VEGA WEIGHTRAC 31 Foundation Fieldbus User Manual

Page 44

7 Setup with PACTware

WEIGHTRAC 31 • Foundation Fieldbus

42375-EN-131120

Belt/screw speed min./max.

Here you can enter the min. and max. speed of the conveyor belt.

In this window you are asked to check the inputs of the instrument.

In this window you can accept the modifications previously made.
The data are written into the instrument.

Fig. 27: Fade out background radiation

The natural radiation on earth influences the accuracy of the meas-

urement.
With this menu item the natural background radiation can be faded

out.
For this purpose, the WEIGHTRAC 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.
Caution:

For this setting, the source container must be closed and the sensor

already in operation for five minutes.
Note:

If you want to use an already existing source container, we recom-

mend measuring the background radiation without connected source

container. A source container with a Cs-137 source should have a

distance of at least 3 m (10 ft) to the sensor for measurement of the

Check inputs (step 4)

Accept application (step

Setup - Background

radiation (step 6)