This manual will assist you in operating
and maintaining your OMEGA 4-20 mA
Transmitter with Display used in conjunction
with the FPD Series Oval Gear Meters. This
manual provides information on both the
Local and Remote models of the 4-20 mA
Transmitter with Display.
• Choose the Local model (mounted to
the meter) when local monitoring is required and 4-20 mA output is needed.
• Choose the Remote model when remote monitoring is required and 4-20
mA output is needed.
CAUTION
This transmitter is not FM Approved.
Therefore, use of this transmitter with
an approved metering system voids FM
Approval.
NOTE: This transmitter is loop powered,
requiring an input power supply of 8.5 to
35 volts (24 VDC is recommended).
NOTE: Setpoint calibration of the transmitter
is required for the 4-20 mA, 0-20 mA,
and 0-5 V output options.
SAFETY INSTRUCTIONS
PRODUCT DESCRIPTION
The OMEGA Remote Transmitter is a
flow totalizer and rate meter with industry
standard current loop output. The Remote
Transmitter accepts input pulses from the
FPD Series meter or other frequency generating devices, and uses those pulses to
calculate the flow total and rate in a pipeline.
The unit is loop powered, and provides a
4-20 mA analog output proportional to the
frequency signal for communication with
PLCs and other customer equipment. The
4-20 mA (or 0-20 mA) output is calibrated
under actual flow conditions with simple
push-button calibration. Auxiliary output
includes 0-5 VDC and pulse output (Reed
Switch option only). The transmitter can be
pipe or wall mounted.
The microprocessor-based electronics
have extremely low power requirements
an d are comp let ely powe red by the
4-20 loop. The electronics provides the options of local (on the meter) and/or remote
(up to 5,000 feet) display. Flow total and
rate are displayed on a large 6-digit LCD
readout with two-point floating decimal for
totals from .01 to 999,999. All operations
are easily accessed with the push buttons
on the display front panel.
• When measuring flammable liquids,
observe precautions against fire or
explosion.
• When working in hazardous environments, always exercise appropriate
safety precautions.
• When applying external power to the
transmitter, use DC power only.
• Disconnect external power to the transmitter before detaching or attaching
input or output wires.
• Ground loops between sensor and user
equipment can damage the transmitter
and can be dangerous.
• If you cannot galvanically isolate the
sensor from earth ground, you may
need to use the transmitter’s optically
isolated inputs.
• Be sure O-rings and seals are kept in
good repair.
1
INSTALLATION
CAU T I O N
Installation should be performed only by
qualified personnel, and in accordance
with local governing regulations.
Environmental
Choose a mounting location suitable for
the remote transmitter. The ideal mounting
location is where the:
• meter is as close as possible.
• mounting surface has minimal vibration.
• ambient temperature is +30°F to +140°F
(0°C to +60°C) when using remote display.
• cable lengths are minimal.
Avoid mounting locations where the remote
transmitter is:
• subject to constant exposure to water or
other liquids (occasional low-pressure
splashing will not harm unit if cable entry
points are well-sealed).
• subject to > 5g shock loading.
• facing the sun directly for long periods
of time.
• close to high voltage/current runs, DC
motors, internal combustion engines, or
frequency inverters.
Cable Guidelines
4-20mA Current Loop:
• The current loop itself is very resis-
tant to electrical noise pickup and
shielded cable is seldom needed
except in very “noisy” (electrical)
locations and/or when very long runs
(thousands of feet) are used.
Sensor Cabling:
• FPD Series Meter Sensors are sold
as part of the Remote Transmitter and
come with 20 ft. of shielded cable.
• If you require a longer cable, a 100 ft.
cable kit is available from OMEGA, or
use Belden 9363 cable. When wiring
longer lengths of cable, be sure to
connect the shield to transmitter
LOCAL-COM ONLY! (Multiple shield
connections may cause ground-loop
problems).
• Some trial and error may be needed
because of the wide variety of user
conditions. Try to keep cable lengths
short!
WIRING
The Remote Transmitter comes with 20 ft. of
cable to connect to the meter. The customer
must supply the communication loop cable.
Although the transmitter is usually powered
through the communication loop, there are
some circumstances that might require
external power.
Connecting the Equipment
1. Remove the faceplate by removing the
four (4) corner screws.
2. Attach wiring from your equipment
according to the following terminal connections and wiring diagrams, depending on your circumstances.
This terminal can supply up to approximately 2.5 mA,
continuously, to external circuitry. Typical load/line
regulation under ordinary conditions is about ± 10%
LOCAL COM: Local Common
0-5 V OUT: 0 to 5 V Voltage Output. Frequency to Analog
Output.
