YSI pHotoFlex pH Handheld Colorimeter - Manual (Page 84)

What to do if... pHotoFlex
®
pH
84 ba76123e01 02/2013
Obviously incorrect
measured values
Sensor symbol flashes
Cause Remedy
pH electrode:
– Not connected – Connect electrode
– Cable broken – Replace cable or electrode
– pH electrode unsuitable – Use suitable electrode
– Temperature difference
between buffer and test
sample too high
– Adjust temperature of buffer
or sample solutions
– Measurement procedure not
suitable
– Follow special procedure
Cause Remedy
– Calibration interval expired – Recalibrate the measuring
system