Hanna Instruments HI 2216 - Manual (Page 20)

20
The third pH calibration buffer:
The fourth pH calibration buffer:
The fifth 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 five buffers.
• Calibration Expiration status:
- if disabled.
- or the number of days until the calibration alarm will be displayed.
- or if expired (7 days ago).