
Transmitter M300 49
© 12 / 11 Mettler-Toledo AG, CH-8606 Greifensee, Switzerland Transmitter Multiparameter M300
Printed in Switzerland 52 121 389
7.5.5 ORPCalibration(onlyonISMVersion)
In case that an pH sensor with solution ground, based on the ISM technology is connected to
the transmitter, the M300 ISM give the option to make in addition an ORP calibration.
Enter ORP calibration mode as described in section 7.1 “Enter Calibration Mode”.
Enter Point 1. In addition the actual ORP is displayed.
Press [ENTER] to proceed.
The display shows the slope calibration factor S and the offset calibration factor Z.
Select Yes to save the new calibration values and the successful Calibration is confirmed on the
display. The calibration data will be stored in the sensor.
You will get the message ”Re-install sensor” and ”Press Enter” on the display. After pressing
”Enter” the M300 returns to the measuring mode.
7.6 SensorTemperatureCalibration(notonISMVersion)
Enter Calibration Mode as described in section 7.1 “Enter Calibration Mode” and select Tempera-
ture.
7.6.1 One-PointSensorTemperatureCalibration
(notonISMVersion)
Select 1 point calibration. Slope or Offset can be selected with the 1 point calibration. Select
Slope to recalculate the Slope factor M (Multiplier) or Offset to recalculate the offset calibration
factor A (Adder).
Enter the value for Point 1 and press [ENTER].
The newly calculated value – either M or A – is displayed. Select Yes to save the new calibration
values and the successful Calibration is confirmed on the display.
You will get the message ”Re-install sensor” and ”Press Enter” on the display. After pressing
”Enter” the M300 returns to the measuring mode.
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