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NI 4070/4072 Calibration Procedure
34
ni.com
15. Call
niDMM_ConfigureMeasurement
with the following
parameters:
•
Function
=
NIDMM_VAL_AC_CURRENT
•
Range
=
1
•
Resolution
=
1e–6
16. Call
niDMM_Read
. Verify that this measurement falls between the
limits listed in Table 22.
17. Output 1 A at 1 kHz on the calibrator.
18. Call
niDMM_Read
. Verify that this measurement falls between the
limits listed in Table 22.
You have completed verifying the AC current of the NI 4070/4072. Select
one of the following options:
•
If you want to continue verifying other modes, go to the
•
If you do
not
want to verify other modes
and
you are performing a
post-adjustment
verification, go to the
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 Frequency
Note
The frequency of the NI 4070/4072 is not user adjustable. If this verification
procedure indicates that the frequency is out of specification, return the NI 4070/4072
to NI for repair.
To verify the frequency of the NI 4070/4072, complete the following steps:
1.
Remove all connections from the NI 4070/4072.
Note
Polarity is
not
important in step 2.
2.
Connect a device capable of generating a pulse train at the frequencies
listed in Table 23 to the HI and LO terminals of the NI 4070/4072. The
pulse train should be 0 to 5 V and have a duty cycle of 50%. Refer to
the section for possible devices and equipment to use in this step.
3.
Call
niDMM_reset
to reset the NI 4070/4072 to a known state.