Dynasonics D300, D301 User Manual
Series
Series D300/301
Series Series
Doppler Ultrasonic Flow Meter
Operations & Maintenance
D300/301
D300/301D300/301
Manual
REV 2/00
PART 1 - TABLE OF CONTENTS
Description Pages
Quick Start Installation 1.2-1.3
Operating Theory 1.4
Product Limitations 1.5
Model Number Matrix 1.6
Specifications 1.7
Pre-Installation Bench Test 2.1
Transducer Installation 2.2-2.6
Transmitter Installation 3.1-3.2
Electrical Connections 3.2-3.5
Power Up and Configuration 4.1
Field Calibration 4.2-4.5
Relay Adjustment 4.5
Changing Pipe Size or Flow Span 4.6-4.7
Appendix
Fluid Sound Speed Conversions
Ductile Iron Pipe Data
Cast Iron Pipe Data
Steel, SS, PVC Pipe Data
FPS to GPM Conversion Chart
Intrinsic Safety Installation
Troubleshooting Waveform s Ref.
Statement of Warranty
Service Information
Rev. 2/00 -1.1- 300/301
PART 1 - QUICK START
General
This manual contains detailed operating instructions
for all aspects of the D300/301 instrument. The
following condensed instructions are provided to
assist the operator in getting the instrument started
up and running as quickly as possible. Thi s pertains
to basic operation only. If specific instrument features
are to be used or if the installer is unfamiliar with this
type of instrument, refer to the appropriate section i n
the manual for complete details.
1. TRANSDUCER LOCATION
A. In general, select a mounting location on the
piping system with a minimum of 10 pipe
diameters (10 X the pipe inside diameter) of
straight pipe upstream and 5 straight diameters
downsteam. See Table 2.1 for additional
configurations.
B. On horizontal pipe, select a position that is
between 2 and 4 o’clock on the pipe, with 12
o’clock representing the top.
Transducer Cable
FLOW
Figure 1.1
Top View of Pipe
2. PIPE PREPARATION AND TRANSDUCER
MOUNTING
A. The piping surface, where the transducers are
to be mounted, needs to be clean and dry.
Remove loose scale, rust and paint to ensure
satisfactory acoustical bonds.
B. Loosely wrap the appropriate length of strap
around the pipe at the l ocation determined in
Step 1. Refer to Figure 1.1 for proper
orientation.
C. Apply a liberal amount of couplant onto the
transducer face. Pl ace the transducer onto the
pipe ensuring square and true placement. If
an RTV type of couplant (requiring curing
time) was utilized, allow sufficient time for
curing before applying power to the instrument.
Rev. 2/00 -1.2- 300/301
PART 1 - QUICK START
3. TRANSDUCER/POWER CONNECTIONS
A. Do not attempt to add additional cable to the
transducers.
B. Refer to the WIRING DIAGRAM in Figure 1.2
for proper power and transducer connections.
Verify proper jumper selections are in place for
the power source. See Figures 2.2 and 2.3.
4. INITIAL SETT INGS AND POWER UP
Power Connections Transducer Connections
IMPORTANT!
In order to successfully complete the configuration of
the D300/301 flow meter, the transducer must be
mounted on a pipe which is full of a flowing liquid. I t
is normal to have zero readings and no si gnal indicator LED with empty pipes or zero flow rate.
Figure 1.2
Power and Transducer
Connections
A. Adjust the GAIN control [R10] to 1/4 turn from
full counter-clockwise rotati on. Set the DAMP
control R110 to 1/2 turn from either stop.
B. Apply power to the instrument.
C. If the pipe is full of a flowing liquid, the LED
located on the bottom of the main circuit card
[D21] should begin flashing. If the LED does
not flash, gradually turn the GAIN control [R10]
clockwise until the LED just begins to flash
steadily. (Do not over adjust this setting as
ambient noise can influence readings.)
D. If possible, turn off the flow to the pipe. Verify
that the LED [D21] ceases to flash. If the LED
continues to flash when flow rate is zero, the
GAIN control [R10] is set too far clockwise and
ambient noise is influencing the readings.
Turn the control counter-clockwise until the
flashing ceases.
E. If the instrument passes steps 4C and 4D, the
basic setup of the instrument is complete.
