Specifications and Characteristics 6
U3402A User’s and Service Guide 101
AC current (True RMS, AC Coupling Mode)
• Measurement method
• DC coupled to the fuse and current shunt, AC coupled true RMS measurement (measures the
AC component only)
• Crest factor
• Maximum 3:0 at full scale
• Shunt resistance
• 0.1 W to 10 W for 10 mA to 1.2 A ranges
• 0.01 W for 12 A range
• Input protection
• mA input terminal: 1200 mADC or AC RMS. Protected with 1.25 A/500 V, IEC-127 sheet, FH
fuse
• 12 A input terminal: 10 ADC or AC RMS continuous, or 12 ADC or AC RMS for 30 seconds
maximum. Protected with 15 A/600 V, breaking capacity 10,000 A FH fuse.
• Response time
• Approximately 1.5 seconds when the displayed reading reaches 99.9% AC RMS value of the
tested input signal at the same range
AC current (True RMS, AC Coupling Mode)
• Measurement method
• AC+DC coupled to the fuse and current shunt, AC+DC coupled true RMS measurement
(measures the AC component only)
• Crest factor
• Maximum 3:0 at full scale
• Measurement range
• VDC and VAC are automatically set at the same range.
• Response time
• Approximately 1.5 seconds when the displayed reading reaches 99.9% AC RMS value of the
tested input signal at the same range
Table 6 - 9 Supplemental measurement specifications (continued)
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