Tenma 72-7930, Руководство по эксплуатации

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Measurement Operation(4)
The resistance ranges are:200
Ω
, 2k
Ω
, 20k
Ω
, 2M
Ω
and 20M
Ω
.
1. Insert the red test lead into the Hz V
Ω
terminal
and the black test lead into the COM terminal.
2. Set the rotary switch to an appropriate measurement
position in
Ω
range.
3. Connect the test leads across with the object being
measured.
The measured value shows on the display.
black red
(figure 6)
Note
l
The test leads can add 0.1to 0.2
Ω
of error to the
resistance measurement. To obtain accurate readings
in low-resistance, short-circuit the input terminals
beforehand and record the reading obtained (called
this reading as X). (X) is the additional resistance from
the test lead. Then use the equation:
measured resistance value (Y) – (X) = accurate readings
of resistance.
l
If the input terminal short-circuit reading 0.5,check
the test leads for any looseness or other cause.
l
For high resistance (>1M
Ω
), it may require several
seconds to obtain a stable reading; select short test
leads for stable and precise readings.
l
When the resistance is higher than the maximum range
or in open circuit condition, the Meter displays “1”.
l
When resistance measurement has been completed,
disconnect the connection between the testing leads
and the circuit under test.
Model 72-7930: OPERATING MANUAL
18