User's Manual

Power Monitoring 83
NOTE: Power Center can read the power consumption of a device when it is at S0
(On) state. For devices in S4/S5 state, Power Center uses a fixed value (30W) to
calculate the power consumption.
• Cooling Energy — The estimated energy consumption and cost needed to
cool the selected device/group.
Cooling Energy = IT Equipment Energy * Cooling Multiplier
You can configure the cooling multiplier in the Settings → Energy
Consumption
page.
• Energy Consumed (Total)
— The combined energy consumption and
costs for the IT equipment and cooling energy. The calculation formula is:
Cost = (IT Equipment Energy T1*Cooling Multiplier) *Flat Rate T1+(IT
Equipment Energy T2*Cooling Multiplier) *Flat Rate T2+°¦+(IT
Equipment Energy Tn*Cooling Multiplier) *Flat Rate Tn
NOTE: T1/T2/.../Tn is the time period (in hours) at a certain flat rate.
NOTE: By default, the Cost column displays 0. You must configure the cost rate to
see the cost. The rate is a global setting, and can be set on the Settings → Energy
Consumption page.
NOTE: The Energy Consumption section displays information based on the values
configured in the Settings page. This information should be used as an estimate
only.
NOTE: When a device or group is newly added or created in Power Center, the
power and energy consumption data displayed in the "1W" and "1M" time windows
are different if the monitored time is less than 1 week, and the data displayed in the
"1H" and "1D" time windows are different if the monitored time is less than 1 day. This
occurs because Power Center uses different sampling intervals for different time
windows. For example, a device is added into Power Center at 2011-10-15 09:00, and
the current time is 2011-10-17 11:10. For the 1M time window (sampling interval is 1
day), the power and energy consumption is calculated from 2011-09-17 00:00 to
2011-10-17 00:00. For the 1W time window (sampling time is 1 hour), the power and
energy consumption is calculated from 2011-10-10 11:00 to 2011-10-17 11:00. There
is a 11 hour gap therefore the data displayed in the two time windows are not the
same.
Monitoring PDU Power
There are two scenarios for monitoring the PDU power:
OpenManagePowerCenter_User_Guide.book Page 83 Friday, March 2, 2012 10:33 AM