True RMS Digital Multimeters
Specifications
35
Table 7. AC Voltage Characteristics
Characteristic Description
Input impedance 10 MΩ in parallel with 100 pF (typical)
Settling time 4 readings (typical)
Reading rate 5,000 ct.: 4 readings per second
50,000 ct.: 1 reading per second
Common mode rejection ratio 60 dB at DC to 60 Hz
Crest factor, maximum Full scale: 3
Half scale: 6
AC+DC
1
total RMS volts accuracy AC (RMS) accuracy + 0.1% + 1 count
AC DC
1
dual display accuracy DC Accuracy + 0.05% + 1 count
AC RMS Accuracy + 0.1% + 1 count
Upper display frequency (5,000 counts)
Accuracy ± (0.002% + 1 count) for 20 Hz to 20 kHz
Sensitivity 10% of selected voltage range
dB reference
2
1
VRMS (adjustable)
dBm reference
2
775 mV across 600 Ω (1 mW)
1
5,000-count mode only.
2
See "dB and dBm Voltage Measurements" for dB and dBm calculations.
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