Omega Engineering Building Set FGM220 User Manual

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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.83  
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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 OMEGAS 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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