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5 Operation
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P1.7 pH calibration time
P1.7 is used to set the time until the next calibration. The P1.7 setting is
important for GLP protocols. No default value is set for the calibration
time.
1
Selecting the unit
￭ Use the and buttons to select HOURS or DAYS.
￭ Confirm the selection with the button.
A number appears in the middle of the display. The number defines
the days or hours that elapse between 2 calibrations.
2
Setting the time
￭ Use the and buttons to change the number.
￭ Confirm the setting with the button.
As soon as a calibration time has been set, the symbol will
appear on the display in measuring mode.
As soon as the set calibration time is reached, the 949 pH Meter pre-
vents further measurements and the and symbols flash on
the display.
The MAKE A NEW CAL message prompts the user to recalibrate
the pH sensor.
3
Starting the calibration
Press the button to start the calibration.
P1.8 Resetting pH settings
P1.8 is used to reset all pH settings to the default values.
1
If the 949 pH Meter does not work perfectly or calibrates incorrectly,
select YES with the and buttons.
2
Confirm the selection with the button.
NOTE
All saved data is retained when resetting the pH settings.
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