NUFLO Low Power Pre Amplifier Technical Data Sheet

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TECHNICAL SPECIFICATIONS

NUFLO Low Power Pre-Amplifier

Cameron’s NUFLO™ turbine flow meters offer the

significant ability to provide remote readings. However,

noisy environments can cause erroneous or false readings

at remote terminals. The easily installed NUFLO low power

pre-amplifier helps solve the problem of noise when

shielded signal cables cannot effectively eliminate them.

Electrical noise can cause erroneous readings when the

noise level equals or exceeds the meter output signal

amplitude, which generally is very low (in millivolts). The

remote reading unit might also record noise as signal

output when the flow meter is not transmitting.

The low power pre-amplifier raises the turbine flow meter

signal level at the metering point to a relatively high

level signal (6 to 8 V). Thus, the receiver can discriminate

between signal and noise and register only true signals at

the remote location.

The flow meter transmits its low-level signal through a

pair of conductors to a remote reading unit. Shielded signal

cables can help keep noise out of this system or reduce the

noise level. However, a high noise level or the length of the

transmission cable can make shielding ineffective. The

pre-amplifier helps eliminate noise problems in these instances.

Advantages

•Nolocalpowersourceisrequired.Powerissuppliedbythe

remote reading unit over the same wires that conduct the

flow meter frequency.

•Lowpowerconsumptionpermitsoperationovervirtually

unlimited transmission distances.

•Requiresasinglepairofwiresbetweenthepre-amplifier

and receiver.

•Suitableforuseinmosthazardousareas.

•Canbeinstalledwithoutspecialtoolsorequipment–

all parts have plug-in connectors or terminal screws.

•Directlycompatiblewithsignalreceivershaving

12to28VDCpoweravailable.

Specifications

Housing:

•Feraloy® with copper-free aluminum cover, complete with

union for connection to turbine flow meter

Connections:

•1”(25.4mm)rigidconduit,female

Power Required:

•12to28VDCat10mA

Input Signal:

•20mv–30Vat5Hz-3000Hz,adjustableinput

sensitivity

Output:

•6to8Vsquarewaveacrossa1000ohmresistorwith

12 V power supply at input signal frequency

Approvals

•NECClassI,GroupsC,D–ClassII,GroupsE,F,G–

ClassIII

•CSAApproved

LOCATIONS

North and South America

14450 JFK Blvd.

Houston, TX 77032

USA

Tel 1 281 582 9500

ms-us@c-a-m.com

Europe, Africa, Caspian and Russia

3 Steyning Way

Southern Cross Trading Estate

Bognor Regis

West Sussex PO22 9TT

England, UK

Tel 44 1243 826741

ms-uk@c-a-m.com

Asia Pacific

Suite 16.02 Menara AmFirst

No. 1 Jalan 19/3

46300 Petaling Jaya

Selangor Darul Ehsan

Malaysia

Tel 603 7954 0145

ms-kl@c-a-m.com

Middle East

Level 9, Al Jazira Club Tower A

PO Box 47280, Muroor Road

Abu Dhabi

United Arab Emirates

Tel 971 2 596 8400

ms-uk@c-a-m.com

OTHER LOCATIONS

ALGERIA

CANADA

CHINA

INDIA

Malaysia

RUSSIA

UAE

UK

USA

www.c-a-m.com/measurement

© 2013 Cameron | NUFLO is a trademark of Cameron. All others are registered trademarks of their respective corporations. All Rights Reserved. | SWP 2M 12/13 AD01086M

Power Supply Voltage Resistor “R”

12 to 16 VDC 1000 ohm

18 to 22 VDC 1500 ohm

22 to 28 VDC 2200 ohm