Hach AMTAX sc Mode D'emploi page 28

Troubleshooting
7.2.3 Warnings
Warning displayed Instrument reaction
Instrument is warming
Warming up up sample tubing after
start (de-frosting)
Fan 100 % , standstill
Cooling down
until cool enough
Analyzer is too cold. Measurement
Measurement, but no
Analyzer is too hot.
more air cleaning
Continued
Cuvette is too cool.
measurement
Continued
Electrode slope
measurement
Filter modules are Continued
contaminated measurement
Maintenance mode Maintenance mode
Continued
Reagent level
measurement
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Cause
If there is a risk that
the sample tubes are
frozen, a warning is
displayed
Instrument is cooling
down after start using
ventilation, if it was
heated excessively
Interior of instrument is
cooler than 15 °C
(59 °F)
At very high internal
temperature, the air
cleaning of the filter
modules is disabled so
as to generate less
heat. internal temp =
target temp of cuvette
The cuvette is not
being heated
adequately 2 min after
sample change:
temp. = ((target temp.
of cuvette) –1 °C
(34 °F))
The warning occurs if
the electrode slope is
not in the range of
–55mV to –67mV
Filter modules soiled
The instrument is in
the Maintenance mode
or is switching to this
state
Amount of reagent has
dropped below
warning level set
Solution Reset warning
As far as possible, wait
until end of the
warm-up phase
(except if certain there
is no frost), to cancel Automatic
place instrument in
Maintenance mode
and start the
measurement again
Wait until instrument
Reset, automatically
has cooled down
as soon as cool
enough
Close instrument door,
Reset, automatically
if necessary check
as soon as warmer
heating
Change/clean air filter,
check air ducts for
blockage, check
enclosure fan, is Reset, automatically
ambient temperature as soon as cool
allowed? If necessary
increase electrode
temperature
Close instrument door,
check/fit cuvette
insulation. Attention: If
this warning occurs
during the calibration,
Automatic
there is a risk of
incorrect
measurements, for this
reason close door
during calibration!
Change membrane
and electrolyte, if there
is still a problem, check
standards and
Automatic
chemistry, check flow
rate. If all OK, but
warning still present, fit
new electrode
Clean filter modules
Automatic
soon
Automatic when the
– Maintenance mode is
left
Check reagent level
and replace if
necessary, then reset
reagent level. The On the menu
level is indicated MAINTENANCE/
mathematically and TEST/MAINTENANCE
can only function ./ REAGENT LEVEL
reliably if the counter is
only reset when the
solution is changed
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