Dynasonics D300_301 Series Doppler Ultrasonic Flow Meter - Manual (Page 12)

Rev. 2/00 -2.4- 300/301
permanently mounted. Under flowing liquid
conditions, adequate signal is indicated when the
Signal LED (D21) flashes steadily.
For proper operation, there cannot be air voids
between the traducer face and pipe. The space must
be filled with a material which is a good transmitter of
sound energy such as:
SILICONE GREASE: Dow Corning 111 R or
comparable (-100 to +450 F.) The material must be
suitable not to flow at temperature of pipe. Used for
temporary survey installations and portable flow
meters.
SILICONE RUBBER: Dow Corning 732-RTV R.
Excellent for permanent bonding. This adhesive is a
recommended bonding agent and easily removable.
INSTALLATION AND PIPE PREPARATION
The cable from the DT6 transducer is provided with
either dual-coaxial cables, flexible nylon conduit or
PVC coated steel conduit with a 1/2” NPT fitting. The
coaxial cable was ordered from the factory at a
specific length UNDER NO CIRCUMSTANCES
should the coaxial cable be lengthened as this
may de-tune the circuitry and influence
performance.
Installation of the DT61 and DT63 small-pipe
transducers follow the same procedures as the DT60
and DT62 standard pipe type. The only difference is
that the small pipe transducers utilize an integral
clamping mechanism for pipe mounting and the
standard pipe units use a stainless steel strap.
Installations requiring intrinsic safety should refer to
the Appendix drawings covering these applications.
PART 2 - TRANSDUCER INSTALLATION
Acoustic Couplant
Types
Small Pipe
Transducers
Intrinsic Safety
Installations