FP7002/FP7002A Flow/Temperature Transmitter
2
4
The FP7002 should not be mounted at the bottom of the pipe (the 6
o’clock position) because this is where sediment in the liquid will tend
to accumulate. The best mounting location is at or near the 12 o’clock
position, so long as bubbles are not present in the liquid. The 3 o’clock
and 9 o’clock positions are also acceptable. In an upward flowing
vertical pipe, the flowsensor can be mounted anywhere around the
pipe.
As with many flowmeters, the FP7002 requires a fully developed
flow profile in order to provide accurate readings. To insure this, a
length of straight pipe run before and after the flowmeter is required.
The amount of upstream straight pipe run that is required depends
upon the type of obstruction which is immediately upstream of the
flowsensor. See Table 2-1 for specific requirements. Downstream of the
flowsensor, in all situations, only 5 diameters of straight pipe run is
required, regardless of the downstream obstruction.
Table 2-1
Concentric reducer
15 pipe diameters
One elbow
20 pipe diameters
2 elbows, in same plane
25 pipe diameters
2 elbows, in two planes,
40 pipe diameters
or one expansion
Valves, pumps*, same plane
at least 50 pipe diameters, prefer sensor
mounted upstream
*Oscillating or reciprocating pumps, which produce flow and pressure
pulses in the flowstream, are not recommended for use with the FP7002
flowsensor.
N O T E
If you do not have the proper amount of straight pipe
run available at your desired installation location, it is
recommended to use flow straighteners to decrease the
required straight run.
The paddlewheel must be aligned with the fluid flow; the installation
fitting is supplied with an alignment tab which mates with a flat on
the base of the paddlewheel sensor to insure proper sensor alignment.
When using the PVC installation fitting, it is critical that the cap of the
sensor is threaded onto the mating fitting HAND TIGHT ONLY; use
of pipe wrenches, etc. on the plastic cap can lead to damage to the cap
and/or the installation fitting.
UPSTREAM
STRAIGHT PIPE RUN REQUIRED
OBSTRUCTION
UPSTREAM OF PADDLEWHEEL SENSOR
