wtw inoLab Level 3 Operating Manual page 243

TP error
ISE error
No std available
Cause
During calibration:
– Calibration standards do
not have the correct
temperature (max.
temperature difference)
During measurement:
– Test sample does not
have the correct
temperature
(max. 2 °C temperature
±
difference from calibration
temperature)
Cause
During calibration:
– Calibration standards are
too close to each other
I ≤ 5 mV
IU - U
2 1
I ≤ 5 mV
IU - U
3 2
Cause
After two-point calibration:
– The highest or lowest
calibration standard was
used as the second
calibration solution.
Remedy
– Adjust the temperature of
the calibration standards
2 °C
±
– Adjust the temperature of
the test sample
Remedy
– Use other calibration
standards
Remedy
– Cancel the calibration
(the present two-point
calibration is retained)
What to do if...
243