Regal RH40, Руководство пользователя

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D is the pipe diameter
T
up
is the time for the beam traveling from upstream the transducer to the downstream transducer
T
down
is the time for the beam traveling from the downstream transducer to the upstream
transducer
ΔT = T
up
– T
down
Both flow and thermal measurements are necessary to calculate energy usage. There are two methods for
thermal energy calculation:
(1) Qt = Q x (T2 – T1) x Ct,
(2) Qt = Q x (TC2 – TC1)
The site of the transducer installation is very important . Here are some recommendations for selecting
the right site:

In order to achieve high accuracy, we recommend using a pipe with at least a 15D straight-pipe
run: upstream 10D and downstream 5D, where D is pipe diameter. A longer, upstream straight-
pipe run is best.

If there is a valve upstream and the valve is not fully open, it could generate flow disturbance.

If there is a pump upstream, we recommend a pipe with at least a 30D straight pipe run.

If the pipe is vertical, make sure the flow is going upward, not downward. Downward flow could
produce air gaps, if the flow is free fall.

If the pipe is horizontal, make sure the pipe is FULL. The transducer needs to be installed on the
side of the pipe, not on the top or bottom of the pipe.