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Chapter 2: Installation
Location considerations
When you ordered the W-4510 Weigh Scale, the source was sized for optimal performance.
Notify Ohmart prior to installation of the gauge if the location of the gauge is different from the
original order location. Proper location of the density gauge can sometimes mean the
difference between satisfactory and unsatisfactory operation.
Avoid source cross-talk
When multiple adjacent conveyors have nuclear gauges, you must consider the orientation of
the source beams so that each detector senses radiation only from its appropriate source.
The best orientation, in this case, is for the source holders to be on the inside with radiation
beams pointing away from each other.
Blending applications
Place the scale on a flat or trough conveyor. The scale can also accommodate any conveyor
inclination angle. However, you must determine the exact location of the scale when ordering
the scale and adhere to the original location as ordered. A changing profile causes unwanted
measurement error. Some rotary feed systems tend to cause loading variations with time.
Prevent process accumulation
Prevent process material or dirt from accumulating between the source and the detector.
Such accumulation can cause the gauge to indicate a higher weight than actual.
W-4510 Weigh Scale Technical Reference Manual
Note: Try to locate the source holder in such a place that process
material will not coat it. This ensures the continuing proper operation
of the source ON/OFF mechanism. Many regulatory agencies (for
example, the U.S. NRC) require periodic testing of the ON/OFF
mechanism. Refer to the "Radiation Safety for U.S. General and
Specific Licensees, Canadian and International Users" and the
"Radiation Safety Manual Reference Addendum" CD that came with
the source holder and the appropriate current regulations for details.
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