Mettler Toledo M400 Especificações descarregar pdf (Página 69)

Transmitter M400 69

Printed in Switzerland 52 121 378

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, 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 con-

ductivity.

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. chapter 7.3 “Conductivity calibration for in-

ductive sensors”).

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.

1 2 ... 64 65 66 67 68 69 70 71 72 73 74 ... 130 131

Sem comentários

Mettler Toledo M400 Especificações Página 69