23
7+Series Version 2.0
Appendix I: Parameter setting & Factory default setting
Restore to factory
default
Select pH buffer solution
Restore to factory default
setting
Set reading stability criteria
Select electrode constant
Select conductivity standard
solution
Select reference temperature
Adjust temperature
compensation coefficient
Restore to factory default
setting
No/Yes for each parameters
Automatic Power-off setup
Appendix III: Self-diagnosis information
Self-diagnosis information
Wrong pH buffer 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 ≥3min.
Electrode zero electric potential out of range
(<-60mV or >60mV)
Electrode slope out of range
(<85% or >110%)
pH measuring range out of range
(<-2.00 pH or >16.00pH)