Agilent Technologies 3458A Calibration Manual page 40

40 Chapter 4 Performance Verification Tests
allow the range relay and short to thermally stabilize. NOTE: The
thermal stabilization achieved for the 100 mV range is present for the
1V and 10V ranges since these ranges use the same relays. The range
relays are opened for the 100V and 1000V ranges and therefore, have
no thermal impact on the measurement.
5. Execute Trig SGL and read the output of the DC voltage source as
measured with the transfer standard DMM and record this reading in
the "Transfer Standard Reading" column of the DC VOLTAGE
TESTS test card.
6. Remove the connection from the transfer standard DMM to the DC
voltage source.
7. Connect the 3458A under test to the DC voltage source.
8. Execute Trig SGL 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 voltage Test Record.
9. Repeat steps 1 through 8 for each of the remaining DC voltage test
points as specified in Table 2.
Table 2. DCV Gain Performance Tests
DC Gain Test
Number
1
2
3
4
5
6
7
a
8
NOTE: After completing test 8, decrease the 1000V DCV standard
a.
output to 0V before disconnecting.
10. After all DC 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 of the test points.
11. If any of the differences calculated are beyond the specified limits,
refer to Chapter 3. "Adjustment Procedures", to make adjustments.
DMM Range
100 mV
1 V
10 V
10 V
10 V
10 V
100 V
1000 V
Source Output
100 mV
1 V
1 V
-1 V
-10 V
10 V
100 V
1000 V