Ohms Performance Tests; Required Equipment; Preliminary Steps - Agilent Technologies 3458A Calibration Manual

Ohms Performance Tests

Required Equipment

Preliminary Steps

current source.
7. Connect the DC current source to the 3458A under test HI and LO
input terminals.
8. Execute Trig and read the value as measured with the 3458A under
test and record this value in the "Unit Under Test Reading" column of
the DC CURRENT TESTS Test Card.
9. Repeat steps 1 through 8 for each of the remaining DC current test
points as specified in Table 5.
Table 5.
DCI Gain Test
Number
1
2
3
4
5
10. After all DC current gain tests have been performed, calculate and
record in the column provided, the difference (absolute value) between
the transfer standard DMM reading and the unit under test reading for
each test point.
11. If any of the differences calculated are beyond the specified limits,
refer to Chapter 3, "Adjustment Procedures", to make adjustments.
12. Reduce the output of the DC Current Source and disconnect it from
the 3458A input terminals.
The following list of equipment is required to test the ohms performance of
the 3458A.
•
Stable resistance standard (Fluke 5700A or equivalent)
•
Transfer standard DMM (3458A Opt. 002 within 90 days of CAL)
•
Low thermal short (copper wire)
•
Low thermal test leads (such as Agilent 11053A, 11174A, or 11058A)
1. Verify that the resistance standard is properly warmed up.
2. The 3458A requires a 4-hour warm-up period. If this has not been
DCI Gain Performance Tests
Source and DMM
Range
µ
100 A
1 mA
10 mA
100 mA
1 A
Chapter 4 Performance Verification Tests
Source Output
µ
100 A
1 mA
10 mA
100 mA
1 A
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