User's Guide
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FMG210/220/230 SERIES
Low Flow Magnetic Flow Meter
GENERAL INFORMATION
The FMG210/220/230 Series are small electromagnetic NPT fittings are available.
low-flow flowmeters with chemically-resistant plastic wet-
ted parts and a choice of Hastelloy or platinum electrodes The FMG210/220/230 Series are 12-24 Vdc powered and
suitable for use with a variety of chemicals. Capable of come with standard pulse and analog outputs. All electron-
measuring pulsating flows from diaphragm-type metering ics are self-contained in a single compact chemically-resis-
pumps, they are designed primarily for electrically-conduc- tant housing, well suited for OEM applications.
tive chemical injection applications. The 1/4”, 3/8”, and
1/2” sizes monitor maximum flows of 1, 3, and 8 gallons These meters are also appropriate for remote monitoring of
per minute (or 4, 11, and 30 L/min), respectively. Barb or chemical volume or rate using a computer or a PLC.
FEATURES
6 ft. control cable
Strain relief
Rugged ABS plastic body
Male NPT or barb pipe fittings,
PVDF plastic
SPECIFICATIONS
ABS plastic
Materials Body
Electrodes
Platinum or Hastelloy
Viton™ (EPDM optional)
PVDF plastic
O-Ring
Fittings
12-24 Vdc, 180 mA
+/-1% of reading, plus .005 gpm (0.02 lpm)
185˚ F (85˚ C)
Power
Accuracy
Max Fluid Temperature
Maximum Pressure
Minimum Conductivity
Outputs
150 psi (@ 75˚ F)
20 microSiemens
• Frequency opto isolated 1000 pulse/liter (3785 p/g)
• 4-20 mA opto isolated passive
FLOw RANGE
SIZE
LOw FLOw CUTOFF
MINIMUM FLOw for spec accuracy
MAXIMUM FLOw
L/MIN
GAL/MIN
GAL/HR
L/MIN
GAL/MIN
GAL/HR
L/MIN
GAL/MIN
GAL/HR
-025
-038
-050
.04
.11
.26
.01
.03
.07
.60
.26
.76
1.9
.07
0.2
0.5
4.2
12
30
3.8
11
30
1
3
8
60
1.80
4.20
180
480
INSTALLATION, CONNECTIONS, and OPERATION
INSTALLATION
Mounting. The FMG210/220/230 can be supported by
its piping connections if the piping is rigid and there is no
vibration. Alternatively, the grounding studs can be used
for mounting by inserting them through pre-drilled holes.
Note the centerline distance in the dimensional drawing
on following page.
CONNECTIONS
Power and signal connections are provided by the single
4- or 6-conductor color-coded cable. See the Wiring
Connections chart on next page. In addition, it is necessary
for proper operation to ground the unit to a good quality
earth ground. Use the 12 ft. grounding wire supplied with
the unit, or if necessary, a longer wire attached to one or
both of the grounding studs. If metal piping is used, ground
connections from the grounding studs on the bottom of the
unit to both inlet and outlet pipes provide the best results
in metering accuracy. See Grounding diagrams.
CAUTION: Although this meter has an
empty pipe detection function,
under certain conditions of empty or
partially-full pipe the meter may read
a flow when there is none. If this is a
OPERATION
The newly-installed meter takes from a few seconds to a
minute for the signal to stabilize at startup, especially if it
has been dry. In normal operation, keep the meter filled with
fluid to prevent this delay. An empty pipe detection feature
will normally detect absence of liquid in the pipe and register
zero flow when the meter is mounted properly.
hazardous condition, mount the meter in such a way
as to ensure the meter will always be full of liquid.
Piping. Metallic pipe or tube, or plastic tubing, can be used
with the meter. The meter comes with male NPT or barb
fittings (see chart, next page, for sizes).
The 4-20 mA signal outputs 4 mA at zero flow and 20
mA at maximum rated flow. The standard pulse signal
is a 50% duty cycle pulse set at 1000 pulses/liter (3785
pulses/gallon).
For plastic tubing, use female NPT tubing adaptors. In
installations exposed to vibration, it is not recommended to
use the piping as the sole support for the meter, particularly
on the smaller sizes.
A minimum of 1” of straight pipe run is recommended on
the inlet side of the meter. Straight run is not necessary
on the outlet.
INSTALLATION, CONNECTIONS and GROUNDING
DIMENSIONS
L
6 FT. LONG
CONTROL CABLE,
6 CONDUCTOR
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ABS
HOUSING
3.75
5.70
2.00
2.48
12 FT. LONG
GROUNDING
WIRE WITH LUGS
(SUPPLIED)
.62
2.000
BARB or MALE NPT
PIPE FITTING,
PVDF PLASTIC
#10-24 STUDS (2),
2 EACH #10 LOCKWASHERS (316 SS)
& #10-24 HEX NUTS, (316 SS) SUPPLIED
316 SS
STAINLESS
.60
STANDARD
GROUNDING
IDEAL GROUNDING
wITH METALLIC PIPING
CONNECTIONS
RED
BLACK
+ 12 to 24 Vdc Power
- Power
GREEN
WHITE
+ Pulse Output Isolated
- Pulse Output Isolated
ORANGE + 4-20 mA Isolated
BLUE
- 4-20 mA Isolated
To Earth Ground
To Earth Ground
TROUBLESHOOTING
Problem
Probable Causes
Try...
