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Consort MANUAL HANDLEIDING MODE D’EMPLOI ANLEITUNG

	C5010 Input pH/mV: pH, mV Input EC/O2: Conductivity, Dissolved oxygen Input °C: Temperature (Pt1000) C5020 Input pH/mV: pH, mV Input EC/O2: Conductivity, Dissolved oxygen Input °C: Temperature (Pt1000)
	C5030 Input pH/mV: pH, mV Input mV2: mV-H2, mV Input °C: Temperature (Pt1000)

Keyboard

MODE=Selects all modes or escapes from error traps, calibration procedures, etc. by returning to the original mode.

CAL=Starts or proceeds a calibration or a function.

éê=Button for entering a value or for selecting a function.

ON/OFF=Switches the instrument on or off.

Installation of the instrument

Inputs

The measuring electrodes should be connected to the corresponding coaxial pH/mV or EC/O2 (C5030: mV2) connectors. Automatic temperature compensation and temperature measurements are possible by plugging a Pt1000 temperature probe into the °C terminals. Without Pt1000, the manual temperature compensation is 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/mV/temperature measurement

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.

rH2 measurement (C5030 only)

1. Select [rH2] by pressing MODE.
2. After rinsing the pH and redox electrodes with distilled water, immerse them in the samples and read the display.

Conductivity/TDS/Salinity measurement

Conductivity measurement (C5010, C5020 only)

1. Select the desired mode (S/cm) 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 standards in memory (0.01, 0.1, 1 M KCl). Select the proper values and press CAL.The unused standards should be switched off.
3. After rinsing the electrode several times with the first standard solution, immerse it in that standard. The solution temperature is not so critical but should lie between 0°C and 40°C. When no Pt1000 is used, do not forget to compensate manually first! Select [CALIBRATE], press CAL and follow the instructions on the screen until the calibration is finished.
4. Rinse the electrode several times with the sample, immerse it in that solution and read the display.
5. Rinse the electrode always after use and store it in distilled water (add some detergent to keep the spongy platinum surface in perfect condition).

TDS measurement (C5020 only)

1. Select the desired mode (mg/l)(TDS) by pressing MODE. The display will immediately show the measured value.

Salinity measurement(C5020 only)

1. Select the desired mode (SAL) by pressing MODE. The display will immediately show the measured value.

Dissolved oxygen measurement

Dissolved oxygen measurement(C5010, C5020 only)

1. Select [O2] 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 display shows the air pressure correction and the salinity correction. Select the proper values and press CAL. Leave salinity correction to zero unless you are going to measure in heavily salted solutions such as e.g. sea-water (35 g/l). Select [CALIBRATE], press CAL and follow the instructions on the screen until the calibration is finished.
3. The electrode exposed to the air reaches an equilibrium corresponding to the partial pressure of oxygen and thus to saturation in water at the given temperature. The instrument shows the measured saturation, current, temperature, and will calibrate automatically when readings are stable.
4. After rinsing the electrodes with distilled water, immerse them in the samples and read the display. Stirring the solution during the measurements promotes the homogeneity and is obligatory! The advection rate must be at least 10 cm/s.
5. Rinse the electrode always after use and store it in distilled water.

Interferences

All substances which can diffuse through the membrane and for which 800 mV potential suffices for polarographic reduction, will be reduced in the electrode. This will give a corresponding current contribution, if they are present. Interference can be caused by ions entering the electrode through porous or mechanically damaged membranes and by diffusion of other reactive gases apart from oxygen, e.g. CO2, Cl2, SO2, and H2S. These substances react in undesired manner with the electrode. Acidic or basic gases change the pH value of the electrolyte solution and thus disturb the reading, particularly when measuring small oxygen concentrations. High salt concentrations in the sample solution can falsify readings too.

Good Laboratory Practice

1. Select the desired range by pressing MODE.
2. Press CAL, select GLP and press CAL to display a complete calibration report.

Data Storage in the internal memory

Storing data(C5020, C5030 only)

1. Press ê to store the displayed value in memory. The display shows a next storage address.
2. Select the desired address and press CAL to enter the measured value in memory.

Recalling data(C5020, C5030 only)

1. Press é to recall the stored data. The display shows a list of stored values.
2. Select the desired address to read the stored values.
3. Press MODE to return to the normal measurements.