How can I measure frequency using this meter? Alda avd 830d

It depends on what you are using to measure the voltage. Cheap meters can do this. You need a true RMS meter to read these properly. Most inverters use Modified Sine Wave technology which mimics a sine wave poorly and cheap meters do not respond well to the waveform. There is likely nothing wrong with the inverter.

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look I'm going to tell you now. If you have no idea where to measure the voltage then you shouldn't be playing with that radio. First ,you need a scope,a frequency counter,a distortion meter,a signal generator,a watt meter,a voltmeter,a sinad meter and patience. If you have none of these then don't mess with it.

Standing wave ratio is standing wave ratio. This meter is not reading based on frequency. It is reading based on the measurement of electrical energy. I see no reason why it wouldn't work.

NEVER USE A METER WITCH IS RATED FOR LESS THAN THE VOLTAGE TOBE MEASURED
THERE IS A POSSIBILITY OF SERIOUS INJURY A READING OF 50 HZ WOULD NOT BE AN ITEM FRON NORTH AMERICA THIS IS AN INDICATION OF A EUROPEAN PRODUCT THERE ARE HZ METERS TO COVER THESE FREQUENCIES BUT I DON'T KNOW IF THIS CAN BE INCORPERATED IN ONE METER.

Those voltage readings MAY be normal.

The AC waveform may cause your meter to read inaccurately. You would need to use a TRUE RMS meter to accurately read the voltage.

The siple meters actually read the AVERAGE voltage and then are calibrated to mulltiply it by the "form factor" for a sine wave. OFTEN these generators don't produce a clean sine wave. A square-ish wave will read higher on the garden variety meters.

Compare the brightness of a lamp comparing to when run on your utility.

The frequency depends on engine speed ... yours is running a bit fast...check it under at least half load and if off, adjust the govenor slightly.

The rms voltage is what counts, because it tells how much power the output will deliver to a resistive load. Inexpensive multimeters on their AC ranges are usually average-responding rms-calibrated meters. This means they measure the average of the absolute value of the AC component of the signal, and display that average multiplied by about 1.11 (actually, pi over sqrt(8)), the ratio of rms to average value for a pure sine wave. That way, the meter will give the right rms reading for a sine wave.

If the signal is a square wave, where the average and rms values are equal, the average-responding meter will read 11% too high.

Many inverters put out a modified sine wave (MSW), which sits at zero for a while, goes to a constant positive level for a while, goes back to zero for a while, and goes to a constant negative level for a while to complete the cycle. The positive and negative parts of the signal have the same magnitude and duration.

The rms and average values of an MSW depend on its duty cycle D, the fraction of a cycle for which the signal is not at zero. In a well-designed inverter, the duty cycle will be adjusted when the DC input voltage goes up and down to maintain the nominal rms output voltage. If we use peak voltage Vp to mean the magnitude of the positive and negative voltages the signal goes to, then Vavg for an MSW is equal to Vp times D, and Vrms is equal to Vp times the square root of D.

The duty cycle for which an MSW will have the same rms to average ratio as a sine wave is 8 over pi squared, or 81%. For any duty cycle less than this, an average-responding meter will read a lower voltage than the inverter rms output, and for a duty cycle higher than this, the meter will read too high.

If your MSW inverter is putting out 120 volts rms and its duty cycle varies from 50% to 75%, the meter reading will vary from 94 volts to 115 volts. I avoid the problem by using a Radio Shack 22-174B true rms digital multimeter.

Hello,

Is this an Auto-ranging multimeter or does it have several range settings such as 2V, 20V, 200V, 750V, etc.?

If it is an auto-ranging, you will have 2 voltage selections: AC (alternating current) which will have a sine wave similar to this: ~, or DC (direct current) which will have a symbol similar to this: =. AC is mainly used to measure the voltage in your home or voltage to appliances, either 110V/120V or 220V/240V. DC is used to measure voltages such as in electronic assemblies, computers, etc.

You need to know whether you are measuring AC or DC to get an accurate reading. You also need to make sure you have the meter on a high enough range if it is not an auto-ranging meter. The best thing to do is start on a high range and work down, although most meters have an overload protection.

To measure current you must "open the circuit" and place the meter leads in the circuit. This should only be done if you are very familiar using the meter. Current is measured in Amps (A), milliamps (mA), or microamps (uA). There is little use for the common person to measure current.

Not sure what you are going to use it for. Computer power supply, perhaps?

There are some tutorials on youtube that may be beneficial. Here's one:


Here is another: http://www.youtube.com/watch?v=rivoVzxwNtI

You can do a search once there for others. Just insert "multimeter" in the Search box.

Not sure if I have answered your request sufficiently, but if you have more questions, just use the Comment button.

No, Well. not easily that I am aware of. besides the other function of the SWR meter is to measure RF power.

Plus, the Meters are Cheap. it's not worth the bother.

I have the same problem for this hpone. The phone can answer and make call but not ring, of couse the answer machine function does not work. I used Rogers home phone and now the Linksys voip adaptor. But the phone works well with landline. I think the ring votage may not enough to ring the phone. Anyone get the solution?

Jack