National Instruments NI 9263 Manual

CALIBRATION PROCEDURE
NI 9263
4-Channel, ±10 V, 16-Bit Analog Voltage Output Module
This document contains the verification and adjustment procedures for the National Instruments
9263. For more information on calibration solutions, visit ni.com/calibration.
Contents
Software.................................................................................................................................... 1
Documentation.......................................................................................................................... 2
Test Equipment......................................................................................................................... 3
Test Conditions......................................................................................................................... 3
Initial Setup............................................................................................................................... 3
Verification ............................................................................................................................... 4
Accuracy Verification....................................................................................................... 4
Adjustment................................................................................................................................ 6
Accuracy Adjustment ....................................................................................................... 6
EEPROM Update ..................................................................................................................... 6
Reverification ........................................................................................................................... 7
Accuracy Under Calibration Conditions .................................................................................. 7
Worldwide Support and Services ............................................................................................. 8
Software
Calibrating the NI 9263 requires the installation of NI-DAQmx 9.6 or later on the calibration
system. You can download NI-DAQmx from ni.com/downloads NI-DAQmx supports
LabVIEW, LabWindows™/CVI™, ANSI C, and .NET. When you install NI-DAQmx, you only
need to install support for the application software that you intend to use.

2|ni.com |NI 9263 Calibration Procedure
Documentation
Consult the following documents for information about the NI 9263, NI-DAQmx, and your
application software. All documents are available on ni.com and help files install with the
software.
NI cDAQ-9174/9178 USB Chassis Quick Start
NI-DAQmx installation and hardware setup
NI 9263 Operating Instructions and Specifications
NI 9263 specific information, specifications, and calibration interval
NI-DAQmx Readme
Operating system and application software support in NI-DAQmx
LabVIEW Help
LabVIEW programming concepts and reference information about NI-DAQmx
VIs and functions
NI-DAQmx C Reference Help
Reference information for NI-DAQmx C functions and NI-DAQmx C properties
NI-DAQmx .NET Help Support for Visual Studio
Reference information for NI-DAQmx .NET methods and NI-DAQmx .NET
properties, key concepts, and a C enum to .NET enum mapping table

NI 9263 Calibration Procedure |© National Instruments |3
Test Equipment
National Instruments recommends that you use equipment in Table 1 for calibrating the
NI 9263. If the recommended equipment is not available, select a substitute using the
requirements listed in Table 1.
Test Conditions
The following setup and environmental conditions are required to ensure the NI 9263 meets
published specifications.
• Keep connections to the NI 9263 as short as possible. Long cables and wires act as
antennas, picking up extra noise that can affect measurements.
• Verify that all connections to the NI 9263 are secure.
• Use shielded copper wire for all cable connections to the NI 9263. Use twisted-pair wire to
eliminate noise and thermal offsets.
• Maintain an ambient temperature of 23 ± 5 °C. The NI 9263 board temperature will be
greater than the ambient temperature.
• Keep relative humidity below 80%.
• Allow a warm-up time of at least 10 minutes to ensure that the NI 9263 measurement
circuitry is at a stable operating temperature.
Initial Setup
Complete the following steps to set up the NI 9263.
1. Install NI-DAQmx.
2. Make sure that the NI cDAQ-9178 power source is not connected.
3. Insert the module into slot 8 of the NI cDAQ-9178 chassis. Leave slots 1 through 7 of the
NI cDAQ-9178 chassis empty.
4. Connect the NI cDAQ-9178 chassis to your host computer.
5. Connect the power source to the NI cDAQ-9178 chassis.
6. Launch Measurement & Automation Explorer (MAX).
7. Right-click the device name and select Self-Test to ensure that the device is working properly.
Table 1. Recommended Equipment
Equipment Recommended Model Requirements
DMM NI 4070 DMM Use a multiranging 6 1/2 digit
DMM with voltage measurement
accuracy of ±40 ppm.
Chassis NI cDAQ-9178 —
Connection Accessory NI 9932 —

4|ni.com |NI 9263 Calibration Procedure
Verification
The following performance verification procedure describes the sequence of operation and
provides test points required to verify the NI 9263. The verification procedure assumes that
adequate traceable uncertainties are available for the calibration references.
Accuracy Verification
Complete the following procedure to determine the As-Found status of the NI 9263.
1. Set the DMM to Standby mode (STBY).
2. Connect the DMM to the NI 9263 as shown in Figure 1.
Figure 1. Accuracy Verification Connections
3. Set the DMM to read DC voltage in the minimum range required to cover the NI 9263
output range of ±10 V.
4. Acquire a sample
a. Create and configure an AO voltage channel according to Table 2.
b. Start the task.
c. Generate a voltage output according to Table 3.
d. Wait the appropriate time for the DMM measurement to settle.
e. Read the NI 9263 output voltage measurement from the DMM.
f. Clear the task.
Table 2. NI 9263 AO Voltage Channel Configuration
Input Range
Scaled Units Terminal ConfigurationMin Max
-10 10 Vo l t s Single Ended
Table 3. NI 9263 Output Configuration
Samples Per
Channel Timeout Data
110.0 A Test Point value indicated in Table 4 or Table 5.
NI 9263DMM
AOx–
AOx+
HI
LO

