NI 4070/4072 Calibration Procedure 22 ni.com
31. Reset the calibrator for safety reasons.
You have completed verifying the AC voltage of the NI4070/4072. Select
one of the following options:
• If you want to continue verifying other modes, go to the Verifying
4-Wire Resistance section.
• If you do not want to verify other modes and you are performing a
post-adjustment verification, go to the Completing the Adjustment
Procedures section.
• If you do not want to verify any additional modes and you are
performing a pre-adjustment verification, call niDMM_close to close
the session.
Verifying 4-Wire Resistance
To verify the 4-wire resistance of the NI 4070/4072, complete the
following steps:
1. Reset the calibrator.
2. Fasten the connectors on one end of each Fluke 5440 cable to the
appropriate banana plug connectors on the NI 4070/4072. Fasten the
connectors on the other end of each Fluke 5440 cable to the appropriate
calibrator binding posts. Figure 2 shows the Fluke 5440 cables. Table 7
lists the cable connections.
Figure 2. Cable Connections for 4-Wire Resistance
1 NI4070/4072 2 Fluke 5700A/5720A Calibrator 3 Fluke 5440 Cables
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
WHI
LO
HI
LO
HI
SENSE
VΩ
OUTPUT
VΩA
AUX
CURRENT
GUARD GROUND
1
2
3