Omega FPR300 Series User manual

FPR310
FPR300
FPR300/310 SERIES
Low-Flow Meter
User's Guide
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It is the policy of OMEGA Engineering, Inc. to comply with all worldwide safety and EMC/EMI
regulations that apply. OMEGA is constantly pursuing certification of its products to the European New
Approach Directives. OMEGA will add the CE mark to every appropriate device upon certification.
The information contained in this document is believed to be correct, but OMEGA accepts no liability for any
errors it contains, and reserves the right to alter specifications without notice.
WARNING: These products are not designed for use in, and should not be used for, human applications.

GENERAL INFORMATION
3/8”, 1/2”, 3/4”, 1”, Female NPT thread
(SAE optional)
18 feet standard (maximum cable run 2000 ft.)
TFE
PVDF (Kynar)
Zirconia ceramic (silicon carbide optional)
TFE-coated Viton (EPDM or Kalrez optional)
Ruby ring and ball
TFE
160˚ F (70˚ C)
150 PSI (10 bar)
+1% of full scale
5-24 Vdc, 2 mA min
Current sinking pulse, 6-24 Vdc
3/8”, 1/2”, 3/4”, 1”, Female NPT thread
(SAE optional)
18 feet standard (maximum cable run 2000 ft.)
Polypropylene
PVDF (Kynar)
Nickel tungsten carbide (zirconia ceramic optional)
EPDM (Kalrez or TFE-coated Viton optional)
Ruby ring and ball
Acrylic (Polypro optional)
160˚ F (70˚ C)
150 PSI (10 bar)
+1% of full scale
5-24 Vdc, 2 mA min
Current sinking pulse, 6-24 Vdc
Connection Ports
Sensor Cable
Materials Body
Rotor
Shaft
O-Ring
Bearings
Cover
Maximum Temperature
Maximum Pressure
Accuracy
Power
Outputs
FPR300 FPR310
SPECIFICATIONS
FEATURES
Thread-in Sensor, Field Replaceable,
6-24 Vdc pulse
18’ Sensor Cable
Standard Acrylic Top (FPR300)
Removable Lens Assembly
Hex Screws
Female NPT Threads (SAE optional)
These versatile impeller flowmeters are available in 3/8",
1/2”, 3/4”, and 1" nominal pipe sizes with female NPT
threads (SAE optional). They employ jewel bearings to allow
for very low minimum flow rates and superior life.
With a body material of polypropylene, the FPR300 is an
economical choice for metering water or low corrosion fluids.
The lens cover is available in a choice of materials: acrylic
for visual flow indication of low-corrosive fluids; polypropylene
when more corrosion resistance is needed. The standard ro-
tor assembly is Kynar with tungsten carbide shaft (ceramic
shaft optional). The O-ring is EPDM.
The FPR310 offers greater chemical resistance with a TFE
body and cover, TFE-coated Viton O-ring, and standard Kynar/
ceramic rotor assembly (silicon carbide shaft optional).
The pulse output of these meters is compatible with many
different types of controls, including a full range of Omega rate
displays and controls. The Omega DPF75-A provides flow rate
and total flow indication, with 4-20 mA ouput capability.
FPR300
shown
(Internal)
Jewel bearings
Kynar/Carbide or Kynar/Ceramic Rotor Assembly
EPDM (FPR300) or TFE-coated Viton (FPR310) O-ring
FLOW RANGE
Model #
*K-Factor
Gal/Min Liter/Min (Pulses/Gal)
FPR300 FPR310
FPR301/311 1417 1394 0.07-5 0.27-18.9
FPR302/312 658 634 0.1-10 0.38-37.9
FPR303/313 468 476 0.2-20 0.75-75
FPR304/314 254 250 0.5-40 1.9-150
*Nominal K-factors (based on averages) for standard 2-magnet FPR310 and
FPR300. High resolution (6-magnet) K-factors are approximately tripled.

