Promax PD-183, Инструкция по эксплуатации

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USER’S MANUAL PD-183
Page 16 07/2015
7. Never apply a voltage between the COM terminal and current
terminals.
8. When switching between current ranges to obtain greater
accuracy and better resolution, completely de-energize the circuit to
be measured before changing the range.
4.6 Resistance measurements
CAUTION
Turn off power on the test circuit and discharge all
capacitors before attempting in-circuit resistance
measurements. If an external voltage is present across a
component, it will be impossible to take an accurate
measurement of the resistance of that component.
1. Insert the BLACK and RED test leads into the COM and V
Ω
input
terminals respectively.
2. Set the rotary selector switch to the (
Ω
) position. If appears in
display the overange indicator when making a measurement, you
must choose a higher range.
3. Connect the BLACK and RED test probe tips to the circuit or
device under test, making sure it is de-energized first.
4. The resistance in the test leads can diminish the accuracy in the
lowest range (200
Ω
). The error is generally from 0.1 to 0.2
Ω
for a
standard pair of test leads. Always choose the smallest range
possible. Shortcut the terminals and observe the reading and
subtract it when making a measurement.