Hanna Instruments HI 84529 - Manual (Page 28)

www. hannainst .com 28 Operational Guide
If the “Wrong Old Slope” error message
is displayed, an inconsistency exists
between the current and the previous
(old) calibration. Clear the previous
calibration by pressing CLEAR and
proceed with calibration from the current
calibration point. The instrument will
keep all the confirmed values during the
current calibration.
If the temperature reading is out of
the defined temperature range of the
buffer (0 to 45 °C), the “Wrong Buffer
Temperature” error message will be
displayed, and the temperature symbol
will blink on the display. Calibration
cannot be confirmed in this situation.
Note: To clear a previous calibration
and to return to the default value,
press CLEAR at any time after entering
calibration mode. If CLEAR is invoked
during the first calibration, point the
instrument returns to the measurement
mode. The CLEAR key is displayed only if
a previous calibration exists.
Electrode
Calibration
Procedure