18
FIVE-POINT CALIBRATION
•
Immerse the pH electrode and the
temperature probe approximately 4 cm
into the first buffer solution (pH 1.68,
4.01, 6.86, 7.01, 10.01 or 12.45) and stir
gently. The temperature probe should
be close to the pH electrode.
•
To enter the pH calibration mode, press
CAL from pH measurement mode.
•
The instrument will display the measured pH on the
primary LCD and the “7.01 pH” buffer on the
secondary LCD, together with “CAL” and “Cal Point
1” tags.
•
If necessary, use the arrow keys to select a different
buffer value.
39
HOLD FUNCTION
To freeze a stable reading on the LCD, press HOLD
key from normal measurement mode.
The “Auto” and “H” tags will blink on the LCD until the
reading stabilizes.
When the reading is stable, the “Auto” and “H” tags
stop blinking and the reading is frozen.
Press HOLD key again to return the normal measurement
mode.
Note:
Pressing RANGE the instrument will skip to the
displayed range, without leaving the HOLD
mode. The STORE key also holds HOLD mode.
Pressing SHIFT and then SETUP, GLP or MRCL
key, the instrument leaves the HOLD mode and
performs the selected function.
