Berthold LB 444 K-40 - Calibration Calculation

01/10 347 LB 444 K-40
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6.3 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,
different current ranges (0/4-20 mA) can be defined for the same product and can be
selected externally by selecting the “new” product, or different limit values can be used.
In the 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.
Detector LB 5402 Enter code “0”.
Detectors LB 5430 / LB 4430: Enter code “23”.
Measuring Path (0.1 to 9999.9 cm):
“1” is used for the potassium content measurement.
Select: Measure Mode:
Continuous:
Continuous measurement. This is the standard setting for most
measurements. With this type of measurement, a sliding average is
calculated over the selected time constant.
Batchmode
Batch measurement with external start-stop signal (digital input 22a and
22c).
or
via the <run> button.
We recommend using the “Batch measurement” mode, for example,
when a pipeline or container is filled briefly and then emptied again. In
this case, shorter measuring times can be used.
During batch measurement an arithmetic mean is calculated over the
measurement time.
To start a measurement process, either push the <run> button or
briefly connect terminals 22a /22c.
A measurement stops as soon as the entered measurement time is over
(time constant). The shortest batch time that can be used is approx. 2 s.
or
if you push the <run> button again.
See also 7.6
Time constant:
Enter the time constant of the instrument system. It determines the average calculation
of the counts supplied by the detector. In order to reduce statistical variations, you
should select the highest time constant that is still permissible. The typical input value is
300 s.
A measurement time can be preset for batch measurement. Once this time is over, the
measurement stops automatically. The shortest batch time that can be used is approx.
2 s.