Mettler Toledo M400 Especificações descarregar pdf (Página 33)

Transmitter Multiparameter M400 33

Printed in Switzerland 52 121 378

7.2.1 One-point Sensor Calibration

(Display reﬂects typical Conductivity Sensor calibration)

Select 1 point Calibration and press [ENTER].

Enter the Value of calibration Point 1 and then press the [ENTER] key to start calibration. The

value in the 2nd text line is the actual measured value from the sensor prior to calibration.

After the calibration the Multiplier or slope calibration factor ”M” and the Adder or offset

calibration factor ”A” are displayed.

After a successful calibration, the calibration values are taken over and stored in the cal history

(Adjust), only stored in the cal history (Calibrate) or aborted.

7.2.2 Two-point Sensor Calibration (4-electrode sensors only)

Enter Conductivity Sensor Calibration mode as described in section 7.1.

Select 2 point Calibration and press [ENTER].

CAUTION: Rinse sensors with a high-purity water solution between calibration points to prevent

contamination of the reference solutions.

Enter the Value of Point 1 and press the [ENTER] key. Place the sensor into the second reference

solution.

Enter the Value of Point 2 and press the [ENTER] key to start the calibration.

After the calibration the Multiplier or slope calibration factor ”M” and the Adder or offset

calibration factor ”A” are displayed.

After a successful calibration, the calibration values are taken over and stored in the cal history

(Adjust), only stored in the cal history (Calibrate) or aborted.

7.3 Oxygen Calibration

Dissolved Oxygen calibration is performed as either a one-point or process calibration.

7.3.1 One-Point Sensor Calibration

Before air calibration, for highest accuracy, enter the barometric pressure and relative lumidity,

as described in section 8.2.3.3.

Enter Oxygen Calibration mode as described in section 7.1.

A DO sensor calibration is always either a one point Air (Slope) or a Zero (Offset) calibration. A

one point slope calibration is done in air and a one point offset calibration is done at 0 ppb DO.

A one-point zero dissolved oxygen calibration is available but not normally recommended since

zero DO is very hard to achieve.

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Mettler Toledo M400 Especificações Página 33