72
M2 Data Acquisition Device
Digital Multimeter Operations
Min/Max Key
Press the Min/Max key and the display shows both the instantaneous voltage reading and the
minimum and maximum voltages that occurred since the last time the key was pressed. See
"Sample active menu select mode screen‚" on page 71
.
The displayed values continue to update until the Min/Max key is pressed again, then:
•
A short press of the Min/Max key resets the readings
•
A long press of the Min/Max key returns to normal Volts DC mode.
S Key, Special Functions
The S key is used to activate special time measurement functions available when sampling
voltage. Each press of the S key advances to the next function in the following order:
1.
The screen changes to show the frequency, period, and duty cycle of the test signal.
2.
The screen changes to show the frequency, period, and pulse width of the test signal.
When displaying frequency, the period (abbreviated PRD on the screen) represents the
percentage of the duty cycle, or the “on time” of the signal. Readings are displayed in milliseconds.
The Freeze (F2) and Range (F3) soft keys remain active in this mode.
shows a typical
frequency display following a single press of the S Key. Press the S Key a second time and the
duty cycle (DTY) reading changes to show the pulse-width (PWD) of the signal in milliseconds.
Figure 8-5 Sample Frequency display
NOTE:
i
Press and hold the S key at any time to instantly return the display to a voltage reading.
In this special time measurement mode, the readings shown on the screen are integrated, or
filtered. This means that the displayed values show average time-based measurements with great
accuracy, but do not capture fast signal anomalies such as instantaneous “glitches” or timing
shifts. However, these types of fast signal changes can be seen using the Graph key.
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Summary of Contents for VERDICT D7
Page 1: ...User Manual May 2011 EAZ0063L05C Rev B ...
Page 3: ...iii ...