Hanna Instruments HI 2002, Instruction Manual, Page: 28 / 52

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When the reading is stable and close to the selected buffer, “CFM” tag will blink. Press GLP/CFM
key to confirm calibration.
Repeat procedure with additional pH buffers. A total of five pH buffers can be utilized.
After confirming the last desired buffer calibration points, press
CAL/MODIFY
key (or if all five buffer values were calibrated)
the instrument will automatically display “SAVING” as it stores
information. It will then return to normal measurement mode.
Each time a buffer is confirmed, the new calibration data replaces the
old data for the corresponding buffer or for any buffer in the proximity
of ±0.2 pH. If current buffer has no previous data stored and the
calibration is not full (five buffers), the current buffer is added to the
existing calibration. If the existing calibration is full, the instrument
asks which buffer to replace.
Press the keys to select another buffer to be replaced.
Press GLP/CFM key to confirm the buffer that will be replaced.
Press CAL/MODIFY key to leave calibration without replacing.
Note: If the replaced buffer is outside the ±0.2 pH window of the calibrated buffers, it is
possible to select this buffer during the next calibration.
Working With Custom Buffers
If a custom buffer was set in SETUP menu, it can be selected during
calibration by pressing the
keys. The “C1” or “C2” tag will
bedisplayed once selected.
Press RANGE /
u
key if you want to modify the custom buffer value.
The buffer value will start blinking.
Use the keys to change the buffer value. After 5 seconds, the
buffer value is updated. Press RANGE/
u
key
i
f you want to change it
again.
Note: Custom buffer values can be adjusted ±1.00 pH around the set value during calibration.
When a custom buffer is displayed, the “C1” or “C2” tag is displayed.
OPERA
TIONAL GUIDE