National Instruments SC Express PXIe-4309 Handbuch

CALIBRATION PROCEDURE

PXIe-4309

32 Ch (8 ADC), 2 MS/s, 18 - 28 bit, Flexible Resolution PXI Analog Input

Module

This document contains the verification and adjustment procedure for the PXIe-4309 module.

Note To maintain forced air cooling in the PXI Express system, refer to the

Maintain Forced-Air Cooling Note to Users.

Contents

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

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

Test Equipment......................................................................................................................... 3

Test Conditions......................................................................................................................... 4

Initial Setup............................................................................................................................... 4

Self Calibration................................................................................................................. 4

Verification ............................................................................................................................... 5

DC Offset Accuracy ......................................................................................................... 6

DC Voltage Accuracy....................................................................................................... 9

Adjustment................................................................................................................................ 13

EEPROM Update ..................................................................................................................... 16

Reverification ........................................................................................................................... 17

Specifications............................................................................................................................ 17

Worldwide Support and Services ............................................................................................. 17

Software

Calibrating the PXIe-4309 requires the installation of NI-DAQmx on the calibration system.

Driver support for calibrating the PXIe-4309 was first available in NI-DAQmx 17.1. 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-4309 (ST), TB-4309 (MT), or

CAL-4309.

2|ni.com |PXIe-4309 Calibration Procedure

Documentation

Consult the following documents for information about the PXIe-4309, NI-DAQmx, and your

application software. All documents are available on ni.com, and help files install with the

software.

PXIe-4309 and TB-4309 (ST)/TB-4309 (MT) Getting Started Guide and Terminal Block

Specifications

NI-DAQmx driver software installation and hardware setup.

PXIe-4309 User Manual

PXIe-4309 usage and reference information.

PXIe-4309 Specifications

PXIe-4309 specifications and calibration interval.

NI-DAQmx Readme

Operating system and application software support in NI-DAQmx.

NI-DAQmx Help

Information about creating applications that use the NI-DAQmx driver.

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.

PXIe-4309 Calibration Procedure |© National Instruments |3

Test Equipment

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

procedures of the PXIe-4309. If the recommended equipment is not available, select a substitute

using the requirements listed in Table 1.

Table 1. Recommended Equipment for PXIe-4309 Verification and Adjustment

Equipment Recommended Model Requirements

Calibrator Fluke 5700A Output Range:

±15 V, ±10 V, ±1 V and ±0.1 V

Accuracy:

10 ppm of output

(±15 V, ±10 V, ±1 V)

20 ppm of output

(±0.1 V)

Output Impedance: 50 Ω.

DMM PXI-4071 or PXIe-4081 DC Voltage

Input Range: 10 V

Accuracy:

12 ppm of reading,

0.5 ppm of range

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

another PXI Express chassis, such as

the PXIe-1082 or PXIe-1078.

Connection Accessory CAL-4309 For automated verification use the

CAL-4309.

For manual verification use the

TB-4309 (ST) or TB-4309 (MT).

When using these terminal blocks for

verification connect only one

channel to the calibrator at a time.

Low thermal EMF test lead kit Pomona Model 72928 Low thermal EMF banana-to-banana

and banana-to-probe test lead sets.

Low thermal EMF double

banana plug shorting bar

Pomona Model 5145 Low thermal EMF double banana

plug shorting bar.

4|ni.com |PXIe-4309 Calibration Procedure

Test Conditions

The following setup and environmental conditions are required to ensure the PXIe-4309 meets

published specifications.

• Keep connections to the PXIe-4309 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 terminal block are secure.

• Use shielded copper wire for all cable connections to the TB-4309. Use twisted-pair wire

to eliminate noise and thermal offsets.

• Maintain an ambient temperature of 23 °C ±5 °C. The PXIe-4309 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-4309 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 at ni.com/manuals.

• Allow adequate warm-up time for all of the instruments and equipment according to the

manufacturer instructions.

