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National Instruments Corporation
5
SCXI-1520 Calibration Procedure
6.
Call
SCXI_MuxCtr_Setup
to configure the DAQ device counter for
use as a multiplexer counter during SCXI channel scanning. Set the
following parameters:
•
deviceNumber
—The value assigned by MAX
•
enable
—1
•
scanDiv
—1
•
ctrValue
—1
7.
Connect the calibrator to the appropriate analog input, starting
with channel 0. Refer to Table 1 to determine which pins on the 96-pin
front connector correspond to the positive and negative inputs of the
specified channel. For example, the positive input for channel 0 (S0+)
is pin C32. The negative input for channel 0 (S0–) is pin B32. If you
are using an SCXI-1314 terminal block, connect the calibrator to the
S0+ and S0– inputs.
8.
Call
SCXI_SCAN_Setup
to set up the SCXI chassis to perform a
multiplexed scanning data acquisition. Set the following parameters:
•
SCXIchassisID
—The value assigned by MAX
•
numModules
—1
•
moduleList
—{1}
1
•
numChans
—{1}
•
startChans
—{The channel number from step 7}
•
DAQdeviceNumber
—The value assigned by MAX
•
modeFlag
—0
9.
Call
SCXI_Configure_Filter
to configure the filter on the module.
Set the following parameters:
•
chassisID
—The value assigned by MAX
•
moduleSlot
—1
•
channel
—The channel number from step 7
•
filterMode
—0
•
freq
—0
•
cutoffDivDown
—0
•
outClkDivDown
—0
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
1
Array notation: {
X
} denotes a one-element array initialized with the value
X
; [
Y
] denotes an uninitialized array of size
Y
.