OPERATION MANUAL
4
different temperature. For example, it will show pH4.00 under 25
℃
and pH4.02
under 35
℃
. Details please find it from the last page.
z
Slope
calibration
Ⅱ
: Take out the pH electrode, clean it by purified water and make it
dry, immerse the pH electrode to PH9.18 solution, shake it for a while then wait until
the number shows on the screen is stable, keep pressing the "calibration" key until
the screen show the "CAL", it shows 9.18 first, few seconds later shows the "END",
then shows the final pH value, which indicates the calibration is complete and be
stored. When finish calibration, the slope percentage will be adjusted automatically.
Please note the final calibrated pH value shows on the screen may be different under
different temperature. For example, it will show pH9.18 under 25
℃
and pH9.28
under 15
℃
. Details please find it from the last page.
Solution measurement
z
Measure the temperature of solution by thermometer, then press increase key "
∧
" or
decrease key "
∨
" adjust the temperature value, clean the pH electrode and immerse
it to the tested solution, shake it for a while then place until reading comes stable,
that is the PH value of the tested solution.
Notice: According to the isothermal measurement principle, for the temperature of tested
solution and calibration solution, the closer, the more accuracy of the test result.
z
MV value measurement:
Press "PH/MV" key, shift the instrument to "MV" display,
Connect ORP electrode and immerse them into the tested solution, shake for a while
then place it until the measure value is stable, that is the ORP value of the tested solution.
