ADCMT 7451A, Руководство по эксплуатации

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7451A/7461A/7461P Digital Multimeter Operation Manual
7.1.2 AC Voltage Measurement (ACV, ACV(AC+DC))
7-5
Additional error depending on the integration time AC filter: SLOW
• 7451A
Measurement method True RMS measurement, RMS display
Input range 5% or more of a full scale
Crest factor 3:1 at a full scale
Temperature coefficient (1/10 of measurement accuracy that includes the additional error)/

C in each
range and frequency range
ACV
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 4
2 ms < IT < 1 PLC - In a 5 1/2-digit display 20
1 PLC

IT < 10 PLC - In a 6 1/2-digit display 120
10 PLC < IT

10 s - In a 6 1/2-digit display 2
Input
terminal
Range
Maximum
display
Resolution Input impedance
Measurement accuracy *1

(

of reading

digits)
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 300 mV 319.999 1

V 1 M

2%,
140 pF or less
0.28+120 0.1+120 0.06+120 0.2+150 0.6+240 5+1500
3000 mV 3199.99 10

V 1 M

2%,
140 pF or less
0.28+120 0.1+120 0.06+120 0.2+150 0.6+240 4+1500
30 V 31.9999 100

V 1 M

2%,
140 pF or less
0.28+120 0.1+120 0.06+120 0.2+150 0.6+240 4+1500
300 V 319.999 1 mV 1 M

2%,
140 pF or less
0.28+120 0.1+120 0.06+120 0.2+150 0.6+240 4+1500
700 V 749.99 10 mV 1 M

2%,
140 pF or less
0.28+28 0.1+28 0.06+28 - - -
*1 AC filter: SLOW, Integration time: 10 PLC, Display digit: 5 1/2, Sinusoidal input voltage
The input voltage is restricted to 2.2

10
7
V•Hz in the 300 V and 700 V ranges.
*2 100 kHz-200 kHz in the 300 mV and 3000 mV ranges