National Instruments SCXI-1141, Calibration Procedure

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SCXI-1141/1142/1143 Calibration Procedure 6 ni.com
Verifying Analog Input Measurements
Complete the following steps to verify the analog input offsets of the
SCXI-1141/1142/1143:
1. Read the Test Conditions section in this document.
2. Refer to Table 9 for the specifications to test. Table 9 shows all
acceptable settings for the module. NI recommends that you verify all
ranges and gains. However, you can save time by checking only the
ranges that your application uses.
3. Ensure that the E Series DAQ device is connected to the SCXI module.
4. Call
Calibrate_E_Series
to minimize any uncertainty associated
with the E Series DAQ device. Set the following parameters:
• device —The Traditional NI-DAQ (Legacy) device number
assigned by MAX
• calOp —
ND_SELF_CALIBRATE
• setOfCalConst —
ND_USER_EEPROM_AREA
• calRefVolts —0.0
5. Call
MIO_Config
to enable dithering on the E Series DAQ device
measurements. Set the following parameters:
• DAQdeviceNumber —The Traditional NI-DAQ (Legacy) device
number assigned by MAX
• dither —1
• useAMUX —0
6. Call
SCXI_Single_Chan_Setup
to configure the module for
single-channel measurements. Set the following parameters:
• SCXIchassisID —The chassis ID value obtained from MAX
• moduleSlot —1
• moduleChan —0
• DAQdeviceNumber —The cabled device number assigned by
MAX to the E Series DAQ device
7. Call
SCXI_Set_Gain
to configure the module to the gain value you
want to test. Set the following parameters:
• SCXIchassisID —The value obtained from MAX
• moduleSlot —1
• moduleChan —0
• gain —The gain value from Table 9 that you want to test
8. Call
SCXI_Configure_Filter
to disable the filter.
Set the following parameters:
• SCXIchassisID —The value obtained from MAX