Dynasonics 701_771C Series Insertion Ultrasonic Flow Meter - Manual (Page 17)

Rev. 12/97 -16- D77X
In order to calculate the proper insertion depth of the
probe several pieces of data will have to be collected. The
following five constants defines the variables found in the
insertion depth calculation.
P =
The overall length of the probe. This measurement
is taken form the top of the probe flange to the very
tip of the sensor. Subtract 0.67" from this
measurement and record this figure.
H=
The distance from the bottom of the insertion
\retraction rod assembly flange to the outside wall
of the pipe.
T=
Is the wall thickness of the pipe. The Appendix
provides wall thickness of a wide range of pipe
sizes and schedules. If the pipe size and schedule
are not found in the appendix, your pipe supplier
should be able to provide you with this data.
I.L.=
The insertion point in the pipe. This is calculated
by multiplying the pipe inside diameter by 0.125.
M =
The distance from the top of the probe flange to the
bottom of the insertion\retraction rod assembly
flange
M= P- I.L.- T- H
To insure that the probe tip is inserted to the proper
insertion point, the distance M, which is described above
should be measured and set very carefully.
PART 2 - TRANSDUCER INSTALLATION
Important!