Rev. 2/00 -1.3- 300/301
PART 1 - GENERAL
General
Operating Theory
The Dynasonics D300/301 flowmeter is designed to
measure the flow of liquids and slurries in full-pipe
closed systems. The transmitter is factory configured
to measure flow on a specific, customer specified,
pipe, where flow range and measuring units have
been supplied to the Dynasonics factory during
assembly and factory calibration. The standard
product is typically used on pipe sizes ranging from
1 - 120 inch [ 25 - 1524 mm ] pipe I.D. (With the
small pipe transducer option, the pipe size range is
0.25 - 1 inch [ 6 - 25 mm]). A variety of liquid
applications can be accommodated: sewage,
sludges, concrete, mining slurries, dredging, etc.
Because the transducers are non-contacting and
have no moving parts, the flow meter is not affected
by system pressure, fouling or wear. Standard
transducers are rated to 250°F [121°C]. Optional
high temperature transducers are rated to operate to
400°F [204°C].
The basic principle of operation is the measurement
of the frequency shift “Doppler” of a reflected
ultrasonic signal from discontinuity in the flowing
liquid. In theory, these di scontinuities can be virtuall y
any amount of suspended bubbles, solids, or
interfaces caused by turbulent flow. In practice the
degree to which this can be reliably accomplished is a
function of the sensitivity and frequency of the
transducer and associated transmitter. The
D300/301 design requires greater than 100 PPM of
suspended solids or bubbles over 100 microns in
size. Should your application be cleaner than this,
please check with factory for information on transit
time ultrasonic flowmeters. The transducer which
generates and receives the ultrasoni c signal supplies
the data to the transmitter. The transmitter processes
the signal and provides an analog and pulse output
for velocity indicating and volumetric totalizing. In
addition, the transmitter contains a signal light which
determines satisfactory operation.
Rev. 2/00 -1.4- 300/301
PART 1 - GENERAL
Measuring Limits
The flowmeter is typically used as a unidirectional
meter and is most accurate when the transducer is
mounted in the orientation detailed in this manual.
But, the meter will measure flow in both directions —
although flow direction will not be indicated or
totalized properly. The flowmeter will operate from
signals returned from turbulence alone (such as
installation directly at pump discharges or
downstream from elbows and valves); however, it
should be noted that turbulence may vary with flow
rates and result in non-linear results. The
repeatability of the device is not dependent on most
process liquids.
The flowmeter is designed to measure the flow of
liquids and slurries, as long as a small, homogeneous
quantity of entrained air or suspended solids are
present. Without the presence of continuing supply of
air or solids, the transmitted pulses are not reflected
back to the transducer and the indicator will indicate
zero flow. Also, the LED signal indicator will be
extinguished.
The signal strength light will indicate (continuously
blink) when a minimum size and concentration of
suspended particles are available for a reliable flow
reading (100 micron and 100 PPM minimum) and the
liquid is moving at least 0.1 FPS [0.03 MPS]. Most
water-based liquids can be measured from a factory
calibrated flowmeter. However, liquids with a heavy
solids level (i.e. over 2%), liquids with sound speeds
that vary from water (see Appendix of alternate
liquids list) or pipes with liners may have to be field
calibrated. This is done by adjusting the span pot
(R30 on circuit board) to make the indicator agree
with a known flow velocity or a mathematically
corrected fluid velocity. All standard indicator scales
are calibrated to customer specified units. If the scale
range or units need to changed, the process to do so
is covered in detail later in this manual.
Rev. 2/00 -1.5- 300/301
Serial Number
PART 1 - GENERAL
The D300/301 employs modular construction and
provides electrical safety for the operator. The
display face contains voltages no greater than 9 Vdc
and the metal work is electrically connected to Earth
Ground. The display face swings open to allow
access to user connections.
The serial number and complete model number of
your D300/301 is located on the inside of the
transmitter’s front cover. Shoul d technical assistance
be required, please provide the Dynasoncs’ Customer
Service Department with this information.
A part number breakdown of the transducer and
transmitter portions of the flowmeter are described
below.
Transmitter Transducer
Rev. 2/00 -1.6- 300/301
PART 1 - GENERAL
Rev. 2/00 -1.7- 300/301
PART 2 - TRANSDUCER INSTALLATION
Unpacking
Bench Test
Power Connections
After unpacking, it is recommended to save the
shipping carton and packing materials in case the
instrument is stored or re-shipped. Inspect the
equipment and carton for damage. If there is
evidence of shipping damage, notify the carrier
immediately.
