01/10 347 LB 444 K-40
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e) with product in the vessel which does not contain any potassium or
f) dismounted detector arranged on a concrete floor or min 20 mm lead or 40 mm
steel plate in front of the radiation window.
A calibration with several very closely adjacent concentration values can easily result in
an incorrect calibration curve.
Calibration steps:
Select menu Calibrate / Live Display with <more>.
Push <sk1> to call the Calibrate submenu.
Select product.
Select “no” for suspension measurement more
Select % K20. more
Push <sk1> to call the Data input submenu.
Background for rod detector N/A: continue with more
Deselect Calibr. Data transfer with “no”
1. Read in 1. Rate: cursor appears in the row “1. Rate = cps”.
Push <run>. The count rate is read in. Wait until the measured value has become stable
(approx. 100…300 s). While reading-in the count rate, the concentration of the products
must not change.
While reading in the count rate, take a sample of the product from the pipeline or the
container and determine the concentration of the sample in the lab. If the product is very
inhomogeneous, take several samples in quick succession and calculate an average value
from their concentration values.
2. Stop measurement by pressing the <run> button again.
3. Accept result with <enter>. Cursor jumps to next row.
4. Enter the concentration value of the sample(s) determined in the lab in % K
2
0 and
confirm with <enter>. Cursor jumps to third row.
Push <enter> to skip the current product temperature.
Further calibration points:
Repeat steps 1. – 4. for other different concentrations.
The values must always be available in pairs. If the associated concentration value is
missing, the count rate is automatically assigned the concentration value “0”.
All unused calibration points must contain “0” as count rate. If “0” is already present,
push <more>. Otherwise, delete the values with <clear> and confirm each with
<enter>.
Value pairs where only the count rate but no concentration is entered, will result in an
incorrect calibration curve.
The entered data can be corrected as needed. The calibration process is carried out in
the menu item Calculate.
Push <sk2> to select Calculate.
Select calibrate mode
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