Omega Products FMA-4103 User Manual
PROGRAMMABLE GAS MASS
FLOWMETERS AND TOTALIZERS
For Clean Gases
FMA-4100/4300 Series
U 23 Selectable
Engineering Units
(Including User Defined)
U Programmable Totalizer
U High and Low Gas
Flow Alarms
U Two Sets Programmable
SPDT Relays with
Latching Feature
U Selectable Analog
0 to 5 Vdc or
4 to 20 mA Outputs
U Internal Conversion
Factors for Up
to 32 Gases
U Digital Interface
RS232 Standard
U Automatic Sensor Zero
Offset Adjustment
(Via Digital Interface
or Local Push Button)
U Self-Diagnostic Tests
U Display Units Include
Adjustable Back Lighting
The FMA-4100/4300 Series flow rate
can be displayed in 23 different
volumetric flow or mass flow
engineering units including a user
specific selection. Flowmeters can
be programmed remotely via
RS232 or RS485 (optional).
FMA-4100/4300 flowmeters
support various functions including,
programmable flow totalizer, high
and low flow alarm, automatic zero
adjustment, 2 relay outputs, jumper
selectable 0 to 5 Vdc or 4 to 20 mA
analog outputs, status LED
diagnostic, storage of up to 10
different gas calibrations, internal
or user-specific K-factors. Display
models have local 2 lines x 16
characters LCD display with
adjustable back light provides flow,
total and diagnostic reading
simultaneously. The digital RS232
or RS485 (optional) interface
provides access to applicable
internal data including, flow, CPU
temperature, auto zero, totalizer
and alarms settings, gas table,
conversion factors and engineering
units selection, dynamic response
compensation and linearization
table adjustment. The analog
interface provides 0 to 5 Vdc or
4 to 20 mA (jumper selectable)
outputs for flow reading.
The FMA-4100/4300 supports
automatic sensor zero offset
adjustment which can be activated
locally via the maintenance push
button or remotely via digital
interface. The auto zero feature
necessitates a condition of
absolutely no flow through the
meter during the adjustment
process. Provisions are made to
either start, read, or save the
current auto zero value via digital
commands. Digital totalizer
FMA-4303,
shown smaller
than actual size.
commands include: set to zero,
start at a preset flow, assign action
to a preset value, start/stop
totalizing and read. High and Low
gas flow alarm limits can also be
preprogrammed via digital interface.
Alarm action can be assigned with
preset delay interval (0 to 3600
seconds) to activate the contact
closer (separate for high and low
alarm). Latch mode control feature
allows each relay to be latched
on or follow the corresponding
alarm status.
SPECIFICATIONS
Calibrations: Performed at standard
conditions [101.4 kPa (14.7 psia) and
21.1°C (70°F)] unless otherwise
requested or stated
Environmental (PER IEC 664):
Installation Level II; Pollution Degree II
Flow Accuracy (Including Linearity):
±1% of FS at calibration temperature
and pressure
Repeatability: ±0.15% of full scale
Flow Temperature Coefficient:
0.15% of full scale/°C or better
D-9
Flow Pressure Coefficient: 0.01% of
DIGITAL
MASS FLOW
METER
STATUS
FLOW
F: O.O1 L/min
T: 34.29 L
TR
DIGITAL
MASS FLOW
METER
STATUS
FLOW
F: O.O1 L/min
T: 34.29 L
TR
full scale/psi (6.895 kPa) or better
Turndown Ratio: 50:1
Flow Response Time: 600 ms time
constant; approximately 2 seconds to
within ±2% of set flow rate for 25 to
100% of full scale flow
Max Gas Pressure: 3447 kPa gauge
(500 psig)
Max Pressure Drop:
Max Flow ≤10 SLM: 1.28 kPa (0.18 psi)
Max Flow >10 SLM: 27.58 kPa (4 psi)
Gas and Ambient Temperature:
5 to 50°C (41 to 122°F)
Relative Gas Humidity: Up to 70%
Leak Integrity: 1 x 10
-9
SCCS He max
to the outside environment
Attitude Sensitivity: Deviation of up to
1% from stated accuracy, after re-zeroing
Output Signals: Linear 0 to 5 Vdc
(3000 Ω min load impedance); Linear
4 to 20 mA (500 Ω max loop
resistance). Max noise 20 mV
peak to peak (for 0 to 5 Vdc output)
Dimensions: mm (in)
Relay: SPDT (30 Vdc, 1A)
Transducer Input Power:
11 to 26 Vdc, 100 mV max peak to
peak output noise
Power Consumption: +12 Vdc
(200 mA max); +24 Vdc (100 mA max);
Circuit board has built-in polarity reversal protection, 300 mA resettable fuse
provide power input protection
Wetted Materials:
Standard Aluminum Models:
Anodized aluminum, brass,
316 stainless steel, FKM O-rings
Optional Stainless Steel Models:
316 stainless steel, FKM O-rings
Optional O-ring Materials:
Buna, EPR (Ethylene Propylene),
or perfluoroelastomer
Inlet and Outlet Connections:
Model FMA-4100/4300: Standard
6.35 mm (
1
⁄4") compression fittings,
for units 60 SLM and larger
9.53 mm (3⁄8")
Optional: 3.18 or 9.53 mm (1⁄8 or 3⁄8")
compression fittings
Display (FMA-4300 Models): Local
2 lines x 16 characters LCD with
adjustable backlight (2-lines of text)
Calibration Options: Standard is one
10-points NIST traceable calibration.
Optional, up to 9 additional calibrations
may be ordered at additional charge.
Contact OMEGA for additional
information
CE Compliance: EMC compliance with
89/336/EEC as amended
Emission Standard: EN 55011:1991,
Group 1
Class A Immunity Standard:
EN 55082-1:1992
D
113
(4.425)
Dimensions: mm (in)
121.2
(4.800)
124
(4.882)
90.1
(3.575)
136.2
(5.363)
28.5
(1.125)
31.2
(1.230)
35
(1.375)
Mounting
Holes 6-32
3.5
(0.140)
18
(0.720)
Mounting
Holes 6-32
3.5
(0.140)
18
(0.720)
79
(3.094)
72
(2.814)
Units ≤10 SLM Full Scale
72
(2.814)
Units >10 SLM Full Scale
(0.140)
(0.140)
3.5
3.5
D-10
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