National Instruments NI 6731, Процедура калибровки

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NI 6711/6713/6731/6733 Calibration Procedure 6 ni.com
Verifying the Performance of the NI 6711/6713/6731/6733
Verification determines how well the device is meeting its specifications.
The verification procedure is divided into the major functions of the device.
Throughout the verification process, refer to the tables in the
Specifications
section to see if the device needs adjustment.
Verifying Analog Output
This procedure verifies the AO performance of the
NI 6711/6713/6731/6733. NI recommends testing all channels of the
device. However, to save time, you can test only the channels used in your
application. Make sure that you have read the
Equipment and Other Test
Requirements section before starting this procedure.
1. Disconnect all cables to the device. Make sure the device is not
connected to any circuits other than those specified by the calibration
procedure.
2. To internally calibrate the device, call the
Calibrate_E_Series
function with the following parameters set as indicated:
• calOP set to
ND_SELF_CALIBRATE
• setOfCalConst set to
ND_USER_EEPROM_AREA
• calRefVolts set to
0
3. Connect the DMM to DAC0OUT as shown in Table 1.
4. Refer to the table from the Specifications section that corresponds
to the device you are verifying. This specification table shows all
acceptable settings for the device.
Table 1. Connecting the DMM to DAC0OUT
Output Channel DMM Positive Input DMM Negative Input
DAC0OUT DAC0OUT (pin 22) AOGND (pin 56)
DAC1OUT DAC1OUT (pin 21) AOGND (pin 55)
DAC2OUT DAC2OUT (pin 57) AOGND (pin 23)
DAC3OUT DAC3OUT (pin 25) AOGND (pin 58)
DAC4OUT DAC4OUT (pin 60) AOGND (pin 26)
DAC5OUT DAC5OUT (pin 28) AOGND (pin 61)
DAC6OUT DAC6OUT (pin 30) AOGND (pin 63)
DAC7OUT DAC7OUT (pin 65) AOGND (pin 63)
Note: Pin numbers are given for 68-pin I/O connectors only. If you are using a 50-pin
I/O connector, refer to the device user manual for signal connection locations.