National Instruments PXIe-4353, Calibration Procedure

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NI PXIe-4353 Calibration Procedure 8 ni.com
CJC Resistance Accuracy Verification
Complete the following steps to test the CJC resistance accuracy performance of the module.
1. Using banana-jack terminated copper wire, connect the positive and negative terminals of the
resistance calibrator to the INPUT V
Ω
HI and LO inputs of the CAL-4353. Also connect the
SENSE
Ω
HI and LO terminals of the CAL-4353 to the Sense HI and LO terminals of the
resistance calibrator while referring to Figure 2.
2. Set the resistance calibrator to 2-wire compensation mode.
Note When using the Fluke 5520A, set the calibrator to 2-WIRE COMP mode.
Figure 2.
CAL-4353 to Fluke 5520A Calibrator Connections
3. Open a DAQmx calibration session on your device.
4. Call the DAQmx Connect SC Express Calibration Accessory Channels VI. Configure the
CAL-4353 by setting the connection to
_cjc_calibration
and the physical channels to the
CJC channel you want to verify.
Note Qualify the CJC channel name by the device name. For example, the physical channel name
must have the format
Dev1/_cjtemp0
.
5. Set the calibrator resistance to a Test Point value indicated in Table 7.
6. Create and configure the CJC channel for voltage acquisition.
7. Set the ADC timing mode property to Custom and set the ADC custom timing mode property to a
value from the first column of Table 3. Use Table 3 to determine which timing mode to select.
HI
LO
TRIG
GUARD
TC
20A
NORMAL AUX SCOPE
OUT
V, , ,RTD A, -SENSE, AUX V
20V PK MAX 20V PK MAX
5520A CALIBRATOR
INPUT
V
Ω
30 VDC
MAX
HI
LO
SENSE
Ω
HI
LO
SHELLS
NOT
GROUNDED
20V
PK
MAX
150V
PK
MAX
20V
RMS
MAX
20V
RMS
MAX