Berthold Duo Xpert, Operating Manual

Page: 113 / 233

LB 470 Level
7 Main Menu Device Setup
56925BA2 Rev. 03, 11/2017
113
Adjust: Low Level Adjust
Device settings | Setup | Calibration | Adjust
After calibration, a level adjustment can be performed. A level adjustment must be
performed if the level shown is not the actual level. The lower adjustment can only
be performed at a level < 50%. The count rate at 100% will be kept fixed, while all
other points of the curve will be adjusted according to the adjusted count rate at
the entered level value.
1
2
Adjusted curve (linear calibration type)
Adjusted curve (exponential calibration type)
Fig. 93 Adjusted curves (Low Level Adjust)
NOTICE
Make sure that the source is mounted and the beam path is open. The container
must be empty, or be below the limit value.
1
2
3
4
Button < Perform adjustment >
Input field
″
Process value
″
Input field
″
Measuring Duration
″
Process bar
5
6
7
8
9 Button < Ok >
Display field
″
Count rate
″
[cps]
Button < Cancel >
Button < Start >
Button < Stop >
Fig. 94 Lower adjustment
1. Click on the field Process value (Fig. 94, item 3) to open the input field.
2. Specify a percentage value for the lower adjustment and confirm with the
Enter key.
3. Click on the
″
Read-In-Time
″
field (Fig. 94, item 2) and specify the duration of
measurement in seconds. The higher you set the measurement time, the