7451A/7461A/7461P Digital Multimeter Operation Manual
7.1.2 AC Voltage Measurement (ACV, ACV(AC+DC))
7-3
Maximum allowable applied voltage
Noise rejection ratio
7.1.2
AC Voltage Measurement (ACV, ACV(AC+DC))
•
7461A/61P
Measurement method
True RMS measurement, RMS display
Input range
5% or more of a full scale
Crest factor
5:1 at a full scale
Temperature coefficient (1/10 of measurement accuracy that includes the additional error)/
C in each
range and frequency range
ACV
Between V and COM
1000 Vpeak
Between BchHi and BchLo
200 Vpeak
Between BchHi, BchLo and COM
200 Vpeak
Between COM and the chassis
500 V
Integration time
Effective CMRR *4
NMRR
DC
50/60 Hz
0.08%
50/60 Hz
0.08%
Integral multiple of 1 PLC
130 dB
120 dB
60 dB
Others
130 dB
60 dB
0 dB
*4
Unbalanced impedance of 1 k
Input
terminal
Range
Maximum
display
Resolution
Input
impedance
Measurement accuracy *1
(% of r digits) 23
C
5
C
20 Hz -
45 Hz
45 Hz -
100 Hz
100 Hz -
20 kHz
20 kHz -
50 kHz
50 kHz -
100 kHz
100 kHz -
300 kHz *2
V-COM
100 mV
119.9999
100 nV
1 M
2%,
140 pF or less
0.28+600
0.1+600
0.06+600 0.12+1800 0.6+2100
5+6000
1000 mV 1199.999
1
V
1 M
2%,
140 pF or less
0.28+500
0.1+500
0.06+500
0.12+500
0.6+800
4+5000
10 V
11.99999
10
V
1 M
2%,
140 pF or less
0.28+400
0.1+400
0.06+400
0.12+500
0.6+800
4+5000
100 V
119.9999
100
V
1 M
2%,
140 pF or less
0.28+400
0.1+400
0.06+400
0.12+500
0.6+800
4+5000
700 V
749.999
1 mV
1 M
2%,
140 pF or less
0.28+280
0.1+280
0.06+280
0.12+350
0.6+580
4+3500
*1
AC filter: SLOW, Integration time: 10 PLC, Display digit: 6 1/2, Sinusoidal input voltage
The input voltage is restricted to 2.2
10
7
V•Hz in the 100 V and 700 V ranges.
If the input voltage is 10% or less of the full scale, 30
V is added to the measurement accuracy as the additional error.
*2
100 kHz-200 kHz in the 100 mV and 1000 mV ranges
