YSI 6000UPG - Manual (Page 126)

8-3
SENSOR PERFORMANCE PROBLEMS continued...
SYMPTOM POSSIBLE CAUSE ACTION REF
pH, ORP, Ammonium,
or Nitrate unstable or
inaccurate. Error
messages appear during
calibration. Probe requires cleaning Follow probe cleaning procedure 7.2
Probe requires calibration Follow cal procedures 3.1
Probe has been damaged Replace pH or ORP probe.
Replace sensor module on
ammonium or nitrate sensors. E
Water in probe connector Dry connector; reinstall probe E
Calibration solutions out of spec Use new calibration solutions
ORP fails Zobell check Repeat test. Check possible
causes above. 6.3
Internal failure Return sonde for service C
Depth unstable or
inaccurate Depth sensor has not been zeroed Follow depth zero procedure 3.1
Depth sensor access hole is
obstructed Follow depth cleaning procedure 7.2
Depth sensor has been damaged Return sonde for service C
Internal failure Return sonde for service C
Conductivity unstable or
inaccurate. Error
messages appear during
calibration. Conductivity improperly calibrated Follow cal procedure 3.1
Conductivity probe requires
cleaning Follow cleaning procedure 7.2
Water in probe connector Dry connector; reinstall probe 2.2
Conductivity probe damaged Replace 6030 probe 2.2
Calibration solution out of spec Use new calibration solution 3.2
Calibration value too far from
sample value Cal at or near expected value 3.2
Internal failure Return sonde for service C
Calibration solution or sample
does not cover entire sensor. Immerse sensor fully. 3.1
Installed probe has no
reading The sensor has been disabled Enable sensor 4.7
Water in probe connector Dry connector; reinstall probe 2.2
Probe has been damaged Replace the probe 2.2
Report output improperly set up Set up report output 4.6
Sonde’s autodetect feature has
malfunctioned Return sonde for service C
Internal failure Return sonde for service. C