Hanna Instruments HI 98150N - Manual (Page 14)

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• If “ WRONG” tag and “OLd” message are displayed on
the secondary LCD, an inconsistency exists between new
and previous (old) calibration data. Clear old calibration
parameters and proceed with calibration from the current
calibration point. The instrument will keep all confirmed
values during current calibration.
• With one-point calibration there is no “ Condition” and only
the frame is shown. Calibration time out is active.
• Each time a buffer is confirmed, the new calibration
parameters replace the old calibration parameters of
the corresponding buffer.
If current confirmed buffer has no
correspondence in the existing stored
calibration and this is not full, the
current buffer is added to the existing
stored calibration.
If the existing stored calibration is
full (five calibration points), after confirming the last
calibration point, the instrument will ask which buffer will be
replaced by current buffer.
Press the ARROW keys to select another buffer to be replaced.
Press CFM to confirm the buffer that will be replaced.
Press CAL to exit this function. In this case, the buffer
calibration will not be stored.
Note: The replaced buffer is not removed from the calibration list and
can be selected for the next calibration.
WORKING WITH CUSTOM BUFFERS
If a custom buffer was configured in SETUP menu, it can be selected for
calibration by pressing the
ARROW keys. The “CUSTOM” tag will be
displayed blinking on the LCD.
Press
2nd then Setup if you want to adjust
the buffer value to it’s value at the current
temperature. The buffer value, displayed on
the secondary LCD, will start blinking.
Use the
ARROW keys to change the buffer value.
After about 5 seconds, the last buffer change
will be updated. Press
2nd then Setup if you want to change it again.
Notes: • Custom buffer value can be adjusted in a ±1.00 pH window,
around the set value.
• If you want to return to the set custom buffer value, simply
press the ARROW keys ( then ) to select again the
custom buffer.