ADCMT 7451A, Руководство по эксплуатации

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7451A/7461A/7461P Digital Multimeter Operation Manual
7.1.4 DC Current Measurement (DCI)
7-10
7.1.4 DC Current Measurement (DCI)
• 7461A/61P
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.
• 7451A/61P
Input
terminal
Range
Maximum
display
Resolution
Resistance
between
input
terminals
Measurement accuracy *1

(% of r digits)
Temperature coefficient

(ppm of r digits)/

C
24 hours
23

C

1

C *2
90 days
23

C

5

C
1 year
23

C

5

C
Auto-zero
ON
Auto-zero
OFF
mA-COM 1000

A 1199.999 1 nA 103

0.005+15 0.0180+20.0 0.0200+20.0 30.0+5.0 30.0+6.0
10 mA 11.99999 10 nA 10.5

0.005+15 0.0250+20.0 0.0250+30.0 30.0+5.0 30.0+6.0
100 mA 119.9999 100 nA 1.5

0.008+15 0.0250+20.0 0.0250+30.0 35.0+5.0 35.0+6.0
1000 mA 1199.999 1

A 0.5

0.03+15 0.0300+20.0 0.0500+30.0 50.0+10.0 50.0+10.0
3 A 3.19999 10

A 0.5

0.1+15 0.1000+20.0 0.1000+30.0 50.0+20.0 50.0+30.0
*1 Integration time: 10 PLC, Display digit: 6 1/2, Auto-zero: ON
*2 Relative value with respect to the calibration standard
Integration time Additional error (

digit)
10

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 2
2 ms < IT < 1 PLC - In a 5 1/2-digit display 2
1 PLC

IT < 10 PLC Integral multiple of 1 PLC In a 6 1/2-digit display 1
10 PLC < IT

10 s Integral multiple of 1 PLC In a 6 1/2-digit display 2
Input
terminal
Range
Maximum
display
Resolution
Resistance
between
input
terminals
Measurement accuracy *1

(% of r digits)
Temperature coefficient

(ppm of r digits)/

C
24 hours
23

C

1

C *2
90 days
23

C

5

C
1 year
23

C

5

C
Auto-zero
ON
Auto-zero
OFF
mA-COM 3000

A 3199.99 10 nA 10.5

0.01+30 0.0300+40.0 0.0500+40.0 45.0+4.0 45.0+10.0
30 mA 31.9999 100 nA 10.5

0.01+4.5 0.0300+6.0 0.0500+6.0 45.0+0.6 45.0+7.0
300 mA 319.999 1

A 1.5

0.03+4.5 0.0600+6.0 0.1000+6.0 50.0+0.6 50.0+7.0
3000 mA 3199.99 10

A 0.5

0.12+4.5 0.1200+6.0 0.1200+6.0 50.0+0.6 50.0+7.0
*1 Integration time: 10 PLC, Display digit: 5 1/2, Auto-zero: ON
*2 Relative value with respect to the calibration standard