VEGA POINTRAC 31 8_16 mA_HART - four-wire User Manual

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6 Set up with the display and adjustment module

POINTRAC 31 • 8/16 mA/HART - four-wire

39411-EN-131119

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

adjustment" as adjustment mode (Setup/Adjustment mode).
In this menu item you can adjust at which percentage value of the

max. pulse rate the sensor should switch over.
Since in most cases the radiation is almost completely absorbed

when the sensor is covered, the pulse rate when the sensor is cov-

ered is very low.
The change between the two statuses is sufficiently clear.
Hence a percentage value of 90 % for the Delta I value is recom-

mended.
You select lower values for sensitive detection of material cones or

buildup which cause only partial absorption of the radiation.

This menu item appears only if you have selected under adjustment

mode (setup/adjustment mode) the "Two-point adjustment".
In this menu item you can set the min. pulse rate (ct/s) at which the

sensor should switch over.
Fill the vessel until the POINTRAC 31 is covered.
You thus get the min. pulse rate (ct/s) for the "covered" adjustment.
Enter the requested pulse rate manually or let the rate be determined

by POINTRAC 31. Automatic determination of the pulse rate should

be given preference.

You can enter the adjustment point (ct/s) manually.

You can let the adjustment point be determined by POINTRAC 31.

Setup/Delta I (single

point adjustment)

Adjustment "covered"

(two-point adjustment)