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Digital MultimeterUser’s manual
Digital Multimeter- DefinitionA multimeter is an electric measuring instrumentto measure parameters such as, current, volt...
Magnitudes de medida y rangosThe next table shows the most common parameters and magnitudes that a multimeter is able tome...
Caution & SafetyCaution Read the operation manual for operating the instrumentsafely and maintaining the instrument in a ...
Warnings when measuringwith a multimeter Check the instrument protection against wrong uses. Make sure the test leads ar...
Maintenance of a digitalmultimeter Change fuses when it is necessary. If you think something is wrong with themeter, cal...
Basic operations with a digitalmultimeter IThis section includes the basic operations that a multimeter canmake. Every ins...
Basic operations with a digitalmultimeter IIContinuity measurement Choose the ohm function. Press the select bottom unti...
Basic operations with a digitalmultimeter IIIDiode test Choose the diode test function. Press the select bottom until th...
Basic operations with a digitalmultimeter IVProtection systemSome digital multimeter have a protection function. A beep so...
Basic operations with a digitalmultimeterVHOLD MAX functionTo start this mode press the button hold "HOLD" MAX during seve...
Digital Multimeter: Front PanelUsually the front panel of a digital multimeterconsists of:• A display that can be simple (...
Source – More info at: Digital multimeters – DagatronInstruments For more info about our digitalmultimeters and other me...
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Multimeter user's manual

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Multimeter user's manual; this manual contains information and warnings that must be followed for operating a digital multimeter. However this is just a general procedure and every meter has different specifications and steps that need to be followed for the right measurements.

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Transcript of "Multimeter user's manual"

  1. 1. Digital MultimeterUser’s manual
  2. 2. Digital Multimeter- DefinitionA multimeter is an electric measuring instrumentto measure parameters such as, current, voltage,resistance, capacity, inductance, etc. Eachinstruments has a different range ofmeasurements and is able to measure AC, DC orboth depending of its specifications and functions.Some digital multimeters are capable ofmeasuring other parameters, for exampletemperature
  3. 3. Magnitudes de medida y rangosThe next table shows the most common parameters and magnitudes that a multimeter is able tomeasure. However, it depends on the type of instrument and its specifications. There are severalthings than make a multimeter better than another, usually the wide of ranges and the accuracyin the measurements are a vital issue and they depends on how good the tool is; usually preprice is directly related; a better multimeter takes measurements more accurately or in a widerange, but this is not always true.Parameters Common ranges ofmeasurementAC Current Up to 10A or 20ADC Current Up to 10A or 20AAC Voltage Up to 750VDC Voltage Up to 1000VInductance Up to 20HCapacity Up to 9.999uFResistance Up to 50MohmFrequency Up to 10MhzContinuity Acoustic beepDiodes Yes/ NoTemperature Up to 1000ºC (with probe)
  4. 4. Caution & SafetyCaution Read the operation manual for operating the instrumentsafely and maintaining the instrument in a safe operatingcondition. If the meter comes from a trusted supplier, the instrumentshas been tested, verified and the warranty will be included.Safety Multimeters fro professional use must meet someinternational safety standards which will determine the rightuse of the meter. For example the digital multimeter Brymen BM 319 meetsthe standards CE/CAT. II for 1000V.
  5. 5. Warnings when measuringwith a multimeter Check the instrument protection against wrong uses. Make sure the test leads are in good conditions. Never overpass the limits specified for each type ofmeasurement. Do not touch the metallic part of the test leads duringthe measuring. If doubt, better to star choosing the highest range for theparameter to measure. Every time you want to change function, make sure theprobes are not in contact with any type of current orvoltage. Pay special attention when measuring high voltagecircuits. Never measure resistance in active circuits.These advises are general and they depend on the type ofmeter.These can be followed to operate multimeters such asthe Brymen BM525
  6. 6. Maintenance of a digitalmultimeter Change fuses when it is necessary. If you think something is wrong with themeter, call the technical service. Make sure the cover is close and screws arefasten. Periodically wipe the case with a damp clothand mild detergent; do not use abrasives orsolvents. If the meter is not to be used for severalmonths, remove the batteries and storethem separately.
  7. 7. Basic operations with a digitalmultimeter IThis section includes the basic operations that a multimeter canmake. Every instruments requires a different operation procedure,these are general procedures that work for some meters, forexample the Brymen BM 525.DC Voltage measurement Chose de DC function en the slide-switch function-selector. Plug the test leads, the black one goes in the COM jack and the redone in theV jack.Resistance measurement Chose de range of the function:  ohms. Plug the test leads, the black one goes in the COM jack and the redone in the OHM/V jack.*Measuring voltage with this function may cause damage to the instrument.
  8. 8. Basic operations with a digitalmultimeter IIContinuity measurement Choose the ohm function. Press the select bottom until the continuity symbol shows up on thescreen. Plug the test leads, the black one goes in the COM jack and the red one inthe OHM/V jack. Take the test lead and make contact with the circuit. Usually and acoustic sound will verify that there is continuityCapacity measurement Choose the continuity function. Press the select bottom until the capacity symbol shows up on the display. Place the test lead, the black one goes in the COM jack and the red one intheV jack. Place the test lead on the circuit and watch theresults on the display.
  9. 9. Basic operations with a digitalmultimeter IIIDiode test Choose the diode test function. Press the select bottom until the diode symbol shows up on the screen. Place the test lead, the black one goes in the COM jack and the red one in theV jack. Take the test lead and make contact with the circuit. Do it again switching the test leads. The display will show “OL” if the diode is good.Any other measurement willmean the diode is resistive or cut (faulty).DC/AC measurement: uA, mA or Amps Choose the A, mA or uA function. Place the test lead, the black one goes in the COM jack and the red one in themA, uA or A jack. When the function is on, the instruments is setto measure DC (by default). Press the selectbottom to change to AC measurements.
  10. 10. Basic operations with a digitalmultimeter IVProtection systemSome digital multimeter have a protection function. A beep sound whenthe positions of the test leads is not according with the measurementfunction you have chosen.Temperature measurements Choose the temperature function. Connect the temperature probe, the right jacks are COM (-) andTEMP(+). If the meter is ready to measure the display will show the symbol: ºC.HOLD functionPress the hold bottom to start this function, press again to exit.Thereading will be frozen on the display when the function is on.
  11. 11. Basic operations with a digitalmultimeterVHOLD MAX functionTo start this mode press the button hold "HOLD" MAX during severalseconds.Auto Range or Manual functionPress the RANGE button to choose manual range. Press the button againto switch to Auto-range.When auto-rage is on the symbol:Auto will be onthe displayDisplay with back lightPress the select button during several seconds to start the back light onthe display. Do it again to turn it off.Auto-power-off functionThe meter turns off after X minutes of neitherswitch nor button activity. Press any button andthe meter will turn back on.
  12. 12. Digital Multimeter: Front PanelUsually the front panel of a digital multimeterconsists of:• A display that can be simple (image on the left)or dual (image on the right)• A switch to choose themeasuring parameter.• Function buttons. For example, toturn the light on the display on.• Jacks to plug the test leads anddifferent types of probes.
  13. 13. Source – More info at: Digital multimeters – DagatronInstruments For more info about our digitalmultimeters and other measuringinstruments send and email toinfo@dagatron.es
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