BERTHOLD TECHNOLOGIES LB 444, Operating Manual

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04/03
347
LB 444
19
4.3 Parameter
Measuring product
No. 1/2/3/4:
Parameters (detector type, current output range, limit values, etc.) for up to 4 different
products can be entered and stored. These parameters have to be entered separately for
each product.
The calibration data measured for a product may be copied to other data sets. Thus, dif-
ferent current ranges (0/4-20 mA) can be defined for the same product and can be se-
lected externally, by selecting the “new” product, or different limit values can be used.
In normal measurement mode the product for the current measurement is selected here.
Detector and Isotope :
Code: Detector-specific code number taking into account the
parameters to be defaulted for the detector type.
Values: enter “0” for measurements with Cs-137 and Co-60
for the detectors with NaI crystall.
Detector LB 5430: Enter “22”
Isotope
Co-60, Cs-137, Am-241,
Cm-244, Sr-90, Kr-85
Select isotope used. This entry controls decay compensation.
Measuring Path (0.1 to 9999.9 cm):
Enter measuring path in the product in cm. With 90° irradiation to the pipeline axis, the
measuring path is equal to the internal diameter of the pipeline. With irradiation angles
of 45° or 30°, the internal diameter of the pipeline has to be multiplied by a factor of
or 2, respectively.
The actual measuring path in the product has to be entered here when working with S or
U-shaped measuring paths where the pipeline is irradiated along the longitudinal axis,
and for measurements in a container.
Enter the data accurately if only one-point calibration of the measuring system can be
performed. With two or multi-point calibration the input is relatively irrelevant, as the
computer corrects the absorption coefficients accordingly.