138 34405A User’s and Service Guide
6 Specifications
• Crest Factor:
• Maximum 5:1 at full scale
• Input Impedance:
• 1MΩ ± 2% in parallel with < 100pF of all ranges
• Input Protection:
• 750V rms on all ranges (HI terminal)
AC Current
• Measurement Method:
• DC coupled to the fuse and current shunt, AC coupled true rms measurement (measures
the AC component only)
• Shunt Resistance:
• 0.1Ω to 10Ω for 10mA to 1.2A range
• 0.01Ω for 12A range
• Input Protection:
• Externally accessible 1.25A, 500V FH fuse for I terminal
• Internal 15A, 600V fuse for 12A terminal
Frequency
• Measurement Method:
• Reciprocal counting technique. AC coupled input using AC voltage function.
• Signal Level:
• 10% of range to full scale input on all ranges
• Auto or manual range selection
• Gate Time:
• 0.1 second or 1 period of the input signal, whichever is longer.
• Input Protection:
• 750V rms on all ranges (HI terminal)
Ta ble 2 8 Supplemental Measurement Specifications
34405A users guide.book Page 138 Saturday, September 2, 2006 3:38 PM
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