Furman Sound PM-PRO-E - Manual (Page 6)

6 PM-PRO POWER CONDITIONER/MONITOR
PROTECTION EXTREME
OK VOLTAGE
GROUND
OK
FLASHES
WHEN
SHUT
DOWN
LINE VOLTAGE
AC VOLTS
FLASHING DISPLAY INDICATES OUT OF RANGE
90
20 AMP POWER
CONDITIONER/
MONITOR
MODEL PM-PRO
PROTECTION OK: This LED is normally on when the power to the PM-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 encoun-
tered that exceeds the PM-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 PM-PRO's outlets is
switched on. It monitors the integrity of the grounding, and reports if the ground-
ing is compromised. It lights if a reasonably good safety ground exists. If this
LED is not lit when the power is on, the PM-PRO is not properly grounded.
Unplug the PM-PRO and correct the ground. (Not available on PM-PRO-E.)
EXTREME VOLTAGE SHUTDOWN: This LED status indicator 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 PM-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 PM-
PRO, the cutoff voltages are under 80V or over 140V; for the PM-PRO-E, under
160V or over 280V. Upon initially applying power to the PM-PRO, this indicator
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 PM-PRO's outlets. If the unit has been operat-
ing within an acceptable input voltage and then that voltage goes out of the ac-
ceptable range, the PM-PRO will shut 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
PM-PRO to remove power from its outlets, the PM-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 shut-
down, the PM-PRO will not restore power to the outlets until the mains voltage
falls more than 10V below the cutoff. The reason for this is to prevent the
power oscillating on and off in marginal conditions.
LED VOLTMETER: This three-color, 20 LED bargraph is an accurate, self-check-
ing AC voltmeter that continually measures normal voltages. The meter reads
from 90 to 128 volts in 2 volt steps (PM-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
Front Panel Controls
100 110 120 128