71X Series
Calibration Manual
30
Table 38. 712 Verification Outputs
712 Outputs (Ohms) Fluke 8508A Readings (Ohms)
5.00 4.90 to 5.10
300.00 299.90 to 300.10
1500.0 1499.5 to 1500.5
3000.0 2999.0 to 3001.0
14. Disconnect all connections to the 712. The 712 verification test is complete.
712 Verification (V2.0 and Later)
1. Push button until Input comes up on the display.
2. Push until PT100 392 JIS is on the display.
3. Push until 4W is on the display. Set temperature standard to C.
4. Set the 5520A to 2-wire output with 2-wire compensation turned off; then make 2-
wire connections on the 5520A to 4-wire connections on the 712. Set the 5520A to
PT 3916 (ITS-90) mode.
5. Set the 5520A to output the RTD (resistance) values in Table 39. Verify that the
temperature readings are within the limits shown for 4-wire UUT.
Table 39. 712 Verification RTD Values
5520A Outputs (C) 3-wire 712 Readings ( C) 4-wire 712 Readings ( C)
-180 (25.799 Ω) -179.72 to -180.28 -179.8 to -180.2
100 (139.171 Ω) 99.6 to 100.4 99.7 to 100.3
300 (213.957 Ω) 299.7 to 300.3 299.6 to 300.4
550 (300.822 Ω) 549.48 to 550.52 549.6 to 550.4
6. Remove the 4-wire connection on the 712 (rightmost connection). Push once and
verify that 3W is on the display and that the temperature readings are within the
limits shown for 3-wire readings. Push to return to 4W mode.
7. Restore the 4-wire connection to the 712 and maintain 2-wire connection on the
5520A.
8. Push until Ω is displayed.
9. Set the 5520A to source resistance, to a 2-wire output, with 2-wire compensation
turned off.
10. Set the 5520A to source the resistance values in Table 40. Verify that the resistance
values on the 712 are within the limits shown.
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