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Verfügbare Sprachen
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Inputs
The measuring electrodes should be connected to the corresponding coaxial
pH/mV or EC connectors. Automatic temperature compensation and temperature
measurements are possible by plugging a Pt1000 temperature probe into the °C
terminals.
Without
automatically switched on.
•
Never immerse a pH electrode and a dissolved oxygen electrode together in the same
solution!
•
A blinking decimal point warns you for unstable measurements. Wait to read the
display! Stirring the solution during the measurements promotes the homogeneity
and is obligatory!
•
The instrument will refuse automatic calibration when the electrode is unstable.
Insufficient stirring or a worn electrode may be the cause.
Set-up
1. Select [SETTINGS] by pressing MODE.
2. Follow the instructions on the screen to adjust language, contrast and
automatic power-off timer or to erase the memory. Press CAL to confirm or
MODE to exit.
pH measurement
1. Select the desired mode (pH) by pressing MODE. The display will immediately
show the measured value according to the previous calibration. Should you
want to recalibrate, press CAL.
2. The instrument permits to choose between the buffers in memory (1.68, 2.00,
4.00, 4.01, 6.87, 7.00, 9.18, 9.21, 10.01, 12.00, 12.45). Select the proper
values and press CAL. The unused buffers should be switched off.
3. Rinse the electrodes with distilled water and immerse them in the first buffer
solution. Select [CALIBRATE], press CAL and follow the instructions on the
screen until the calibration is finished.
4. After rinsing the electrodes with distilled water, immerse them in the samples
and read the display.
5. Rinse the electrodes always with distilled water after use and store them in a
3...4 M KCl solution.
mV measurement
1. Select the desired mode (mV) by pressing MODE. The display will immediately
show the measured value according to the previous calibration. Should you
want to recalibrate, press CAL.
2. Immerse the electrodes in a standard solution of known potential. Select
[CALIBRATE] and press CAL. Adjust to the proper value and press CAL.
•
Select [RESET] and press CAL to reset the calibration.
Temperature measurement
1. Select the desired mode (°C) by pressing MODE. Should you want to
recalibrate, press CAL.
2. Immerse the Pt1000 in a solution of known temperature. Select [CALIBRATE]
and press CAL. Adjust to the proper value and press CAL.
•
Select [RESET] and press CAL to reset the calibration.
•
Without Pt1000, press CAL, adjust the manual temperature compensation and
proceed by pressing CAL.
Pt1000,
the
manual
Installation of the instrument
temperature
compensation
pH/mV/temperature measurement
2
is
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