manual - Furman Sound

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AR-20 II Voltage Regulator / power conditionerVoltage Regulators are not sensitive to smallerrors in line frequency, making them ideal foruse with generators.Maximum and Minimum LoadThe AR-20 II can handle loads totalling up to20 amperes as long as the input voltage isequal to or above 124 volts. For voltages belowthat level, its capacity must be derated at approximately10 amperes per volt. As a practicalmatter, to cope successfully with worst casebrownout conditions, you should plan your totalload so that it does not exceed 16.5 amps, or1980 watts. Please note that this refers to theaggregate power requirement of all equipmentplugged into the Voltage Regulator, not to eachindividual item.NOTE: While there is no minimum load requirementfor the AR-20 II you may experience anaudible mechanical hum coming directly from theunit when the POWER switch is on with nothingplugged in. This effect will sometimes disappearas soon as you plug in any equipment drawing 40to 50 watts total.DefinitionsVOLTAGE REGULATION: The AC line voltageis a number indicating the nominal electricalpotential that has been adopted in a regionfor powering electrical equipment of all kinds.In most of North America it is 117 volts AC; inJapan, 100 volts; and in many other countries220, 230, or 240 volts. The actual voltage canfall below or rise above this nominal level dueto brownouts, power cutbacks, use of substandardwiring, and other causes. These deviationscan cause poor performance or a malfunction.A regulator is a device which, throughuse of a transformer, corrects the voltagedeviation by stepping it up or down so that it isas close as possible to the nominal level.SPIKE: A pulse of energy on the power line.Spikes can have voltages as high as 6000volts. Though they are usually of very short duration,the energy they contain can be considerable,enough to damage sensitive solid-statecomponents in audio and computer equipment.Spikes can also foul switch contacts and degradewiring insulation. They are an unavoidablecomponent of electric power. They arecaused unpredictably by electric motors switchingon or off (on the premises or outside), utilitycompany maintenance operations, nearbylightning strikes, and other factors. Spikes (alsocalled surges or transients) are absorbed byspecial components called MOV’s in the ARseriesto provide safe voltage levels to protectyour equipment.RFI/EMI INTERFERENCE: Noise from RFI(Radio Frequency Interference) or EMI (ElectroMagnetic Interference) involves lower voltagesand less energy than is found in spikes, but it iscontinuous rather than transient in nature. It isnot likely to cause physical damage, but it cancertainly be annoying, producing static in audiocircuits, “snow” on video screens, or garbleddata in computers. Noise can be introduced intoAC lines by nearby radio transmitters, certainkinds of lighting, electric motors, and others.Because noise occurs at higher frequenciesthan the 50 or 60 Hz AC line, it can be effectivelyreduced through use of low-pass filtering.Three-Year Limited WarrantyFurman Sound, LLC., having its principal placeof business at 1690 Corporate Circle, Petaluma,CA 94954 (“Manufacturer”) warrants its AR-20 II(the “Product”) as follows:5
AR-20 II Voltage Regulator / power conditionerManufacturer warrants to the original Purchaserof the Product that the Product sold hereunderwill be free from defects in material and workmanshipfor a period of three years from thedate of purchase. The Purchaser of the productis allowed fifteen days from the date of purchaseto complete warranty registration by mail or onlineat the Furman website. If the Product doesnot conform to this Limited Warranty during thewarranty period (as herein above specified),Purchaser shall notify Manufacturer in writing ofthe claimed defects. If the defects are of suchtype and nature as to be covered by this warranty,Manufacturer shall authorize Purchaserto return the Product to the Furman factory or toan authorized Furman repair location. Warrantyclaims should be accompanied by a copy of theoriginal purchase invoice showing the purchasedate; this is not necessary if the Warranty Registrationwas completed either via the mailed inwarranty card or on-line website registration.Shipping charges to the Furman factory or toan authorized repair location must be prepaidby the Purchaser of the product. Manufacturershall, at its own expense, furnish a replacementProduct or, at Manufacturer’s option, repair thedefective Product. Return shipping chargesback to Purchaser will be paid by Manufacturer.THE FOREGOING IS IN LIEU OF ALL OTHERWARRANTIES, EXPRESS OR IMPLIED,INCLUDING BUT NOT LIMITED TO THE IM-PLIED WARRANTIES OF MERCHANTABILITYAND FITNESS FOR A PARTICULAR PUR-POSE. Manufacturer does not warrant againstdamages or defects arising out of improperor abnormal use of handling of the Product;against defects or damages arising from improperinstallation, against defects in productsor components not manufactured by Manufacturer,or against damages resulting from suchnon-Manufacturer made products or components.This warranty shall be cancelable byManufacturer at its sole discretion if the productis modified in any way without written authorizationfrom Furman Sound. This warranty alsodoes not apply to Products upon which repairshave been affected or attempted by personsother than pursuant to written authorization byManufacturer.THIS WARRANTY IS EXCLUSIVE. The soleand exclusive obligation of Manufacturer shallbe to repair or replace the defective Product inthe manner and for the period provided above.Manufacturer shall not have any other obligationwith respect to the Products or any part thereof,whether based on contract, tort, strict liability orotherwise. Under no circumstances, whetherbased on this Limited Warranty or otherwise,shall Manufacturer be liable for incidental,special, or consequential damages. Manufacturer’semployees or representatives’ ORAL OROTHER WRITTEN STATEMENTS DO NOTCONSTITUTE WARRANTIES, shall not berelied upon by Purchaser, and are not a part ofthe contract for sale or this limited warranty. ThisLimited Warranty states the entire obligation ofManufacturer with respect to the Product. If anypart of this Limited Warranty is determined to bevoid or illegal, the remainder shall remain in fullforce and effect.6
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manual - Furman Sound

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