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Display
Mode
pH
Calibration
pH Measure
Conductivity
Measure
or
Conductivity
Calibration
Conductivity
Calibration
Conductivity
Measure
Main
Secondary
Display
Display
UNDR
60.0 °C
OVER
60.0 °C
UNDR
60.0 °C
OVER
60.0 °C
UNDR
OVER
CAL
UNDR
60.0 °C
CAL
OVER
60.0 °C
OVER
60.0 °C
0.0 to
mV>91.7mV; New slope>
0.0 to
-5.0 to
[Replace the test solution
or recalibrate the meter.]
-5.0 to
[Replace the test solution
or recalibrate the meter.]
Temperature < -5.0°C.
UNDR
Temperature > 60.0°C.
OVER
-5.0 to
-5.0 to
[The conductivity value
-5.0 to
greater than 20mS/cm.]
9
Possible cause(s)
[Action(s)]
Offset @ 7.00pH:
mV>100mV;
Offset@6.86pH:
ideal slope by +30%
[Use a new buffer
solution.]
[Replace electrode.]
Offset @ 7.00pH:
mV< -100mV;
Offset@6.86pH:
mV<-108.7mV;
New slope<ideal
slope by -30%
[Use a new buffer
solution.]
[Replace electrode.]
pH value<0.00 pH.
pH value>14.00 pH.
[Bring solution to a
higher temperature.]
[Replace electrode.]
[Bring solution to a
lower temperature.]
[Replace electrode.]
Correction of slope
beyond -30%.
[Use a new standard
solution.]
[Replace electrode.]
Correction of slope
beyond +30%.
[Use a new standard
solution.]
[Replace electrode.]
of the test solution is
[Clean or Replace
electrode.]
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