Mettler Toledo M400/2(X)H Especificações descarregar pdf (Página 54)

Transmitter M400/2(X)H, M400G/2XH 54

Printed in Switzerland 30 031 683

The units for the slope and the zero point, that will be shown on the display can be chosen. The

default setting for the unit of the slope is [%] and can be changed to [pH/mV]. For the zero

point the default setting of the unit is [pH] and can be changed to [mV]. Use the c key to move

to the input field and select the unit by using the  or . key.

Pressing [ENTER] 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.

8.2.3.4 Parameters for oxygen measurement

based on amperometric sensors

If during the channel setup (see chapter 8.2.1 “Channel setup”) the parameter O2 hi, O2 lo or

O2 Trace has been chosen or an oxygen sensor based on ISM technology is connected to the

transmitter, the parameters calibration pressure, process pressure, ProCalPres, salinity and rela-

tive humidity can be set resp. adjusted. If an ISM sensor is connected, there is furthermore the

option to adjust the parameterization voltage.

For doing this adjustments resp. settings the menu “O2”, that will be displayed, has to be cho-

sen. (see chapter 8.2.3 “Parameter related settings”)

Enter the Calibration pressure in line 3. The default value for CalPres is 759.8 and the default

unit is mmHg.

Select Edit in line 4 for entering the applied process pressure manually. Select Ain if an analog

input signal is used for the applied process pressure. Press [ENTER]

NOTE: The menu Ain can only be selected if the transmitter is configured for an ISM sensor.

If Edit has been chosen an input field for entering the value manually is displayed. In case that

Ain has been selected the start value (4mA) and the end value (20 mA) of the range for the 4 to

mA input signal have to be entered.

Press [ENTER]

For the algorithm of the process calibration the applied pressure (ProcCalPres) has to be de-

fined. The value of the process pressure (ProcPres) or the calibration pressure (CalPres) can be

used. Chose the pressure, that applies during the process calibration, resp. should be used for

the algorithm.

Select the required Drift Control of the measuring signal during the calibration procedure. Choose

Manual if the user will decide when a signal is stable enough to complete the calibration. Select

Auto and an automatic stability control of the sensor signal during calibration through the trans-

mitter will be done. Press [ENTER]

In the next step the salinity of the measured solution can be modified.

In addition the relative humidity of the calibration gas can also be entered. The allowed values

for relative humidity are in the range 0% to 100%. When no humidity measurement is avail-

able, use 50% (default value).

Press [ENTER]

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Mettler Toledo M400/2(X)H Especificações Página 54