Endura APA592
pH / Redox (ORP) transmitter
8 Troubleshooting and Diagnostics
OI/APA592–EN Rev. E
75
M060.037
Sensor diagnostic
signal input error
[Sensor cable diag
signal input error]
Sensor cable diag signal related
sensor board electronics
malfunction.
[ELECTRONICS]
If the sensor does not support diagnosis, disable
the sensor diagnosis feature – see page 63.
If the problem persists, contact factory.
M080.039
Low pH measuring
electrode impedance
Improper sensor wiring, dirty
terminal block, improper
configuration or broken or cracked
electrode glass.
[SENSOR]
Verify sensor wiring.
Verify terminal blocks and other connections are
free of any liquids, oils, scale or corrosion.
Verify configuration settings are correct.
Ensure diagnostics is set to OFF if the sensor
does not have a solution ground connection.
Verify glass electrode is intact.
Verify sensor responds to pH buffers.
M082.040
Open snsr cable or
snsr out of solution
Sensor wiring problems, improper
configuration of sensor diagnosis
option.
[PROCESS]
Verify sensor wiring.
Verify sensor wiring is free of nicks, cuts, breaks
and/or open connections.
Verify configuration settings are correct.
Ensure diagnostics is set to OFF if the sensor does
not have a solution ground connection.
M084.038
Ground loops present or
shorted sensor cable
Sensor wiring problems, improper
configuration of sensor diagnosis
option.
[PROCESS]
Verify sensor wiring.
Verify sensor wiring is not shorted to other wiring or
metal surfaces.
Verify terminal blocks and other connections are
free of any liquids, oils, scale or corrosion.
If a sensor extension is being used, verify
connections are dry and free of corrosion.
Verify configuration settings are correct.
Ensure diagnostics is set to OFF if the sensor does
not have a solution ground connection.
M089.039
Dirty sensor detected
Sensor is dirty.
[SENSOR]
Verify sensor tip is clean.
Remove any foreign material.
Clean sensor.
Verify sensor responds to conductivity standard
solutions.
If sensor does not respond, electronically test
sensor.
Verify configuration.
Diagnostic Message
[Sub-error Message]
Possible Cause(s)
[Related Condition]
Corrective Action
Table 8.2 Diagnostic Messages (Continued)