How to measure Voltages using Multitester

Steps on measuring Voltages:

1. Identify the type of Volltage we ought to measure such as Alternating Current Voltage (ACV) or Direct Current Voltages (DCV).

                  

2. Set the Range Selector knob on it’s proper position with respect to the type of Voltage and always aim the best value of range to use .

3.Touch the multimeter probes to the item you wish to measure and if it is DCV be sure on it’s polarity with respect to the testprobe and terminal of source

4. Read the  position of the needle on the scale of Voltages Scale

Be Careful on Measuring Voltages…

How to read Resistance using Multitester

Steps on Measuring Resistance

1. Choose the item whose resistance you wish to measure.

2. Check the position of your pointer if it is rest on the Zero at the left of the Scale if not adjust it using Mechanical Set Screw

3. Select the best testing range

4. Short the probes and adjust the Zero Ohm Adjustment

5.Touch the multimeter probes to the item you wish to measure.

6.Estimate the value between numbers

PARTS OF MULTITESTER

 POINTER– The needle-shape rod that moves over the scale of a meter.

– It is mechanically connected to the moving coil. It indicates the measured values on the multimeter.

RANGE SELECTOR KNOB-(selector switch) makes it possible to select different function and range of the meter.

ADJUSTMENT SCREW– makes it possible to adjust the pointer to the zero position of the scale. 

 SCALE– is a series of marking used for reading the value of quantity. Scale can have different types of scale, for voltage and current readings the scales have mostly linear which mean equal division for resistance .

TEST PROBE- Positive (red) negative (black) is use to connect the circuit to the electrical components being tested.

PROBES

 ZERO-OHM ADJUSTMENT KNOB– is used to zero-in the pointer before measuring resistance

ADJUSTMENT SCREW

RANGE SELECTOR KNOB

ZERO-OHM ADJUSTMENT KNOB

SCALE

Pointer

.

What is Multitester and its Types?

A multimeter or a multitester, also known as a VOM (Volt-Ohm meter or Volt-Ohm-milliammeter ), is an electronic measuring instrument that combines several measurement functions in one unit. A typical multimeter would include basic features such as the ability to measure voltage, current, and resistance.

                 TYPES OF MULTITESTER

Analog multimeters use a microammeter whose pointer moves over a scale calibrated for all the different measurements that can be made.

Digital multimeters (DMM, DVOM) display the measured value in numerals, and may also display a bar of a length proportional to the quantity being measured. Digital multimeters are now far more common but analog multimeters are still preferable in some cases, for example when monitoring a rapidly varying value.

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