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Checking power consumption

How can I check the power consumption on a 26" LCD that I have converted to a monitor. I have a multimeter but don't know where to where to touch the leads to ck for it's power usage in watts.

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To find power usage the safest method is to buy a plug in watt meter or refer to the user manual or nameplate for the power consumption. I would not recommend using a generic multimeter to check watts. but if you want to check it you need to split the wires and put an amp clamp on the hot wire to check the amperage then use this formula to convert to watts in the US:

When Volts and Amperes are Known
POWER (WATTS) = VOLTS x AMPERES

  • We have a small server with a nameplate shows 2.5 amps. Given a normal 120 Volt, 60 hz power source and the ampere reading from equipment, make the following calculation:
POWER (WATTS) = 120 * 2.5 ANSWER: 300 WATTS

Posted on Mar 29, 2008

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You need a clamp on amp probe, a multimeter wont hack it. if you can get a amp probe, you first seperate the wires on your cord and then place the probe over one of the wires only this will give you your consumption. by the way, your approx usage of watts on a 26 inch lcd tv would be 160 watts. models do vary.

Posted on Mar 29, 2008

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