Aquametrix AM-DFA Doppler Flow Analyzer - Manual (Page 3)

Priciple of Operation
The AM-DFA Sensor transmits continuous high frequency sound through the pipe wall into the
flowing liquid. Sound is reflected back to the Sensor from particles or gas bubbles in the liq-
uid. If the liquid is flowing, the reflected sound returns at an altered frequency (the Doppler ef-
fect). The AM-DFA continuously measures this frequency shift to accurately measure flow.
Designed for “difficult” liquids
The AM-DFA Doppler flow meter works best in applica-
tions that would defeat regular contacting flow meters.
Because the Sensor is mounted on the outside of the
pipe, it is unaffected by abrasives or harsh chemicals.
There is no obstruction to flow and no pressure drop.
Easy to Install
Each AM-DFA Doppler FlowMeter includes a strap-on ultrasonic
sensor, an adjustable
stainless steel mounting clamp and sensor coupling
compound. The sensor fits on the outside of any pipe
diameter ½” (12.7 mm) or larger. It takes just a few
minutes to install. There is no need to shut down flow.
Simple, Single-Head Sensor design
Ultrasonic signals are transmitted and received
from a single-head sensor. The mounting clamp (in-
cluded) ensures correct sensor alignment on hori-
zontal or vertical pipes. The AM-DFA automatically
self-tunes to the cable length up to 500 ft. (152 m).
Works on most Pipes
The Aquametrix AM-DFA Flow Meter measures flow in PVC, carbon steel, stainless steel,
cast iron, fiberglass, and lined pipes... any pipe material that conducts ultrasound. Dop-
pler signals cannot transmit through pipe walls which contain air pockets (e.g. con-
crete or wood), or loose pipe liners (with an air gap between the liner and pipe wall).
Backlit Matrix Display with Simple, 5-key Menu System
Calibration is easy with the new AM-DFA user-friendly menu system. Press the arrow keys to scroll
through menus, change settings and enter calibration values. You can select English, French or
Spanish menus, enable a password to protect settings and control brightness of the digital display.
Reverse Flow Measurement
The AM-DFA measures flow in either direction and displays
positive or negative values. You can control the Totalizer to
subtract reverse flow, or to totalize forward flow only. The
4mA setting can also be adjusted to a negative flow setting.
Optional Data Logger with USB Thumb Drive Support
Order your AM-DFA Doppler Flow Meter with an optional
built-in 2 million point data logger. It includes Windows soft-
ware to display flow charts and tables, and to create dy-
namic flow reports. Just plug in a standard USB flash drive
and log files are downloaded automatically - and fast!
Enhanced Signal Processing for reliable Accuracy
The AM-DFA Doppler flow algorithm filters out background noise and interference. The digital
signal processor discriminates against weak and distorted signals .When the processor can-
not measure accurately the meter will display zero flow and indicate low signal confidence.
www.WaterAnalytics.net 978-749-9949 Toll free - 855-747-7623 (855-pHProbe)
Model DFM-5.0 Doppler Flow Monitor
Measures Flow with Strap-On Ultrasonic Sensor