National Instruments Welding System 321645c-01 Manual Do Utilizador
Chapter 2
Function Reference — Calibrate_DSA
©
National Instruments Corporation
2-55
NI-DAQ FRM for PC Compatibles
Calibrate_DSA
Format
status = Calibrate_DSA (deviceNumber, operation, refVoltage)
Purpose
Use this function to calibrate your DSA device.
Parameters
Input
Parameter Discussion
The legal range for operation is given in terms of constants defined in a header file. The header
file you should use depends on the language you are using:
file you should use depends on the language you are using:
•
C programmers—
NIDAQCNS.H
(
DATAACQ.H
) for LabWindows/CVI)
•
BASIC programmers—
NIDAQCNS.INC
Visual Basic for Windows programmers
should refer to the Programming Language Considerations section in Chapter 1,
Using the NI-DAQ Functions, for more information.
Using the NI-DAQ Functions, for more information.
•
Pascal programmers—
NIDAQCNS.PAS
operation determines the operation to be performed.
Range:
Range:
ND_SELF_CALIBRATE
—
Self-calibrates the device.
ND_EXTERNAL_CALIBRATE
—
Externally calibrates the device.
ND_RESTORE_FACTORY_CALIBRATION
—
Calibrates the device using internal factory
reference.
refVoltage is the value of the DC calibration voltage connected to analog input channel 0
when operation is
when operation is
ND_EXTERNAL_CALIBRATE
. This parameter is ignored when operation is
set to
ND_EXTERNAL_CALIBRATE
or
ND_RESTORE_FACTORY_CALIBRATION
.
Range:+1.0 to +9.99 V.
To achieve the highest accuracy, use a reference voltage between +5.0 and +9.99 V.
Name
Type
Description
deviceNumber
i16
assigned by configuration utility
operation
u32
operation to be performed
refVoltage
f64
DC calibration voltage