Dr. A. Kuntze PH-T Podręcznik - Strona 6

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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

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

Switch-on is delayed to prevent accidental activation during transport.

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.

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.