National Instruments PXIe-4302 Manuale

CALIBRATION PROCEDURE

PXIe-4302/4303 and TB-4302C

32 Ch, 24-bit, 5 kS/s or 51.2 kS/s Simultaneous Filtered Data

Acquisition Module

This document contains the verification and adjustment procedure for the National Instruments

PXIe-4302/4303 module and the verification procedure for the National Instruments TB-4302C

terminal block.

Contents

Software.................................................................................................................................... 1

Documentation.......................................................................................................................... 2

PXIe-4302/4303 Verification and Adjustment......................................................................... 2

Test Equipment................................................................................................................. 2

Connecting the TB-4302 .......................................................................................... 3

Test Conditions.................................................................................................................5

Initial Setup....................................................................................................................... 5

Accuracy Verification....................................................................................................... 5

Adjustment........................................................................................................................ 8

EEPROM Update ............................................................................................................. 9

Reverification ................................................................................................................... 10

TB-4302C Verification............................................................................................................. 10

Test Equipment................................................................................................................. 10

Accuracy Verification....................................................................................................... 11

Specifications............................................................................................................................ 14

Revision History ....................................................................................................................... 14

NI Services ............................................................................................................................... 14

Software

Calibrating the PXIe-4302/4303 requires you to install the following package on the calibration

system.

• NI-DAQmx 15.1 or later

For the list of devices supported by a specific release, refer to the NI-DAQmx Readme, available

on the version-specific download page or installation media.

You can download NI-DAQmx from ni.com/downloads. NI-DAQmx supports LabVIEW,

LabWindows™/CVI™, C/C++, C#, and Visual Basic .NET. When you install NI-DAQmx, you

only need to install support for the application software that you intend to use.

No other software is required to verify the operation of the TB-4302C.

2|ni.com |PXIe-4302/4303 and TB-4302C Calibration Procedure

Documentation

You might find the following documents helpful as you perform the calibration procedure.

• NI PXIe-4302/4303 and TB-4302/4302C User Guide and Terminal Block Specifications

• NI PXIe-4302/4303 User Manual

• NI PXIe-4302/4303 Specifications

• NI-DAQmx Readme

• NI-DAQmx Help

•LabVIEWHelp

• NI-DAQmx C Reference Help

• NI-DAQmx .NET Help Support for Visual Studio

PXIe-4302/4303 Verification and Adjustment

This section provides information for verifying and adjusting the PXIe-4302/4303.

Test Equipment

Table 1 lists the equipment recommended for the performance verification and adjustment

procedures of the PXIe-4302/4303. If the recommended equipment is not available, select a

substitute using the requirements listed in Table 1.

Table 1. Recommended Equipment for PXIe-4302/4303 Verification

and Adjustment

Equipment Recommended Model Requirements

DMM PXI-4071 Use a DMM that has an

accuracy of 13 ppm or better

when measuring the 10 V

range, an accuracy of

30 ppm or better when

measuring the 100 mV

range, and an offset error of

0.8 V or better at 0 V.

PXI Express Chassis PXIe-1062Q If this chassis is unavailable,

use another PXI Express

chassis, such as the

PXIe-1082 or PXIe-1078.

PXIe-4302/4303 and TB-4302C Calibration Procedure |© National Instruments Corporation |3

Connecting the TB-4302

The TB-4302 provides connections for the PXIe-4302/4303. Figure 1 shows the pin assignments

of the TB-4302.

Figure 1. TB-4302 Circuit Board Parts Locator Diagram

Each channel consists of two terminal connections specific to that channel as shown in Table 2.

You can verify or adjust the accuracy for any or all channels depending on the desired test

coverage. Refer to Figure 2 and only connect the input channels required for verification or

adjustment in parallel.

Refer to Table 2 for the analog signal names of the TB-4302.

Connection Accessory TB-4302 —

SMU PXIe-4139 Noise (0.1 Hz to 10 Hz, peak

to peak) is 60 V or better at

10 V.

Noise (0.1 Hz to 10 Hz, peak

to peak) is 2 V or better at

100 mV.

Table 1. Recommended Equipment for PXIe-4302/4303 Verification

and Adjustment (Continued)

Equipment Recommended Model Requirements

AI3-

AI3+

AI2+

AI4+

AI4-

AI5-

AI7-

AI7+

AI6-

AI6+

AI5+

AI0+

AI0-

AI1-

AI2+

AI1+

AI9+

AI9-

AI10+

AI13+

AI13-

AI14+

AI15+

AI15-

AI14-

AI12+

AI11+

AI10-

AI8+

AI11-

AI8-

AI12-

AI7+

AI7-

AI18+

AI21+

AI21-

AI22+

AI23+

AI23-

AI22-

AI20+

AI19+

AI18-

AI6+

AI19-

AI6-

AI20-

AI5+

AI5-

AI16+

AI29+

AI29-

AI30+

AI31+

AI31-

AI30-

AI28+

AI17+

AI16-

AI4+

AI17-

AI4-

AI28-

FOR PATENTS: NI.COM/PATENTS

NI TB-4302

S/N

158016B-01L

UL94V-0

AIGND AIGND

J21J4188

J6 J8

J10 J121818

8181

CR3

AIGND AIGND

J15

J17

J11 J13 J18

J16J14

8181

R5 R6 R4

CR1

CR2

PFI0

DGND

4|ni.com |PXIe-4302/4303 and TB-4302C Calibration Procedure

Complete the following steps to connect the TB-4302.

