9. Error messages
9.1. Error codes
Error code
Description
1 :
error lift: end position not reached, please check
3 :
uncalibrated or defective thermistor
4 :
error on calibration: please check solution
5 :
frozen too early
6 :
plateau not found
7 :
not frozen
- :
cooling system not ready yet
- :
communication error
a)
error lift: end position not reached, please check
When starting a measurement or calibration, the device tries to move the lift at
first to the upper position and after that to the lower position and checks the
movement. If the lift can't move freely or is blocked and can't reach the final
positions, the device will show the lift error. This can be caused by defective
final position switches or defective lift motor or broken cable to the switches or
motor.
b)
uncalibrated or defective thermistor:
The instrument tests the current thermistor value when starting a measurement
or calibration. Its electrical resistance is known to be a function of the
temperature. This electrical resistance is translated with an ADC (analogue
digital converter) into a number which is then used by the instrument. If the
thermistor has a short circuit or a disruption, its resistance is zero or infinite,
both of which conditions are impossible for a properly functioning thermistor. In
this case, the thermistor will not start the measurement. If the temperature
which is given from the current thermistor value together with the calibration
constant stored in the device is lower than +1°C (which is not possible with a
thermistor which is located in a new, i.e. still warm sample), the device will also
fail to start the measurement.
c)
error on calibration: please check solution
see 9.2
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