
Transmitter M300 55
© 12 / 11 Mettler-Toledo AG, CH-8606 Greifensee, Switzerland Transmitter Multiparameter M300
Printed in Switzerland 52 121 389
8.2.2.3 CalculatedCO
2
(Powerplantapplicationsonly)
Carbon dioxidemay be calculated from cation conductivity and degassed cation conductivity
measurements on power plant samples using tables from ASTM Standard D4519. The M300
has these tables stored in memory, which it uses when units of CO
2
CAL are selected.
The calculated CO
2
measurement must be configured to the same channel as cation conductivi-
ty. For example, set up measurement ”a” on channel A to be cation conductivity, measurement
”b” on channel B to be degassed cation conductivity, measurement ”c” on
channel A to be calculated CO
2
and measurement ”d” on channel B to be temperature.
Set the temperature compensation mode to ”Cation” for both conductivity measurements.
8.2.3 TemperatureSource(notonISMversion)
(PATH: Menu/Configure/Measurement/Temperature Source)
Enter Configuration Mode as described in section 8.1 ”Enter Configuration mode” and select the
menu Measurement (see section 8.2 ”Configuration/Measurement”).
Navigate to the menu Temperature Source by using the m or . key. Press the [ENTER] key to
select this Menu. The following options can be chosen:
”Fixed”: allows a specific temperature value to be entered.
h
NOTE:The selection depends on the transmitter type. For detailed overview see the specifications
in section 16 ”Specification”.
”Use this Ch Pt1000”: temperature input will be taken from the sensor attached.
”Use this Ch Pt100”: temperature input will be taken from sensor attached
”Use this NTC22K”: temperature will be taken from the sensor attached
”Fixed = 25°C”: allows a specific temperature value to be entered
”Use Other Channel”: temperature input will be taken from the sensor attached to the other
channel (only on dual channel version)
h
NOTE: If temperature source is set to Fixed, the temperature applied during one-point and/or two-
point calibration of pH electrodes can be adjusted within the corresponding calibration proce-
dure. After the calibration the fixed temperature defined in this configuration menu is valid again.
Pressing the [ENTER] key will bring up the Save Changes dialog.
Selecting No will discard the entered values and return to the measurement display screen, se-
lecting Yes will save changes made.
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