11
mode. Single point calibration is complete.
If the first buffer solution is 1.68, 4.00, 4.01, 9.18, 10.01 or
12.46 pH, at this moment, the unit will automatically exit the
calibration mode. Single point calibration is complete.]
4. Repeat steps 4 of “
Calibration with an ATC/Temp probe in
the pH NON- AUTOLOCK mode”
for 2 to 5 points calibration.
C. pH Measurements
To take pH measurements, 6377 must be calibrated before first
use.
a. Measurement with an ATC/Temp probe in the pH-
AUTOLOCK mode.
1. Connect the pH electrode to the BNC connector and the
ATC/Temp probe to the ATC/Temp connector of the unit. The
“ATC” icon will lit up.
2.
Press
“Mode”
key until “pH” icon and “AUTO” icon lit up.
3.
Rinse the pH electrode and ATC/temp probe with distilled
water and immerse in the sample to be measured. Remove
any air bubbles trapped around the probe by shaking or
stirring the probe.
4.
Press the
“Mea./Eff.”
key. The “WAIT” icon will start flashing.
The unit is waiting for a stable reading. The display will track
the pH value as sensed by the pH electrode and the
ATC/Temp probe.
5.
When the “WAIT” icon disappears, the reading is then “LOCK”
and will not respond to further changes from the sample. The
pH value shown is the pH value of the sample at the displayed
sample temperature.
[
Note:
For samples that are inherently unstable, the unit will
not AUTOLOCK. In this case, use the pH NON- AUTOLOCK
mode for measurements.]
b. Measurement with manual temperature compensation in
the pH-AUTOLOCK mode.
1.
Connect the pH electrode to the BNC connector of the unit.
The “MAN” icon will lit up. Set unit to display the sample
temperature by pressing the
“Up”
and
“Down”
keys (0.0 ~
100.0
℃
).
2.
Repeat steps 2 ~ 5 of
“Measurement with an ATC/Temp
probe in the pH- AUTOLOCK mode”.
