9 Error Messages and Troubleshooting
30 | Error Messages and Troubleshooting
Remedy:
Unscrew the thermistor probe. The needle can then be straightened
(caution—risk of
injury!)
, repositioned and checked for mechanical maneuverability. The needle movement can
be checked for this purpose via the display <
thermistor probe adjustment
.
Select
>
adjust
>
thermistor probe adjustment
in the initial display. Select
OK
to move the
needle.
2.
The ice crystals at the tip of the stainless steel needle do not reach the undercooled liquid
sample despite the lack of mechanical problems with the movement of the needle. The ice-
covered tip of the stainless steel needle passes through a bore above the measuring vessel
during the crystallization-initiation phase. This bore may contain a drop of water or be very
dirty. The drop of water may be the result of ice crystals falling from the upper cooling system.
Remedy:
Use the Pasteur pipette included with the accessories together with a long tube as a
bellows to blow debris out of the bore. First remove the measuring vessel and hold a
paper towel underneath the thermistor probe. The bore can first be rinsed using a spray
bottle of water to clean out sample residues, which can rub off and accumulate on the
interior surface over time. The unit does not need to be switched off for this cleaning
process, so measurement is only briefly interrupted.
3.
No ice forms in the upper cooling system because the humidity is too low or the unit was put
into operation too quickly after being switched on.
Remedy:
If the air humidity is very low (for example, in heated or air-conditioned rooms), open
the cover of the upper cooling system.
9.4
Classification of Malfunctions by Component Group
The following presents an overview of the individual component groups, identifying the function of
each component, its potential malfunctions, the effects of the malfunctions on the measurement
system, the possible causes of the malfunctions and the procedure for correcting each malfunction.
Calibration cannot help minimize damage in the case of malfunction. It is of no consequence whether
these malfunctions occur during calibration or sample measurement.
Some errors can be remedied directly by the user or an in-house medical equipment technician; other
errors require return of the unit to the manufacturer.
