dynasonics TFXL series - Introduction; Application Versatility; Temperature Ratings for Transducers; User Safety

INTRODUCTION
The TFXL meter is designed to measure the fluid velocity of liquid within a closed conduit. The transducers are a non-
contacting, clamp-on or clamp-around type, which provide the benefits of non-fouling operation and ease of installation.
The TFXL meter family of transit time transmitters uses two transducers that function as both ultrasonic transmitters and
receivers. The transducers are clamped on the outside of a closed pipe at a specific distance from each other.
The transducers can be mounted in V-Mount where the sound transverses the pipe two times, W-Mount where the sound
transverses the pipe four times, or in Z-Mount where the sound crosses the pipe once. The selection of how transducers are
mounted on opposite sides of the pipe and method is based on pipe and liquid characteristics, which both have an effect
on how much signal is generated. The flow meter operates by alternately transmitting and receiving a frequency modulated
burst of sound energy between the two transducers and measuring the time interval that it takes for sound to travel between
the two transducers. The difference in the time interval measured is directly related to the velocity of the liquid in the pipe.
Application Versatility
The TFXL meter can be successfully applied on a wide range of metering applications. The simple-to-program transmitter
allows the standard product to be used on pipe sizes ranging from 1/2 …100 inches (12…2540 mm)*. A variety of liquid
applications can be accommodated:
ultrapure liquids cooling water potable water river water chemicals
plant effluent sewage reclaimed water others
Because the transducers are non-contacting and have no moving parts, the transmitter is not affected by system pressure,
fouling or wear.
Temperature Ratings for Transducers
Because the transducers are non-contacting and have no moving parts, the flow meter is not affected by system pressure,
fouling or wear. Temperature ratings for each transducer are listed below.
Transducer Temperature Rating
DTTR –40…250° F (–40…121° C)
DTTC –40…194° F (–40…90° C)
DTTN –40…194° F (–40…90° C)
DTTH –40…350° F (–40…177° C)
DTTS –40…140° F (–40…60° C)
User Safety
The TFXL meter uses a low voltage DC power source that provides electrical safety for the user. Remove the cover to access to
the meter connections and the computer interface connection.
DANGER
THE POWER SUPPLY BOARD CAN HAVE LINE VOLTAGES APPLIED TO IT, SO DISCONNECT ELECTRICAL POWER BEFORE
OPENING THE INSTRUMENT ENCLOSURE. WIRING SHOULD ALWAYS CONFORM TO LOCAL CODES AND THE NATIONAL
ELECTRICAL CODE.
Data Integrity
Non-volatile flash memory retains all user-entered configuration values in memory indefinitely, even if power is lost or
turned off.
Product Identication
The serial number and complete model number of the transmitter are located on the top outside surface of the transmitter
body. Should technical assistance be required, please provide our customer service department with this information.
Introduction
Page 10 April 2016TTM-UM-00369-EN-03