Manual
7
5.1 pH measurement (manual temperature compensation)
1) Power on the meter by pressing " Power Button " (3-2) once.
2) Prepare the pH Electrode ( optional ), install the " Probe Plug " (4-1) into the " pH Socket/BNC Socket "
(3-14).
3) Adjust the manual Temp. value same as the solution's temperature exactly, the procedures refer
chapter 8-8, page 25.
4) Hold the " Electrode Handle " (4-2) by hand and let the " Sensing head " (4-3) immersed wholly into the
measured solution and little shake the electrode.
5) The main display will show the pH value, the bottom display will show the setting manual Temp. value.
5.2 pH measurement (ATC, automatic temperature)
1) All the procedures are same as 5-1 pH measurement ( manual Temp. compensation) but should
prepare one temperature probe (optional), insert the probe's plug into the " Temp. Socket " (3-13),
immerse the sensing head of temperature probe into the measurement solution.
2) The main display will show the pH value, the bottom display will show the sensing Temp. value of the
measured solution (measured from ATC probe).
When not using the Electrode, you must immerse the " Electrode sensing head " (4-3) into the
"Protection bottle " (4-4).
5.3 mV measurement
The instrument build in mV ( millivolt ) measurement function, which enable you to make ion-selective,
ORP (oxidation-reduction potential), and other precise mV measurements.
1) Press the " Function Button " (3-6) once, the Display unit " pH " will change to " mV "
* Press the : Function Button " once will return to " pH " function.
2) Prepare the ORP Electrode ( optional, ORP-14 ), install the " Probe Plug " of ORP electrode into the
" pH Socket/BNC Socket " (3-14).
3) The Display will show the mV value.
5.4 pH calibration
Calibration consideration
The most ideal pH ELECTRODE generates 0 mV at pH 7.00 ( 177.4 mV at pH 4 ) and meter has been
always calibrated with signals which simulate the most ideal pH ELECTRODE ( based on 25 ambient
℃
environment ). However not every pH ELECTRODE is as accurate as the most ideal one, so calibration
procedures are necessary to be done before the first time measurement. In addition to the first time
measurement, users are also recommended to execute the calibration procedures to ensure the high
accuracy measurement.
Required equipment for calibration
1) pH ELECTRODE ( optional )
2) pH buffer solutions ( optional )
Calibration procedure
1) Prepare the pH Electrode ( optional ), install the " Probe Plug " (4-1) into the " pH Socket/BNC Socket "
(3-16).
2) Power on the meter by pressing " Power Button " (3-2) once.
3) Adjust the " Temperature Compensation Value " to make it same as the temperature value of the pH
buffer solution.
* Manual temperature compensation value adjustment procedure, see further down.
* Automatic temperature compensation, it should plug in the ATC probe ( optional).
4) Hold the " Electrode Handle " (4-2) by hand and let the " Sensing head " (4-3) immersed wholly into the
measured solution and little shake the probe. Display will show the pH value.
* If use the ATC probe, should imerse the ATC ptobe into the solution together.
