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National Instruments Corporation
11
SCXI-1520 Calibration Procedure
10. Call
SCXI_Set_Potentiometer
to set the fine potentiometer to the
center position. Set the following parameters:
•
SCXIchassisID
—The value assigned by MAX
•
moduleSlot
—1
•
channel
—The channel number from step 7
•
value
—2048
•
pottype
—1
11. Call
SCXI_Set_Potentiometer
to set the coarse potentiometer
to the center position. Set the following parameters:
•
SCXIchassisID
—The value assigned by MAX
•
moduleSlot
—1
•
channel
—The channel number from step 7
•
value
—62
•
pottype
—0
12. Call
SCXI_Set_Excitation
to set the excitation voltage to zero.
Set the following parameters:
•
SCXIchassisID
—The value assigned by MAX
•
moduleSlot
—1
•
moduleChan
—The channel number from step 7
•
excitationType
—2
•
excitationValue
—0
SCXI_Set_Excitation
returns a 32-bit floating-point number
called
actualExcitationValuePtr
.
13. Call
SCXI_Configure_Connection
to configure the channel for
a full-bridge connection. Set the following parameters:
•
SCXIchassisID
—The value assigned by MAX
•
moduleSlot
—1
•
moduleChan
—The channel number from step 7
•
connectionType
—6
14. Call
SCXI_Set_Gain
to set the gain you want to test on the module.
Set the following parameters:
•
SCXIchassisID
—The value assigned by MAX
•
moduleSlot
—1
•
channel
—The channel number from step 7
•
gain
—The gain value you want to test. Refer to Table 2 for gain
values and test points.