YSI 5200 - Manual (Page 120)

YSI Incorporated 118 5200 Recirculating System Monitor
Problem Possible Solution
Sensor Problems
Sensor requires cleaning. Follow sensor cleaning procedure.
Sensor requires calibration. Follow cal procedures.
pH sensor reference junction has dried out from improper storage.
Soak sensor overnight in 2 molar potassium chloride. If not available,
tap water or pH buffer may be substituted.
Water in sensor connector. Dry connector; reinstall sensor.
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.
Sensor has been damaged. Replace sensor.
pH or ORP readings are
unstable or inaccurate. Out of
Range message appears
during calibration.
Internal failure. Return probe module for service.
Conductivity improperly calibrated. Follow calibration procedure.
Conductivity sensor requires cleaning. Follow cleaning procedure.
Calibration solution out of spec or contaminated. Use new calibration
solution.
Internal failure. Return probe module for service.
Calibration solution or sample does not cover entire sensor. Immerse
sensor fully.
Conductivity unstable or
inaccurate. Out of Range
message appears during
calibration.
Conductivity sensor damaged. Replace sensor.
Water in connector. Dry connector; reinstall sensor. Temperature, unstable or
inaccurate
Sensor has been damaged. Replace the sensor.
The sensor has been disabled. Enable sensor.
Water in sensor connector. Dry connector; reinstall sensor.
Sensor has been damaged. Replace the sensor.
Installed sensor has no
reading
Internal failure. Return probe module for service.
If these guidelines and tips fail to correct your problem or if any other symptoms occur, contact YSI
Customer Service for Advice. Refer to Section 14.
13.1.1 Relay In Use Error Codes
R a n g e L o w
R e l a y R 1
When selecting an internal control relay, an error message will appear when you press the Enter [  ] key
if the relay address is already in use. In the example below, the relay is already in use by the General
Alarm.