ACD-330T Amprobe, ACD-330T Datasheet - Page 38

• Manufacturer Part Number: ACD-330T
• Description: DMM CLAMP-ON W/BACKLIGHT
• Manufacturer: Amprobe
• Type: Digital (DMM)r

Specifications of ACD-330T

• Includes: Battery, Case, Test Leads
• Style: Clamp
• Display Digits: 4
• Display Type: LCD, Bar Graph
• Function: Voltage, Current, Resistance, Frequency
• Functions, Extra: Continuity, Diode Test
• Features: Auto Off, Backlight, Hold, Min/Max/Ave
• Ranging: Auto/Manual
• Response: True RMS
• Lead Free Status / RoHS Status: Contains lead / RoHS compliant by exemption
• Display Count: -
• Other names: 2730749

2. The distribution transformer must have additional cooling to continue operation
wire is circulating in the deltaconnected primary winding. This circulating har-
3. Phase current harmonics are reflected to the primary winding and they continue
back towards the power source. This can cause distortion of the voltage wave so
formers and power factor correction capacitors. An additional feature allows the
allows the ability to determine crest factor:
The meter measures the TRUE RMS value of AC voltages and currents. In physi-
value is the DC equivalent of the original waveform, it provides a reliable basis for
comparing dissimilar waveforms.
By contrast, many meters use average-responding AC converters rather than TRUE
RMS converters. The scale factor in these meters are adjusted so that they display
the RMS value for a harmonic-free sine wave. If a signal is not sinusoidal, average-
responding meters do not display correct RMS readings.
1. The AC neutral wires must be of sufficient gauge to allow for harmonic current.
at its rated capacity. This is because the harmonic current in the secondary neutral
monic current heats up the transformer.
that any power factor correction capacitors on the line can be easily overloaded.
We can use this Meter to analyze components such as power distribution trans-
measurement of half-cycle peak current by using the 1 ms peak hold feature. This
NOTE: If Crest Factor exceeds 1.1, harmonic distortion is present
cal terms, the RMS (Root-Mean-Square) value of a waveform is the equivalent DC
value that causes the same amount of heat to be dissipated in a resistor. TRUE RMS
measurement greatly simplifies the analysis of complex AC signals. Since the RMS
TRUE RMS MEASUREMENT
Crest factor = Peak value/True rms value
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