4. PH CALIBRATING PROCEDURE
4-1 Calibrating Consideration
The PH meter already calibrated by mV signal
that simulated from the mV output of the ideal PH
ELECTRODE (base on 25 environment). For an
ideal electrode will produce 0 mV at PH 7.00, but
most electrodes are slight off.
It is necessary to make the following calibration
procedures (4-2, 4-3), if the user intend to keep
instrument along the electrode within high accuracy or the
first time use the meter & the electrode.
4-2 Requiring Equipment for Calibration
1) Combination PH ELECTRODE(optional).
2) Two buffer solutions (optional) : PH-07 & PH-04.
4-3 Two Points Calibration
1)
Power on the instrument using the " Power On/Off
Button " (3-2, Fig.1).
2) Select the " Function Switch " (3-11, Fig.1) to the
" PH MANUAL TEMP. " position.
3) Adjust the " Temperature Compensation Values " to
be same as the temperature values of the PH-04
buffer solution.
The adjusting procedures, please refer to 5-1.
4) Connect the combination PH ELECTRODE to the
" BNC socket " (3-15, Fig. 1) and place the electrode
into the buffer solution PH-07.
Use the screw to adjust the " PH 7 calibration VR " (3-9,
Fig.1) until the display reading reach to 7.00 0.01.
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