| Cause | Solution |
|---|---|
|
The freeze temperature set in the temperature menu (COOL) is too high for the sample. |
Lower the freeze temperature gradually by steps of 0.5 °C. Please be aware that after the settings have been changed, a new calibration is required. |
|
The cooling limit in the temperature menu is too high. |
Lower the cooling limit in the temperature menu gradually by steps of 0.5 °C to accelerate the cooling process. Please be aware that after the settings have been changed, a new calibration is required. |
|
The volume of the sample solution is too high, which prohibits freezing of the sample. |
Use an appropriate sample volume as it is recommended in the KNAUER user manual. |
|
The used plastic vial is not suitable for the measurement. |
Use the plastic vials that are recommended by KNAUER. |