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2. Instrument test pH
1 - Connect
Connect the PH-T via the adapter to the pH cable of your instrument.
2 - Switch on
Switch on the PH-T by pressing key “ON“ for 5 seconds.
NOTE
Switch-on is delayed to prevent accidental activation during transport.
3 - Select pH
Press the key labeled “F“ once to switch to the pH mode. Values are now displayed as
pH, indicated by “pH“ in the upper right-hand corner.
4 - Test / Calibration
For correct pH measurements, calibration is required with every new sensor. In this
test, the PH-T plays the role of the sensor. Therefor, carry out a calibration of your
instrument as if the PH-T were a regular pH electrode. Fortunately, with the PH-T you
do not need any calibration solutions.
Adjust the value of the PH-T to the pH value of the buffer solution you usually use, for
e.g. pH 7. Calibrate your instrument. Adjust the value of the PH-T to the pH value of the
second calibration solution, for e.g. pH 4, and calibrate your instrument again.
If your instrument works fine, then it will show now the same value as the PH-T, and
the calibration results were: a slope of 58 mV/pH, and a zero point of 0mV.
5 - Test
By use of the scroll keys of the PH-T you can set an arbitrary value within pH 0 - 14.
Your instrument must react within a few seconds to any changes and finally show the
same value as the PH-T.
NOTE
If you press a scroll key once, the value increases or decreases by 1 .
Hold it, and the value starts changing continuously, first slowly, then
faster.
NOTE
You do not want to calibrate? No problem. Many pH instruments
provide a mV display, for e. g. in the service menue, or can be
switched to ORP measurement. In both cases you can use the mV
mode of the PH-T and compare the mV values without calibration.
