VEGA MINITRAC 31 4 … 20 mA_HART - four-wire - Manual (Page 36)

36
6 Set up with the display and adjustment module
MINITRAC 31 • 4 … 20 mA/HART - four-wire
40447-EN-131119
The natural radiation on earth influences the accuracy of the meas-
urement.
With this menu item the natural background radiation can be faded
out.
Note:
Make sure that some products have a self-radiation. This is for ex-
ample the case with oil or potash salt lye. Therefore the tube must be
filled to determine the background radiation.
For this purpose, the MINITRAC 31 measures the natural background
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 (OFF).
In this menu item you can select the units of the process value and
the temperature.
In this menu item you can enter the measuring range (min. and max.
process value) of the sensor.
These settings influence the current output of the sensor.
Enter in the menu window "Max. process value" the max. density
value, for example in "g/cm 3 ". This corresponds to an output current
of 20 mA.
Enter in the menu window "Min. process value" the min. density value,
for example in "g/cm 3 ". This corresponds to an output current of 4 mA.
Setup/Background radia-
tion
Setup - Units
Setup - Adjustment