step by step on how to use a digital multimeter.?
372456
To measure ohms, DCV, ACV, Amps or what????
1169017
A voltmeter and an ammeter will provide the input power. You will need some form of dynamometer to measure output power.\n\nOutput power divided by input power yields efficiency.
1146491
Look for caliper (spelling counts).  Specifically, Vernier Caliper, and micrometer.  \n\nThose are the two major precision measuring tools.  Try the starrett.com web site.  They have a sterling reputation for quality.
964185
I sense that you have no clue what you're doing. Tell me I'm wrong.\n\nFor DC circuits, Ohm's law says: V = I * R, voltage equals current times resistance.\n\nYour circuit will consist of a battery (voltage source) and a load (resistance) plus the wires to connect them and the meter(s).\n\nIdeally you will test one battery at a time. That way the load will be identical (including the small resistance of the wires).\n\nBatteries typically have two ratings: voltage and capacity.\nVoltage is measured in volts and this decreases as the battery discharges. Capacity is measured in amp hours (current multiplied by time) which specifies how long the battery can deliver a current.\n\nAssuming the circuit resistance is constant (reasonable assumption for your purposes), when you connect the battery to the load, the voltage (independent variable) will cause a current (dependent variable) to flow. As the battery discharges, the voltage will decrease, and the current will correspondingly decrease. You will need a watch or timer as well. Time zero will be when you first connect the battery. Measure the battery voltage at that instant and at intervals. Depending on the load and how fast the battery discharges should determine how frequently you take measurements.\n\nmsg me when you have the data if you need help analyzing it.
96567
got a dandy.....even though  it  seems  difficult   youll  break through  and  find  out  you can  almost  measure  anything....try  this  because  i dont  know  what  type  of  equipment  you have....in  search  bar  go.....vernier  read .. hit search..the  NTNU site java  is  excellentyou you can  even  practice  measuring  on  line.....reading  a  vernier  is  good too.....check  them  all
317272
Try this book, it's invaluable.\n\nCooling Techniques for Electronic Equipment\nISBN 0-471-52451-4
827069
The meter should have some literature with it.\n\nWrite to the manufacturer and ask for it.
313810
It may depend on the frequency or sampling rate that you want to achieve.  One possibility is to use an oscilloscope on a current sensing shunt or current sensing toroid.  This will give you a visual representation.\n\nIf you are looking for a peak current, you can use a digital multimeter with a peak hold feature, but keep in mind that you will be limited to the maximum response time of that meter.
118710
The meter must measure the power you use (and must pay for) using the formula P = IE (power equals current (I) times voltage (E)).  To do so it must accurately dedect the line voltage and electrical current entering your house.  The meter contains an aluminum disk that you can see spinning fast or slow depending upon how many (or few) electrical devices you have turned on.  Inside the meter there are two coils of wire (one on top and one on the bottom of the disk).  One coil senses instaneous voltage that can vary (and even droop in a brownout).  The other coil detects all the current you are using, if any.  With your main circuit breaker open there will be none.  When there is both voltage and current flowing, magnetic eddies are produced that measure and integrate the power being used by spinning the aluminum disk (like a small motor) which is connected to a set of gears that turn the meter numerals.  See the link for an illustration and detailed explanation.  Good luck.
336716
Try this tutorial below...
980282
Make sure you have a good, solid connection between your sample and your ohmmeter probes.  Use a scale on your meter that's appropriate for the resistance you are measuring.  If your resistance is 1/2 ohm, then it will read zero on a 0-20Kohm scale, which isn't useful.  It will read half-way on a 0-1ohm scale, where you can get a good reading.\n\nThe resistance of a sample depends not just on the material and temperature, but also the geometry.  The resistance of a uniform wire will be proportional to its length and inversely proportional to its cross-section area.
602903
You don't, any more than you convert between volts and watts.  You can read about dBm in the article below, but simply put, it is a measure of power.
861788
There is no accurate way to do this because too many variables are involved. You can do like I do though and run a series of tests and then average them.\n\nhttp://www.toast.net/
199541
You will need to get a DMM (digital multi meter)...Walmart has these pretty cheap.  \n\n1) Before doing anything else, check the fuses again.\n\n2) Unlug your fan from the harness it is comming from.  Put the DMM on continuity (ohms) or if it has the tone option, put it there.  Now put the 2 leads together (probe to probe). Take note of what the display says.  Now put one probe on one wire comming from the plug on the fan, and do the same with the other probe on the other pin. Your display should read the same (continuity) or beep.  If it does, your fan is good.\n\n3) Now put that DMM on DC voltage (12 volt range up to 25, depending on DMM).  Again, one lead on one wire, other lead to the other wire.  Start your car, and turn on your a/c (this activates the fan circuit regardless of temperature).  If you get power, you know your relay is fine.  Now turn off your a/c and let the engine heat up to normal.  If your power does not come back, you have a temperature switch gone bad.  If it does, you have a problem with the fan (which you should have found in the last step).\n\nHope this helps!
155130
Chuck Easttom has a good tutorial on his website. Somehow, I have it all in one Word document. But you can get it Chapter by chapter on his site:\n\nhttp://www.chuckeasttom.com/vb/index.htm
468151
to convert an analog to digital.. you have to quantify the signal next you have to sampling.\n\nmeans that you have to divide the amplitudes to discret values. and the frequencies to discret.\n\nat the end you can encode the signal and compress it.\n\nyou run in the oposite way to convert an analog to digital signal.\n\nhope this can help
1016840
Use a 7106 or 7107 IC.  They provide analog to digital conversion and drivers for a liquid crystal display.  The source in "references" provides kits to make a panel mounted ohm or volt meter using these ICs.  \n\n"Google" these ICs and you will find more.