7451A/7461A/7461P Digital Multimeter Operation Manual
7. SPECIFICATIONS
7-1
7. SPECIFICATIONS
7.1 Specifications
Unless otherwise specified, the measurement accuracy of this instrument is guaranteed for one year under
the following conditions: Temperature; 23 5C, relative humidity; 85% or less (75% or less in a resistance
measurement of larger than 10 M and low power resistance measurement of larger than 1 M)
7.1.1 DC Voltage Measurement (DCV)
• 7461A/61P
Additional error depending on the integration time
Input
terminal
Range
Maximum
display
Resolution
Input impedance
*3
Measurement accuracy *1
(% of reading + digits)
Temperature coefficient
(ppm of reading + digits)/C
24 hours
23C 1C *2
90 days
23C 5C
1 year
23C 5C
Auto-zero
ON
Auto-zero
OFF
V-COM 100 mV 119.9999 100 nV More than 1 G/
10 M1%
0.0030+30.0 0.0040+35.0 0.0040+35.0 5.0+5.0 5.0+7.0
1000 mV 1199.999 1 V More than 1 G/
10 M1%
0.0020+4.0 0.0030+5.0 0.0040+5.0 5.0+1.0 5.0+5.0
10 V 11.99999 10 V More than 1 G/
10 M1%
0.002+3.0 0.0030+3.0 0.0035+3.0 5.0+1.0 5.0+5.0
100 V 119.9999 100 V 10 M1% 0.0020+5.0 0.0035+5.0 0.0045+5.0 5.0+1.0 5.0+5.0
1000 V 1099.999 1 mV 10 M1% 0.0020+5.0 0.0035+5.0 0.0040+5.0 5.0+1.0 5.0+5.0
BchHi-
COM
10 V 11.99999 10 V More than 1 G 0.002+3.0 0.0030+3.0 0.0035+3.0 5.0+1.0 5.0+5.0
*1 Integration time: 10 PLC, Display digit: 6 1/2, Auto-zero: ON
*2 Relative value with respect to the calibration standard
*3 In the 100 mV, 1000 mV, and 10 V ranges, the input impedance can be selected from either 10 M or more than 1 G.
Integration time Additional error (digits + V)
10 s IT 200 s - In a 3 1/2-digit display 2+20
200 s < IT 2 ms Includes FAST1 and FAST2. In a 4 1/2-digit display 2+20
2 ms <IT < 1 PLC - In a 5 1/2-digit display 2+20
1 PLC IT < 10 PLC Integral multiple of 1 PLC In a 6 1/2-digit display 1+0
10 PLC < IT 10 s Integral multiple of 1 PLC In a 6 1/2-digit display 2+0
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