26
VIII. ERROR DISPLAYS AND TROUBLESHOOTING
LCD
display
ATC
display
mode
Possible cause(s)
[Action(s)]
"TERR" "OVER"
Conductivity,
TDS or Cell
Calibration
a. Temperature > 120.0°C.
[Bring solution to a lower
temperature.]
[Replace temperature probe.]
b. No temperature sensor..
[Use a temperature probe.]
"TERR" "UNDR" Conductivity,
TDS or Cell
Calibration
Temperature < -10.0°C.
[Bring solution to a higher
temperature.]
"OVER" -10.0~
120.0°C
Conductivity,
TDS or Cell
Calibration
Reading over user specified
range .
[Change range to higher level]
"LERR" -10.0~
120.0°C
Conductivity,
TDS or Cell
Calibration
Compensated Calibration
exceeds temperature limit.
[Increase or decrease the
solution temperature]
EEPROM
:
BAD
Power-on
Unit has failed its EEPROM test.
[Turn instrument OFF and back to
ON again.]
[Return for service. (see Warranty)]
ROM:
BAD
Power-on
Unit has failed its ROM test.
[Turn instrument OFF and back to
ON again.]
[Return for service. (see Warranty)]
RAM:
BAD
Power-on
Unit has failed its RAM test.
[Turn instrument OFF and back to
ON again.]
[Return for service. (see Warranty)]
