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 •N o 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: • F eraloy® 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: •2 0 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 •N EC Class I, Groups C, D – Class II, Groups E, F, G – Class III • CSA Approved L O C AT I O N S 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 Power Supply Voltage Resistor “R” 12 to 16 VDC 1000 ohm 18 to 22 VDC 1500 ohm 22 to 28 VDC 2200 ohm 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 O th e r locations ALGERIA C A N A DA CHINA INDIA M a l ay s i a R U SS I A UA E 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
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