1587 FC/1587/1577
Users Manual
36
1577 Accuracy
Range Resolution
50 Hz to 60 Hz
±
(% of Rdg + Counts)
600.0 mV
0.1 mV
±
(2 % + 3)
6.000 V
0.001 V
±
(2 % + 3)
60.00 V
0.01 V
±
(2 % + 3)
600.0 V
0.1 V
±
(2 % + 3)
1000 V
1 V
±
(2 % + 3)
AC Conversion ................................................... Inputs are ac-coupled and calibrated to the rms value of sine wave
input. Conversions are true-rms responding and specified from 5 % to
100 % of range. Input signal crest factor can be up to 3 at up to 500 V,
decreasing linearly to crest factor
≤
1.5 at 1000 V. For non-sinusoidal
waveforms add
±
(2 % r 2 % FS) typical, for a crest factor up
to 3.
Input Impedance ................................................. 10 M
Ω
(nominal), <100 pF, ac-coupled
Common Mode Rejection Ratio
(1 k
Ω
unbalanced) .............................................. >60 dB at dc, 50 or 60 Hz
DC Voltage Measurement
Range Resolution
Accuracy 1587 and 1587T
[1]
±
(% of Rdg + Counts)
Accuracy 1577
[1]
±
(% of Rdg + Counts)
6.000 V dc
0.001 V
±
(0.09 % + 2)
±
(0.2 % + 2)
60.00 V dc
0.01 V
±
(0.09 % + 2)
±
(0.2 % + 2)
600.0 V dc
0.1 V
±
(0.09 % + 2)
±
(0.2 % + 2)
1000 V dc
1 V
±
(0.09 % + 2)
±
(0.2 % + 2)
[1]
Accuracies apply to
±
100% of range.
Input Impedance ................................................. 10 M
Ω
(nominal), <100 pF
Normal Mode Rejection Ratio ............................. >60 dB @ 50 Hz or 60 Hz
Common Mode Rejection Ratio .......................... >120 dB @ dc, 50 Hz or 60 Hz (1 k
Ω
unbalance)