1. Install the PXIe-4302/4303 and the TB-4302 in the PXI Express chassis according to the

instructions in the NI PXIe-4302/4303 and TB-4302/4302C User Guide and Terminal

Block Specifications.

2. Configure the PXIe-4139 to voltage output mode and enable remote sensing. Connect the

PXIe-4139 output to the TB-4302 as shown in Figure 2.

3. Use two 10 kresistors with 1% or better tolerance to build a voltage divider to bias the

PXIe-4139 output and set the common-mode input of the PXIe-4302/4303 to zero volts.

Connect one resistor between AI+ and AIGND and the other between AI- and AIGND as

shown in Figure 2.

4. Connect the PXI-4071 to measure the differential voltage across the TB-4302 AI+ and AI-

terminals. A detailed wiring diagram is shown in Figure 2.

Figure 2. Connecting the TB-4302

Table 2. TB-4302 Analog Signal Names

Signal Name Signal Description

AI+ Positive input voltage terminal

AI- Negative input voltage terminal

AIGND Analog ground input

4071

4139

SENSE HI

SENSE LO

AI0+

AI0–

AI1+

AI1–

AI31+

AI31–

10 k

TB-4302

PXIe-4302/4303 and TB-4302C Calibration Procedure |© National Instruments Corporation |5

Test Conditions

The following setup and environmental conditions are required to ensure the PXIe-4302/4303

meets published specifications.

• Keep connections to the PXIe-4302/4303 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 TB-4302 are secure.

• Use shielded copper wire for all cable connections to the TB-4302. Use twisted-pair wire

to eliminate noise and thermal offsets.

• Maintain an ambient temperature of 23 °C ±5 °C. The PXIe-4302/4303 temperature will be

greater than the ambient temperature.

• Keep relative humidity below 80%.

• Allow a warm-up time of at least 15 minutes to ensure that the PXIe-4302/4303

measurement circuitry is at a stable operating temperature.

• Ensure that the PXI/PXI Express chassis fan speed is set to HIGH, that the fan filters are

clean, and that the empty slots contain filler panels. For more information, refer to the

Maintain Forced-Air Cooling Note to Users document available on ni.com.

Initial Setup

Refer to the NI PXIe-4302/4303 and TB-4302/4302C Installation Guide and Terminal Block

Specifications for information about how to install the software and hardware and how to

configure the device in Measurement & Automation Explorer (MAX).

Note When a device is configured in MAX, it is assigned a device identifier. Each

function call uses this identifier to determine which DAQ device to verify or to verify

and adjust. This document uses Dev1 to refer to the device name. In the following

procedures, use the device name as it appears in MAX.

Accuracy Verification

The following performance verification procedures describe the sequence of operations and

provides the test points required to verify the PXIe-4302/4303. The verification procedures

assume that adequate traceable uncertainties are available for the calibration references.

The PXIe-4302/4303 has 32 independent analog input channels. The input range of each channel

can be set to 10 V or 100 mV. You can verify the accuracy of either range for all of the channels

depending upon your desired test coverage.

Complete the following steps to verify the voltage mode accuracy of the PXIe-4302/4303.

1. Set the PXIe-4139 voltage output to zero volts.

2. Connect the PXIe-4139 and PXI-4071 to the TB-4302 as shown in Figure 2.

3. Use Table 3 to configure the PXIe-4139 to output a Test Point value for the appropriate

range shown in Table 6, beginning with the values in the first row.

6|ni.com |PXIe-4302/4303 and TB-4302C Calibration Procedure

4. Refer to Table 4 to configure the PXI-4071 and acquire a voltage measurement.

5. Acquire a voltage measurement with the PXIe-4302/4303.

a. Create a DAQmx task.

b. Create and configure the AI channel according to the values shown in Table 5.

Table 3. PXIe-4139 Voltage Output Setup

Configuration Value

Function Voltage output

Sense Remote

Range 600 mV range for test points less than 100 mV

60 V range for all other test points

Current Limit 20 mA

Current Limit Range 200 mA

Table 4. PXI-4071 Voltage Measurement Setup

Configuration Value

Function DC measurement

Range 1 V range for test points less than 100 mV.

10 V range for all other test points.

Digital Resolution 7.5 digits

Aperture Time 100 ms

Autozero On

ADC Calibration On

Input Impedance > 10 G

DC Noise Rejection High Order

Number of Averages 1

Power Line Frequency Dependent upon the local power line characteristics.

