Uni-Probe LB 490
BERTHOLD TECHNOLOGIES GmbH & Co. KG
3 – 357
Volume 3 4 Calibration
3
4.4 One-Point Calibration
One-point calibration is used if adjustment of the upper calibration
point is not possible and if complete absorption of the radiation by
a full tank is not expected. Prerequisite is that the isotope (Co-60
or Cs-137) has already been set up correctly (see page 3–347).
One-point calibration is carried out in five steps:
– Select operating mode one-point calibration
– Measure background
– Empty calibration
– Full calibration through automatic calculation using the tank
data.
– Check calibration
The necessary steps will be explained in detail on the following
pages and in the proper order. For more information on the individ-
ual functions please refer to Volume 32.
Select the operating mode for one-point calibration (see
page 3–348).
4.4.1 Measure Background
Determine the background as described on page 3–351.
4.4.2 Empty Calibration
Carry out the empty calibration as described on page 3–352.
4.4.3 Full Calibration
If the following display is not visible, select it from the Start menu
as follows:
ACCESS TO SETUP FULL ACCESS CALIBRATION I/O NO. OF CAL.
POINTS (1) 1-2 POINT CURVE
See also "Setting the Operating Mode for Calibration" on
page 3–349.
Select
ADJUST LO.CAL. PT.
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