ADCMT 7461A - Page 175

7451A/7461A/7461P Digital Multimeter Operation Manual
7.1.5 AC Current Measurement (ACI, ACI(AC+DC))
7-13
• 7451A
Measurement method True RMS measurement, RMS display
Input range 5% or more of full scale
Crest factor 3:1 at a full scale (Except for the 3 A range)
Temperature coefficient (1/10 of measurement accuracy that includes the additional error)/C in each
range and frequency range
ACI
ACI(AC+DC)
Additional error depending on the crest factor (For a non-sinusoidal input current)
Input
terminal
Range
Maximum
display
Resolution
Resistance
between
input
terminals
Measurement accuracy *1
(% of reading + digits) 23C5C
20 Hz -
45 Hz
45 Hz -
100 Hz
100 Hz -
5 kHz
mA-COM 3000 A 3199.99 10 nA 10.5  0.45+200 0.25+200 0.2+200
30 mA 31.9999 100 nA 10.5  0.45+200 0.25+200 0.2+200
300 mA 319.999 1 A1.5  0.45+200 0.25+200 0.2+200
3000 mA 3199.99 10 A0.5  0.45+200 0.25+200 0.2+200
*1: AC filter: SLOW, Integration time: 10 PLC, Display digit: 5 1/2, Sinusoidal input current
Input
terminal
Range
Maximum
display
Resolution
Resistance
between
input
terminals
Measurement accuracy *1
(% of reading + digits) 23C5C
20 Hz -
45 Hz
45 Hz -
100 Hz
100 Hz -
5 kHz
mA-COM 3000 A 3199.9 100 nA 10.5  0.45+20 0.25+20 0.2+20
30 mA 31.999 1 A 10.5  0.45+20 0.25+20 0.2+20
300 mA 319.99 10 A1.5  0.45+20 0.25+20 0.2+20
3000 mA 3199.9 100 A0.5  0.45+20 0.25+20 0.2+20
*1: AC filter: SLOW, Integration time: 10 PLC, Display digit: 4 1/2, Sinusoidal input current
Range
Crest factor
(% of reading + % of range)
1 to 2 2 to 3
3000  0+0.05 0+0.15
30 mA 0.01+0.05 3+0.15
300 mA 0+0.05 0.3+0.15
3000 mA 0+0.05 0.03+0.15