Compaq 204451-002 - UPS T2200 XR Reference Manual page 30

The PowerScope window provides the following information:
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Volts In—Located on the left side of the PowerScope window, the
Volts In section shows the voltage of utility power and a colored bar.
The color describes the power situation, either as acceptable (green),
near range limits (yellow), or out-of-range (red).
In case of extreme undervoltage or overvoltage, an alarm sounds and the
UPS switches to UPS battery power. If the colors on the display show
the input power to be in the yellow or red range, save work and close
files immediately, then resolve the problem.
If the situation persists, contact the local utility company.
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Volts Out and Load%—Located on the right side of the PowerScope
window, the Volts Out section shows the voltage of output power to the
system, and a colored bar. The color describes the power situation,
either as acceptable (green), near range limits (yellow), or out-of-range
(red).
Use the Volts Out information and the Load% value to evaluate the
utilization of the UPS.
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If the Load% value is in the yellow or red range, power
requirements demand a UPS with a higher load capacity.
❏
If the Load% value is in the red range, the UPS is overloaded and a
computer shutdown will occur in one minute or less.
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If the Load% value is in the green range, the UPS is operating
safely within the load range of the UPS.
NOTE: If the Load% value consistently exceeds 80 percent, consider adding another UPS.
CAUTION: An extended red value is a cause for concern. A system shutdown
will occur in one minute or less. Save work and close files immediately, then
resolve the problem.
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Buck and Boost—A proprietary line regulation process used when an
overvoltage or undervoltage situation occurs in the UPS. Undervoltage
is boosted to increase the voltage, and overvoltage is bucked to reduce
the voltage, thus lessening reliance on the battery.
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Bypass Circuitry—A feature of some UPS units that causes the system
load to be powered directly from the UPS input.
Operation 3-5