electrical surge protection - AC, sensor, 4-20mA - power
input
100-130VAC 50/60Hz, 6.2 Watts maximum
1 Manual - Installation and Operation
OPEN CHANNEL FLOW MONITOR SPECIFICATIONS
SCOPE: This specification covers an ultrasonic, echo-ranging
type open channel flow meter as manufactured by Greyline
Instruments, Massena, New York / Long Sault, Ontario. This
instrument shall provide for indicating, transmitting, totalizing
and data logging of the flow rate through a flume, weir, or other
primary measuring device.
A. GENERAL
Flow Monitor to consist of an non-contacting ultrasonic
sensor, connecting cable, and a remote enclosure with
indicating, transmitting, controlling and data logging
electronics.
Measurement accuracy shall be ±0.25% and shall be
automatically temperature compensated.
Sensor cable length shall be as required by installation,
not to exceed 500 ft (152 m).
System shall have no moving parts and shall not contact
flowing water.
B. SENSING ELEMENT
Sensor shall withstand accidental submersion to 20 psi.
Sensor minimum range shall be 8"
(203.2 mm) and maximum range shall be 15 ft (4.57 m).
Sensor shall be constructed of PVC.
Sensor operating temperature shall be from -40°F to
150°F (-40°C to 65°C).
Sensor shall include integral temperature sensor.
Temperature sensors requiring separate mounting and wire
runs shall not be accepted.
C. SENSOR CONNECTING CABLE
Provide RG62AU coaxial cable, minimum length
25 ft (7.6 m),
with waterproof, potted bond to the Sensor head.
Level and temperature signals shall be conducted on one
single coaxial cable. Separate or multiple-conductor
cables shall not be accepted.
Extended sensor cable shall be RG62AU coaxial to a
maximum of 500 ft (152m). Cable shall be spliced with screw
terminal connections in manufacturers recommended steel
NEMA4 Junction Box.
Sensor cable shall be installed in grounded metal
conduit.
D. TRANSMITTER
The transmitter shall provide for field calibration to
common primary metering devices, plus allow entry of
"K" and "n" values for calibration to
nonstandard flumes, weirs or open channels.
Field-calibration shall be via built-in 3-key calibration
system with menu selection of parameters. Systems
requiring calibration by Parameter codes, BCD switches or
external calibrators shall not be accepted.
Calibration data shall be password protected and
permanently stored through power interruptions for a
minimum of 12 months.
Field calibration shall allow selection and automatic
conversion of measurement units, measurement span,
high/low flow alarm relay and flow proportional relay
pulse rates.
Transmitter shall permit field programmable damping to
smooth output in turbulent flow conditions, and
programmable rejection time to disregard false signals
from rain, wind, floating objects and spurious echoes.
Transmitter operating temperature shall be from -5° to
140°F (-20° to 60°C). Transmitter shall contain a
thermostat-controlled enclosure heater for condensation
protection below 30°F (-1°C).
Have a built-in 50,000 point data logger
with
USB and RS232C output and connecting cables. Data logger shall support
time and date-stamped logging and display daily flow
reports including total, average, minimum, maximum and
times of occurrence.
Include Windows software for data log retrieval, graphing
and export.
Transmitter shall have an isolated 4-20mA output into a
1000 ohm maximum load and user-selectable 0-5V output.
Provide 3 relay contacts rated 5 amp SPDT programmable to
operate a remote totalizer, a sampler, high-low flow
alarm plus echo loss alarm.
Provide a 4-digit LCD display scaled in user-selected
engineering units and visible without opening the
Transmitter enclosure.
Provide a 16-digit alphanumeric display for calibration
menu, running totalizer, flow reports, or error message
display of echo loss or other fault conditions.
Transmitter shall be housed in a wall-mount, watertight
NEMA4X (IP66) enclosure with hinged, clear cover.
Mounting hardware shall be included.
Transmitter Displays indicating flow rate, units of
calibration, maximum flow rate and flow totalizer shall
be visible without opening cover.
Transmitter electronics shall be surge protected on AC
power input, sensor, 0-5V and 4-20 mA output.
Transmitter power input shall be 115VAC 50/60Hz with
power consumption of 6.2 Watts or less.
E. OPTIONAL FEATURES FOR INSERTION AS REQUIRED
Electronics enclosure shall include an Intrinsic Safety
Barrier. 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.
Have a thermostat controlled Enclosure Heater for
transmitter operation at temperatures below freezing.
Have manufacturer's recommended Enclosure
Sunscreen to
permit electronics enclosure mounting in direct sunlight.
Have manufacturer's recommended Sensor Sunscreen to
permit temperature-compensated sensor mounting in direct
sunlight.
Have manufacturer's recommended sensor mounting stand.
Transmitter power input shall be
200-260VAC 50/60Hz with
maximum power consumption of 6.2 Watts or less.
Transmitter power input shall be 9-36VDC with
minimum power
consumption of 2.1 Watts.
F. MANUFACTURER
Open Channel Flow Monitor shall be Greyline Model
OCF 4.0 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: