Sanwa EM7000, Инструкция по эксплуатации, Страница: 52 / 68

DRAWING No.EM7000 09-1306 2040 2040
— 48 —
6-7 Resistance (
Ω
) Measurement
Maximum measurable resistance 100M
Ω
Measuring resistance of a part which is under voltage not only causes
a failure of this unit but also poses a danger to the human body.
WARNING
1) Objects of measurement
Resistance of resistors and circuits, and also the continuity of
parts and circuits.
2) Measuring ranges (6 ranges) : X1/X10/X100/X1 k/X10 k/X100 k
3) Measurement procedure
Insert the red plug of test
leads into the +input
terminal, and the black
plug into the –COM
terminal.
Turn the function/range
selector to the appropriate
Ω
range.
Turn on the power switch
(power ON: Lamp blinks).
Turn the electrical
zero adjuster (ZERO ADJ) to adjust the pointer to the
∞
position at the left end of blue
Ω
scales at the top.
Short-circuiting red and black test pins, turn the 0
Ω
adjuster (0
Ω
ADJ) to adjust the pointer to the 0
Ω
position at the right end of
the
Ω
scale.
Release the short circuit by the red and black test pins, and
reconnect the test pins to the object to be measured (such
as a resistor).
Read the indication on the
Ω
scale in a unit of
Ω
(ohm).
Detach the test pins from the circuit to be measured.
Turn off the power switch (power OFF: Lamp blinking goes off).
At
Ω
range, the polarity of +/– is reverse from that marked on
the body panel.
If a voltage is applied to the
Ω
function, a fuse (500 mA) built in
this unit shuts off the voltage for safety. However, the shunt
resistor in the range used may be burnt simultaneously
depending on the waveform timing of the input voltage.
∞
0
Resistor
Short-circuit
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