Roche Cedex Bio, Operator'S Manual

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Roche Diagnostics
Operator’s Manual · Version 3.1 E-75
Cedex Bio System 15 ISE troubleshooting
List of ISE flags
Out of Rng
Meaning Slope out of range.
The slope for the specified electrode is outside the acceptable/programmed range.
Message ID 20
Priority 15
Possible cause This flag appears with calibrations because:
o
There are problems with the ISE solutions on the instrument.
o
There are problems with the electrodes or the ISE unit was not properly serviced.
o
The ISE Reference Solution tubing is blocked or leaking.
o
The dosing from the sample probe is not accurate.
o
The preamplifier is not working properly.
Recommended actions If only one calibration is flagged:
1. Repeat the calibration.
2. Repeat the calibration with fresh ISE Solutions 1 and 2, and check visually the
correct flow of all ISE solutions and the ISE Reference Solution.
If successive calibrations are flagged:
1. Repeat the calibration with fresh ISE Solutions 1 and 2, and check visually the
correct flow of all ISE solutions and the ISE Reference Solution.
2. Check whether the electrode expiration date has expired. Replace the electrodes, if
necessary.
3. Perform the maintenance action Electrode Service .
4. Perform the maintenance action Deproteinize Probes .
5. Check ISE Reference Solution tubing for leaks and blockages.
6. If the slopes of all electrodes are zero, replace the ISE Reference Electrode.
7. Contact your service representative.
? QC
Meaning A result where the quality control measurement is flagged.
Message ID 111
Priority 30
Possible cause The last QC measurement before this measurement was flagged. The dependency is
derived from the time sequence.
Recommended actions Check QC measurement.