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Measurement and instrumentation
Dual trace oscilloscope JO 20 MHz
Ref :
291166
ENGLISH
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2nd question
What do we know
about the
voltage(s) to be
measured?
4 Uses
Caution:
Do not apply signals in excess of 400 V (d.c. or a.c. peak 1 kHz).
4.1
Measurement of a signal U (t)
In order to simplify the presentation we choose to study:
•
the measurement of a d.c. signal
•
the measurement of an a.c. signal
•
the measurement of a composite signal (a.c. + d.c.)
4.1.1 Measurement of a D. C. signal
The signal to be measured is fed into either input YA (7) or YB (8).
Select the desired channel YA (15) or YB (16).
To measure the amplitude and the polarity of the signal, you must
determine the 0-Volt reference. To do this, set the lever (13) on position 0
and bring the trace on the horizontal axis.
Toggle the lever (13) on position
The signal is measured by multiplying the number of divisions that separate
the trace from the horizontal axis by the range set via the selector (9).
When performing this measurement, ensure that the gain adjust knob (10)
is rotated fully clockwise on the CAL position.
23
Frequency (e.g. 50 Hz)
Set SECONDS/DIV on 2 msec
rms value(s)
(e.g.: U = 6V a.c./sine Umax = 8.5 V)
Set YA or YA and YB VOLTS/DIV on 5
lever(s) on ~
Power up the setup
(adjust the settings as required)
Perform the measurements
.
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