Digital Multimeter
Page <17>
20/09/10 V1.1
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Measurement Operation (8)
••
To obtain a stable reading when measuring input scope
>
30V rms frequency signal:
Set the rotary switch to
Then press
Hz%
to select Hz measurement mode to obtain frequency value.
When input scope
≤≤
30V rms, please follow the above step 2. carrying out the measurement.
••
When making frequency measurement at voltage or current range, please mind the following signal requirement table
:
Range
Signal Requirement
Frequency Range
≥
1.0V
5Hz to 10kHz
≥
5.0
5Hz to 20kHz
≥
45V
45Hz to 4kHz
≥
420
45Hz to 1.6kHz
≥
45mA
5Hz to 5kHz
≥
4A
45Hz to 1kHz
H. Measuring Duty Cycle (See figure 9)
The duty cycle measurement range is: 0.1% to 99.9%. To measure duty cycle, do the following:
1. Set up the Meter to measure frequency.
2. To select duty cycle, press
until the % symbol is shown on the display.
3. Connect the test leads across with the object being measured. The measured value shows on the display.
Note
The LCD displays 000.0% indicating the input signal is high or low level.
When duty cycle measurement has been completed, disconnect the connection between the testing leads and the circuit under test,
and remove the testing leads away from the input terminals of the Meter.
To obtain a stable reading when measuring input scope >30V rms frequency singal:
Set the rotary switch to
Then press
Hz%
to select % measurement mode to obtain duty cycle value.
When input scope
≤≤
30V rms, please follow the above step 2. carrying out the measurement.
4V
40V
400V
1000V/750V
mA
A
