2. MULTITESTER
-It is the best instrument that can measure voltage,
resistance and current. It is generally made of two
types: the analog and the digital
3. DIGITAL
MULTITESTER
A piece of test equipme
nt used for measuring v
oltage, current, resistan
ce, and possibly other
electrical quantities an
d displaying the value i
n number form.
4. ANALOG
MULTITESTER
although older than the
commonly preferred
digital multimeter, do
come with several
unique advantages.
Although both digital
and analog multimeters
measure varying units,
such as voltage, current,
and resistance, they
display their readings in
distinctly different
ways.
5. PARTS OF MULTITESTER
1. 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.
2 RANGE SELECTOR KNOB-(selector switch) makes it
possible to select different function and range of the
meter.
3. ADJUSTMENT SCREW- makes it possible to adjust the
pointer to the zero position of the scale.
6. 4. 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 .
5. TEST PROBE- Positive (red) negative (black) is use to
connect the circuit to the electrical components being
tested.
6. ZERO-OHM ADJUSTMENT KNOB- is used to zero-in
the pointer before measuring resistance.
7. PROPER CARE AND MAINTENANCE OF
THE MULTITESTER
1. Read manual of instruction on how to operate the multitester.
2. In reading the amount of voltage, always start with the highest
range to avoid reading voltage higher than the tester is set to the
tester setting.
3. Be sure that the tester is set to the correct range setting:
resistance range when measuring the ohm, voltage range when
measuring voltage and ammeter range when measuring the value
of electric current.
4. Always check the condition of its battery. Worn out batteries will
damage the internal setting of the tester.
5. When the tester is not in used or will be stored, set the selector
switch to 1000V or to OFF position.
5. Never drop the tester.