Initial Setup

Refer to the PXIe-4309 and TB-4309 (ST)/TB-4309 (MT) Getting Started 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.

Self Calibration

The PXIe-4309 includes a temperature controlled internal reference and self-calibration

circuitry used during self-calibration to adjust for drift over time and temperature.

Note No signal connections are needed for self-calibration.

Complete the following steps to self-calibrate the device.

1. Wait 15 minutes for the device to warm up.

2. Launch MAX.

PXIe-4309 Calibration Procedure |© National Instruments |5

3. Select My System»Devices and Interfaces, and then select the PXIe-4309 device to self

calibrate.

4. Right-click the device and select Self-Calibrate.

Note Once self-calibration is completed, maintain ambient temperature within

±1 °C of the self-calibration temperature.

Verification

The following procedures describe the sequence of operation and provide test points required to

verify the PXIe-4309. The verification procedures assume that adequate traceable uncertainties

are available for the calibration references.

Note The verification procedure requires performing a self-calibration as a first

step unless self-verification is done immediately after an adjustment. Refer to the Self

Calibration section for instructions on performing a self calibration.

Warranted specifications have As-Found Limits (V) for verification before adjustment and

As-Left Limits (V) for reverification after adjustment. Warranted specifications unaffected by

adjustment have test limits with no additional qualification.

Note If any test fails verification or reverification, confirm 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.

6|ni.com |PXIe-4309 Calibration Procedure

DC Offset Accuracy

Complete the following steps to verify the DC offset accuracy:

1. Short input channels 0 through 31. Depending on the terminal block used for verification,

refer to step a or b for specifics about how to short the input channels of the PXIe-4309.

a. CAL-4309. Connect the double banana plug shorting bar to the input of the CAL-4309

as shown in Figure 1. This connection shorts all 32 input channels of the PXIe-4309.

i. Attach the CAL-4309 terminal block to the PXIe-4309 module.

ii. Tighten the mounting screw at the top of the terminal block to secure the terminal

block to the module.

iii. Wait ten minutes for the thermal EMF to stabilize.

iv. Connect the double banana plug shorting bar to the input of the CAL-4309 as

shown in Figure 1.

v. Wait two minutes for the thermal EMF to stabilize.

Figure 1. PXIe-4309 DC Offset Verification Setup Using the CAL-4309

b. TB-4309 (ST). Use nickel plated copper wire to short channels 0 through 31 as shown

in Figure 2.

i. Loosen the top cover screws and remove the top cover.

ii. Use nickel plated copper wire to short channels 0 through 31 as shown in

Figure 2.

iii. Reinstall the top cover and tighten the top cover screws.

iv. Attach the TB-4309 (ST) terminal block to the PXIe-4309 module.

v. Tighten the mounting screw at the top of the terminal block to secure the terminal

block to the module.

vi. Wait ten minutes for the thermal EMF to stabilize.

INTERNAL

REFERENCE

INPUT

CAL-4309 PXIe-4309

PXIe-4309 Calibration Procedure |© National Instruments |7

Figure 2. PXIe-4309 DC Offset Verification Setup Using the TB-4309 (ST)

2. Verify the accuracy for each specified configuration in Table 2.

a. Configure an AI voltage channel task using the values in Table 3.

b. Start the task.

c. Acquire the samples with the PXIe-4309.

d. Drop the first sample acquired for each channel.

e. Average the remaining samples on a per channel basis.

f. Stop and clear the task.

g. Compare the averaged values to the specified test limits in Table 2.

