15
Replace the electrode.
BUFFER TEMPERATURE
This message appears if the temperature of the buffer is outside the
defined buffer temperature range.
WARNING MESSAGES
During calibration, the Calibration Check feature analyzes the electrode
calibration history and warns the user when problems have been detected.
It is possible to override the warning messages and confirm the calibration
but it is not recommended.
CLEAN ELECTRODE
This warning appears during Calibration Check for the second calibration
buffer when the instrument has detected a small variation of offset or
both offset and slope parameters. This variation may result from dirt on
the electrode. Refer to the electrode cleaning procedure. This ensures the
removal of film, dirt or deposits on the glass bulb and reference junction.
CLEAN ELECTRODE
alternating with
CHECK BUFFER
This warning appears during Calibration Check in the first calibration buffer
as a result of unacceptable offset variation or in the second calibration
buffer as a result of unacceptable slope variation. This variation may result
from dirt on the electrode or contaminated buffer. Refer to the electrode
cleaning procedure or use fresh buffer.
CONTAMINATED BUFFER
This warning message appears in order to alert that the buffer could be
contaminated. Refresh your buffer and continue the calibration procedure.