National Instruments NI 4070/4072 6 1/2-Digit FlexDMM User Manual

© National Instruments Corporation

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 Table 8 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 Table 8 for the current iteration. Make sure that the 
external sense is turned on but 2-wire compensation is turned off.

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 Table 8 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 Table 8 for 

the current iteration.

d.

Call 

niDMM_Read

. Verify that this measurement falls between the 

tolerances listed in Table 17. Tolerances are provided instead of 
absolute limits because your calibrator will have different discrete 
resistance values.

Table 7.  Fluke 5440 Cable Connections

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