LIMIT DCM 4 Manual Del Operador página 9

OPERATIONS
In addition, pay special attention to the warning sign beside the test lead jack,
voltage or current tested must not
The meter automatically turns off if there is no operation for 15 minutes. The meter can be activated by
pressing any key (except FLIGHT button). To disable auto shutdown, long press SELECT key in off state
and turn on the meter.
1. Related measurement of AC current (Picture 4)
1.1 AC Current measurement
1) Turn the function dial to A~ position.
2) Press the trigger to open clamp jaws and fully enclose one conductor (only one conductor can be
measured at a time). For optimum results, centre the conductor in the jaws.
1.2 Current frequency measurement
1) When the function dial is in the AC current position, short press the Hz/INRUSH button to enter the
frequency measurement mode.
2) Short press the Hz/INRUSH button again to exit the frequency measurement mode.
1.3 Inrush current measurement (for AC current)
1) The option is available to select proper range using RANGE button first, or simply long pressing the
Hz/INRUSH button to enter the inrush current measurement mode.
2) Start the device being tested and measure the instantaneous inrush current of the device.
3) Long press the Hz/INRUSH button again to exit the inrush current measurement mode.
Inrush current is the highest AC current (true RMS) within 100 ms of start time, as shown below.
Measured inrush
current
Current
detection
threshold
100 ms sample window (60 Hz)
Start
Note:
• Current should be measured within 0°C~40°C. Do not release the trigger suddenly, as the impact
may briefly change the reading.
• To ensure measurement accuracy, centre the conductor within the jaws. Otherwise, there may be a
±1.0% additional error in reading.
• When testing high current, the clamp will vibrate slightly, which is a normal phenomenon.
exceed the values listed on the meter.
Stop
indicating that the
TIME
GB
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