PULSE OUT: Pulse-Out Frequency Output Signal. It is an
“open-collector” output (also known as “n-p-n” or “current-sinking”), referenced to transmitter Local-Common
LOOP (–): 4 to 20 mA Current Loop – current into
transmitter
LOOP (+): 4 to 20 mA Current Loop – current out of transmitter
ISO-IN COM
ISO-LF IN
ISO-HF IN
HL-LF IN
COIL-A IN
COIL-B IN
HL-HF IN
EDM PWR
LOCAL COM
LOCAL COM
0-5 V OUT
PULSE OUT
LOOP (–)
LOOP (+)
Output: Customer Equipment, 0-20 mA Sensing, Built-in Loop Power Supply
1
OMEGA
Oval Gear
Meter
* Optional to use HL-HF IN.
2
WIRING DIAGRAM 1
— 4-20 mA or 0-20 mA Output —
Customer Equipment With Built-in Power Supply
Input: Reed Switch
INPUTSOUTPUTS
* HL-LF IN
Loop (+)
Local Com
Pulse Out
EDM Pwr
BlackBlueRed
PCB Assembly
OMEGA
Remote
Transmitter
CAUTION: When reassembling the faceplate, make sure that the enclosure
seal is not crimped or twisted. Do not over-tighten corner
screws (hand tighten only). Faceplate can be rotated 90°.
(current)
Min. V = 8.5
Max. V = 35
Loop (–)
(current)
Customer
Equipment
3
OMEGA
Oval Gear
Meter
(Hall Effect
Pickup)
WIRING DIAGRAM 2
— 4-20 mA or 0-20 mA Output —
Customer Equipment With Built-in Power Supply
Input: Hall Effect*
Output: Customer Equipment, 0-20 mA Sensing, Built-in Loop Power Supply
HE Power Supply
4.5 - 24 VDC
(–)
(+)
1
2
3
BlackBlue Red
INPUTSOUTPUTS
HL-HF IN
Local Com
Pulse Out
EDM Pwr
OMEGA
Remote
Transmitter
Loop (+)
Min. V = 8.5
Max. V = 35
Loop (–)
(current)
(current)
Customer
Equipment
PCB Assembly
* NOTE: Hall Effect requires dedicated power supply.
— 4-20 mA or 0-20 mA Output —
Customer Equipment Without Built-in Power Supply
Input: Reed Switch (see inputs from Diagram 1) or Hall Effect* (see inputs from Diagram 2)
Output: Customer Equipment, 0-20 mA Sensing, Separate Loop Power Supply
INPUTSOUTPUTS
OMEGA
Oval Gear
Meter
See Diagrams
1 & 2 for
connections
* NOTE: Hall Effect requires dedicated power supply.
CAUTION: When reassembling the faceplate, make sure that the enclosure
WIRING DIAGRAM 3
OMEGA
Remote
Transmitter
CAUTION: When reassembling the faceplate, make sure that the enclosure
seal is not crimped or twisted. Do not over-tighten corner
screws (hand tighten only). Faceplate can be rotated 90°.
Loop Power Supply
Typ 12-24 VDC
(+)
Loop (+)
(current)
Loop (–)
(current)
seal is not crimped or twisted. Do not over-tighten corner
screws (hand tighten only). Faceplate can be rotated 90°.
(–)
Min. V = 8.5
Max. V = 35
Equipment
Loop (–) Input
Loop (+) Input
Customer
4
WIRING DIAGRAM 4
— 0-5 V Output —
Customer Equipment Without Built-in Power Supply
Input: Reed Switch (see inputs from Diagram 1) or Hall Effect* (see inputs from Diagram 2)
Output: Customer Equipment, 0-5 V Sensing, Separate Loop Power Supply
INPUTSOUTPUTS
OMEGA
Oval Gear
Meter
See Diagrams
1 & 2 for
connections
NOTE 1: Loop power supply electrically isolated
from customer equipment.
NOTE 2: Actual value of loop current (mA) is
disregarded.
* NOTE: Hall Effect requires dedicated power supply.
OMEGA
Remote
Transmitter
Loop Power Supply
Typ 12-24 VDC
(–)
Loop (+)
Loop (–)
0-5 V Output
Local Com
CAUTION:When reassembling the faceplate, make sure
(+)
(current)
(current)
that the enclosure seal is not crimped or twisted.
Do not over-tighten corner screws (hand tighten
only). Faceplate can be rotated 90°.
Customer
Equipment
0-5 V Analog
Input (+)
Analog In
Return (–)
WIRING DIAGRAM 5
— 4-20 mA or 0-20 mA Output and Pulse Output —
Customer Equipment With Built-in Power Supply
Input: Reed Switch
Output: Customer Equipment, 0-20 mA Sensing, Frequency Sensing, Built-in Loop Power Supply
INPUTSOUTPUTS
1
OMEGA
Oval Gear
Meter
Dual
Reed Switch
NOTE 1: Loop power supply electrically isolated from
NOTE 2: Actual value of loop current (mA) is disregarded.
