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Model 88 V
Users Manual
30
Measuring Pulse Width
For a periodic waveform (its pattern repeats at equal time
intervals), you can determine the amount of time that the
signal is high or low as follows:
1. Measure the signal's frequency by pressing G
once.
2. Press
G two more times to measure pulse width
in milliseconds (ms)
3. Press E to toggle between the signal’s positive
or negative pulse.
Bar Graph
The analog bar graph functions like the needle on an
analog meter, but without the overshoot. The bar graph
updates 40 times per second. Because the graph
responds 10 times faster than the digital display, it is
useful for observing momentary changes, for making
peak and null adjustments and for observing rapidly
changing inputs. The graph is not shown for capacitance,
frequency counter functions, temperature, or peak min
max.
The number of lit segments indicates the measured value
and is relative to the full-scale value of the selected
range.
In the 60 V range, for example, the major divisions on the
scale represent 0, 15, 30, 45, and 60 V. An input of -30 V
lights the negative sign and the segments up to the
middle of the scale.
The bar graph also has a zoom function, as described
under "Zoom Mode".
Zoom Mode (Power Up Option Only)
To use the Rel Zoom Bar Graph:
1. Hold down F while turning the Meter on. The
display reads “2rEL”.
2. Select the relative mode by pressing F again.
3. The center of the bar graph now represents zero and
the sensitivity of the bar graph increases by a factor
of 10. Measured values more negative than the
stored reference activate segments to the left of
center; values more positive activate segments to the
right of center.
Uses for the Zoom Mode
The relative mode, combined with the increased
sensitivity of the bar graph's zoom mode, helps you make
fast and accurate zero and peak adjustments.
1.888.610.7664 sales@GlobalTestSupply.com
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