Super Systems eFLO User Manual
eFLO
ELECTRONIC GAS
FLOW METER
OPERATIONS MANUAL
Super Systems Inc.
www.supersystems.com
7205 Edington Drive
Cincinnati, OH 45249
513-772-0060
Fax: 513-772-9466
eFlo Electronic Flow Meter Operations Manual
Super Systems Inc.
Page 2 of 25
Super Systems Inc.
Super Systems Europe
Super Systems Mexico
Super Systems China
USA Office
Corporate Headquarters
7205 Edington Drive
Cincinnati, OH 45249
Phone: (513) 772-0060
http://www.supersystems.com
Sistemas Superiores Integrales S de RL de CV
Querétaro, QRO CP, MEXICO 76120
Phone: +52 (442) 410 9040
http://www.supersystems.com
Units 3 & 4, 17 Reddicap Trading Estate,
Sutton Coldfield, West Midlands
B75 7BU
UNITED KINGDOM
Phone: +44 (0) 121 329 2627
http://www.supersystemseurope.com
No. 335 XianXia Road
Room 308
Shanghai, CHINA
200336
Phone: +86 21 5206 5701/2
http://www.supersystems.com
eFlo Electronic Flow Meter Operations Manual
Super Systems Inc.
Page 3 of 25
Table of Contents
Introduction ..................................................................................................................................... 4
Safety Information ....................................................................................................................... 4
Specifications .................................................................................................................................. 4
Replacement Parts ......................................................................................................................... 5
Installation Procedure .................................................................................................................... 6
Mechanical Installation ............................................................................................................... 6
Electrical Connections ................................................................................................................ 7
Modbus Registers ........................................................................................................................... 8
Operating Procedure....................................................................................................................... 9
Valve Control Mode ....................................................................................................................11
Setpoint Control and Adjustment ...............................................................................................11
Flow Limit Control (Automatic Mode) ........................................................................................12
Flow Alarm .................................................................................................................................13
Flow Rate Totalizer ....................................................................................................................14
Setup ..........................................................................................................................................14
Maintenance ...................................................................................................................................14
Zero Calibration .............................................................................................................................15
Flow Rate Calibration ....................................................................................................................15
Configuration and Control Software: FlowMeterView ...................................................................17
Prerequisites and Installation ....................................................................................................17
Operation ....................................................................................................................................17
Device Menu ...............................................................................................................................18
Curves Menu...............................................................................................................................19
Update Menu ..............................................................................................................................20
About Menu ................................................................................................................................20
Troubleshooting .............................................................................................................................21
Warranty.........................................................................................................................................23
Revision History .............................................................................................................................24
Appendix 1: Electrical/Wiring Diagram .........................................................................................25
eFlo Electronic Flow Meter Operations Manual
Super Systems Inc.
Page 4 of 25
Introduction
eFlo
FlowMeterView
WARNING!
manual. Exceeding specified values could result in hazardous conditions.
Specifications
Power Required
24 VDC @ 400 mA
Accuracy
4%
Repeatability
2%
Turndown Ratio
6:1
Medium Temperature Limits
-10°F to 150°F (-20°C to 65°C)
Figure 1 - eFlo 3-
dimensional angled
view
The
instrument is Super Systems Inc.’s electronic flow meter. eFlo
works by measuring the differential pressure (the difference in pressure
of a gas at two points) of a gas flowing through a specially designed
opening in the gas flow assembly. Based on properties of the flowed gas,
the differential pressure can then be used to calculate the flow rate of
the gas.
The eFlo features built-in high and low flow rate alarms and a flow rate
totalizer. The gas flow valve can be operated in manual mode or
automatic mode. Automatic mode allows the eFlo to use a flow rate
setpoint as a basis for adjusting the valve (and thus the gas flow) using a
built-in valve motor. The setpoint can be programmed manually by the
user or obtained by the instrument from a 4-20mA analog signal or
digital signal over RS485.
eFlo is part of SSi’s Flow Meter lineup, which also includes the FLO-
®
SCOPE
manual flow meter.
This manual also covers the configuration and control software provided
with the eFlo meter: SSi
.
Safety Information
Observe the following safety requirements when configuring, operating,
servicing, or maintaining the eFlo instrumentation.
The eFlo instrument is NOT guaranteed to provide gas shutoff, nor is it designed to do so. For
reliable gas shutoff, incorporate a valve that provides positive gas shutoff. Ensure that all gas
flow equipment is in compliance with National Fire Protection Agency (NFPA) requirements,
including those found in NFPA 86. Failure to follow these requirements could result in
flammable gas leaks into the unit.
Ensure that the air and gas mixture ratio settings are within the specifications provided in this
The specifications for the eFlo instrument are as follows.
eFlo Electronic Flow Meter Operations Manual
Super Systems Inc.
Page 5 of 25
Ambient Temperature Limits
-10°F to 150°F (-20°C to 65°C)
Flow Output Signal (Linear)
4-20mA
Maximum Output Signal Load
500Ω
Input Control Signal (Linear)
4-20mA
Response Time
1 – 10 seconds
Communications
RS232, RS485
Communication Protocol
Modbus RTU
Pressure Drop @ 100% Capacity
drop.
