36
TROUBLESHOO
TING GUIDE
SYMPTOMS
PROBLEM
SOLUTION
After a titration, the
instrument displays
10.0% AA or 100 g/L AA
with the selected unit
blinking.
Broken electrode.
Instrument not
calibrated. Wrong
sample. Concentration
out of range.
Check/clean the electrodes.
Recalibrate the instrument (pump
and pH). Use care during sample
preparation. Check sample size and
permitted range.
At startup, the meter
displays the HANNA logo
permanently.
One of the keys is stuck.
Check the keyboard or contact the
vendor.
"Error xx"
message is
displayed.
Internal error.
Power off the meter and then power it
on again. If the error persists, contact
the vendor.
"Stirrer error"
message
is displayed at the end
of pump calibration or
titration.
Check the stir bar and
beaker content.
If the error persists, contact the
vendor.
Non-spinning stirrer icon
blinking in pH calibration
and meter mode.
Check the stir bar and
beaker content.
If the error persists, contact the
vendor.
"Pump error"
message is
displayed.
Check the tubing, valve
and syringe.
If the error persists, contact the
vendor.
At startup the meter
displays
"Methods
corrupted".
The method file was
corrupted.
Contact the vendor.
