Vega DSGH, Operating Instructions Manual

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DSGH Installation and Operation Guide 27
Installation
Location considerations
When you ordered the gauge, VEGA sized the source for optimal
performance. Notify VEGA before installing the gauge if its location
differs. Satisfactory operation depends on proper location.
Vertical pipe with upward flow
Mount the measuring assembly on a vertical pipe with upward flow of the
process material. This position provides the best possible self-cleaning
action, with a minimum possibility of gas or heavy solids collecting in the
measuring section. You can mount the gauge on a horizontal pipe but a
vertical flow is preferable. Keep the velocity above five feet per second
to avoid build-up on the pipe walls and to keep the heavier solids in
suspension. This is particularly true in sludge applications.
Pump considerations
Mounting the density gauge near a pump can be good or bad depending
on the application. Check with VEGA application engineers for a
recommendation on your application.
No line hammering
The design of the density gauge requires operation in low-vibration
conditions. Install it in a location with no line hammering or excessive
vibration. Quickly changing flow conditions may cause line hammering. If
Note: Locate the source holder where process material cannot coat it.
This ensures the continuing proper operation of the source ON/
OFF mechanism (if applicable). Many regulatory bodies
(example: the U.S. NRC) require periodic testing of the ON/OFF
mechanism.
See the Radiation Safety for U.S. General and Specific
Licensees, Canadian and International Users Manual and the
Radiation Safety Manual Addendum of Reference Information
CD that came with the source holder and the appropriate
current regulations for details.