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
.
Sample pre-freeze
.
Test timeout
.
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.
