Hanna Instruments Edge Instruction Manual page 40

Calibration
Messages
40 Operational Guide
measured temperature but display it to the value at 25 ºC. Immediately after
calibration the buffer should read the value of the buffer at the temperature
of measurement.
Note: Temperature limits will be reduced to actual sensor specifications.
Clean Electrode
This error message indicates poor electrode
performance (offset out of accepted window, or
slope under the accepted lower limit). Often cleaning
the sensor will improve the pH electrodes response.
See pH Electrode Conditioning and Maintenance for
details. Repeat calibration after cleaning.
Check Electrode Check Buffer
This error message appears when electrode slope
exceeds the highest accepted slope limit. You should
check your electrode and use fresh buffer. Cleaning
may also improve this response.
Bad Electrode
This message appears if the cleaning procedure
performed as a result of the above two messages is
found to be unsuccessful. In this case it is advised to
replace the electrode.
Wrong Buffer Temperature
This message appears if the temperature of the
buffer is outside the defined buffer temperature
range. The calibration buffer solutions are affected
by temperature changes in a defined manner.
During calibration the instrument will automatically
calibrate to the pH value corresponding to the