YSI 600DW-B Sonde - Manual (Page 242)

Troubleshooting Section 6
6.3 SENSOR PERFORMANCE PROBLEMS
SYMPTOMS POSSIBLE
CAUSE ACTION REF
Probe not properly calibrated Follow chlorine cal procedures 2.6.1
Membrane not properly installed or
may be punctured Follow 6572 setup procedure 2.3.1
DO probe electrodes require
cleaning Follow cleaning procedure. Use
6035 maint. kit 2.10.2
Water in probe connector Dry connector; reinstall probe 2.3.2
Chlorine Charge too high >30
1. Anode tarnished
Follow cleaning procedure. Use
6035 maintenance kit 2.7
2.10.2
DO probe has been damaged Replace 6572 probe 8/C
Free Chlorine reading
unstable or inaccurate
Internal failure Return sonde for service 8
Probe requires cleaning Follow probe cleaning procedure 2.10.2
Probe requires calibration Follow cal procedures 2.6.1
3.7.4
pH probe reference junction has
dried out from improper storage. Soak probe in tap water or buffer
until readings become stable 2.10.2
Water in probe connector Dry connector; reinstall probe 2.3.2
Probe has been damaged Replace probe 8/C
Calibration solutions out of spec or
contaminated with other solution Use new calibration solutions C
ORP fails Zobell check Take into account temperature
dependence of Zobell solution
readings 5.3
pH, ORP, chloride,
ammonium, or nitrate
readings are unstable or
inaccurate. Error
messages appear during
calibration.
Internal failure Return sonde for service 8
YSI Incorporated Drinking Water Monitoring Systems Operations Manual 6- 3