Adjusting Dc Voltage And Resistance - National Instruments PXI-4070 Manual

Adjusting DC Voltage and Resistance

Caution Step 1 must be performed correctly to avoid shorting on unconnected spade lugs.
Note You will use Cal Session in all subsequent function calls.
Note The default user password for adjusting the NI 4070 is
© National Instruments Corporation
To adjust the DC voltage and resistance of the NI 4070, complete the
following steps:
1. Connect the calibration cable assembly with the connector block
plugged into the NI 4070 and with the spade lugs connected to the
appropriate binding posts on the calibrator, as described in Figure 3
and Table 1.
2. Wait two minutes for the thermal EMF to stabilize if the calibration
cable assembly was not previously connected in this configuration.
3. Call
niDMM_InitExtCal
and your valid user password to output a calibration session
(Cal Session) that you can use to perform NI-DMM calibration or
regular measurement functions.
4. Call
niDMM_ConfigurePowerLineFrequency
Frequency set to
(in Hz) that your instruments are powered from; select
power line frequencies
5. Output 100 mV on the calibrator with the range locked to 2.2 V.
6. Call
niDMM_CalAdjustGain
• Mode =
NIDMM_VAL_DC_VOLTS
• Range =
0.1
• Input Resistance =
• Expected Measurement =
7. Output –100 mV on the calibrator with the range locked to 2.2 V.
8. Call
niDMM_CalAdjustGain
• Mode =
NIDMM_VAL_DC_VOLTS
• Range =
0.1
• Input Resistance =
• Expected Measurement =
9. Output 10 V on the calibrator.
with the resource descriptor of the NI 4070
or , depending on the power line frequency
50 60
with the following parameters:
NIDMM_VAL_10_MEGAOHM
0.1
with the following parameters:
NIDMM_VAL_10_MEGAOHM
–0.1
41
.
NI
with PowerLine
for 400 Hz
50
NI PXI-4070 Calibration Procedure