User Manual

- 23 -
NIST Series
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12 APPENDIX 3: TABLE OF SELF-DIAGNOSIS
Symbol
Self-Diagnosis Information
pH
Conductivity
Wrong conductivity calibration solution or the meter recognition
of calibration solution out of range.
√
√
Press key when measuring value is not stable during calibration.
√
√
During calibration, the measuring value is not stable for ≥ 3 min.
√
√
pH electrode zero electric potential out of range (<-60mV
or >60mV)
√
pH electrode slope out of range (<85% or >110%)
√