YSI 5000 - Manual (Page 57)

54
12. Troubleshooting
Error Messages
The instrument performs a Power On Self Test each time it is turned on. The following error
codes are provided to facilitate troubleshooting.
Code/Problem Error Possible Cause Correction
Blank Display Dead/low batteries Replace batteries or
connect power supply
5011 adapter
improperly connected
Unplug 5011 from
power supply connector
E1: Check Probe
Temperature under
range Connector improperly
installed Check probe
connection
Intermittent connection
in cable or plug
Repair or replace
Temperature over
range
Electrical leakage in
connector or cable Repair or replace
Faulty temperature
sensor
Repair or replace
E2: Check
Membrane
High Background
current (DO) Insufficient warm-up
time See Calibration
Incorrect probe zeroing
procedure See Zero Calibration
Probe needs servicing See probe instructions
Probe malfunction Repair or replace
E3: Check
Membrane
DO Low current Insufficient electrolyte See probe instructions
Contaminated
electrodes or fouled
membrane
See probe instructions
Membrane too thick Try another membrane
High resistance in
probe connection Repair or replace