Veris Industries FSRxxxx SERIES Install - Manual (Page 13)

FSRxxxx SERIES
Z205739-0D PAGE 13 ©2013 Veris Industries USA 800.354.8556 or +1.503.598.4564 / [email protected] 05131
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TM
INSTALLATION GUIDE
Calibration (Page 3 of 3) - Linearization
Gal/M
Delta Time
1) Please establish a
reference flow rate.
1FPS / 0.3MPS Minimum.
2) Enter the reference flow
rate below. (Do not enter 0)
3) Wait for flow to stabilize.
4) Press the Set button.
Flow:
Set
Export...
Edit
28.2
d. In the Calibration Points Editor screen, use the Add and Remove buttons as
needed. Click OK when complete.
e. The display returns to Calibration (Page 3 of 3). Click finish
f. Power cycle the unit to activate the new settings.
Mounting Transducers in Z-Mount Configuration
Installation on larger pipes requires careful measurements of the linear and radial
placement of the FST4 and FST5 transducers. Failure to properly orient and place the
transducers on the pipe may lead to weak signal strength and/or inaccurate readings.
1. Place the transducers on opposite sides of the pipe. This distance around the pipe
is calculated by multiplying the pipe diameter by 1.57. The transducer spacing
along the pipe is the same as found in the Transducer Positioning section.
2. For FST4 and FST5 transducers, place a single bead of couplant, approximately ½
inch (12 mm) thick, on the flat face of the transducer. See Figure 2.4. Generally,
a silicone-based grease is used as an acoustic couplant, but any good quality
grease-like substance that is rated to not “flow” at the temperature that the pipe
may operate at is acceptable.
3. Place the upstream transducer in position and secure with a stainless steel strap
or other fastening device. Place straps in the arched groove on the end of the
transducer. A screw is provided to help hold the transducer onto the strap. Tighten
transducer strap securely. Larger pipes may require more than one strap to reach
the circumference of the pipe.
4. Place the downstream transducer on the pipe at the calculated transducer spacing.
See Figure 2.7. Using firm hand pressure, slowly move the transducer both towards
and away from the upstream transducer while observing signal strength. Clamp
the transducer at the position where the highest signal strength is observed.
Signal strength of between 5 and 98 is acceptable. The factory default signal
strength setting is 5, however there are many application specific conditions that
may prevent the signal strength from attaining this level.
A minimum signal strength of 5 is acceptable as long as this signal level is
maintained under all flow conditions. On certain pipes, a slight twist to the
transducer may cause signal strength to rise to acceptable levels.
5. Certain pipe and liquid characteristics may cause signal strength to rise to greater
than 98. At this level, the signals may saturate the input amplifiers and cause
erratic readings. To lower the signal strength, change the transducer mounting
method to the next longest transmission path. For example, if there is excessive
signal strength and the transducers are mounted in a Z-Mount, try changing to
V-Mount or W-Mount. Finally you can also move one transducer slightly off line
with the other transducer to lower signal strength.
6. Secure the transducer with a stainless steel strap or other fastener.
TOP VIEW
OF PIPE
TOP OF PIPE
PIPE CROSS
SECTIONAL
VIEW
Distance = Pipe Outer Diameter * 1.57
Figure 2.7 - Z-Mount Transducer Placement