True-rms Multimeters
General
Specifications
25
Table 1. Accuracy Specifications (cont.)
Function Range
Resolution
Accuracy
±
([% of Reading] + [Counts])
Model
Hz (V or A input)
[2]
99.99 Hz
999.9 Hz
9.999 kHz
50.00 kHz
99.99 kHz
0.01 Hz
0.1 Hz
0.001 kHz
0.01 kHz
0.01 kHz
0.1 % + 2
115
[1] All ac ranges except Auto-V LoZ are specified from 1 % to 100 % of range. Auto-V LoZ is specified from 0.0 V. Because inputs
below 1 % of range are not specified, it is normal for this and other true-rms meters to display
non-zero readings when the test leads are disconnected from a circuit or are shorted together. For volts, crest factor of
≤
3 at
4000 counts, decreasing linearly to 1.5 at full scale. For amps, crest factor of
≤
3. AC volts is ac-coupled.
Auto-V LoZ, AC mV, and AC amps are dc-coupled.
[2] AC Volts Hz is ac-coupled and specified from 5 Hz to 99.99 kHz. Minimum input required >50.00 kHz typically is
>1.1 vac sine. Minimum input typical and not specified. AC Amps Hz is dc-coupled and specified from 45 Hz to 5 kHz.
[3] >10 A unspecified.
