YSI ADV6600 - Manual (Page 153)

Section 11. Troubleshooting
ADV6600
Y S I
Environmental
Page 143
SYMPTOM
POSSIBLE CAUSE
ACTION
REF
Probe not properly calibrated Follow DO cal procedures
Membrane not properly
installed or may be punctured Follow 6562 setup procedure
DO probe electrodes require
cleaning Follow DO cleaning procedure.
Use 6035 maintenance kit
Water in probe connector Dry connector; reinstall probe
Algae or other contaminant
clinging to DO probe Rinse DO probe with clean water
Barometric pressure entry is
incorrect Repeat DO cal procedure
Cal at extreme temperature Recalibrate at (or near) sample
temperature
DO Charge too high ( >100)
1. Anodes polarized (tarnished)
2. Probe left on continuously Enable DO charge parameter in
the Sonde report menu. Run
sonde, if charge is over 100,
recondition probe with 6035
Maintenance Kit. Follow DO
cleaning procedure.
DO Charge too low (<25)
Insufficient electrolyte. Replace electrolyte and
membrane.
DO probe has been damaged Replace 6562 probe
Dissolved Oxygen
reading unstable
or inaccurate
Internal failure Return sonde for service
Probe requires cleaning, Follow probe cleaning procedure
Probe requires calibration Follow cal procedures
pH probe reference junction has
dried out from improper
storage. Soak probe in tap water or buffer
until readings become stable
Water in probe connector Dry connector; reinstall probe
Probe has been damaged Replace probe
Calibration solutions out of
spec or contaminated with
other solution Use new calibration solutions
ORP fails Zobell check Take into account temperature
dependence of Zobell solution
readings
pH, ORP,
Chloride,
Ammonium, or
Nitrate readings
are unstable or
inaccurate. Error
messages appear
during calibration.
Internal failure Return sonde for service