Agilent Technologies 34970A, Service Manual, Page: 81 / 273

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 71.
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.)
Input
Current Frequency
Range
Quick
check
Error from Nominal
24 hour 90 day 1 year
10 mA
[1]
100 mA
[1]
10 mA
1A
[1]
1 kHz
1 kHz
1 kHz
1 kHz 10 mA
100 mA
1 A
1A
Q
± 14 µ A
± 600 µ A
± 1.41 mA
±
1.4 mA
± 14 µ A
± 600 µ A
± 1.41 mA
±
1.4 mA
± 14 µ A
± 600 µ A
± 1.41 mA
±
1.4 mA
[1] Verify only, no adjustment.
Frequency Gain Verification Test
Configuration: Frequency
6 1 ⁄
2
digits
1
Make sure you have read “Test Considerations” on page 71.
2
Select Channel 210, select the FREQUENCY function and set 6 1 ⁄
2
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
Voltage Frequency
Range
Quick
Check
Error from Nominal
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.
4
Chapter 4 Calibration Procedures
Internal DMM Verification Tests
79