BERTHOLD TECHNOLOGIES LB 480, User Manual

Page: 349 / 450

SENSseries LB 480 Level measurement
BERTHOLD TECHNOLOGIES GmbH & Co. KG
3 – 349
Volume 3 Menu Structure
3
Gases with hydrogen
If hydrogen is present in the gas, then the absorption of the Gamma
radiation is greater than would be expected by the actual gas den-
sity. This effect can be compensated by a increasing the gas density
to be entered.
If you cannot determine the increased absorption, please contact
BERTHOLD TECHNOLOGIES.
2.24
Calc Comp Factor
Menu path: Device Config

Setup

Cal Parameter

Cal
Comp Factor .
 Visible only if Compensation Mode is set to AUTO GPC .
You need this menu if you want to determine the Comp Factor ,
because the standard Comp Factor = 1 is only valid when the mea-
suring system utilizes the beam path to 45 degrees. The more you
deviate from it, the more important it is to determine the
Comp
Factor yourself. This requires that you pressure up the container
and read in the count rates at different pressures. The larger the
pressure range in which measuring points are recorded and the
more points you record, the more accurate will be the
Comp Factor
later.
1 ReadIn
Start reading-in the count rates. The count rates of the compensa-
tion detector and those of the level measurement are read in at the
same time. While the count rate is read in, the average is calculated
and displayed continuously.
Under ReadIn Time you define the read-in period.

First choose under Comp Table Index , which calibration point
you want to read in. You can select the data points 0...9.
When reading-in the count rates, the time remaining up to the end
of the operation is displayed. Finally, you are prompted to confirm
the detected count rate with
OK . To shorten the read-in process,
you can stop any time by pressing OK .
2 Comp Table Index
Displays the number of the measuring point whose values are dis-
played in
Cps Level and Cps Density .
3 Cps Level
Count rate of the level measurement for the measuring point that
is displayed in
Comp Table Index .

Select ReadIn to read in the count rate. If you already know
the value, you can enter it here.
4 Cps Density
Count rate of the gas density measurement for the measuring point
that is displayed in
Comp Table Index .

Select ReadIn to read in the count rate. If you already know
the value, you can enter it here.