Mettler Toledo M400 Especificações descarregar pdf (Página 49)

Transmitter M400 49

Printed in Switzerland 52 121 378

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 ”S” and the offset value ”Z” are displayed.

In case of a successful calibration, the calibration values are stored in the cal history* and taken

over (Adjust), stored in the cal history* and not taken over (Calibrate) or discarded (Abort).

* only available with ISM sensor. The values will be stored in the sensor.

If ”Adjust” or ”Calibrate” are chosen, the message ”Calibration successful” is displayed. In any

case you will get the message ”Re-install sensor” and ”Press ENTER” on the display. After press-

ing ”ENTER” the M400 returns to the measuring mode.

NOTE: With ISM sensors: If a one point calibration is executed, the transmitter sends the polar-

ization voltage, valid for the calibration, to the sensor. If the polarization voltage for the measur-

ing mode and calibration mode is different, the transmitter will wait 120 seconds before starting

the calibration. In this case the transmitter will also go after the calibration for 120 seconds to

the HOLD Mode, before returning to the measuring mode again. (see also chapter 8.2.3.4 “Pa-

rameter for oxygen measurement based on amperometric sensors”)

7.4.2 Process calibration for amperometric oxygen sensors

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

A process calibration of oxygen sensors is always either a slope or a offset calibration.

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

Take a sample and press the [ENTER] key again to store the current measuring value. To show

the ongoing calibration process, A or B (depending on the channel) is blinking in the display.

After determining the O

value of the sample press the c key again to proceed with the calibra-

tion.

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Mettler Toledo M400 Especificações Página 49