PXIe-4302/4303 and TB-4302C Calibration Procedure |© National Instruments Corporation |7

c. Start the task.

d. Average the readings that you acquired.

e. Clear the task.

f. Compare the resulting average to the Lower Limit and Upper Limit values in Table 6.

If the result is between these values, the device passes the test.

6. For each value in Table 6, repeat steps 3 through 5 for all channels.

7. Set the PXIe-4139 output to be zero volts.

8. Disconnect the PXIe-4139 and PXI-4071 from the TB-4302.

Table 5. AI Voltage Mode Setup

Configuration Value

Channel Name Dev1/ai0:32

Task AI voltage

Sample Mode Finite samples

Sample Clock Rate 5000

Samples per Channel 5000

Maximum Value Appropriate maximum range value from Table 6

Minimum Value Appropriate minimum range value from Table 6

Units Vo l t s

Table 6. Voltage Measurement Accuracy Limits

Range (V)

Test

Point (V) Lower Limit (V) Upper Limit (V)Minimum

Maximu

-0.1 0.1 -0.095 DMM Reading - 0.00007 V DMM Reading + 0.00007 V

-0.1 0.1 0DMM Reading - 0.000029 V DMM Reading + 0.000029 V

-0.1 0.1 0.095 DMM Reading - 0.00007 V DMM Reading + 0.00007 V

-10 10 -9.5 DMM Reading - 0.004207 V DMM Reading + 0.004207 V

-10 10 0DMM Reading - 0.001262 V DMM Reading + 0.001262 V

-10 10 9.5 DMM Reading - 0.004207 V DMM Reading + 0.004207 V

8|ni.com |PXIe-4302/4303 and TB-4302C Calibration Procedure

Adjustment

The following performance adjustment procedure describes the sequence of operations required

to adjust the PXIe-4302/4203.

Complete the following steps to adjust the accuracy of the PXIe-4302/4203.

1. Set the PXIe-4139 output to be zero volts.

2. Connect the PXIe-4139 and PXI-4071 to the TB-4302 as shown in Figure 2.

3. Call the DAQmx Initialize External Calibration function with the following parameters:

Device In: Dev1

Password: NI1

4. Call the 4302/4303 instance of the DAQmx Setup SC Express Calibration function with the

following parameters:

calhandle in: calhandle output from DAQmx Initialize External Calibration

rangeMax: Appropriate Range Max starting with the value in the first row of Table 7

rangeMin: Appropriate Range Min starting with the value in the first row of Table 7

physical channels: dev1/ai0:31

1 The default password is NI, which can be changed. Refer to the NI-DAQmx Help for details.

Table 7. Voltage Mode Adjustment Test Points

Range (V)

Test Points (V)Max Min

0.1 -0.1 -0.09

-0.06

-0.03

0.03

0.06

0.09

PXIe-4302/4303 and TB-4302C Calibration Procedure |© National Instruments Corporation |9

5. Refer to Table 3 to configure the PXIe-4139. Set the PXIe-4139 output equal to the first

Test Point for the corresponding range in Table 7 that was configured in step 4.

6. Enable the PXIe-4139 output.

7. Refer to Table 4 to configure the PXI-4071 and acquire a voltage measurement.

8. Call the 4302/4303 instance of the DAQmx Adjust SC Express Calibration function with

the following parameters:

calhandle in: calhandle output from DAQmx Initialize External Calibration reference

voltage: DMM measurement value from step 7

9. Repeat steps 5 through 8 for the remaining Test Point values from Table 7 for the

corresponding range that was configured in step 4.

10. Repeat steps 4 through 9 for the remaining ranges from Table 7.

11. Call the 4302/4303 instance of the DAQmx Adjust SC Express Calibration function with

the following parameters:

calhandle in: calhandle output from DAQmx Adjust SC Express Calibration

action: commit

EEPROM Update

When an adjustment procedure is completed, the PXIe-4302/4303 internal calibration memory

(EEPROM) is immediately updated.

If you do not want to perform an adjustment, you can update the calibration date without making

any adjustments by initializing an external calibration and closing the external calibration.

10 -10 -9

-6

-3

Table 7. Voltage Mode Adjustment Test Points (Continued)

Range (V)

Test Points (V)Max Min

10 |ni.com |PXIe-4302/4303 and TB-4302C Calibration Procedure

Reverification

Repeat the Accuracy 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 NI Services

for assistance in returning the device to NI.

TB-4302C Verification

This section provides information for verifying the performance of the TB-4302C.

Test Equipment

Table 8 lists the equipment recommended for verifying the shunt value of the TB-4302C. If the

recommended equipment is not available, select a substitute using the requirements listed in

Table 8.

Table 8. Recommended Equipment for PXIe-4302/4303 Verification and Adjustment

Equipment Recommended Model Requirements

DMM PXI-4071 Use a DMM with an

accuracy of 136 ppm or

better when measuring 5 Ω

in 4-wire mode.

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