EZ Digital OS-5060A, Operation Manual

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Instantaneous Voltages. To measure instantaneous voltage, proceed as follows.
1. Set up the scope for the vertical mode desired per the instructions in 2-3 BASIC
OPERATING PROCEDURES.
2. Adjust the TIME/DIV switch (22) or (23) for one complete cycle of waveform and
set the VOLTS/DIV switch for a trace amplitude of 4 to 6 divisions(see FIGURE 2-7)
3. Flip the AC/GND/DC switch (11) or (12) to GND.
4. Use the appropriate Vertical POSITION control (17) or (18) to set the baseline on the
central horizontal graticule line. However, if you know the signal voltage is wholly
positive, use the bottommost graticule line. If you know the signal voltage is wholly
negative, use the uppermost graticule line.
NOTE : The Vertical POSITION controls must not be
Touched again until the measurement is completed.
5. Flip the AC/GND/DC switch to DC. The polarity of all points above the ground-
reference line is positive ; all points below the ground-reference line are negative.
CAUTION : Make certain the waveform is not riding
on a high-amplitude DC voltage before flipping the
AC/GND/DC switch.
6. Use the Horizontal POSITION control (26) to position any point of interest on the
central vertical graticule line. This line has additional calibration marks equal to 0.2
major division each. The voltage relative to ground at any point selected is equal to
the number of division form that point to the ground-reference line multiplied by the
VOLTS/DIV setting. In the example used for Figure 2-7 the voltage for a 0.5V/div
scale is 2.5V (5.0 div X 0.5V).
7. If X5 vertical magnification is used, divide the step 6 voltage by 5. However, if 10X
attenuator probes are used, multiply the voltage by 10.
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