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+

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

372092C-01 Nov15

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FAR 52.227-14, DFAR 252.227-7014, and DFAR 252.227-7015.

Worldwide Support and Services

The NI website is your complete resource for technical support. At ni.com/support you have

access to everything from troubleshooting and application development self-help resources to

email and phone assistance from NI Application Engineers.

Visit ni.com/services for NI Factory Installation Services, repairs, extended warranty, and

other services.

Visit ni.com/register to register your NI product. Product registration facilitates technical

support and ensures that you receive important information updates from NI.

A Declaration of Conformity (DoC) is our claim of compliance with the Council of the European

Communities using the manufacturer’s declaration of conformity. This system affords the user

protection for electromagnetic compatibility (EMC) and product safety. You can obtain the DoC

for your product by visiting ni.com/certification. If your product supports calibration,

you can obtain the calibration certificate for your product at ni.com/calibration.

NI corporate headquarters is located at 11500 North Mopac Expressway, Austin, Texas,

78759-3504. NI also has offices located around the world. For telephone support in the United

States, create your service request at ni.com/support or dial 1 866 ASK MYNI (275 6964).

For telephone support outside the United States, visit the Worldwide Offices section of

ni.com/niglobal to access the branch office websites, which provide up-to-date contact

information, support phone numbers, email addresses, and current events.

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