Furman Prestige Série Guide De L'utilisateur page 9

high range reference. The reference point for low range is 120 volts. The reference for high range is 240 volts. When voltages fall
below range, the unit's capacity must be derated at approximately 170 milliamperes per volt. As a practical matter, to cope success-
fully with worst-case brownout conditions, one should plan the total load not to exceed 22.5 amps, or 2700 watts. Please note that
this refers to the aggregate power requirement of all equipment plugged into the P-3600 AR G, not to each individual item.
NOTE: While there is no minimum load requirement for the P-3600 AR G, you may experience an audible mechanical hum coming
directly from the unit when the power switch is on with nothing plugged in. Typically this will cease once the unit has a load of 50
watts or more.
Digital Voltage Meter:
Furman's laboratory precision AC digital voltmeter is on the front panel's left side. The voltmeter continually measures incoming
voltages within a typical tolerance of +/-1.5VAC. It should be noted that the voltage reading is determined by the incoming AC
source. Additional LED indicators PROTECTION OK, EXTREME VOLTAGE, and VOLTAGE RANGE are located on digital voltmeter lens
besides the voltage reading.
Protection OK LED Indicator:
The "Protection Ok" LED indicator is normally on. Although the Furman SMP circuit assures virtually maintenance free protection
from transient voltage spikes and surges, nature has a way of occasionally creating electrical forces that are beyond the capabili-
ties of any TVSS device. In the rare instance that this occurs, the green "Protection OK" LED indicator (located to the lower right of
the voltage meter) will not illuminate. If this happens, the P-3600 AR G's clamping ability will be compromised. If this occurrence is
encountered, please contact Furman.
Extreme Voltage Shutdown LED Indicator:
The "Extreme Voltage" LED indicator is normally off. It is located within the meter lens assembly centered directly above the blue
voltage meters LED's. During normal use the EVS indicator will not be visible.
Upon initially turning on the P-3600 AR G, the Extreme Voltage indicator will illuminate to a bright red if the input voltage is above
the extreme voltage cutoff. When this occurs, power will not be bussed to the P-3600 AR G's outlets. If the unit has been operating
with an acceptable input voltage and subsequently a voltage exceeds 145V at the lower 120V capture range or 275V at the higher
240V capture range, the unit will shut off power to the outlets and the Extreme Voltage LED will light.
NOTE: If the mains power is above a high cutoff voltage and has caused the EVS circuit to cease power to the Furman P-3600 AR G
outlets, it cannot restore power without the operator manually turning the unit off, then on again. Avoid turning the unit back on
without first checking the source of the problem and perhaps changing the AC source.
Voltage Range LED Indicator:
This tri-color Voltage Range indicator is located in the lower left corner of the digital voltage meter lens assembly. When the incom-
ing AC voltage is within the P-3600 AR G capture range, the tri-color indicator will be green (optimal), indicating the unit is in regula-
tion. However, if the regulator encounters a temporary transient condition the indicator will turn amber (caution). This amber indi-
cation appears when there are excessive changes or sudden swings at the input (+/-10 volts). If the incoming voltage is outside the
capture range, the indicator will turn red, for example below 88V or above 134V with a 100V to 120V source; below 170V or above
264V with a 208V to 240V source. Red warnings indicate the incoming voltage is far from optimal and beyond the capture range
offering a constant voltage source. In this condition, the P-3600 AR G will continue to regulate from the last tap of the autoformer,
providing an output voltage as close to 120V as possible (e.g. an input voltage of 92V would equate to 110V at output). When em-
ploying the P-3600 AR G in mission critical applications where 120V output is the primary concern, the red indication is invaluable.
True RMS Current Meter:
The Furman True RMS Current Meter is located on the front panel's right side, constantly measures the total circuit AC load, with a
typical tolerance of +/- 0.5 amps. Because the meter features True RMS technology, the current readings are accurate regardless of
load conditions (capacitive, inductive, or resistive).
Wire Fault LED Indicator:
The Wiring Fault indicator monitors a hazard common in the entertainment industry. As an example, a wiring fault can occur from
an accidental connection to open series neutral at the electrical service panel. The Wiring Fault indicator is a red LED located at the
bottom right of the current meter. This feature works in conjunction with the Furman EVS circuit ensuring maximum protection
from improperly wired circuits and improperly wired Twist-Lock connectors. If illuminated, the P-3600 AR G will NOT operate until
the wiring fault is corrected.
Temperature Range LED Indicator:
Located at the bottom left of the current meter read out, the Temperature Range LED Indicator provides diagnostic information on
the internal ambient environment of the P-3600 AR G voltage regulator. The LED is green when temperatures are within an
acceptable range for the autoformer, and may switch to amber when temperatures become less favorable.
Extreme Temperature LED Indicator:
Although many environments can be anticipated, not all can be considered or foreseen. In extremely high ambient temperatures,
combined with sustained high current draws, it is possible for the maximum allowable temperature of the P-3600 AR G to be
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