YSI 6 series User Manual page 286

Troubleshooting
Depth unstable or
inaccurate
Conductivity unstable
or inaccurate. Error
messages appear during
calibration.
Installed probe has no
reading
Temperature, unstable
or inaccurate
Optical probe (turbidity,
chlorophyll, rhodamine
WT, BGA-PC, or BGA-
PE) unstable or
inaccurate. Error
messages appear during
calibration
YSI Incorporated Environmental Monitoring Systems Operations Manual
Water in probe connector
Probe has been damaged
Calibration solutions out of spec or
contaminated with other solution
ORP fails Zobell check
Internal failure
Depth sensor has not been zeroed
Depth sensor access hole is
obstructed
Depth sensor has been damaged
Internal failure
Conductivity improperly
calibrated.
Conductivity probe requires
cleaning
Conductivity probe damaged
Calibration solution out of spec or
contaminated
Internal failure
Calibration solution or sample
does not cover entire sensor.
The sensor has been disabled
Water in probe connector
Probe has been damaged
Report output improperly set up
Internal failure
Water in connector
Probe has been damaged
Probe requires cleaning.
Probe requires calibration
Probe has been damaged
Water in probe connector
Calibration solutions out of spec
Wiper is not turning or is not
synchronized.
Wiper is fouled or damaged.
Internal failure.
Dry connector; reinstall probe
Replace probe
Use new calibration solutions
Take into account temperature
dependence of Zobell solution
readings
Return sonde for service
Follow depth zero procedure
Follow depth cleaning procedure
Return sonde for service
Return sonde for service
Follow cal procedure
Follow cleaning procedure
Replace probe
Use new calibration solution
Return sonde for service
Immerse sensor fully.
Enable sensor
Dry connector; reinstall probe
Replace the 6560 probe
Set up report output
Return sonde for service.
Dry connector; reinstall probe
Replace the 6560 probe
Follow probe cleaning procedure
Follow cal procedures
Replace probe
Dry connector; reinstall probe
Use new calibration solutions
Activate wiper. Assure rotation.
Make sure setscrew is tight.
Clean or replace wiper.
Return probe for service.
Section 6
2.3.2
9
C
5.4
9
2.6.1
2.10.2
9
9
2.6.1
2.10.2
9
C
8
2.6.1
2.9.7
2.3.2
9
2.9.6
9
2.3.2
9
2.10.2
2.6.1
9
2.3.2
C
2.10.2
2.10.2
9
6-
4