Specifications

Transmitter O
2
M300 27
© 05/07 Mettler-Toledo AG, CH-8606 Greifensee, Switzerland Transmitter O
2
M300
Printed in Switzerland 52 121 305
7.3.2 Process calibration
Enter Calibration mode as described in section 7.2.
Slope or Zeropt Process calibration can be selected. Choose a Slope Process calibration if you
are working in the high measuring range (i.e. around 100%sat) and choose a Zero Process
calibration if you are working in the low measuring range.
Take a snap shot of the measuring value by pressing the [ENTER] key. The M300 will return to
the measuring mode and the Letter of the Channel that is being calibrated will flash (i.e. A).
Take a sample and determine the O
2
value.
Pushing the [CAL] key will bring up the calibration screen again and the value of Point 1 can
now be entered.
Pressing [ENTER] will display 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
display