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It may do this if you have the leads to the meter connected to the wrong ends of the battery.

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Q: Why energy meter reads negative power?
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What is low power factor watt meter?

A wattmeter reads the true power of a load, regardless of its power factor.


Why is the electric watt meter connected in series with the rest of the circuits in the house?

First of all, you are referring to an energy meter, not a wattmeter. A wattmeter measures power, in watts, whereas an energy meter reads energy, in watt hours (or, more specifically, kilowatt hours). The energy company bills you for energy, not power.Having said that, the connections each instrument are the same. In fact, there are two coils inside an energy meter: a current coil, and a voltage (or potential) coil. The current coil is connected in series with the load while the voltage coil is connected in parallel with the supply voltage.The current coil measures the in-phase component of the current drawn by your load, so that the instrument always reads the true power (multiplied by time -the function of the aluminium disc) of the load -i.e. not the apparent power or reactive power.


Does electric utility meter read real power or apparent power?

Energy meters monitor the supply voltage and the in-phase component of the load current -in other words, they read true (real) power not apparent power which, when time is taken into account (i.e. by the rotation of the meter's disc), results in a measure of energy consumed.


What is a meter socket?

The electrical power that you use from the utility company has to be metered. This is done with a plug in watt meter. The meter socket is what holds the electrical watt meter. It is this meter that the meter reader reads to give you your monthly billing for the electricity that you used.


What instrument measures the amplitude of sound on a mobile?

A frequency meter is the instrument that is used to measure the amplitude of sound. It reads the energy from a sound wave.


If one test reads positive and the other one reads negative?

it's common to get a false negative, even if you are pregnant. but typically, if it reads as positive, you are pregnant


What is the meter reads number of miles driven called?

The odometer.


How can the terminals of the diode be identified using the ohmmeter?

More commonly, the RED probe is on the banded (cathode) end of a diode, when the meter reads. You can also use a high ohms range (try around 200K) with a digital ohmmeter, not all have a specific "diode" setting. So test the meter first with a known marked diode, one that has a band on 1 end. You should get a reading with the probes around 1 way, and not the other. The probe on the banded end when the meter reads is the negative lead. Usually, that's the red one. So testing future diodes, if the meter reads, the red is the cathode of the diode. The polarity of the voltage appearing between the probes of digital and most analogue meters is opposite. The red lead of a digital meter is positive on the ohms ranges, while on most analogue meters the red lead is negative on the ohms ranges.


What does a con ed meter reader do?

Reads meters for Con Edison


How to decide which is positive 6 volt dc equipment polarity test?

Apply your meter leads following standard red is positive and black is negative set your meter on dc volts touch leads to ends of battery if meter reads 6 v , the pole with the red lead is positive. If the meter spikes below zero than the black lead is on the positive pole.


How do you measure the voltage on a car alternator?

get a multi meter that reads dc voltage & touch the black (negative -) wire to the negative battery post & the red (positive +) wire to the positive battery post with car running. car off is battery voltage, car on is alternator voltage.


If a speaker reads at 112 dB1 watt1 meter how much power would need to be applied to give an output of 112 dB at 1 meter?

I think this question answers itself. If a speaker produces 112 db at 1 watt and measured at 1 meter distance, then obviously 1 watt is needed to produce 112db at 1 meter.