21
Chapter V. Calibration and Measurement
pH/ISE/mV/ORP/TEMP Meter
pH Calibration and M easurement
Perform calibration every two hours to compensation for electrode drift. There are two
ways of calibrations; auto calibration or manual calibration.
Two of more than buffer calibration should be perform before pH is measured. Please
note that it is not available to calibrate just only 1 point. If you try to exit after
calibrating only 1 point, error message (¡ Err¡ ) is displayed. In this case press
Power
key or continue calibration.
Preparation
Connect meter with electrode and ATC.
Prepare a calibration buffer and magnetic stirrer.
Calibration
1) Calibration of CAL1(Buffer 1)
In the pH ready condition, press
Cal
key and then the displays is shown as follows.
Put electrode into the first buffer.
With constant, but not violent, stirring for accurate
measurement, press
M easure
key.
MEAS is displayed above the main field.
If pH reading is stable, ¡ S¡ appears in the left field.
IF CALIBRATING WITH BUFFERS OTHER THAN 4.00, 7.00
OR 10.00, ADJUST VALUE TO THE MEASURING BUFFER BY
PRESSING THE
OR
KEY.
Press
Cal
key therefore automatically set and then ¡ CAL 1
OK¡ message is displayed in the upper field.
Chapter V Calibration and Measurement
N eo M et
CAL 1
4.00
ATC
25.0
C
pH
MEAS
CAL 1
3.95
ATC
25.0
C
pH
