INSTRUCTION MANUAL
10
3
Slide the connector cover over the electrode connector. Then, push the cover in straight until it comes in light con-
tact with the meter case. Do not turn the cover.
4
Insert the temperature connector securely into the jack on the meter.
4.
Calibration
Note
ISFET needs the zero adjustment procedures before calibration with standard solution.
5.
Measurement
Note
Do not eat the whole, or the part around where the electrode sensor touched, of measured samples. Some of the sensor
materials may generate environmental endocrine disrupters.
●
Recommended conditions for accurate measurement
For accurate measurement, note the items below.
•
Stir the sample gently with a stirrer during measurement or calibration.
•
Standard solutions used for calibration and measurement samples should be the same in temperature.
•
Rinse the electrode with the sample before measurement.
•
Calibrate the ISFET pH electrode before every measurement.
1
Immerse the sensing part and liquid junction com-
pletely into 3.33 mol/L KCl solution (300) for 10 min-
utes or longer. After that, rise them with pure water
and wipe them by patting the electrode dry with filter
paper.
2
Press the power switch to turn ON the power. The
Meas. LED blinks green.
Note
Automatic power OFF works in approximately 1 hour after power ON.
3
Keep the electrode in pH7 standard solution, with the
sensing part and liquid junction completely immersed.
If necessary, swing the sensor gently in the solution to
remove bubbles near the sensing part and liquid junc-
tion.
4
Adjust the zero point of the ISFET pH electrode by turn
the zero adjustment volume with a slot driver, to keep
pH meter readings within the range shown right.
Note
Before adjustment in pH measurement mode, clear the existing calibration
values and check that "CLR" is displayed on the screen. See the instruction
manual of the pH meter for the details.
5
Calibrate the ISFET pH electrode according to the instruction manual of the pH meter you use.
1
Wash the sensing part and liquid junction with pure water
and dry them by patting the electrode dry with filter paper,
prior to every immersion into standard/sample solution.
2
Press the power switch to turn ON the power. The Meas.
LED blinks green.
Note
Automatic power OFF works in approximately 1 hour after
power ON.
3
For liquid samples:
Immerse the sensing part and liquid junction to the sample
completely. Stir the electrode lightly to remove bubbles
near these parts, if necessary.
For solid samples:
Press the electrode tip into the sample slowly. Make sure
to keep the sensing part close to the sample without a gap.
4
Measure the sample according to the instruction manual
of the pH meter you use.
Blinking
Power switch
Zero adjustment volume
In mV measurement mode:
0 ±10 mV
In pH measurement mode:
±0.2 pH for the pH value of
pH 7 standard solution
Blinking
Power switch
