Mettler Toledo M400/2(X)H Especificaciones Pagina 51

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Transmitter M400/2(X)H, M400G/2XH 51
© 03 / 2014 Mettler-Toledo AG, CH-8606 Greifensee, Switzerland Transmitter M400/2(X)H, M400G/2XH
Printed in Switzerland 30 031 683
8.2.3.1 Conductivity temperature compensation
If during the channel setup (see chapter 8.2.1 “Channel setup”) the parameter conductivity has
been chosen or an four-electrode conductivity sensor based on ISM technology is connected to
the transmitter, the temperature compensation mode can be selected. Temperature compensation
should be matched to the characteristics of the application. The transmitter considers this value
for the temperature compensation by calculating and displaying the result for the measured
conductivity.
h
NOTE: For calibration purposes the temperature compensation as defined at the menu “Cal/Com-
pensation” for the buffers resp. samples will be considered (see also chapter 7.2 “Conductivity
Calibration for two- or four-electrode sensors” resp)
For doing this adjustment the menu “Resistivity”, that will be displayed, has to be chosen. (see
chapter 8.2.3 “Parameter related settings”)
The first two measurement lines are displayed on the screen. This chapter described the proce-
dure for the first measurement line. By using the key c the second line will be chosen. To select
the 3rd and 4th line press [ENTER]. The procedure itself works at every measurement line in the
same way.
Choices are ”Standard”, ”Lin 25°C” and ”Lin 20°C”.
Standard compensation includes compensation for non-linear high purity effects as well as con-
ventional neutral salt impurities and conforms to ASTM standards D1125 and D5391.
Lin 25 °C compensation adjusts the reading by a factor expressed as a ”% per °C” (deviation
from 25 °C). Use only if the solution has a well-characterized linear temperature coefficient.
The factory default setting is 2.0% / °C.
Lin 20 °C compensation adjusts the reading by a factor expressed as a ”% per °C” (deviation
from 20 °C). Use only if the solution has a well-characterized linear temperature coefficient.
The factory default setting is 2.0% / °C
If compensation mode ”Lin 25 °C” or ”Lin 20 °C” has been chosen, the factor for the adjustment
of the reading can be modified after pressing [ENTER] (If working at measurement line 1 or 2
press [ENTER] twice).
Adjust the factor for temperature compensation.
Pressing [ENTER] 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.
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