Agilent 34970A/34972A Data Acquisition / Switch Unit

Chapter 4 Calibration Procedures
Internal DMM Verification Tests
AC VOLTS Gain Verification Test
Configuration: AC Volts
LF 3 HZ:SLOW (in the Advanced menu)
1 Make sure you have read “Test Considerations” on page 81.
2 Select Channel 210, set the AC VOLTS function and the 3 Hz input
filter. With the slow filter selected, each measurement takes 7 seconds to
complete. Before executing each test, you must press to enable
reading monitoring on the selected channel (or use the ROUTe:MON
command from the remote interface).
3 Select each range in the order shown below. Compare measurement
results to the appropriate test limits shown in the table. (Be certain to
allow for appropriate source settling.)
Input Range Quick
Error from Nominal
Check
V rms Frequency 24 hour 90 day 1 year
100 mV
100 mV
± 70 V ± 90 V ± 100 V
100 mV
1 V
1 V
10 V
10 V
10 V
10 mV [1]
100 V
100 V
300 V
300 V [2] 1 kHz
50 kHz
1 kHz
50 kHz
1 kHz
50 kHz
10 Hz
1 kHz
1 kHz
50 kHz
1 kHz
50 kHz
Q
Q
Q
± 150 V
± 700 V
± 1.5 mV
± 7 mV
± 15 mV
± 7 mV
± 34 V
± 70 mV
± 150 mV
± 270 mV
± 600 mV
± 160 V
± 900 V
± 1.6 mV
± 9 mV
± 16 mV
± 9 mV
± 45 V
± 90 mV
± 160 mV
± 390 mV
± 690 mV
± 170 V
± 1 mV
± 1.7 mV
± 10 mV
± 17 mV
± 10 mV
± 46 V
± 100 mV
± 170 mV
± 420 mV
± 720 mV
1 V
10 V
100 mV
100 v
300V
[1] For this test, isolate the calibrator’s output from earth ground.
[2] Some calibrators may have difficulty driving the internal DMM and cable load at this V-Hz
output. Use short, low capacitance cable to reduce calibration loading. Verification can be
performed at >195 Vrms. New test limits can be computed from the accuracy specification
shown in Chapter 1 for the actual test conditions used.
Q: Quick performance verification test points.
Note: The 50 kHz AC voltage test points may fail performance
verification if the internal shields have been removed and reinstalled. See
“Gain Adjustment,” on page 92, for further information on how to
recalibrate the AC voltage function.
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