Gamma Modulator FHG65 Synchronizer FHG66
Hauser
9
Installation requirements
General installation conditions
The Gamma Modulator FHG65 is mounted directly on the mounting flange of the source container
FQG61 or FQG62.
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CAUTION
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As the beam exit channel is not located in the middle of the source container, it is absolutely
essential to ensure the device is oriented correctly when mounting. The arrow on the mounting
plate of the Gamma Modulator must point in the direction of the transporting lug of the source
container. Measurement is not possible otherwise.
A0018532
• The source container with the Gamma Modulator must be mounted as close as possible to the tank
or measuring tube
• The unit must be mounted on a low-vibration construction
• Fasten with at least 4 M16 threaded bolts; torque:
• Steel: 210 Nm (154.88 lbf ft)
• Stainless steel: 144 Nm (106.20 lbf ft)
• When mounting, consider the total weight consisting of the source container and the Gamma
Modulator FHG65. Ensure sufficient stability is guaranteed. Provide an additional support if
necessary
• After mounting, measure the local dose rate in the vicinity of the source container and the Gamma
Modulator. Cordon off any controlled areas, see also TI00435F (FQG61/FQG62)
• The use of the modulator reduces the effectively useful horizontal angle of the beam path from 6 °
to approx. 2 °.
Check that the detector is completely covered by the radiation beam!
Mounting multiple Gamma Modulators FHG65
If multiple Gamma Modulators FHG65 are used in a measuring point, they must operate
synchronously. The Synchronizer FHG66 is used for this purpose.
The synchronization requires that all the Gamma Modulators FHG65 be aligned in the same
way. A mark is provided at the top of the Gamma Modulator FHG65 to align the units. This
mark must be aligned in the same way relative to the source container on all the Gamma
Modulators FHG65 used.
1)
For applications with the source container FQG66: contact your local Hauser sales office
