dynasonics 902 Series User manual

ULTRASONIC FLOWMETER
Portable Enhanced Doppler
Series 902
Features
Applications
The system can be field configured to pipe sizes
ranging from 0.25 to 120 inches [6 to 3050 mm]
Non-fouling transducer is immune to build-up of
grease, paraffin and other coating materials
Solid-state measurement never requires
re-calibration and is virtually maintenance-free
Operates with relatively clean liquids as well as liquids
with concentrations of suspended solids or aeration
Does not require long straight runs of pipe
Rugged NEMA 4X design permits extended
outdoor and rough service use
Industry standard outputs allow direct interface
to loggers and controls systems
Wastewater sludges
Ground water
Flow surveying
Remote field site flow tests
Used as a flow prover to other
flow technologies
Mining recirculate
Pump output verifications
Sewage lifting station monitoring
Series 902 Portable Enhanced Ultrasonic Doppler
Flowmeters measure solids-bearing or aerated
liquids in metal or plastic pipe. Proprietary
circuitry allows this instrument to operate with
lower concentrations of suspended solids than
any competitive Doppler flowmeter--expanding
the instrument's range of applications and
reliability. Clamp-on, non-invasive transducers
permit the instrument to be installed in minutes
without interrupting system pressure or flow.
The watertight case contains a rechargeable
battery that can operate the unit continuously
for 8 hours. The Series 902 transmitter has a
full keypad designed for simple field setup
and application versatility. The two-line, backlit,
alphanumeric display shows instantaneous flow
rate and totalized flows in a variety of user
selectable engineering units.
Advanced Test Equipment Rentals
www.atecorp.com 800-404-ATEC (2832)
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ULTRASONIC FLOWMETER
Principles of Operation
Ultrasonic Doppler flowmeters operate by transmitting and receiving ultrasonic sound signals in liquids. An instrument, such as the
Dynasonics Series 902, incorporates dual transducers that are clamped on opposite sides of a liquid filled pipe. Each transducer
contains a piezoelectric crystal. Referring to the above illustration, the G1transducer transmits an ultrasonic signal through the pipe
wall into the liquid. A portion of this signal is reflected by suspended solids, entrained gases or flow turbulence moving with the
fluid, back toward the second transducer, G2.Electronic circuitry compares the transmitted frequency with the received frequency.
The difference, or frequency shift, is proportional to fluid velocity, in accordance with principles developed by Christian Johann Doppler.
If the liquid is not moving (a zero flow condition) the transmitted and received frequencies are identical.
The Series 902 features advanced signal processing and an exclusive auto-adapting digital filter to produce accurate and
stable indications of flow rate and totalized flows. A full function keypad allows field configuration of pipe size, engineering
units, the 4-20mA output and all operating parameters.
Part Number Construction
Transmitter Type
2) U.S. Units
3) Metric Units
Power Supply
A) 115 VAC
B) 230 VAC
C) 100 VAC
D) 200 VAC
E) 12 VDC
Outputs
1) 4-20 mA
Approvals
N) None
Options
N) U.S. power cord (Two spades and ground)
E) English power cord (Three rectangular spades)
G) German power cord (Two round spades)
D90
Relays
N) None (Std)
Totalizer
A) Six digit, resettable
TRANSDUCER/TRANSMITTER
(Includes: Accessory pouch, standard transducer, mounting straps, acoustic couplant and power cord.)
D-902 ACCESSORIES
D070-1006-001 High Temp Transducer
D070-1004-003 Small Pipe Transducer
D010-0200-100 Transducer cable extension, 20 feet [6 m]
Fluid Velocity }G1-G2
G2
G1
G2
G1
RECEIVING
TRANSDUCER
TRANSMITTING
TRANSDUCER
90° ELBOW
Liquids with Suspended Solids or Aeration Clean, Non-aerated Liquids
TOP VIEW OF PIPE

Series 902
Specifications
DESCRIPTION SPECIFICATION
POWER REQUIREMENTS Internal Lead acid Gel Cell battery provides 8 hrs of continuous
operation. AC charging: (Std) 115/230 VAC 50/60 Hz ±10%.
(Opt) 100/200 VAC 50/60 Hz ±10%. (Opt) 12 VDC
VELOCITY 0.5 - 20 FPS [0.15 - 6.08 MPS]
OUTPUTS 4-20 mA, 600 Ohms max., isolated.
INDICATORS Power, Signal Strength, Flow Analyzer, Fault, Over-range,
Read, Low Battery, Charge
DISPLAY 2 line x 20 character alphanumeric LCD (backlit). Digit height 0.2
inches [5 mm], 6 digit rate, 6 digit totalizer (resettable)
UNITS: User configured
RATE U.S. [METRIC] FPS, GPM, MGD [MPS, LPM, M3/hr]
TOTALIZER U.S. [METRIC] Gallons [liters, M3]
AMBIENT CONDITIONS -22 to 160°F [-30 to 70 °C], 0-95% relative
humidity, non-condensing.
ENCLOSURE NEMA 4X, [IP-65] ABS with SS hardware. 11W x 17L x 8D inches
[279W x 432L x 203D mm]
NON-LINEARITY (ACCURACY) ±2% Full Scale
SENSITIVITY 0.4% of Full Scale
REPEATABILITY ±0.4% of Full Scale
RESPONSE TIME 5-50 seconds, user configured, to 90% of value,
step change in flow.
TRANSMITTER
TRANSDUCER
DESCRIPTION SPECIFICATION
LIQUID REQUIREMENTS 25 ppm of 30 micron size* suspended solids or entrained gases (air).
*Less than this minimum will require transducer mount downstream
of a 90° elbow.
TRANSDUCER TO
TRANSMITTER DISTANCE (Std) 20 feet [6.08 meters], retractable cord.
PIPE SIZES (Std) 1 - 120 inches [25 - 3050 mm] Pipe I.D.
(Opt.) 0.25 - 1 inch [6 - 25 mm], Small Pipe Transducer
TEMPERATURE (Std) -40° to 250°F [-40° to 121°C].
(Opt) -40° to 400°F [-40° to 204°C]
HOUSING MATERIAL (Std) Aluminum, Ultem™ w/epoxy encapsulation
(High Temp) Vesped™, Aluminum
Portable Enhanced Doppler

Dimensional Specifications
ULTRASONIC FLOWMETER
Series 902
Portable Enhanced Doppler
TRANSDUCER
MAX. PIPE DIA
4-20 mA SIGNAL
POWER
11.60
[294.6]
17.50
[444.5]
INTERNAL
VACUUM/PRESSURE
RELEASE PORT
6.90
[175.3]
OPTIONAL SMALL PIPE TRANSDUCER AND CABLE ASSEMBLY
STANDARD CABLES & TRANSDUCERS CONFIGURATION
Inches
[mm]
2 COILED CABLES
STANDARD LENGTH
20 Feet [6 Meters] EACH
4.05
[102.9]
1.45
[36.8]
1.38
[35]
2 COILED CABLES
STANDARD LENGTH
20 Feet [6 Meters] EACH
4.05
[102.9]
1.38
[35]
2.85
[72.4]
1.45
[36.8]
FORM 902D00 P3M/04/00
Tel: [phone].535.3569 U.S.
Fax: [phone].732.8354 U.S.
www.dynasonics.com
2200 South Street Racine, WI 53404 U.S.A.