CONNECTIONS
Connecting to Control Devices. It is often desirable to
connect an FPR flow sensor to a PLC or industrial computer
board, and the sensors are well suited for this. Typically it
can be connected directly, or with a single resistor added.
The pickup sensors are current sinking (NPN) GMR devices
that require 5-24 Volts DC and 2 mA current. They can con-
nect directly to a PLC or computer board (See Fig. 1) if:
1. The sensor power supply on the PLC is 5 - 24 Vdc
(24 Vdc is typical).
2. The sensor power supply can provide at least 2 mA
(100 mA is typical).
3. The sensor input on the PLC can accept a current
sinking device.
4. The PLC frequency response > flow meter output
frequency.
If the PLC input only accepts current sourcing devices, a
pull-up resistor must be added (See Fig. 2). Typically, on a
24 Vdc input a 2.2 K Ohm resistor will be effective.
Since the three-wire pickup sensors are solid state, they
do not exhibit switch bounce and can be used at relatively
high frequencies.
If the PLC is equipped with a 4-20 mA analog input module,
it is necessary to order the FPR flow sensor with some form
of 4-20 mA transmitter. One option is the Omega DPF75-
A, which provides rate and total readings as well as 4-20
mA output.
Red
White
Black
Red
White
Black
Signal
+DC Voltage
Ground
Signal
+DC Voltage
Ground
Figure 1 Figure 2
Input Designed for Current
Sinking (NPN) Devices
Input Designed for Current
Sourcing (PNP) Devices
2.2K Ohm Pull-up
Resistor
NPN
Device
NPN
Device
INSTALLATION and CONNECTIONS
Red
White
Black
Red
White
Black
Signal
+DC Voltage
Ground
Signal
+DC Voltage
Ground
Figure 1 Figure 2
Input Designed for Current
Sinking (NPN) Devices
Input Designed for Current
Sourcing (PNP) Devices
2.2K Ohm Pull-up
Resistor
NPN
Device
NPN
Device
Figure 2
Input Designed for Current
Sourcing (PNP) Devices
NPN Device PNP Device
Figure 1
Input Designed for Current
Sinking (NPN) Devices
NPN Device NPN Device
Piping Requirements. Standard fittings are female NPT. If
the piping connected to the meter is metallic, care should
be taken not to overtighten. Straight pipe of at least five
diameters upstream of the meter is recommended. Verti-
cal, horizontal, or inverted (lens down) installations are all
acceptable.
Installation
K-factor on label
Warning: This meter has low-friction
bearings. Do not at any time test op-
eration of the meter with compressed
air. Doing so will subject it to rotational
speeds many times those for which it
was designed, and will certainly damage
the rotor, shaft, and/or bearings.
K-Factor. The meter is factory calibrated. The K-factor is
found on the label on the meter body and must be input
into the control/display for accurate reading. If the K-fac-
tor becomes unreadable, nominal K-factors from chart on
previous page may be used.

Sensor Replacement. The sensor ordinarily does not need
replacement unless it is electrically damaged. If replace-
ment is necessary, unthread the sensor by hand. Thread
the replacement sensor in and tighten by hand.
MAINTENANCE and REPAIR
Rotor Replacement. There is only one moving part to this
meter. The bearings are made of ruby, which rarely wears
out or needs replacement unless they have been physically
damaged by severe shock. The shaft is integrally molded
into the rotor, and shaft and rotor are replaced as one part.
(You may wish to replace the bearings, using the bearing
removal tool, while the meter is disassembled for rotor
replacement). To replace the rotor, disconnect the meter
and remove the four screws that hold the cover in place.
Lift the cover and remove the rotor (see parts diagram).
When putting in the new rotor, be sure that the ends of
the shaft are in both bearings before tightening the cover.
The rotor can be easily dropped into the bottom bearing.
Starting the shaft into the upper bearing requires a bit of
care. It is easier if the rotor is spinning, which can be done
by lightly blowing into a port. When the upper bearing plate
drops into place, hold it down and check for free spinning
(by blowing lightly) before replacing the cover. Check that
the O-ring is in its seat on the bearing plate before replacing
the cover. Replace the cover, insert the four cap screws
and tighten.
(BLACK) Power (-)
(WHITE) Signal
(RED) Power (+) 6-24 Vdc
SES SENSOR CONNECTION
Reconnect the sensor according to the diagram below.

FPR Parts Listing
FPR300 FPR310
1Body
2Flow Direction Label 19036 19036
3Bearing Assembly (2 required) 16772 16772
Bearing Removal Tool (not shown) 26108 26108
4Rotor with Shaft
Kynar/ceramic (2 magnet) 11127 11127
Kynar/carbide (2 magnet) 11129 11129
Kynar/ceramic (6 magnet, high res) 11132 11132
Kynar/cabide (6 magnet, high res) 11130 11130
5O-Ring
EPDM 25081
TFE-coated Viton® 31403
6Cover Before 5/05 After 5/05 Before 5/05 After 5/05
Polypro 16018 31007
Acrylic 16022 31006
TFE 26174 31005
7Cover Screws (4 required)
Hexscrew 25370
Screw (use with hexnut 07705) 07685
Hexnut (use with screw 07685) 07705
8Sensor
Standard 26310 26310
Micropower 29953 29953
2
1
8
3
4
5
3
6
7
PARTS LIST

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,
i m p roper 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 h a rmless from any liability or damage whatsoever arising out of the use of the
P roduct(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:
1. Purchase Order number under which the product
was PURCHASED,
2. Model and serial number of the product under
warranty, and
3. Repair instructions and/or specific problems
relative to the product.
FOR NON-WARRANTY REPAIRS, consult OMEGA
for current repair charges. Have the following
information available BEFORE contacting OMEGA:
1. Purchase Order number to cover the COST
of the repair,
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.

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