electrical surge protection and RFI filters: AC line,
sensor, 4-20mA
power input - 100-130VAC 50/60Hz
1 Manual - Installation and Operation
DOPPLER FLOW METER SPECIFICATIONS
SCOPE: This specification covers a non-intrusive, ultrasonic
Doppler-type flow meter as manufactured by Greyline Instruments
Inc., Massena, New York / Long Sault, Ontario. The instrument
shall provide for velocity or volumetric indicating and
transmitting of the flow rate in a full pipe.
A. PERFORMANCE SPECIFICATIONS
The flow meter shall operate with a
single-head flow sensor mounted externally on any contiguous pipe material
that conducts sound including: carbon steel, stainless steel, ductile iron,
copper, FRP, PVC, ABS, or cement lined pipe from 1/2" to 180" (12.5 mm to 4.5
m) ID.
Measure and indicate flow rates between 0.2
to 40 ft/sec (0.06 to 12.2 m/sec) with accuracy of ±2% of full scale on
liquids with entrained particles or gases of 100 microns or larger and minimum
concentrations of 75 ppm
B. TRANSDUCER (FLOW SENSOR)
The flow sensor shall be single-head,
ultrasonic in a stainless steel housing. It shall be installed on the outside
of a pipe without interrupting flow. The sensor shall be capable of continuous
operation at temperatures from -40°F to 200°F (-40°C to 93°C), and to
withstand accidental submersion pressures to 10 psi. Manufacturer's
recommended coupling compound and stainless steel mounting clamp shall be
included.
Shall include 20 ft (6m) Sensor cable,
shielded coaxial pair.
Shall be capable of extending sensor cable
up to 500 ft (152m) without requirement for operator adjustment.
Shall be transformer isolated and designed
to meet intrinsic safe requirements. Shall be designed for maximum RFI
rejection, and include automatic high voltage bleeds for nearby lightning
strikes.
C. TRANSMITTER
The transmitter indicator shall be housed in
a watertight and dust tight NEMA4X (IP 66) polycarbonate enclosure with a
gasketed shatter proof window, and suitable for wall mounting.
Flow meter electronics shall be designed to
operate at temperatures from -5°F to 140°F (-20°C to 60°C). Electronic
circuits are interchangeable with other flow meters having the same model
number. The transmitter circuit and calibration frequency standard shall be
crystal controlled. The transmitter shall be powered by 100-130VAC 50/60Hz
requiring less than 7 watts.
The transmitter shall include a built-in
3-Key calibration system with operator selection of parameters through visual
prompts from a Menu calibration system. Systems requiring calibration by
Parameter codes, bcd switches or external calibrators shall not be accepted.
The 4-20mA shall be flow proportional and
isolated, with programmable zero and full scale offsets. Maximum resistive
load shall be 1000 ohms. It shall include automatic high voltage bleeds for
nearby lightning strikes.
Shall include noise suppression circuitry to
filter electrical interference.
Have a continuous 4-digit LCD display
indicating flow in user-selected engineering units. Have a 16-digit
alphanumeric display indicating totalized flow, units of calibration, and/or
signal strength.
Have 3 control relays rated 5 ampere SPDT.
Relays shall be programmable for flow proportional pulse output, or as flow
rate alarms with separate ON/OFF set points.
Have circuitry to force the outputs and
display to zero during backflow conditions by sensing a voltage-free contact
closure from a remote relay device.
D. ADDITIONAL FEATURES FOR INSERTION IN
SPECIFICATION AS REQUIRED:
Sensor, connecting cable and junction boxes
shall be rated intrinsically safe to Class I,II,III, Div. I,II, Groups
C,D,E,F,G.
Sensor cable shall be 50 ft (15m) length
shielded coaxial pair.
Sensor cable shall be 100 ft (30 m) length
shielded coaxial pair.
Have a Sensor Cable Junction Box and up to
500 ft (152m) length total shielded coaxial pair cable installed in conduit
for mechanical protection.
Have a High Temperature sensor rated for
continuous operation from -40° to 302°F (-40° to 150°C).
Have a thermostatically controlled enclosure
heater for condensation protection in locations with temperature below -5°F
(-20°C).
Have power input of 200-260VAC 50/60Hz.
Have power input of 9-36VDC.
Have a built-in 50,000 point Data Logger
with USB and RS232C output. Have USB and serial cables for data transfer to a
PC computer. Include Windows software.
E. MANUFACTURER
The instrument shall be a Model DFM 4.0
Doppler Flow Meter as manufactured by Greyline Instruments Inc., and warranted
against defects in materials and workmanship for one year.
Specifications are subject to change without
notice.
Please contact Greyline if you need more information
or for advice in your application. We can provide quotations and refer you to
the Greyline sales representative in your area. (To
receive complete information please provide your name,
mailing address, phone and fax numbers):
Canada: