Metrohm 949 - Page 41

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5 Operation
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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 maximum number of days or hours that may 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.
NOTE
The MAKE A NEW CAL message prompts the user to recalibrate
the ORP sensor.
3
Starting the calibration
Press the button to start the calibration.
P2.8 Resetting ORP settings
All ORP settings can be reset to the default values in P2.8.
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 ORP settings.