pH 4 calibration
1)Rinse the electrode in distilled water.
Place electrode into buffer pH 4.00 solution.
2)All the calibration procedures are same as the
above pH calibration, except :
a. Change the buffer solution to pH 4.00 ( PH-04A ).
b. The calibration screen value will change to 7.00
instead of 4.00
Remark :
* Except calibrate pH 7, pH 4, meter also can calibrate
pH 10.
* The calibration procedures should start from the pH 7 at
first, then pH 4 ( or pH 10 ).
* During the calibration, the circuit will sensing solution
value automatically. If the buffer solution value already
beyond 7± 1 pH. 4± 1 pH, 10± 1 pH, the LCD will
show " Err ".
* When the LCD show the screen 2, it allow the user to
adjust another calibration value precisely ( for example
7.01, 6.99... ) by pressing the " button " ( 3-2, Fig.
▲
1 ) , " button " ( 3-4, Fig. 1 )'
▼
* Rinse the electrode in distilled water before change
the buffer solution.
* Repeat above pH, pH calibration procedures two
times at least.
* After calibration, the " Electrode sensing head "
( 3-9, Fig. 1 ) should insert into the " Protection bottle "
( 3-11, Fig. 1 ).
* PE-06HD, PH-07A, PH-04A is the consumer accessory.
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