Specifications

Transmitter Multiparameter M400 42
© 11 / 08 Mettler-Toledo AG, CH-8606 Greifensee, Switzerland Transmitter Multiparameter M400
Printed in Switzerland 52 121 378
8.2.3.3 Dissolved Oxygen Parameters
Select O
2
and press [ENTER]
Enter the Atmospheric pressure. The default value for AtmPres is 759.8 and the default unit is
mmHg.
Enter the Process Pressure. The units for process pressure and atmospheric pressure do not
have to be the same.
The salinity of the measured solution and the relative humidity of the calibration gas can also be
entered. The allowed values for Relative Humidity are in the range 0.00 to 100%. When no
humidity measurement is available, use 50% (default value).
Pressing the [ENTER] key again will bring up the Save Changes dialog. Selecting No will discard
the entered values and return to the measurement display screen, selecting Yes will save
changes made.
8.2.4 Set Averaging
Press the [ENTER] key to select this: Menu / Configure / Measurement / Set Averaging.
The averaging method (noise filter) for each measurement line can now be selected.
The options are Special (Default), None, Low, Medium and High:
None = no averaging or filtering
Low = equivalent to a 3 point moving average
Medium = equivalent to a 6 point moving average
High = equivalent to a 10 point moving average
Special = averaging depending on signal change (normally High averaging but Low averaging
for large changes in input signal)
Pressing the [ENTER] key again will bring up the Save Changes dialog. Selecting No will discard
the entered values and return to the measurement display screen, selecting Yes will save
changes made.