# Tip 1: How to measure the power consumption

Sometimes you need to know the amount of energy consumed by one or a group of devices.You must first obtain the value of the instantaneous power consumption.With this value is easy to calculate consumption power for a certain period of time.There are several solutions to this problem.
you need
• AC voltmeter, ammeter AC power meter.
Guide
1
In some cases, the instantaneous power consumption of the appliance is listed in his passport data.For values ​​of power consumption is over a certain period of time, multiply the instantaneous power consumption (in kw) for value unit period of time during which he worked (in hours).For example, when calculating the energy consumed by household equipped with a power consumption of 80 watts, has worked for 3.5 hours, multiply the power of the TV set (0.08 kW) for the period (3.5 hours).Get the value of the total energy consumed during that time TV: 0,08 × 3,5 = 0,28 kilowatt-hour.In the event that you need to calculate the total power consumption of a
group of devices, the power consumption is first calculated for each instrument, then the values ​​are summed.
2
To measure the instantaneous power consumption of the device are connected in parallel the plug unit AC voltmeter, and consistently - ammeter AC.Turn on the device.Read and multiply the obtained values ​​of voltage and current.For example, the resulting voltage was 218 volts and a current of 0.75 amperes: 218 × 0,75 = 163,5 Watt.Multiply this value by the amount of time during which it is worked (e.g., 6 hours) and get the value of consumed power: 6 = 0.1635 × 0,981 kilowatt-hours.
3
the presence of modern household power meter turn it into an electrical outlet.Then connect the measured current in the consumer socket located on the body of a power meter.Consider the value of instant energy.On some models, an additional power meter indicates the value of the energy consumed in the past after the time.

# Tip 2: How to measure the power

measuring of electrical power is produced by including in the circuit power meter.It is also possible to determine indirectly the power, which are made the measurements of current and voltage in the circuit.
you need
• power meter or multimeter, screwdriver, wire, knife
Guide
1
Preparatory operations.
Disconnect the electrical circuit by turning off the machine, or switch the input.Prepare a gap in an electrical circuit.To do this, unplug one of the power supply wires from the input switching device.In his place, attach the required length of wire, pre-stripping the ends of the desired length.Prepare two pieces of wire required length.The length of each wire is selected, based on the location of the electrical equipment and measuring instrument.
2
direct method of power measurement.
Connect the power meter to the circuit.Channel power plug in a prepared gap.The channel voltage to connect additional cables to the input switching device.Apply tension by turning the machine or switch.The display device, determine the amount of power consumption.
3
indirect method of measurement.
Connect multimeter prepared in open circuit.Turn the instrument to the measurement mode current.Apply a voltage by the circuit breaker.Consider the testimony of current display device and make a note of them.Turn off the power.Disconnect the meter and restore the electrical circuit in the form in which it was prior to the measurement.Energize.Set the multimeter to measure voltage.Perform measurement values ​​of the supply voltage of the device by touching the probes to the output terminals of the switching device.The resulting voltage and make a note.Calculate the power consumption , multiplying the measured current value of the voltage.If the current is measured in amperes, and volts, the resulting value will be the dimension - watts (W).
Note
All operations with assembling and dismantling should be done with a completely de-energized circuit.

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