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National Instruments Corporation

5

NI 6711/6713/6731/6733 Calibration Procedure

Flowcharts

section for illustrations of the code used at each step of the

calibration procedure.

Often you must follow a number of compiler-specific steps to create an
application that uses NI-DAQ. Refer to the

NI-DAQ User Manual for PC

Compatibles

at

ni.com/manuals

for details about the required steps for

each of the supported compilers.

Many of the functions listed in the calibration procedure use variables that
are defined in the

nidaqcns.h

file. To use these variables, you must

include the

nidaqcns.h

file in the code. If you do not want to use these

variable definitions, you can examine the function call listings in the
NI-DAQ documentation and the

nidaqcns.h

file to determine what input

values are required.

Documentation

For information about NI-DAQ, refer to the following documentation:

NI-DAQ Function Reference Help

(

Start»Programs»National Instruments»NI-DAQ»NI-DAQ Help

)

NI-DAQ User Manual for PC Compatibles

at

ni.com/manuals

These two documents provide detailed information about using NI-DAQ.
The function reference help includes information on the functions in
NI-DAQ. The user manual provides instructions on installing and
configuring DAQ devices and detailed information on creating
applications that use NI-DAQ. These documents are the primary references
for writing the calibration utility. For further information on the device you
are calibrating, you may also want to install the device documentation.

Calibrating the NI 6711/6713/6731/6733

To calibrate the NI 6711/6713/6731/6733, complete the following steps:

1.

Verify the performance of the NI 6711/6713/6731/6733. This step,
which is described in the

Verifying the Performance of the

NI 6711/6713/6731/6733

section, confirms whether the device is in

specification prior to adjustment.

2.

Adjust the NI 6711/6713/6731/6733 calibration constants with respect
to a known voltage source. This step is described in the

Adjusting the

NI 6711/6713/6731/6733

section.

3.

Re-verify the performance to ensure that the NI 6711/6713/6731/6733
is operating within its specifications after adjustment.

Содержание NI 6731

Страница 1: ...ed for calibrating NI 6711 6713 6731 6733 devices Note Refer to ni com support calibrat mancal htm for a copy of the ni671xCal dll file What Is Calibration Calibration consists of verifying the measur...

Страница 2: ...en calibrated with respect to an external standard However external variables such as temperature can still affect measurements The new calibration constants are defined with respect to the calibratio...

Страница 3: ...imize connections and test conditions during calibration Keep connections to the NI 6711 6713 6731 6733 short Long cables and wires act as antennae picking up extra noise which can affect measurements...

Страница 4: ...w to configure the device in NI DAQ Refer to the NI 671X 673X User Manual for detailed installation instructions You can install this manual when you install NI DAQ 1 Power down the computer 2 Install...

Страница 5: ...DAQ User Manual for PC Compatibles at ni com manuals These two documents provide detailed information about using NI DAQ The function reference help includes information on the functions in NI DAQ Th...

Страница 6: ...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 set...

Страница 7: ...ifying the Performance of the Counter This procedure verifies the performance of the counter The NI 6711 6713 6731 6733 devices have only one timebase to verify so you only need to verify counter 0 Be...

Страница 8: ...nnot modify these values which provides a level of security that ensures users do not accidentally access or modify any calibration constants adjusted by the metrology laboratory This step in the cali...

Страница 9: ...om the device The device is now adjusted with respect to the external source After the device is adjusted you can verify the AO operation by repeating the Verifying Analog Output section Specification...

Страница 10: ...r the test point value should fall between the upper and lower limit values These limits are expressed in volts Counters Because you cannot adjust the resolution of the counter timers these values do...

Страница 11: ...Programs National Instruments NI DAQ NI DAQ Help and the NI DAQ User Manual for PC Compatibles at ni com manuals for additional information on the software structure Verifying Analog Output Figure 1 V...

Страница 12: ...CTR_Control deviceNumber 0 ND_RESET GPCTR_Set_Application deviceNumber 0 ND_PULSE_TRAIN_GNR GPCTR_Change_Parameter deviceNumber 0 ND_COUNT_1 2 GPCTR_Change_Parameter deviceNumber 0 ND_COUNT_2 2 Select...

Страница 13: ...djusting the NI 6711 6713 6731 6733 Figure 3 Adjusting the NI 6711 6713 6731 6733 Calibrate_E_Series deviceNumber ND_SELF_CALIBRATE ND_USER_EEPROM_AREA 0 Get_Cal_Date deviceNumber CalDate Calibrate_E_...

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