4-20 mA loop needs an external power
supply - if missing, add it
No loop power
Analog output at 0 mA
Connect to earth ground
Unit not grounded
Analog output is 4 mA
with flow
Note flow direction arrow, reverse direction
to match
Flow reversed
Change output connection
Connect to earth ground
Change flow direction
Reversed output connections
Not grounded
No pulse output
Reversed flow
Missing or incorrect ground wire
Check for proper grounding
Flow rate incorrect
Fluid conductivity <20 microSiemens/cm Select another flow meter
Empty pipe
Install meter in vertical position
WARRANTY/DISCLAIMER
OMEGA ENGINEERING, INC. warrants this unit to be free of defects in materials and workmanship for a
period of 13 months f rom date of purchase. OMEGA’s WARRANTY adds an additional one (1) month
grace period to the normal one (1) year product warranty to cover handling and shipping time. This
ensures that OMEGA’s customers receive maximum coverage on each product.
If the unit malfunctions, it must be returned to the factory for evaluation. OMEGA’s Customer Service
Department will issue an Authorized Return (AR) number immediately upon phone or written request.
Upon examination by OMEGA, if the unit is found to be defective, it will be repaired or replaced at no
charge. OMEGA’s WARRANTY does not apply to defects resulting from any action of the purchaser,
including but not limited to mishandling, improper interfacing, operation outside of design limits,
improper repair, or unauthorized modification. This WARRANTY is VOID if the unit shows evidence of
having been tampered with or shows evidence of having been damaged as a result of excessive corrosion;
or current, heat, moisture or vibration; improper specification; misapplication; misuse or other operating
conditions outside of OMEGA’s control. Components in which wear is not warranted, include but are not
limited to contact points, fuses, and triacs.
OMEGA is pleased to offer suggestions on the use of its various products. However,
OMEGA neither assumes responsibility for any omissions or errors nor assumes liability for any
damages that result from the use of its products in accordance with information provided by
OMEGA, either verbal or written. OMEGA warrants only that the parts manufactured by the
company will be as specified and free of defects. OMEGA MAKES NO OTHER WARRANTIES OR
REPRESENTATIONS OF ANY KIND WHATSOEVER, EXPRESSED OR IMPLIED, EXCEPT THAT OF
TITLE, AND ALL IMPLIED WARRANTIES INCLUDING ANY WARRANTY OF MERCHANTABILITY
AND FITNESS FOR A PARTICULAR PURPOSE ARE HEREBY DISCLAIMED. LIMITATION OF
LIABILITY: The remedies of purchaser set forth herein are exclusive, and the total liability of
OMEGA with respect to this order, whether based on contract, warranty, negligence,
indemnification, strict liability or otherwise, shall not exceed the purchase price of the
component upon which liability is based. In no event shall OMEGA be liable for
consequential, incidental or special damages.
CONDITIONS: Equipment sold by OMEGA is not intended to be used, nor shall it be used: (1) as a “Basic
Component” under 10 CFR 21 (NRC), used in or with any nuclear installation or activity; or (2) in medical
applications or used on humans. Should any Product(s) be used in or with any nuclear installation or
activity, medical application, used on humans, or misused in any way, OMEGA assumes no responsibility
as set forth in our basic WARRANTY/DISCLAIMER language, and, additionally, purchaser will indemnify
OMEGA and hold OMEGA harmless from any liability or damage whatsoever arising out of the use of the
Product(s) in such a manner.
RETURN REQUESTS/INQUIRIES
Direct all warranty and repair requests/inquiries to the OMEGA Customer Service Department. BEFORE
RETURNING ANY PRODUCT(S) TO OMEGA, PURCHASER MUST OBTAIN AN AUTHORIZED RETURN
(AR) NUMBER FROM OMEGA’S CUSTOMER SERVICE DEPARTMENT (IN ORDER TO AVOID
PROCESSING DELAYS). The assigned AR number should then be marked on the outside of the return
package and on any correspondence.
The purchaser is responsible for shipping charges, freight, insurance and proper packaging to prevent
breakage in transit.
FOR WARRANTY RETURNS, please have the
following information available BEFORE
contacting OMEGA:
FOR NON-WARRANTY REPAIRS, consult OMEGA
for current repair charges. Have the following
information available BEFORE contacting OMEGA:
1. Purchase Order number under which the product
was PURCHASED,
1. Purchase Order number to cover the COST
of the repair,
2. Model and serial number of the product under
warranty, and
3. Repair instructions and/or specific problems
relative to the product.
2. Model and serial number of the product, and
3. Repair instructions and/or specific problems
relative to the product.
OMEGA’s policy is to make running changes, not model changes, whenever an improvement is possible. This affords
our customers the latest in technology and engineering.
OMEGA is a registered trademark of OMEGA ENGINEERING, INC.
© Copyright 2005 OMEGA ENGINEERING, INC. All rights reserved. This document may not be copied, photocopied,
reproduced, translated, or reduced to any electronic medium or machine-readable form, in whole or in part, without the
prior written consent of OMEGA ENGINEERING, INC.
Where Do I Find Everything I Need for
Process Measurement and Control?
OMEGA…Of Course!
Shop online at omega.com
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PL-OM-11748-B
10/29/07
M-4265/1207
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