The D300/301 flow meter can be checked for basic
functionality using the following
Bench Test
procedure. It is recommended that this operation be
performed before installing the transducers or
transmitter permanently.
Procedure:
1. Open the D300/301 transmitter enclosure.
2. Connect the transducer cable terminals to the
corresponding terminal block locations within the
transmitter. The R, T and corresponding G terminals are marked on the coaxial transducer cables.
See
Figure 2.1
.
3. Set the transmitter SENSE control [R10] to approximately 1/4 turn from full clockwise position.
4. Apply power.
5. Rub the face of the transducer lengthwise back
and forth with your thumb using moderate pressure. The cycle time should be 1-2 times per sec-
Transducer Connections
ond.
6. If unit is functioning properly, the RED LED located on the bottom of the main circuit card will
begin to flash and the rate display will indicate
flow readings.
7. Verify that the LED ceases to flash when the rubbing stops.
Figure 2.1
Power and Transducer
Connections
8. If the meter does not respond, increase the
SENSE control [R10] to approximately 1/2 turn
from full clockwise position. Attempt Step 5 agai n.
Bench Test is Complete
Rev. 2/00 -2.1- 300/301
PART 2 - TRANSDUCER INSTALLATION
Transducer Mounting
Locations
The following list outlines how to install the DT6
transducer for optimal performance, highest reliability
and greatest accuracy:
1. Select a transducer site at least 10 pipe diameters
downstream from bends, or fittings and 5 pipe
diameters upstream. A symmetrical flow pattern is
necessary for accuracy and repeatability over the
Table 2.1
1
1
The D300/301 syst em will provide repeatable measurements on piping systems that do not meet
these requirement s , but the accuracy
Rev. 2/00 -2.2- 300/301
of these readings may be inf luenc ed to various degrees.
PART 2 - TRANSDUCER INSTALLATION
Transducer Cable
FLOW
Figure 2.2
Top View of Pipe
operating range of the meter. Down stream from
pump or orifices, etc., locate at least 20 diameters.
See
Table 2.1
2. On horizontal pipe, select a position that is
between 2 and 4 o’clock on the pipe, with 12
o’clock representing the top. If the transducer is
to be mounted on a verti cal pipe, sel ect a section
of pipe where the flow is moving from bottom to
top (flow moving vertically down a pipe tends to
cavitate and provide unreliable operation.)
3. Mount the transducer in the orientation shown in
Figure 2.2. The flow meter will read flow in both
directions, but will be most accurate if the cable is
mounted in the orientation shown—pointing in the
primary flow direction.
4. If totalization of the measured fluid is required, the
pipe must remain full. The meter will read when
the liquid level is greater than the placement of the
transducer, but the volumetric measurement will
be based on a full pipe, so totalization will be
higher than actual.
5. The flowmeter wi ll achieve proper Doppler signals
off of turbulence; however, it I should be noted
that turbulence may not be linear with pump
speed changes, nor is the reading necessarily
accurate due to the non-uniformity of turbulence.
6. When a liquid has less than 100 PPM of 100
micron or larger particles, try mounting the
transducer within 12 inches of a pump discharge
or other source of flow turbulence or cavitation. A
reading obtained under these circumstances will
be repeatable, but not necessarily accurate or
linear.
7. It is a good practice to test the flow meter on the
piping system before permanently mounting the
transducer using RTV. Function can be verified
by applying a water soluble lubricant, such as KYJelly, and holding the transducer by hand on the
pipe in the location where the transducer will be
Rev. 2/00 -2.3- 300/301
PART 2 - TRANSDUCER INSTALLATION
permanently mounted. Under flowing liquid
conditions, adequate signal is indicated when the
Signal LED (D21) flashes steadily.
Acoustic Couplant
Types
Small Pipe
Transducers
Intrinsic Safety
Installations
For proper operation, there cannot be air voids
between the traducer face and pipe. The space must
be filled with a materi al which is a good transmitter of
sound energy such as:
SILICONE GREASE: Dow Corning 111 R or
comparable (-100 to +450 F.) T he material must be
suitable not to fl ow 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 adhesi ve 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
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 pi pe 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.
UNDER NO CIRCUMSTANCES
.
Rev. 2/00 -2.4- 300/301
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