测试工具：
This great home energy meter, helps you cut your energy consumption and save money by identify the power consumption and running costs of each individual appliances in your home. To see the consumption (or running cost) of an appliance, you simply unplug the appliance from the wall socket, plug the PM230 into the wall socket and then plug you appliance into the PM 230.
The PM230 will clearly show the amount of power appliances consume and for example, by selecting the display setting that monitors total consumption over a period, it will show just how much power is wasted leaving televisions or stereos on standby. The PM230 domestic energy meter is very easy to use and comes with clear instructions.
The PM230 has a clear LCD display whre you can select from a range of display setting including:
Time & day of the week
Present current consumption shown in amps
Power consumption display in watts
Total energy consumption recorded during measuring time displayed in kWh
Power Factor PF, True power in cos phi
Displays metered periods in hours & minutes
Voltage and frequency display in volts and hertz
Total cost of energy function
Cost of electricity in KWh (kilowatt hours)
Technical specifications: (model brennenstuhl PM 230 ) Copyright © 2004 - 2
Operating voltage: 230 volts ac 50Hz
Operating current: Maximum 13 amps
Lowest measurable current: 0.02 amps
Voltage display ( V AC ): 190 volts to 276 volts
Current display ( amps ): 0.00 A - 16.00 A
Wattage display ( watts ): 0 W - 4416 W
kWh display ( kWh ): 0.00 - 999.99 kWh
Frequency display ( Hz ): 40 - 70 Hz
Power factor display ( PF ): 0.20 - 1.00
Accuracy: ( model Brennenstuhl PM 230 from PAT Training Services Limited)
Voltage: +/- 3% of measured value
Current: +/- 3% of measured value +/- 0.04 amps
Wattage: +/- 3% of measured value +/- 10 watts
kWh: +/- 3% of measured value +/- 0.1 kWh
电脑基本配置：
PD 915 2.8G OC 4.5G
2G 红色威龙 DDR 667
80G SATA
映众8600 GS
待测电源：顺达400W，Xconnect 550W，HIPRO 400W
第一测：顺达400W电源，市场参考价：280元
待机状态功耗：155.80W
运行游戏时功耗：212.86W
满负荷运载状态下功耗：261.02W
关机后不拔电源功耗：4.66W
此款电源做工用料不俗，性价比相当高！但工厂品牌知名度不高，一直为国外不少大品牌代工生产电源。噪音控制不错，也相当节能。
第二测：Xconnect 550W [市场参考价：799元]
待机功耗：
满载下功耗：
但在关机后不拔电源插头的情况下功耗达到13W。用此电源者尽量关机后顺手把电源总开关也关闭。
此款电源转换功率相当高，用料做工顶级，外观优秀，且为模组化电源，性能相当不错，噪音也很低，但是价格偏高。
第三测：HIPRO 400W [市场参考价：380元]
据称DELL，IBM,HP均采用HIPRO电源
实测待机状态：202W
游戏状态：318W
满负荷状态功耗：337W
这款电源的做工和用料都比较顶级，但是实测过程中发现转换功率还是不高，耗电量比较大。但使用起来相当稳定，也相当静音。
