User manual FURMAN AR1230

[. . . ] A precision 30 amp magnetic circuit breaker is used as the on/off switch. Be sure to reduce your load before re-powering the unit, or it will likely trip again. Refer to the previous section "Maximum Load" if you are uncertain why the breaker is tripping, or want to understand the relationship between input voltage and current vs. A fast-blow 250 mA amp fuse is located inside the unit, as previously mentioned. [. . . ] If you wish to monitor your AR-1230's output voltage more 2 AR-1230 A C L I N E V O LTA G E R E G U L AT O R than is found in spikes, but it is continuous rather than transient in nature. It is not likely to cause physical damage, but it can certainly be annoying, producing static in audio circuits, "snow" on video screens, or garbled data in computers. Noise can be introduced into AC lines by nearby radio transmitters, certain kinds of lighting, electric motors, and others. Because noise occurs at higher frequencies than the 50 or 60 Hz AC line, it can be effectively reduced through use of low-pass filtering. precisely, you may want to use a Furman PL-PLUS Power Conditioner and Light Module in conjunction with it. The PL-PLUS is the perfect complement to a Furman Voltage Regulator to assist in rack power distribution. It offers a 20-LED bar-graph line voltage meter to monitor the incoming line (the Voltage Regulator output), twin slide-out, swiveling lights with a dimmer control for equipment illumination, and eight AC outlets with their own spike/surge protection and RFI filtering. DEFINITIONS VOLTAGE REGULATION: The AC line voltage is a number indicating the nominal electrical potential that has been adopted in a region for powering electrical equipment of all kinds. In most of North America it is 117-120 volts AC; in Japan, 100 volts; and in many other countries 220, 230, or 240V. The actual voltage can fall below or rise above this nominal level due to brownouts, power cutbacks, use of substandard wiring, and other causes. A regulator is a device which, through use of a transformer, corrects the voltage deviation by stepping it up or down so that it is as close as possible to the nominal level. Though they are usually of very short duration, the energy they contain can be considerable, enough to damage sensitive solid-state components in audio and computer equipment. They are caused unpredictably by electric motors switching on or off (on the premises or outside), utility company maintenance operations, nearby lightning strikes, and other factors. Spikes (also called surges or transients) are absorbed by special components called MOV's in the AR-series to provide safe voltage levels to protect your equipment. RFI/EMI INTERFERENCE: Noise from RFI (Radio Frequency Interference) or EMI (Electro Magnetic Interference) involves lower voltages and less energy 3 OUTPUT CURRENT MONITORING The AR-1230's ammeter reads AC current from 0 to 30 amps, in 3-amp steps. Currents above the 30 amp limit read red, with yellow indicating a warning zone. Please keep in mind that the ammeter may not read at all if the total load connected is less than 2 amps (240 watts). This is a likely occurrence if only relatively low power, signal processing-type equipment is connected. With the master switch off, the ammeter can still read, but will only do so if equipment drawing at least 2 amps is connected to the unswitched outlet. The ammeter is capable of giving a reliable indication of current drawn by all kinds of equipment, thanks to its true-RMS-reading circuitry. This means that loads like power amplifiers, which are primarily capacitive and inductive, will read as accurately as purely resistive loads like heaters. Ammeters that respond only to average AC current may vary widely from RMS reading meters. DESIGN The AR-1230 uses a design based on an eight-tap toroidal autoformer. The toroidal design assures minimal leakage of stray magnetic fields, and, because of its high efficiency, a very compact size for its rating. The Voltage Regulator's circuitry monitors the incoming line voltage with each cycle, comparing it to an extremely precise voltage reference, accurate to ±0. 15%. If a voltage fluctuation requires that a different tap be selected, the new tap is electronically switched exactly at the zero-crossing, AR-1230 A C L I N E V O LTA G E R E G U L AT O R for mounting in the rack's tapped holes, and to avoid marring the front panel finish, use plastic washers under the screw heads. to avoid distorting the AC waveform. [. . . ] Input Voltage Available Output Current 31. 5 30. 0 28. 5 27. 0 25. 5 24. 0 70 80 90 100 110 120 130 140 150 160 SERVICE Before returning any equipment for repair, please be sure that it is adequately packed and cushioned against damage in shipment, and that it is insured. We suggest that you save the original packaging and use it to ship the product for servicing. Also, please enclose a note giving your name, address, phone number and a description of the problem. NOTE: All equipment being returned for repair must have a Return Authorization (RA) Number. [. . . ]