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34410A/11A User’s Guide
4
Measurement Tutorial
High-Speed Measurements
Making High
–
Speed AC Measurements
The multimeter's ac voltage and ac current functions implement three
different low–frequency filters. These filters allow you to trade–off
minimum measured frequency for faster reading speed. The
FAST
filter
settles in 0.025 seconds, and is useful for frequencies above 200 Hz. The
MEDIUM
filter settles in 0.63 seconds for voltage and 0.25 seconds for
current, and is useful for measurements above 20 Hz. The
SLOW
filter
settles in 2.5 seconds for voltage and 1.67 seconds for current, and is
useful for frequencies above 3 Hz.
With a few precautions, you can perform ac measurements at speeds up to
500 readings per second. Use manual ranging to eliminate autoranging
delays. By setting the trigger delay to 0, the
FAST
,
MEDIUM
, and
SLOW
filters
will allow up to 500, 150, and 50 readings per second, albeit with reduced
accuracy, since the filter may not fully settle. If the sample–to–sample
levels are similar, little settling time is required for each new reading.
Under this specialized condition, the
MEDIUM
filter will provide reduced
accuracy results at 20 readings per second, and the
FAST
filter will provide
reduced accuracy results at 200 readings per second.
In applications where sample–to–sample levels vary widely, but the dc
offset level does not change, the
MEDIUM
filter will settle at 2 to 4 readings
per second (depending upon the lowest frequency component in the
waveform) as shown in the following table:
AC Filter
Filter
Bandwidth
Settling Time
(Seconds)
Full Settling
(rdgs/Sec)
Partial
Settling
Maximum
rdgs/Sec
ACV
ACI
ACV
ACI
ACV/ACI
ACV/ACI
Slow
3 Hz
2.5
1.67
0.4
0.6
2
50
Medium 20
Hz
0.63
0.25
1.6
4
20
150
Fast
200 Hz
0.025
0.025
40
40
200
500
Medium Filter Performance
Full Accuracy Reading Rate
No DC Level Change
Lowest Frequency Component
20 Hz
50 Hz
100 Hz
200 Hz
AC Current (allowable rate rdgs/Sec)
4
4
4
4
AC Voltage (allowable rate rdgs/Sec)
2
3
4
4
Summary of Contents for 34410A
Page 1: ...Agilent Technologies Agilent 34410A 11A 6 Digit Multimeter User s Guide...
Page 6: ...6 34410A 11A User s Guide...
Page 12: ...12 34410A 11A User s Guide...
Page 34: ...34 34410A 11A User s Guide 1 Quick Start...
Page 96: ...96 34410A 11A User s Guide 3 Remote Interface Configuration...
Page 106: ...106 34410A 11A User s Guide 4 Measurement Tutorial...
Page 120: ...120 34410A 11A User s Guide 4 Measurement Tutorial...
Page 140: ...140 34410A 11A User s Guide 5 Specifications...
