NI PXIe-4353 Calibration Procedure
10
ni.com
Module Calibration Adjustment
Complete the following steps to adjust the input voltage and CJC resistance calibration constants of the
module.
1.
Using banana-jack terminated copper wire, connect the positive and negative terminals of the
INPUT V
Ω
HI and LO terminals of the CAL-4353 to the Fluke 5520A or equivalent calibrator.
Connect the SENSE
Ω
HI and LO terminals of the CAL-4353 to the calibrator Sense HI and LO
terminals while referring to Figure 2.
2.
Open a calibration session on your module using the DAQmx Initialize External Calibration VI.
The default password is
NI
.
3.
Configure the CAL-4353 using the DAQmx Connect SC Express Calibration Accessory
Channels VI. Set the connection to
_tc_calibration
and the physical channels
to
Dev1/ai0:31
.
4.
Set the calibrator to 70 mV and wait for the calibrator output to settle.
5.
To reduce the loading error when using a Fluke 5520A, set the voltage range to 3.3 V as follows:
a.
On the front panel, set the output voltage to 2.0 V.
b.
Press the
3.3 V Auto
button, which will display 3.3 V locked. The output will no longer
auto-range.
c.
Set the output to the desired voltage level using Table 4.
LabVIEW Block Diagram
NI-DAQmx Function Call
Call
DAQmxInitExtCal
with the following parameters:
deviceName
:
Dev1
password
:
NI
calHandle
:
&calHandle
LabVIEW Block Diagram
NI-DAQmx Function Call
Call
DAQmxConnectSCExpressCalAccChans
with the
following parameters:
calHandle
:
calHandle
channelNames
:
Dev1/ai0:31
connection
:
_tc_calibration
