Mettler Toledo M400 Especificaciones descargar pdf (Pagina 60)

Transmitter M400 60

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Select Process Calibration. With ISFET sensors a process calibration is always performed as a

offset calibration.

The following calibration steps are the same as described for pH sensors (see chapter 7.6.3

“Process calibration”).

7.7.4 mV calibration

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

The following calibration steps are the same as described for pH sensors (see chapter 7.6.4

“mV calibration”).

7.8 Dissolved carbon dioxide calibration

For dissolved carbon dioxide (CO

) sensors, the M400 transmitter features one-point,

two-point or process calibration. For the one-point or two-point calibration the solution with

pH = 7.00 and/or pH = 9.21 of the Mettler – 9 standard buffer has to be used (see also chapter

8.2.3.85 “Dissolved carbon dioxide parameters”).

7.8.1 One point calibration

Enter CO

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

Select 1 point Calibration. With CO2 sensors a one point calibration is always performed as a

offset calibration.

Depending on the parameterized Drift control (see chapter 8.2.3.5 “Dissolved carbon dioxide

parameters”) one of the two following modes is active.

7.8.1.1 Auto Mode

Place the electrode in the buffer solution and press the [ENTER] key to start the calibration.

The display shows the buffer the transmitter has recognized (Point 1) and the measured value.

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Mettler Toledo M400 Especificaciones Pagina 60