Ac Measurement And Operating Characteristics - Agilent Technologies 34972A User Manual

AC Measurement and Operating Characteristics

AC Measurement Characteristics
True RMS AC Voltage
Measurement Method: AC-coupled True RMS -measures
the AC component of input with up to
300 VDC of bias on any range
Crest Factor: Maximum 5:1 at Full Scale
Additional Crest Factor
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Errors (non-sinewave): Crest Factor 1-2: 0.05% of reading
Crest Factor 2-3: 0.15% of reading
Crest Factor 3-4: 0.30% of reading
Crest Factor 4-5: 0.40% of reading
AC Filter Bandwidth:
Slow 3 Hz - 300 kHz
Medium 20 Hz - 300 kHz
Fast 200 Hz - 300 kHz
Input Impedance: 1 M ±2%, in parallel with 150 pF
Input Protection: 300 Vrms on all ranges
Frequency and Period
Measurement Method: Reciprocal counting technique
Voltage Ranges: Same as AC Voltage function
Gate Time: 1s, 100 ms, or 10 ms
Measurement Timeout: Selectable 3 Hz, 20 Hz, 200 Hz LF
limit
True RMS AC Current
Measurement Method: Direct coupled to the fuse and shunt.
AC-coupled True RMS
measurement (measures the AC
component only)
Shunt Resistance: 5 for 10 mA; 0.1 for 100 mA, 1A
Input Protection: 1.5A 250 V fuse on 34901A module
Measurement Noise Rejection
AC CMRR: 70 dB
Measurement Considerations (Frequency and Period)
All frequency counters are susceptible to error when measuring low-
voltage, low-frequency signals, Shielding inputs from external noise
pickup is critical for minimizing measurement errors.
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AC Measurement and Operating Characteristics

Chapter 8 Specifications
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