7.1

Error messages

7.1.1 In measurements
Error displayed
L1
ALARM
SENSOR ALARM
L-H (during regulation delay)
L-OFF (external Hold activated)
------
PROBE OUT
Cl }}}}}
7.1.2 In calibration
Error displayed
Attention!
Asymmetry > 58 mV
Attention!
Buffer or electrode in poor condition
Attention!
Sens. < 70%
Unstable reading
Time > 100s
Buffer / standard not recognized
Troubleshooting
Cause
Measured value out of the programmed
limits
Alarm relay activated.
Alarm relay activated with sensor
problems.
Measured value out of programmed
limits. The instrument is delays the
regulation the programmed time.
Measurement out of range
DO channel probe sensor
Cl measurement out of range
Cause
Electrode "worn out"
Buffer solutions contaminated
Unstable reading during calibration
Buffer / Standard solution not
recognized.
Resolution
Verify the programmed limit value.
Verify the process evolution.
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.
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.
Verify the programmed limit value.
Verify the process evolution.
Examine the probe. Clean the probe.
Verify the cable. Replace if necessary.
Verify DO sensor, replace if necessary.
Verify cable, replace if necessary.
Verify Cl sensor. Clean the sensor.
Verify cable, replace if necessary.
Resolution
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.
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.
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.
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