Endress+Hauser Gammapilot FMG50 - Page 68

Commissioning Gammapilot FMG50
68 Endress+Hauser
5. The calibration has been performed successfully.
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A0042220
6. The settings for the current output are then made in the "Output settings" step
Concentration of radiating media
For concentration measurement in radiating media (e.g.: K40), the Gammapilot FMG50
requires at least two other calibration points in addition to the background calibration:
• Pulse rate at high concentration of radiating medium
• Pulse rate at low concentration of radiating medium
The linearization defines the correlation between the measured pulse rate and the
concentration of the radiating medium (0 to 100%).
The Gammapilot FMG50 makes a variety of linearization modes available:
• Linear assignment of the pulse rate to the concentration
• Entry of any linearization table adapted to the specific application.
• The linearization table consists of up to 32 "normalized pulse rate : concentration"
value pairs
• The linearization table must be monotonic increasing, i.e. a higher concentration must
always be paired with a higher pulse rate.
0%
10000
100%
I
N
C (%)
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 20 Example of a linearization curve for measurements of the concentration of radiating media
C Concentration of radiating media
I
N
Normalized pulse rate
1. Selection of the type of linearization (already selected in the "Measurement settings"
section)