5. Operation instructions
Be extremely careful when working in high voltage circuits. Even
though meter and test leads are well insulated, it is not advisable
to handle the instrument or leads while power is on in the circuit
being measured.
Note:
1. If the value of the voltage or current to be measured is
unknown, always start with the highest range to avoid
overloading the tester. The range selector switch should not
be rotated while under load.
2. The life and reliability of the tester will be greatly increased if
test leads are removed from the circuit before changing
ranges.
3. Before making any measurements, check to see that the
pointer indicates zero. If the pointer is off zero, make the
required correction by turning the screw of the mechanical
zero ADJ.
5.1. Measuring DC Voltages
1. Connect the black test lead into the COM-jack and the red
test lead into the V jack.
2. Set the range switch for any of the DC volts range positions
desired. When in doubt as to which range to use, always
start with the highest voltage range as a protection to the
instrument.
3. Connect the black test lead to the negative side of the circuit
to be measured and the red test lead to the positive side of
the circuit.
4. Turn the power on in the circuit to be tested. If the pointer
deflects to the left of zero, the actual circuit polarity is the
reverse of that anticipated.
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