5” wcg (Standard Model)
Flow Meter Pressure Limits
Report for more details.
5 psig – maximum allowable
Table 1 - eFlo Specifications
Replacement Parts
Part Number
Item
Explanation
33149
Motor and Shaft
Drives the Valve Needle open and
flow.
34224
O-Ring, eFlo Body & Plate
O-ring that seals the three
Bottom Plate, and Motor Plate.
37315
O-Ring, eFlo Valve Needle Shaft
O-ring that seals the Valve
Plate.
37321
Gasket, eFlo Motor Plate
Gasket that seals the eFlo Motor
and Motor.
34603
Grommet, Cylinder Adjustment
Grommet on top of the Electronic
Housing.
34692
Calibration Test Ports
Two pressure ports located on
meter.
10” wcg (Standard Model)
See Calibration Report for specific pressure
The pressure will be calibrated to userspecified requirements. See the Calibration
Replacement parts can be ordered for the eFlo unit when and if needed. Contact SSi at (513)
772-0060 to order parts.
closed to maintain the correct gas
components of the eFlo Body
(upper, lower, and middle),
Needle Shaft against the Motor
Plate to the Motor Spacer Block
the side of the Body of the meter.
These ports allow the pressure
drop to be measured for
calibration verification of the
eFlo Electronic Flow Meter Operations Manual
Super Systems Inc.
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Part Number
Item
Explanation
31182
Pressure Transducer
Measures the pressure drop
flow.
31542
Flow Board
The primary electronics board
input and output pins.
31657
Motor Control Board
The electronics board that
motor.
20823
Cable
6 foot pigtail for RS485, 4-20mA
if desired.
Table 2 - Replacement Parts List
Installation Procedure
through the Element and provides
that signal to the electronic
boards for calculation of the gas
containing all of the circuitry and
controls the operation of the
input, 4-20mA output and 24VDC
power. Note that use of the cable
is not mandatory: connections
can be made directly to terminals
Installing the eFlo unit consists of a mechanical installation and an electrical installation. The
mechanical installation includes mounting as well as inlet and outlet piping. The eFlo unit will
be assembled prior to shipment. Before beginning installation:
• Ensure that all fittings and connections are tightly secured prior to beginning
installation.
• Ensure that all expected components are present. Contact SSi at (513) 772-0060 if you
have questions.
Mechanical Installation
Secure mounting is achieved by correctly and securely installing the required piping in the inlet
and outlet connections of the eFlo unit. Note the distance between the centers of inlet and
outlet openings is 8.3” (21.1cm). The outlet openings themselves measure 1.25” NPT. The
locations of these connections are shown in Figure 2. Use of bushings or reducers at these
connections is okay as long as the maximum flow rate can still be achieved. Contact SSi at (513)
772-0060 for questions about pipe sizing.
eFlo Electronic Flow Meter Operations Manual
Super Systems Inc.
Page 7 of 25
Figure 2 - Flow Outlet and Inlet Connections
IMPORTANT!
board can be found in Appendix 1: Electrical/Wiring Diagram.)
8.30
5.00
1.40
Outlet Connection
Inlet Connection
(Opening: 1.25” NPT)
Ensure that the inlet pressure is within specified parameters for your eFlo unit.
Electrical Connections
The eFlo unit uses a male 9-pin D-Sub connector for electrical connections. The electrical
connections are defined in Table 3
(Opening: 1.25” NPT)
below. (An electrical/wiring diagram for the flow control
eFlo Electronic Flow Meter Operations Manual
Super Systems Inc.
Page 8 of 25
9-Pin D-Sub Pin
Number
Wire-In Color
Signal Type
Description
1
Red
+ VDC
Power Supply 24 VDC (250 mA)
2
Black
- VDC
3
Green
+ mA
Output Flow Signal (4 – 20 mA)
4
White
- mA
5
Orange
+ mA
Input Setpoint Signal (4 – 20 mA)
6
Blue
- mA
7
Brown
+ RS485
Communications Signal provided by
8
Yellow
- RS485
9
Purple
24V Sinking
Flow Alarm Output
NOTE: The alarm current should have a
maximum current rating of 100mA. An
back diode should
be used if the output is driving an
inductive load (such as a contactor or
horn).
Table 3 - Electrical Connections
NOTE:
Modbus Registers
Modbus Register
Number
Description
16
Actual Flow
17
Flow Sensor mA Input Value
18
Flow Setpoint
19
Decimal Place for Display of Flow and Setpoint
20
Instrument Modbus Address
21
Flow Meter Full Scale Value
22
Control Gain
23
mA Zero Value
24
mA Span Value
25
Deadband for Control
26
Setpoint Zero
27
Setpoint Span
28
Not Used
29
Analog Output Zero in Flow Units
30
Analog Output Span in Flow Units
31
Not Used
32
Low Flow Alarm Setpoint
33
High Flow Alarm Setpoint
34
Alarms
Modbus over serial.
Output
If RS-232 is needed, an additional 9-pin D-Sub connector can be set up on the eFlo unit
prior to shipment.
The eFlo Modbus registers are as follows.
isolation relay with fly-
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