Sper Scientific 850061 pH SD Card Datalogger Kit - Manual (Page 21)

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CALIBRATION
9. Press ▲ or ▼ in sequence to
select the following sceens:
10. When the desired screen is
reached (pH 7 for the first
calibration point), press ENTER to
save the calibration data and
complete the procedure.
Note
To clear the existing calibration data,
press ENTER when the “CLr” screen
pH 4.00
calibration
pH 7.00
calibration
pH 10.00
calibration
Clear the
existing
calibration data