
Transmitter M400 63
© 02 / 2010 Mettler-Toledo AG, CH-8606 Greifensee, Switzerland Transmitter M400
Printed in Switzerland 52 121 378
The display shows the slope calibration factor S and the offset calibration factor Z.
After a successful calibration, the calibration values are taken over (Adjust) or were aborted
(Calibrate or Abort).
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.
7.8.3 Process calibration
Enter CO
2
calibration mode as described in section 7.1 “Enter Calibration Mode”.
Select Process calibration. With CO2 sensors a process calibration is always performed as a off-
set calibration.
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 CO
2
value of the sample, press the c key again to proceed with the cali-
bration.
Enter the CO
2
value of the sample then press the [ENTER] key to start calibration.
The display shows the slope calibration factor S and the offset calibration factor Z.
After a successful calibration, the calibration values are taken over (Adjust) or were aborted
(Calibrate or Abort).
If ”Adjust” or ”Calibrate” are chosen, the message ”Calibration successful” is displayed. The
M400 returns to the measuring mode.
7.9 Sensor temperature calibration
(only for analog sensors)
Enter Sensor calibration mode as described in section 7.1 “Enter Calibration Mode” and select
Temperature.
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