© National Instruments Corporation 23 NI 4070/4072 Calibration Procedure
3. Wait two minutes for the thermal EMF to stabilize if the Fluke 5440
cables were not previously connected in this configuration.
4. Call niDMM_reset.
5. Refer to Table8 for the appropriate calibrator output and function
parameter values as you complete the following steps:
a. On the calibrator, output the value listed in the Calibrator Output
column in Table8 for the current iteration. Make sure that the
external sense is turned on but 2-wire compensation is turned off.
Note After setting the calibrator output to 0 Ω in the seventh iteration, you do not need to
continually set the calibrator to 0 Ω for iterations 8 through 12.
b. Call niDMM_ConfigureMeasurement with the parameters set
as shown in Table8 for the current iteration.
c. Call niDMM_ConfigureOffsetCompOhms with
OffsetCompOhms set to either
NIDMM_VAL_OFFSET_COMP_OHMS_ON or
NIDMM_VAL_OFFSET_COMP_OHMS_OFF according to Table8 for
the current iteration.
d. Call niDMM_Read. Verify that this measurement falls between the
tolerances listed in Table17. Tolerances are provided instead of
absolute limits because your calibrator will have different discrete
resistance values.
Table 7. Fluke 5440 Cable Connections
Fluke 5440
CableIdentification
BananaPlug Connector
(NI4070/4072)
Banana Plug Color
(Fluke 5440Cable)
Binding Post
(Fluke 5700A/5720A Calibrator)
First cable HI Red OUTPUT HI
LO Black OUTPUT LO
(No connection) Blue V GUARD
Second cable HI SENSE Red SENSE HI
LO SENSE Black SENSE LO
(No connection) Blue V GUARD