VEGA WEIGHTRAC 31 Foundation Fieldbus - Manual (Page 44)

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
5)
Setup - Background
radiation (step 6)