True RMS Multimeters
Using the Bar Graph
Measuring Frequency | W |
Warning
To avoid electrical shock, disregard the bar graph for frequencies > 500 Hz. If the frequency of the measured signal is > 500 Hz, the bar graph is unspecified.
The Meter measures the frequency of a signal by counting the number of times the signal crosses a trigger level each second. The trigger level is 0 V, 0 A for all ranges.
AC/DC Voltage Frequency | AC/DC Current Frequency |
Hz | Hz |
Hz V | AHz |
| |
Hz V |
|
| AHz |
Using the Bar Graph
The bar graph is like the needle on an analog meter. It has an overload indicator (>) to the right and a polarity indicator (±) to the left.
Because the bar graph updates about 40 times per second, which is ten times faster than the digital display, the bar graph is useful for making peak and null adjustments.
The bar graph is disabled when measuring capacitance. In frequency, the bar graph and range annunciator indicate the underlying voltage or current.
The number of segments indicates the measured value and is relative to the
In the 60 V range, for example (see below), the major divisions on the scale represent 0, 30, and 60 V. An input of −30 V turns on the negative sign and the segments up to the middle of the scale.
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⇒Press Hz to turn the frequency measurement function on and off.
⇒In frequency, the bar graph and range annunciator indicate the AC or DC voltage or current present.
⇒Select progressively lower ranges using manual ranging for a stable reading.
Cleaning
Wipe the case with a damp cloth and mild detergent. Do not use abrasives or solvents. Dirt or moisture in the terminals can affect readings.
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