
Transmitter M300 53
© 12 / 11 Mettler-Toledo AG, CH-8606 Greifensee, Switzerland Transmitter Multiparameter M300
Printed in Switzerland 52 121 389
AnalogSensors:
Select Sensor Type and press [ENTER].
Available Sensor Types are:
pH/ORP = pH or ORP
Cond(2) = 2 electrode conductivity
Cond(4) = 4 electrode conductivity
O
2
hi
= Dissolved Oxygen (ppm)
O
2
(I) = Dissolved Oxygen (except 58037221, Thornton models only)
O
2
(V) = Dissolved Oxygen 58037221 (Thornton models only)
O
3
= Dissolved Ozone (Thornton models only)
ISMSensors:
pH/ORP = pH or ORP
pH/pNa = pH and ORP (with pH/pNa electrode)
O
2
hi = Dissolved oxygen (ppm)
Cond (2) = Cond 2-e sensor (Thornton models only)
Cond (4) = Cond 4-e sensor
Auto: = The transmitter automatically recognizes the connected sensor
If you select a specific parameter instead of auto, the transmitter only accepts the selected pa-
rameter type.
The 4 lines of the display can now be configured with sensor channel ”A” or ”B” for each line
of the display as well as measurements and unit multipliers. Pressing the [ENTER] key will dis-
play the selection for lines c and d.
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.
8.2.2 DerivedMeasurements(Thorntonmodelsonly)
There are three derived measurements available for configuration with two Conductivity sensors:
%Rej (% Rejection), pH Cal (Calculated pH) and CO
2
Cal (Calculated CO
2
). To set up any of
the derived measurements, first set up the two primary conductivity measurements, which will
be used to calculate the derived measurement. Define the primary measurements as if they were
stand-alone readings. Then the derived measurement can be defined.
h
NOTE:It is important to use the same units for both measurements.
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