2524
Wrong old slope
An inconsistency between new and previous (old) calibration is detected.
Clear old calibration parameters and initiate calibration from the current
point. The instrument will keep all confirmed values during current
calibration.
Note: For single-point calibration the electrode condition is not displayed
in the measurement screen.
Each time a buffer is confirmed, the new calibration parameters replace
the older calibration parameters of the corresponding buffer.
If an additional single buffer calibration is added at a latter time, the
new buffer point will be added to the stored calibration.
If the existing stored calibration is full (five calibration points), after
confirming the calibration point, the instrument will ask which buffer will
be replaced by current buffer. On the Buffer line will be displayed the
proposed buffer.
Press ARROW keys to select another buffer to be replaced.
Press Confirm to confirm the buffer that will be replaced.
Press ESC to exit mode. In this case, the buffer will not be entered.
Note: The replaced buffer is not removed from calibration list and it can
be selected for the next calibration points.
WORKING WITH CUSTOM BUFFERS
If at least one custom buffer was set in SETUP menu, it can be selected
for calibration by pressing the ARROW keys. The Custom function key
will be displayed.
Press Custom if you want to adjust the buffer to its value at the current
temperature.
Use the ARROW keys to change the buffer value.
Press Accept to accept new value or ESC to exit mode.
Note: Custom buffer value can be adjusted within a ±1.00 pH window,
around the set value.
WORKING WITH MILI pH BUFFERS
HANNA millesimal pH buffers are ± 0.002 pH buffers formulated to
correspond to nominal pH values. (1.000, 2.000, 3.000, 4.010, 5.000,
6.000, 7.010, 8.000, 9.000, 10.010, 11.000, 12.000, 13.000 and 9
that fall between). These buffers require the user to use the closest
standard buffer and adjust it, or to use custom buffers. With these buffers
it is possible to closely bracket the measurement range of interest and
insure an accurate measurement.
The resolution of the meter must be set to 0.001 pH (see SETUP on page 40).
Eight buffers are stored in instrument for calibration.
If calibration is invoked using millesimal buffers, the calibration buffer
can be modified within a ±0.020 pH range in accordance with the
label on the calibration buffer.
Press Change to enter buffer adjust mode.
Use ARROW keys to change the buffer value.
Press Accept to accept new value or ESC to exit adjusting mode.
CLEAR CALIBRATION
Press Clear function key when displayed to clear previous calibrations.
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