Agilent Technologies 34970A Service Manual page 81

Chapter 4 Calibration Procedures
Internal DMM Verification Tests
AC CURRENT Gain Verification Test
Configuration: AC Current
LF 3 HZ:SLOW (in the Advanced menu)
Make sure you have read "Test Considerations" on page 71.
1
Select Channel 221, set the AC CURRENT function and the 3 Hz
2
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).
Select each range in the order shown below. Compare measurement
3
results to the appropriate test limits shown in the table. (Be certain
to allow for appropriate source settling.)
Input
Current Frequency
[1]
10 mA 1 kHz
[1]
100 mA 1 kHz
10 mA 1 kHz
[1]
1A 1 kHz
[1] Verify only, no adjustment.
Frequency Gain Verification Test
Configuration: Frequency
6
Make sure you have read "Test Considerations" on page 71.
1
Select Channel 210, select the FREQUENCY function and set 6
2
Select each range in the order shown below. Compare measurement
3
results to the appropriate test limits shown in the table. (Be certain to
allow for appropriate source settling.)
Input
Voltage Frequency
[1]
10 mV 100 Hz
1 V 100 kHz
[1] Verify only, No adjustment. For this test, isolate the calibrator's output from earth ground.
Q: Quick performance verification test points.
Quick
Range
check
10 mA
100 mA
Q
1 A
1A
⁄
1 digits
2
Quick
Range
Check
100 mV
1 V
Q
Error from Nominal
24 hour 90 day
± 14 µA ± 14 µA ± 14 µA
± 600 µA ± 600 µA ± 600 µA
± 1.41 mA ± 1.41 mA ± 1.41 mA
± 1.4 mA ± 1.4 mA ± 1.4 mA
1 ⁄ digits.
2
Error from Nominal
24 hour 90 day
0.06 Hz 0 .1 Hz
± ± ±
6 Hz 10 Hz
± ± ±
1 year
4
1 year
0 .1 Hz
10 Hz
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