PL-PRO POWER CONDITIONER AND LIGHT MODULEPL-PRO POWER CONDITIONER AND LIGHT MODULE
6
Front Panel Controls
DIMMER: This knob controls the brightness of both light fixtures. Turn it clockwise
to increase brightness; turn it counterclockwise to decrease brightness.
PROTECTION OK: This LED is normally on when the power to the PL-PRO’s
outlets is switched on. It monitors the integrity of the protection devices
and reports if the protection is compromised. If an extremely large spike is
encountered that exceeds the PL-PRO’s capacity, the main group of input
protectors will blow an internal fuse, causing the indicator to go out. If this LED
is not lit when the power switch is on, full protection is not functioning. Spike
protection may still exist, but will have a reduced capacity to absorb current. If
this LED is not lit, please contact the Furman Service Department.
GROUND OK: This LED is normally on when the power to the PL-PRO’s outlets
is switched on. It monitors the integrity of the grounding, and reports if the
grounding is compromised. It lights if a reasonably good safety ground exists. If
this LED is not lit when the power is on, the PL-PRO is not properly grounded.
Unplug the PL-PRO and correct the ground. (Not available on PL-PRO-E.)
EXTREME VOLTAGE SHUTDOWN: This LED is normally off. It monitors a hazard
unfortunately common in the entertainment industry: wiring faults—for example,
accidental connection to 220V where 120V is expected. The PL-PRO senses
voltages that are so high or low that operation would be impossible and shuts the
power down before damage can occur. For the PL-PRO, the cutoff voltages are
under 80V or over 140V; for the PL-PRO-E, under 160V or over 280V. Upon
initially applying power to the PL-PRO, this LED will be lit if the input voltage is
below the low cutoff or above the high cutoff, and power will not be applied to the
PL-PRO’s outlets. If the unit has been operating with an acceptable input voltage
and then that voltage goes out of the acceptable range, the PL-PRO will shut off
power to the outlet and this LED will begin flashing.
NOTE: If the mains power is below the low cutoff voltage and has caused the
PL-PRO to remove power from its outlets, the PL-PRO will not restore power to
the outlets until the mains voltage rises to more than 10V above the cutoff.
Similarly, if the mains power is above the high cutoff and has caused a
shutdown, the PL-PRO will not restore power to the outlets until the mains
voltage falls more than 10 volts below the cutoff. The reason for this is to
prevent the power oscillating on and off in marginal conditions.
LIGHT TUBES: The PL-PRO has the familiar slide-out rack lights pioneered by
Furman. A new feature exclusive to the PL-PRO automatically turns the lights
off when either light tube is pushed in. The PL-PRO’s lamps come supplied with
seven-watt night light bulbs. Replacements are available at most hardware stores
LINE V
DIMMER
PULL
FLASHING DISPLAY INDICATES OUT-OF-RAN
20 AMP POWER
CONDITIONER/
LIGHT MODULE
MODEL PL-PRO
PROTECTION
OK
GROUND
OK
EXTREME
VOLTAGE
FLASHES
WHEN
SHUT
DOWN
7
or almost anywhere household light bulbs are sold. Bulbs are easily replaced
without removing the unit from the rack. Here’s how: First, pull the light tube(s)
all the way out. Unscrew the cap on the end of each tube to get access to the
bulb. (Be careful not to push the tubes in after you have removed the caps.) To
unscrew the bulb, place your index finger across the hole on the underside of
the tube and in contact with the bulb. Use the ball of your finger to rotate the
bulb out of its socket. Then remove the bulb from the front of the light tube. Put
a new bulb in the tube, rotate it with your finger from the hole in the bottom of
the tube and replace the light tube cap(s).
NOTE: The caps and light tubes become quite warm to the touch in normal
operation. To avoid burning your fingers, allow the cap to cool completely
before unscrewing it. If you find that the heat from the tubes is excessive, try
reducing the setting of the dimmer knob. As an alternative, you may substitute
four-watt bulbs or even colored Christmas tree bulbs.
LED VOLTMETER: This three-color, 20-LED bargraph is an accurate,
self-checking AC voltmeter that continually measures normal voltages. The meter
reads from 90 to 128 volts in 2 volt steps (PL-PRO-E: 180 to 256 volts, in 4 volt
steps). The normal range voltages are indicated in green, with moderate and
extremely high or low voltages in yellow and red respectively (see chart on
page 8). The voltmeter provides three special flashing patterns to indicate
abnormal power conditions:
(1) If only the single leftmost (beneath the 90V mark) LED flashes, the input
voltage is marginally low. Power to the PL-PRO outlets will remain on unless
the incoming voltage falls below the Extreme Voltage Shutdown low cutoff.
(2) If all of the LEDs on the voltmeter flash, the input voltage is marginally high.
Power to the PL-PRO’s outlets will remain on unless the incoming voltage rises
above the Extreme Voltage Shutdown high cutoff.
(3) If none of the LEDs on the voltmeter are lit, and the Extreme Voltage LED
indicator is flashing continuously, then the PL-PRO has shut down power to its
switched outlets because the input voltage is in a range considered extreme.
The PL-PRO’s voltmeter has a basic accuracy of plus or minus two volts, and
extreme cold or heat may cause an additional one volt of error (four volts and
two volts for PL-PRO-E). Please note that the voltage reading is advisory only.
The PL-PRO does not compensate for high or low line voltage. If you frequently
move your rack to different locations, derive power from generators, use long
extension cords, travel internationally, or are in an area prone to brownouts,
you may benefit from the use of one of Furman’s AC Line Voltage Regulators.
LTS
PULL
POWERUNSWITCHED OUTLET
E — PROTECTIVE SHUTDOWN MAY OCCUR
20 AMPS
ON
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