Maintenance and troubleshooting
20.08.2012 Page 41 of 42 Rev. 04
6.4.3 Equipment errors
There is the possibility that you can’t read anything at the display; in this case
switch off the device and switch it on again. If you to see the last measuring
values follow the steps described in chapter “display measuring results”.
If the display is everlasting unreadable you have to call the service.
6.4.4 Measuring errors
Glucose and/or lactate
readout happens after the enzymatic-amperometric read
process. The signal occurs after a chemical reaction with the immobilised enzyme
as a change in current on an electrode.
As with all flow systems, the tightness and patency of the channel between the
sample cannula and piston pump is very important for the function of the
analyser.
Escaping fluid just like air segments running irregularly through the system is
always an indicator of lack of tightness, e.g. worn out seals in the rinse cup,
loose tubes or incorrectly inserted sample cannula.
Please call the service, if you see these problems at your equipment.
Scattered readings:
May also be due to a sample that is not exaxt. Check therefore with a few
calibration solution cups where the precision has been incorrect on several
occasions. Can also be due to a defective sensor
Calibration unstable, frequent errors, scattering too great:
Can also be due to extreme temperature variations (e.g. direct sunlight)
Calibration not possible, value too small:
Can also be due to a defective (insensitive) sensor, frequent occurrence of the
error “maximum margin”
depending on sensor type
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