Amprobe ACD-330T Clamp-On-Multimeter - Manual (Page 6)

A UNIQUE CLAMP-ON MULTIMETER
INTRODUCTION
Measuring current accurately is a difficult job in today's industrial plants and commercial
buildings. An increasing number of personal computers, adjustable speed motor drives,
and other types electronic equipment come on-line every day. These, devices draw cur-
rent in short pulses, and are referred to as non-linear loads.
Non-linear loads draw high peak -currents, causing harmonies in the load current. This
may result in unexplained circuit breaker tripping, or dangerous overheating of neutral
conductors and transformers. Currents containing harmonics, can only be accurately
measured with a true-rms meter or Clamp meter.
This CLAMP-ON MULTIMETER is shown in Figure 1. This meter his many functions
which, are shown below:
• TRUE RMS measurement fornon-linearand traditional loads.
• 1 ms Peak Hold feature to capture glitch orin-rush current.
• Dual Display Mode: Current vs Frequency or Voltage vs Frequency.
• Diode measurement.
• Dynamic Recording helps to record the variation of tests.
• Hand Guard forprevention of accidental contact with conductors.
• Carrying case with shoulderstrap.
• Data Hold to freeze displayed digital value.
• Relative (zero) function.
• Auto and Manual Ranging.
• Backlit display foreasy reading in dark places.
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