13
Display
Mode
Main
Display
Secondary
Display
Possible cause(s)
[Action(s)]
pH
Measure
UNDR
-5.0 to
60.0°C
pH value<0.00 pH.
[Replace the test solution
or recalibrate the meter.]
OVER
-5.0 to
60.0°C
pH value>14.00 pH.
[Replace the test solution
or recalibrate the meter.]
Conduc-
tivity
Measure
or
Conduc-
tivity
Calibration
UNDR
UNDR
Temperature< -5.0°C .
[Bring solution to a higher
temperature.]
[Replace electrode.]
OVER
OVER
Temperature> 60.0°C .
[Bring solution to a lower
temperature.]
[Replace electrode.]
Conduc-
tivity
Calibration
CAL
UNDR
-5.0 to
60.0°C
Correction of slope
beyond -30%.
[Use a new standard
solution.]
[Replace electrode.]
CAL
OVER
-5.0 to
60.0°C
Correction of slope
30%.
[Use a new standard
solution.]
[Replace electrode.]
Conduc-
tivity
Measure
OVER
-5.0 to
60.0°C
[The conductivity value of
the test solution is greater
than 20mS/cm.]
[Clean or Replace
electrode.]
SPECIFICATIONS
pH
Range
Resolution
Accuracy
0.00 to 14.00 pH
0.01 pH
±0.01 pH
Conductivity
Range
Resolution
Accuracy
0uS/cm to 20.00mS/cm
Minimum
1uS/cm
±1%FS