NI 9263 Calibration Procedure |© National Instruments |5
5. Compare the DMM measurement to the test limits in Table 4.
6. Repeat steps 3 through 5 for each test point in Table 4.
7. Disconnect the DMM from the NI 9263.
8. Repeat steps 1 through 7 for each channel on the NI 9263.
Note The accuracy and test limits of the NI 9263 vary depending on which revision
of the module you are using. If the module was purchased after 2007 use the
Revision E limits. If the module was purchased before 2007 then use the Revision D
limits.
Note Test limits in Table 4 are derived using the values in Table 7.
Table 4. NI 9263 Revision D Test Limits
Range (V) Test Point 1-Year Limits
Min Max Location Value (V)
Lower
Limit (V)
Upper
Limit (V)
-10.000 10.000 Max 9.500000 9.460540 9.539460
-10.000 10.000 Mid 0.000000 -0.029960 0.029960
-10.000 10.000 Min -9.500000 -9.539460 -9.460540
Table 5. NI 9263 Revision E Analog Test Limits
Range (V) Test Point 1-Year Limits
Min Max Location Value (V)
Lower
Limit (V)
Upper
Limit (V)
-10.000 10.000 Max 9.500000 9.482770 9.517230
-10.000 10.000 Mid 0.000000 -0.009630 0.009630
-10.000 10.000 Min -9.500000 -9.517230 -9.482770

6|ni.com |NI 9263 Calibration Procedure
Adjustment
The following performance adjustment procedure describes the sequence of operation required
to adjust the NI 9263.
Accuracy Adjustment
Complete the following procedure to adjust the accuracy performance of the NI 9263.
1. Connect the DMM to the NI 9263 as shown in Figure 1.
2. Adjust the NI 9263.
a. Initialize a calibration session on the NI 9263. The default password is NI.
b. Input the external temperature in degrees Celsius.
c. Call the NI 9263 get C Series adjustment points function to obtain an array of
recommended calibration voltages for the NI 9263.
d. Set the DMM to read DC voltage in the minimum range required to cover the NI 9263
output range of ±10 V.
e. Call and configure the NI 9263 setup calibration function with the DAC value
obtained from the array of recommended calibration voltages.
f. Wait the appropriate amount of time for the DMM measurement to settle.
g. Read the NI 9263 output voltage measurement from the DMM.
h. Call and configure the NI 9263 adjustment function according to Table 6.
i. Repeat steps e to h for each calibration voltage in the array.
j. Close the calibration session.
3. Disconnect the DMM from the NI 9263.
4. Repeat step 1 for each channel on the NI 9263.
EEPROM Update
When an adjustment procedure is completed, the NI 9263 internal calibration memory
(EEPROM) is immediately updated.
If you do not want to perform an adjustment, you can update the calibration date and onboard
calibration temperature without making any adjustments by initializing an external calibration,
setting the C Series calibration temperature, and closing the external calibration.
Table 6. Adjustment Configuration
Physical Channel Reference Value
cDAQMod8/aoxThe NI 9263 output voltage measured from the DMM.

NI 9263 Calibration Procedure |© National Instruments |7
Reverification
Repeat the Verification section to determine the As-Left status of the device.
Note If any test fails Reverification after performing an adjustment, verify that you
have met the Test Conditions before returning your device to NI. Refer to Worldwide
Support and Services for assistance in returning the device to NI.
Accuracy Under Calibration Conditions
The values in the following table are based on calibrated scaling coefficients, which are stored
in the onboard EEPROM.
The following accuracy table is valid for calibration under the following conditions:
• Ambient temperature 23 °C ± 5 °C
• NI 9263 installed in slot 8 of an NI cDAQ-9178 chassis
• Slots 1 through 7 of the NI cDAQ-9178 chassis are empty
Table 7. NI 9263 Accuracy
Device
Percent of Reading
(Gain Error)
Percent of Range*
(Offset Error)
NI 9263 Revision D 0.10% 0.28%
NI 9263 Revision E 0.08% 0.09%
* Range equals 10.7 V

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372092C-01 Nov15
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