11
[
Note:
If the first buffer solution is 7.00 or 6.86 pH, at this
moment, press the
“Mode”
key, the unit will exit the calibration
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.]
5. Repeat steps 5 of “
Calibration with an ATC/Temp probe in
the pH NON- AUTOLOCK mode”
for 2 to 5 point calibration.
6. The unit calculates and compensates for the pH electrode slope
deviation corresponding to the values of the calibrated buffers.
After calibration, press and hold
“Mea./Eff.”
key for about 5
seconds to display the new electrode efficiency and offset.
C. pH Measurements
To take pH measurements, 6177M/6177EU 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”, “AUTO”, “ATC”,“buffer”, “WAIT”
icons 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 and the “LOCK” icon
appears, the meter 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.
