Teledyne ULTRAFLOW 150, Operation Manual, Page: 11 / 162

SECTION 2.0, SYSTEM OVERVIEW
The stack geometry, wall thickness, and mounting details determine the
length of the Purge Nozzle Assemblies.
Mounting of the assembly is accomplished using four 1/2-13 threaded rods
and nuts to hold the flange seal and squeeze ring in place. A quick
disconnect latching mechanism secures the assembly to the threaded rods.
Electrical connections include those from the Transducer Housing
Subassembly BNC connector and from the purge sensor switch. Both the
transducer coax cable and the purge air sensor cable are housed in a single
length of 3/4" flexible conduit connected from the rear of the Purge
Nozzle Assembly to the junction box.
2.1.2.1 Transducer Assemblies
The wide variety of user stack geometry, effluent composition and effluent
temperatures require that several different types of ultrasonic transducers
be employed to meet individual user requirements. Decisions on which
transducer type is appropriate for your particular application are made by
the Teledyne Monitor Labs factory based on information supplied by the
user prior to factory configuration and checkout. Documentation of the
transducer type for your particular monitor is included as part of Appendix
A of this manual.
2.1.2.1.1 Electrostatic Transducer
The Electrostatic Transducer is used in the majority of all Ultraflow 150
applications. It is typically employed in instrument pathlengths less than
26 feet (8 meters). Its electrostatic characteristics maximize sampling
accuracy at short to moderate pathlengths and in low to moderate acoustic
attenuation conditions.
Consult the Site Specification Data sheet of Appendix A for information on
the transducer type of your individual monitor.
2.1.2.1.2 Long Range Transducer (LR003)
The LR003 Transducer is employed where the instrument pathlengths are
about 30 to 50 feet (9-15 meters). Additional sample medium
characteristics may present acoustic attenuation conditions that reduce the
ultrasonic signal strength of the Standard Transducer below acceptable
levels. This may require the use of the LR003 at some pathlengths less
than 30 feet (9 meters). Long Range Transducers are capable of higher
drive (transmit) energies and have horn designs unique to their operating
frequencies.
Consult the Site Specification Data sheet of Appendix A for information on
the transducer type of your individual monitor.
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