Greyline OCF 4.0 Open
Channel Flow Monitor
Standard features include:
- sensor - Model PZ15, PVC
- sensor cable - 25 ft / 7.6 m RG62AU
coaxial
- enclosure - watertight NEMA4X (IP66)
polycarbonate
- calibration - to any flume or weir with built-in
3-button programmer, password protected
- displays - Flow/Level values - large 4-digit LCD
Totalizer/Menu/Status - 16-digit alphanumeric
- temperature compensation - automatic
- outputs - USB, RS-232C, 0-5V, isolated 4-20mA
(1000 ohm)
- data logger - 50,000 point with multi-session
and flow report capability
- PC software for data log retrieval by USB, RS2
- 32
or by dial-up connection with modems
- 1 PC software utilities disk, USB and RS-232C
cables
- 3 relays - programmable flow alarm, flow
proportional, failsafe/echo-loss
- 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.