Vega FIBERTRAC 31 Profibus PA Bedienungsanleitung PDF herunterladen (Seite 49)

6 Set up with the display and adjustment module

FIBERTRAC 31 • Probus PA

43833-EN-131119

The natural radiation on earth inuences the accuracy of the meas-

urement.

With this menu item the natural background radiation can be faded

out.

For this purpose, the FIBERTRAC 31 measures the natural back-

ground radiation and sets the pulse rate to zero.

In the future, the pulse rate from this background radiation will be

automatically deducted from the total pulse rate. This means: only

the component of the pulse rate originating from the source will be

displayed.

The source container must be closed for this setting.

In this menu item you can select the temperature unit.

in this menu item you can select if you want to carry out a single or

double point adjustment on the sensor.

With the double point adjustment, the Delta I value is selected auto-

matically.

We recommend selecting the double point adjustment. To use this,

you must be able to change the level of the vessel so as to carry out

the adjustment of the sensor with full status (covered) and with empty

status (uncovered).

Hence, you will get a very reliable switching point.

With single point adjustment, you have to dene the dierence

between the min. and max. adjustment points (Delta I) yourself during

the following setup.

This menu item appears only if you have selected "Single point

adjustment" as adjustment mode (Setup/Adjustment mode).

In this menu item you determine the point at which the FIBERTRAC

31 should switch in uncovered status.

Empty the vessel until the sensor is uncovered.

For this enter the requested pulse rate manually or let the rate be

determined by FIBERTRAC 31. Automatic determination of the pulse

rate should be given preference.

Setup - Background

radiation

Setup - Unit

Setup - Adjustment mode

Setup - Adjustment

uncovered (single point

adjustment)

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Vega FIBERTRAC 31 Profibus PA Bedienungsanleitung Seite 49