Fluke 74X Series, Calibration Manual

Page: 29 / 44

Performance Verification Tests
21
Proceed as follows to verify the Resistance Source function.
1. Connect the UUT to the HP3458A as shown in Figure 9. Use a four-wire connection
transitioning to two wires at the UUT.
2. Set the UUT to the Resistance Source function at 0.1
Ω
.
3. On the 3458A, select four-wire ohms measurement and up-range to the 100
Ω
range.
Use the 100
Ω
range for the first three tests points, and autorange thereafter. The low
range of the 3458A supplies too much current back into the UUT.
4. Observe that the reading on the 3458A is within the range shown under the
appropriate column in Table 11.
5. Continue through the test points, verifying compliance to specifications.
6. When you are finished, press
c
twice on the UUT to set the Source function to off.
This saves battery life.
TC
mA mA V V
RTD
RTD
SOURCE
300V
MAX
30V
MAX
30V
MAX
30V
MAX
MEAS
CAT
FLUKE 74X
Ω
SENSE INPUT
HI
LO
GUARD
HI
LO
HP3458A MULTIMETER
gb10f.eps
Figure 9. Resistance Source Verification Connections
Table 11. Resistance Source Verification Points
UUT
Range
UUT
Output
Minimum
1 Year
Maximum
1 Year
Minimum
2 Year
Maximum
2 Year
11 ohm 0.1 ohm 0.0800 0.1200 0.0800 0.1200
11 ohm 1 ohm 0.9799 1.0201 0.9798 1.0202
11 ohm 10 ohm 9.9790 10.0210 9.9780 10.0220
110 ohm 20 ohm 19.958 20.042 19.956 20.044
110 ohm 100 ohm 99.950 100.050 99.940 100.060
1100 ohm 200 ohm 199.46 200.54 199.44 200.56
1100 ohm 1000 ohm 999.30 1000.70 999.20 1000.80
11 kohm 2 kohm 1.9944 2.0056 1.9942 2.0058
11 kohm 10 kohm 9.9920 10.0080 9.9910 10.0090