7451A/7461A/7461P Digital Multimeter Operation Manual
7.1.5 AC Current Measurement (ACI, ACI(AC+DC))
7-11
Additional error depending on the integration time
Maximum allowable applied current
Between mA and COM terminals
3A (DC or ACrms)
Input protection
By using the 3.15 A/250 V fast blow fuse which is compliant with
IEC60127-2 sheet1
The fuse can be changed on the rear panel.
7.1.5
AC Current Measurement (ACI, ACI(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 (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
Integration time
Additional error (
digit)
100
s
IT < 200
s
-
In a 3 1/2-digit display
2
200
s
IT
2 ms
Includes FAST1 and FAST2. In a 4 1/2-digit display
10
2.01 ms < IT < 9.99 ms
-
In a 5 1/2-digit display
20
10 ms < IT < 1 PLC
-
In a 5 1/2-digit display
2
1 PLC
IT < 10 PLC
Integral multiple of 1 PLC
In a 5 1/2-digit display
1
10 PLC < IT
10 s
Integral multiple of 1 PLC
In a 5 1/2-digit display
2
Input
terminal
Range
Maximum
display
Resolution
Resistance
between
input
terminals
Measurement accuracy *1
(% of r digits) 23
C
5
C
20 Hz -
45 Hz
45 Hz -
100 Hz
100 Hz -
5 kHz
mA-COM
1000
A
1199.999
1 nA
103
0.45+400
0.25+400
0.11+400
10 mA
11.99999
10 nA
10.5
0.45+400
0.25+400
0.11+400
100 mA
119.9999
100 nA
1.5
0.45+400
0.25+400
0.11+400
1000 mA
1199.999
1
A
0.5
0.45+400
0.25+400
0.11+400
3 A
3.19999
10
A
0.5
0.45+120
0.25+120
0.15+120
*1:
AC filter: SLOW, Integration time: 10 PLC, Display digit: 6 1/2, Sinusoidal input current
