It measures the energy used by devices plugged directly into the meter, as opposed to in-home energy use displays, which display the energy used by an entire household. The LCD shows voltage; current; true, reactive, and apparent power; power factor for sinusoidal waveform ; energy consumed in kWh; and hours connected. Some models display estimated cost. The unit is manufactured by the Taiwanese company Prodigit, which also makes Vac models of similar appearance and functionality for European Schuko, U.
The basic models support current up to 15 amperes, power up to 1, VA the Vac equivalents also allow up to 15A, corresponding to 3, VA. This is the original, most basic version, based on the Prodigit M. The power setting displays instantaneous power, and the kilowatt-hour setting displays energy consumed since last reset.
When electricity is disconnected, the P's measurements and meters are reset. This is an enhanced version, based on the Prodigit , [7] which includes a backup battery to store measurements even when disconnected from electricity.
It has the same capabilities as the P, and can be programmed with electricity cost information, which enables it to display the cost of the electricity consumed since reset. From this, it can calculate cost per hour, day, week, month, or year. The basic models support current up to 15 amperes, power up to 1, VA the Vac equivalents also allow up to 15A, corresponding to 3, VA. This is the original, most basic version, based on the Prodigit M.
The power setting displays instantaneous power, and the kilowatt-hour setting displays energy consumed since last reset. When electricity is disconnected, the P's measurements and meters are reset.
This is an enhanced version, based on the Prodigit , [7] which includes a backup battery to store measurements even when disconnected from electricity. It has the same capabilities as the P, and can be programmed with electricity cost information, which enables it to display the cost of the electricity consumed since reset. From this, it can calculate cost per hour, day, week, month, or year. This model, based on the Prodigit , [8] is integrated into an eight-outlet power strip.
Unlike the other models, it does not display frequency or apparent power. From this, it can calculate cost per hour, day, week, month, or year. This model, based on the Prodigit , [8] is integrated into an eight-outlet power strip.
Unlike the other models, it does not display frequency or apparent power. It protects against surges and EMI, has a configurable overcurrent shutdown limit, and also measures earth leakage current; one version acts as an earth leakage circuit breaker ELCB. Although identical externally, there have been several different versions of the Kill A Watt and Prodigit equivalents, all essentially of the same design, but with different PCB layout, packaging, and components [11].
One shortcoming of the Kill-a-Watt range of devices is that they do not have the ability to store, transmit or transfer the readings, thus limiting their usage for any ongoing monitoring purposes. To counter this shortcoming, a couple of openly available modifications have been published on the Web, to enable these devices send data wirelessly to a receiver.
By piggybacking on the device's on-board LMN op-amp chip, the creator was able to get readings for voltage and current and transmit to a computer, which then sent this to Twitter via handle tweetawatt.
0コメント