Manual LactoFAN
2
17 of 30
Errors
A) auto-zero error before
measurement
001
–
zero point too low
Pollutants dissolved in the electrolyte of the sensor on
the counter-electrode generate a current opposing to
the measuring signal.
Cause: Long-tern contamination of the sensor by
pollutants (alcohol, disinfectants) from the ambient air.
002
–
zero point too high
Pollutants in the ambient air generate a signal at the
measuring electrode of the sensor.
Cause: Acute exposure of the sensor to H
2
(e.g.
calibration gas) or pollutants from the ambient air.
128
–
zero point instable
The signal of the sensor is not stable.
Cause: Same as for 002.
B) calibration error
004
–
ADC resolution too low
The sensors' sensitivity is too low; it's not possible to
resolute the measurement signal sufficiently detailed.
Cause: Same as for 001 or working life of sensor is
over.
008
–
overflow
The sensor's sensitivity is too high; the measurement
range of 300 ppm H
2
is not possible to be acquired.
Cause: Same as for 001.
016
–
calibration range exceeded
The sensors' sensitivity alteration in respect to the last
calibration is out of the tolerance range.
Cause: Same as for 001 and 002 respectively or
working life of sensor is over.
Turn the unit off, remove the
mouthpiece or adapter, and
expose the sensor to ambient air
for 3 minutes.
If this warning appears again
then this indicates a possible
contamination of the sensor with
a solvent. In this case remove all
sources of solvents from the
vicinity of the sensor and expose
to ambient air for 24 hours before
switching on again.
If you got no success, send the
device to the FAN service
workshop (see page 20).
operator is going to pass over an
auto-zero error
FAN does not recommend
performing measurements in
case of zero point error.
The operator takes the
responsibility for highly incorrect
results if measurements are
continued.
Results will be marked with a "!".
ppm reading
stays 0 always
sensor contaminated
See top of page.
main battery run down
Replace the 4 AA size batteries.
