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• The pH calibration buffers in calibrating order.
The first pH calibration buffer:
The second pH calibration buffer:
The third pH calibration buffer:
Notes:• The “OLd” message displayed beside the pH value means
that this buffer was not used during last calibration. Press
and hold down SETUP if you want to see calibration date
(or time, if old calibration was performed on the same day
as the current calibration).
• For each custom buffer used in calibration, the “BUFFER
pH” tag will blink.
• If “no bUF” message appears on the LCD, the instrument
informs you that the calibration was performed with less than
three buffers.
• Calibration Expiration status:
- if disabled
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