NOTE 3: 4-20 mA and Pulse Output option available only
* Optional to use HL-HF IN.
2
3
4
customer equipment.
with Reed Switch input.
* HL-LF IN
Local Com
OMEGA
Remote
Transmitter
Loop (+)
(current)
Min. V = 8.5
Loop (–)
CAUTION:When reassembling the faceplate, make sure
Max. V = 35
(current)
that the enclosure seal is not crimped or twisted.
Do not over-tighten corner screws (hand tighten
only). Faceplate can be rotated 90°.
Customer
Equipment
Common
Open Collector
Pulse-In
5
OPERATIONS
Computer Display
All operations are reflected in the LCD
readout. The large center digits indicate
amounts, where smaller words or “icons”
located above and below indicate specific
information regarding totals, flow, calibration
and units of measure.
Computer is on continuously and always
ready to perform. The computer is powered
by a field replaceable battery. When display
becomes dim, faded or the low battery
message appears (see below), the battery
needs to be replaced. Reference the
Maintenance Section for details.
Batch and Cumulative Totals
The computer maintains two totals. The
Cumulative Total provides continuous measurement and cannot be manually reset. The
Batch Total can be reset to measure flow
during a single use. The Cumulative Total
is labeled TOTAL 1, Batch Total is labeled
TOTAL 2 BATCH.
When the Cumulative Total reaches a
display reading of 999,999 the computer
will highlight an X10 icon. This indicates to
the operator that a zero must be added to
the 6 digits shown. When the next rollover
occurs, the computer will highlight an X100
icon. This indicates to the operator that two
zeros must be added to the 6 digits shown.
Press the DISPLAY button briefly to switch
between the TOTAL 1, TOTAL 2 BATCH
and FLOWRATE. Press DISPLAY briefly
to display the TOTAL 2 BATCH. Hold the
DISPLAY button for 3 seconds to reset the
Batch Total to zero.
When fluid is flowing through the meter, a
small propeller icon is highlighted.
NOTE: Totalization counts total units
without differentiating between gallons,
liters or field calibrated units.
Flowrate Feature
To use this feature, press and release
DISPLAY until FLOWRATE icon appears.
The factory set time base will be highlighted
to the right of FLOWRATE (M = minutes,
H = hours, D = days). When FLOWRATE
is invoked, the display will be indicating
rate of flow.
Factory and Field Calibration
All calibration information is visible to the
user as icons on the top line of the display,
above the numeric digits.
All units are configured with a “factory”
calibration. Both gallons and liters are
available (“GL” or “LT” will be displayed).
While holding the CALIBRATE button, briefly
press DISPLAY to toggle between gallons
and liters. This factory calibration (indicated
with FAC) is permanently programmed into
the computer and is not user adjustable.
NOTE: Your computer may have other units
of measure programmed into it. If so,
holding the CALIBRATE button and momentarily pressing the DISPLAY button
will toggle through all factory set units.
Other possible units are: IGL (imperial
gallon), QT (quart), CF (cubic feet), CM
(cubic meter), BL (42 gal. barrel), CC
(cubic centimeter) or OZ (ounce).
Switching between different units will not
corrupt the Total’s contents. For example,
in GL mode, the computer totalizes 10.00
gallons, if the user switches to LT mode,
the display will read 37.85 liters (the same
volume, different unit).
The “field” calibration may be set by the
user, and can be changed or modified at
any time using the calibration procedure
described in the Calibration Section. Totals
or flowrate derived from the field calibration
are invoked when the FAC icon is no longer
visible on the top line of the display.
6
CONFIGURATION
Configuration determines what information is displayed on the screen. The configuration string is a 6-digit number that
programs the computer electronics to a
specific configuration. Using the information below, the end user can change the
information displayed on the screen by
changing the configuration string.
Remote Mount Display
The default calibration and display configuration features may not be appropriate for
the user installation.
ATTENTION
ALL remote mount and replacement
displays must be configured AND calibrated before use!
Local Mount Display
The factory calibration and display configuration features are preprogrammed and
further user programming is not required.
When replacing electronic displays, they
must be configured and calibration information entered before use. If desired, the
calibration or features can be changed in
the field using the procedures described
below.
Factory Default Configuration
The configuration strings below are the
default configurations for the local mounted
display and can be used for the final configuration for replacement displays or remote
mounted displays purchased separately.
NOTE: For replacement and remote elec-
tronics, this configuration does NOT
determine the K-factor for your specific
meter. That information must still be
entered using the calibration procedure. For replacement and remote
configurations, please see Calibration
Section for more information.