Fluke 74X Series - DC Current Source

Performance Verification Tests
19
DC Current Source
Proceed as follows to verify the DC Current Source function.
1. Connect the UUT to the HP3458A as shown in Figure 7 .
2. Set the 3458A [NPLC] to 30, and the function to [DC Current].
3. Set the UUT to DC Current Source (not Simulate Transmitter) function at 2 mA.
4. Observe that the reading on the 3458A is within the range shown under the
appropriate column in Table 9 .
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
Ω SENSE INPUT
HI
LO
GUARD
HI
LO
HP3458
FLUKE 74X
i
gb08f.eps
Figure 7. DC Current Source Verification Connections
Table 9. DC Current Source Verification Points
UUT
Range
UUT
Output
Minimum
1 Year
Maximum
1 Year
Minimum
2 Year
Maximum
2 Year
22 mA 2 mA 1.9965 2.0035 1.9963 2.0037
22 mA 4 mA 3.9963 4.0037 3.9959 4.0041
22 mA 22 mA 21.9945 22.0055 21.9923 22.0077