Mettler Toledo M300 ISM Especificaciones descargar pdf (Pagina 45)

Transmitter M300 45

Printed in Switzerland 52 121 389

7.4.1 One-PointSensorCalibration

Enter Ozone Calibration mode as described in section 7.1 “Enter Calibration Mode” and select

Ozone.

Ozone sensor calibration is always either a one point Comparison (Slope) or a Zero (Offset) cal-

ibration. A one point slope calibration is always obtained from a comparison instrument

or colorimetric test kit and a one point offset calibration is done in air or in Ozone-free water.

Select 1 point followed by either Slope or ZeroPt as the calibration type. Press [ENTER].

Enter the value for Point 1 including a decimal point and units. The value in the second text line

is the value being measured by the transmitter and sensor in the units selected by the user.

Press [ENTER] when this value is stable to perform the calibration.

After the calibration the slope calibration factor S and the offset calibration factor Z are displayed.

Select Yes to save the calibration values and the successful Calibration is confirmed on the dis-

play.

You will get the message ”Re-install sensor” and ”Press Enter” on the display. After pressing

”Enter” the M300 returns to the measuring mode.

7.5 pHCalibration

For pH sensors, the M300 transmitter features one-point, two-point (Auto or Manual mode)

or process calibration with 9 preset buffer sets or manual buffer entry. Buffer values refer to

25 °C. To calibrate the instrument with automatic buffer recognition, you need a standard pH

buffer solution that matches one of these values (see section 8.2.4.2 ”pH Parameters” for con-

figuring modes and selecting buffer sets). Please select the correct buffer table before using au-

tomatic calibration (see chapter 20 “Buffer tables”).

 NOTE: Only buffer table 20.2.1 Mettler-pH/pNa is available for dual membrane pH electrodes

(pH/pNa)

Enter pH Calibration mode as described in section 7.1 “Enter Calibration Mode”.

7.5.1 OnePointCalibration

Select 1 point Calibration. With pH sensors a one point calibration is always performed as a off-

set calibraton.

Depending on the parameterized Drift control (see chapter 8.2.4.2 “pH Parameters”) one of the

two following modes is active.

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Mettler Toledo M300 ISM Especificaciones Pagina 45