National Instruments NI 4070/4072 6 1/2-Digit FlexDMM 用户手册
NI 4070/4072 Calibration Procedure
10
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Figure 1. Cable Connections for Voltage and 2-Wire Resistance
23. Wait two minutes for the thermal EMF to stabilize.
24. Generate 0 V on the calibrator.
25. Call
niDMM_ConfigureMeasurement
with the following
parameters:
•
Function =
NIDMM_VAL_DC_VOLTS
•
Range =
0.1
•
Resolution =
100e–9
26. Set the input resistance of the NI 4070/4072 to >10 G
Ω by calling
niDMM_SetAttributeViReal64
with the following parameters:
•
Attribute_ID =
NIDMM_ATTR_INPUT_RESISTANCE
•
Attribute_Value =
NIDMM_VAL_GREATER_THAN_10_GIGAOHM
1
NI 4070/4072
2
Fluke 5700A/5720A Calibrator
3
Fluke 5440 Cable
Table 1. Fluke 5440 Cable Connections
Banana Plug Connector
(NI 4070/4072)
Banana Plug Color
(Fluke 5440 Cable)
(Fluke 5440 Cable)
Binding Post Label
(Fluke 5700A/5720A Calibrator)
HI
Red
OUTPUT HI
LO
Black
OUTPUT LO
(No connection)
Blue
V GUARD
HI
LO
300V
MAX
HI
LO
AUX
I/O
1A, 250V
MAX
300V
MAX
5V
MAX
AMPS
INPUT
SENSE
W 4W
6½-Digit FlexDMM
CAT II
V
W
HI
LO
HI
LO
HI
SENSE
V
Ω
OUTPUT
V
ΩA
AUX
CURRENT
GUARD
GROUND
1
2
3