Advanced Instruments OsmoTECH XT - Calibration Errors

Chapter 3 Calibration
OsmoTECH XT Single-Sample Micro-Osmometer Service Guide
19
3.6 Calibration errors
The following table lists errors that can occur during
calibration.
Error Possible cause/Suggested action
Calibration failed Action: Repeat calibration.
Calibration
required
Cause: A significant maintenance event
has occurred (for example, the probe
resistance has been changed).
Action: Recalibrate the instrument.
Calibrator out of
range:
0 mOsm/kg,
500 mOsm/kg,
1500 mOsm/kg,
3000 mOsm/kg,
or 4000 mOsm/kg
Cause: Too much variation in the
replicates for the calibrator group.
Action:
• Confirm good technique.
• Confirm sample handler is in good
condition.
• Check for particulates in sample.
Out of range: Low
Out of range: High
Cause: The result for the calibrator is
below/above the expected range for
that calibrator group.
Action: Make sure you are using the
correct calibrator.
Sample did not
freeze
See Troubleshooting.
Sample pre-freeze See Troubleshooting.
Test timeout See Troubleshooting.
Two replicate
failures
Cause: Two individual test failures
occurred within the same calibrator
group.
Action: Repeat calibration.
Wrong calibrator:
0 mOsm/kg,
500 mOsm/kg,
1500 mOsm/kg,
3000 mOsm/kg,
or 4000 mOsm/kg
Cause: The result for the calibrator was
above or below the expected range for
that calibrator group two times.
Action: Make sure you are using the
correct calibrator.