Agilent 34970A/34972A Data Acquisition / Switch Unit

Chapter 4 Calibration Procedures
Internal DMM Verification Tests
AC CURRENT Gain Verification Test
Configuration: AC Current
LF 3 HZ:SLOW (in the Advanced menu)
1 Make sure you have read “Test Considerations” on page 81.
2 Select Channel 221, set the AC CURRENT 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.)
1 kHz
Input Range Quick Error from Nominal
Check
Current Frequency 24 hour 90 day 1 year
10 mA [1]
10 mA
± 14 A ± 14 A ± 14 A
10 mA
1 A [1] 1 kHz 1 A
± 1.41 mA ± 1.41 mA ± 1.41 mA
1 kHz 1 A
± 1.4 mA ± 1.4 mA ± 1.4 mA
100 mA [1] 1 kHz 100 mA Q ± 600 A ± 600 A ± 600 A
[1] Verify only, no adjustment.
4
Frequency Gain Verification Test
Configuration: Frequency
6½ digits
1 Make sure you have read “Test Considerations” on page 81.
2 Select Channel 210, select the FREQUENCY function and set 6½ digits.
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
Voltage Frequency 24 hour 90 day 1 year
10 mV [1]
1 V
100 Hz
100 kHz
100 mV
1 V Q
± 0.06 Hz
± 6 Hz
± 0.1 Hz
± 10 Hz
± 0.1 Hz
± 10 Hz
[1] Verify only, No adjustment. For this test, isolate the calibrator’s output from earth ground.
Q: Quick performance verification test points.
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