PM-PRO POWER CONDITIONER/MONITOR
7
CURRENT
AC AMPS
UNSWITCHED OUTLET
20 AMPS
POWER
2 8 14 20
- PROTECTIVE SHUTDOWN MAY OCCUR
page 8). The voltmeter provides three special flashing patterns to indicate ab-
normal power conditions:
(1) If only the single leftmost LED flashes, the input voltage is marginally low.
Power to the PM-PRO's 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 PM-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 PM-PRO has shut down power to its
switched outlets because the input voltage is in a range considered extreme.
The PM-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 the PM-PRO-E). Please note that the voltage reading is advisory only.
The PM-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.
LED AMMETER:
This three-color, 10 LED ammeter will give you a reliable indica-
tion of current draw even for highly nonlinear loads, like amplifiers and switching
power supplies. It reads AC current from 0 to 20 amps, in two-amp steps (PM-
PRO-E: 0 to 16 amps in 1.6 amp steps). When using audio power amps with the
PM-PRO, it is normal for the current draw to fluctuate considerably, increasing
on musical peaks and decreasing at quiet times. To avoid tripping the PM-PRO's
circuit breaker, adjust your levels so that the highest peaks do not exceed the
rated current.
NOTE: The Voltmeter, Ammeter, and status LEDs stay on even when the power
switch is off. This feature allows you to check voltage and current before power-
ing up your equipment. Both of these LED meters are designed for continuous,
ongoing use. They consume little power, just a few cents worth a month, much
like a clock.
UNSWITCHED OUTLET:
This outlet provides conditioned power at all times when
the PM-PRO is plugged in and operating under normal conditions.
CIRCUIT BREAKER/ON-OFF SWITCH:
This appears to be an ordinary toggle
switch, but in fact is a precision magnetic circuit breaker. Because its operation
is magnetic, not thermal, it is much more accurate in its tripping current, yet it
