watt usage

[Gord Lindsay October 11, 2016 at 7:15 pm Post count: 0]

#9648 Reply |

DROK Digital Multimeter AC 80-260V 20A Voltage Amperage Power Energy Meter,

I have rented a 400 square foot workshop that gets 220v AC service from a house (not my house) but no separate meter. Will this device track my watt usage so I can pay the house owner for the electricity I use ?
Any suggestion as to how I can do this would be appreciated.

[DrokKeymaster October 13, 2016 at 9:11 am Post count: 2971]

#9756 Reply |

Hello Gord Lindsay,
Thank you for writing in.
There are three kind of power (Active Power,Reactive power and inspecting power).
This meter is used to measure the active power.
The calculating formula for active power is P=U*I*cos.cosφ represents power factor.
The power factor of pure resistive load (e.g.incandescent lamp, heater ) is nearly 1.
The power factor of inductive and capacitive loads is between 0-1.
So when you test the pure resistive load, P is equal to or near U*I; but when you test the inductive and capacitive loads (e.g.television,computer), P< U*I. Various device is with various power factor. We are not sure which power the house owner charge for the electricity. So sorry we cannot provide suitable suggestion for you. Best regards

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