Mounting Gammapilot FMG50
24 Endress+Hauser
4.2.5 Installation conditions for density measurement
Conditions
• If possible, density should be measured on vertical pipes with forward flow from bottom
to top.
• If only horizontal pipes are accessible, the path of the beam should also be arranged
horizontally to minimize the influence of air bubbles and deposits.
• The Endress+Hauser clamping device or an equivalent clamping device should be used to
fasten the source container and the Gammapilot FMG50 to the measuring pipe.
The clamping device itself must be installed in such a way as to withstand the weight of
the source container and the Gammapilot FMG50 under all anticipated operating
conditions.
• The sample point may not be further than 20 m (66 ft) from the measuring point.
• The distance of the density measurement to pipe bends is ≥3 x pipe diameter, and ≥10 x
pipe diameter in the case of pumps.
Measuring system arrangement
The arrangement of the source container and the Gammapilot FMG50 depends on the
pipe diameter (or the radiated length) and the density measuring range. These two
parameters determine the measuring effect (relative change in the pulse rate). The longer
the radiated length, the greater the measuring effect. Therefore, it is advisable to use
diagonal irradiation or a measuring path for small pipe diameters.
To select the measuring system arrangement please contact the Endress+Hauser sales
organization or use the Applicator™configuration software.
1)
A0018076
A Vertical beam (90°)
B Diagonal beam (30°)
C Measuring path
1 Sample point
2 Source container
3 Gammapilot FMG50
• To increase the accuracy of density measurements, the use of a collimator is
recommended. The collimator screens the detector against background radiation.
• When planning, the total weight of the measuring system must be taken into
consideration.
• An FHG51 clamping device is available as an accessory
1) The Applicator™ is available from your Endress+Hauser sales organization.
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