NI 4071 7½-Digit FlexDMM Calibration Procedure
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© National Instruments
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17
29. Connect the NI 4071 and the Fluke 5720A calibrator using the Fluke 5440 cable, as shown
in Figure 1. Table 2 lists the cable connections.
Figure 1.
Cable Connections for Voltage and 2-Wire Resistance
30. Wait two minutes for the thermal EMF to stabilize.
31. Generate 90 mV on the calibrator with the range locked to 2.2 V.
Note
This calibrator range prevents a 50
output resistance from creating
a voltage divider with the internal resistance of the NI 4071.
1
NI 4071
2
Fluke 5720A Calibrator
3
Fluke 5440 Cable
Table 2.
Fluke 5440 Cable Connections
Banana Plug
Connector
(NI 4071)
Banana Plug Color
(Fluke 5440 Cable)
Binding Post Label
(Fluke 5720A Calibrator)
HI
Red
OUTPUT HI
LO
Black
OUTPUT LO
(No connection)
Blue
V GUARD
HI
LO
AUX
I/O
300V
MAX
5V
MAX
AMPS
NI PXI-4071
7
1
/
2
-Digit FlexDMM
500V MAX
CAT I
HI
LO
1kV
MAX
3A, 250V
MAX
INPUT
1kV
MAX
HI
LO
HI
LO
HI
AUX
CURRENT
GUARD
GROUND
1
2
3