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FIRST TIME LONG TERM WARM UP
While following condition happens, please turn on the meter and wait for about one
hour until the reading on LCD is stabilized, then follow the steps in above section to run
calibration.
(1) D.O. probe has just been plugged into the meter.
(2) The membrane set has been replaced.
(3) The batteries have been replaced.
Remove the anti-collision hood from probe and rinse the electrode in de-ionized water
or pure water. DO NOT wipe the pH probe dry. Wiping the probe may cause static and
cause calibration and measurement instability.
Selecting the proper and fresh buffer will help the meter to recognize the buffer and
calibrate the probe precisely. Please clear the electrode with de-ionized water or
detergent, and follow the procedures for PH calibration value setup. It is suggested to
do the calibration every half month.
The pH calibration procedure is as followings:
Insert the PH probe into the meter.
1. Power on the meter
2. Pour PH buffer into a clean container and put the electrode into buffer. Suggest
to start from middle range buffer, such as pH7.01
3. Make sure the pH electrode is completely immersed in buffer and stir for about 1
minute to get homogenous condition without creating bubble.
4.
Press CAL/ESC key for 2 seconds to enter “calibration” mode.
PH probe CALIBRATION
