Specifications and Characteristics 6
U3402A User’s and Service Guide 99
DC current
• Shunt resistance
• 0.1 W to 10 W for 12 mA to 1.2 A ranges
• 0.01 W for 12 A range
• Maximum input and overload protection
• mA input terminal: 1200 mADC or AC RMS. Protected with 1.25 A/500 V, IEC-127 sheet, FB
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 FB fuse
• Response time
• Approximately 1.0 seconds when the displayed reading reaches 99.9% DC value of the tested
input signal at the same range
AC voltage (True RMS AC Coupling Mode)
• Measurement method
• AC coupled true RMS—measure the AC component with up to 400 VDC bias on any range
• Crest factor
• Maximum 3:0 at full scale
• Input impedance
• 1 MW ± 2% in parallel with <120 pF on all ranges
• Maximum input voltage
• 750 V RMS /1100 V PEAK
• 2x10
7
V-Hz product on any range, normal mode input
• 1x10
6
V-Hz product on any range, common mode input
• Overload ranging
• Will select higher range if peak input overload is detected during autorange. Overload is
reported in manual ranging
• Input protection
• 750 V RMS on all ranges
Table 6 - 9 Supplemental measurement specifications (continued)
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