User Guide

24
HOLD FUNCTION (HI 8915 ONLY)
The hold function is activated by the HOLD key. The measured value
is frozen on the display when this key is pressed. "S" symbol will
appear on the display to indicate the holding (storage) mode.
Press the HOLD key again to return to regular operational mode.
AFTER MEASUREMENTS
After measurements switch the instrument off to save the battery.
For HI 9214: when not in use, disconnect the electrode from the
meter and cover the threaded connector with the supplied protective
cap.
ON
OFF
ON
OFF
OFF
mV
°C
pH
HOLD
S
pH
33
• Press RANGE to display pH measurement.
• Press CAL to start calibration and to display the last calibration
date again.
Note: If you want to retain the older calibration date, simply press
the CFM key twice to bypass the month and day entry.
• Using the UP and DOWN keys, enter the month while the
"month" symbol and the two left digits blink.
• Press CFM.
• The "day" symbol and the two right digits will start blinking.
Using the UP and DOWN keys, enter the day.
• Press CFM to enter the new calibration date. The meter will
request pH 7.01 buffer value and the display will show:
If "Er-7" appears, the calibration solution is
wrong or is out of specifications and needs
to be replaced.
• When "CAL" disappears and the meter
displays "CFM", press CFM to confirm the
offset calibration.
RANGE
CAL
CAL
month day
CAL
month day
CFM
CAL
month day
pH
CAL
CFM
pH
CAL
CFM