1 TB-4309 (ST) Terminal Block 2AlnInput Short

RFOR PATENTS: NI.COM/PATENTS

TB–4309

J12

AI28–

AI28+

AI12–

AI12+

AI20–

AI20+

AI4–

AI4+

AI29–

AI29+

AI13–

AI13+

AI21–

AI21+

AI5–

AI5+

J5 J6 J7 J8

J1 J2 J3 J4

AI24–

AI24+

AI8–

AI8+

AI16–

AI16+

AI0–

AI0+

AI25–

AI25+

AI9–

AI9+

AI17–

AI17+

AI1–

AI1+

AI30–

AI30+

AI14–

AI14+

AI22–

AI22+

AI6–

AI6+

AI31–

AI31+

AI15–

AI15+

AI23–

AI23+

AI7–

AI7+

AI26–

AI26+

AI10–

AI10+

AI18–

AI18+

AI2–

AI2+

AI27–

AI27+

AI11–

AI11+

AI19–

AI19+

AI3–

AI3+

REF–REF+

J10 J11

PFI0

PFI_GND

PFI1

FRONT

UL94V–0

CR1

CR2

U2 U3

8|ni.com |PXIe-4309 Calibration Procedure

Table 2. DC Offset Verification Test Limits

PXIe-4309 Configuration Test Limits (μV)

Channels

Input

Range Auto Zero Chopping Lower Upper

AI0..31*

±0.1 V

None** Disabled

-6 6

±1.0 V -10 10

±10 V -100 100

±15 V -150 150

AI0..31*

±0.1 V

Once Disabled

-5 5

±1.0 V

±10 V -50 50

±15 V -75 75

AI0..31*

±0.1 V

Every Sample Disabled -4 4

±1.0 V

±10 V

±15 V

AI0..15†

±0.1 V

None Enabled -2 2

±1.0 V

±10 V

±15 V

*Verification of channels 0 through 31 provides coverages of each of the 32 independent input paths of

the PXIe-4309.

**Auto Zero None Test Limits include residual offset + temperature coefficient for ±1.0 °C.

†Verification of channels 0 through 15 provides coverage of each of the 16 independent matching

chopping pairs of the PXIe-4309.

PXIe-4309 Calibration Procedure |© National Instruments |9

DC Voltage Accuracy

Complete the following steps to verify the DC voltage accuracy:

1. Connect the calibrator output to the input channel being tested. Depending on the terminal

block used for verification, refer to step a or b for specifics about how to connect the

calibrator output to the PXIe-4309 input.

Note Keep the test lead set loop area as small as possible.

a. CAL-4309. Use a low thermal EMF banana-to-banana test lead set to connect the

input of the CAL-4309 to the calibrator output as shown in Figure 3. This connects all

32 input channels of the PXIe-4309 to the calibrator output.

i. Attach the CAL-4309 terminal block to the PXIe-4309 module.

ii. Tighten the mounting screw at the top of the terminal block to secure the terminal

block to the module.

iii. Wait ten minutes for the thermal EMF to stabilize.

iv. Use a low thermal EMF banana-to-banana test lead set to connect the input of the

CAL-4309 to the calibrator output as shown in Figure 3.

v. Wait two minutes for the thermal EMF to stabilize.

Table 3. AI Setup for DC Voltage Verification

Configuration Value

Physical Channels dev1/aix, where xrefers to the channel number.

Input Range Input range from Table 2.

Input Terminal Configuration Differential

Rate 10 S/s

Sample Mode Finite

Samples per Channel 11

Auto Zero Auto Zero configuration from Table 2.

Chopping Chopping configuration from Table 2.

10 |ni.com |PXIe-4309 Calibration Procedure

Figure 3. PXIe-4309 DC Voltage Verification Setup Using CAL-4309.

b. TB-4309 (ST). Attach eight individual twisted-pair nickel-plated copper wires to

terminals AI0 through AI7 to allow the connection of the PXIe-4309 inputs to the

calibrator, one channel at a time.

i. Loosen the top cover screws and remove the top cover.

ii. Attach eight individual twisted-pair nickel-plated copper wires to AI0 through

AI7 to allow the connection of the PXIe-4309 inputs to the calibrator, one

channel at a time.

iii. Reinstall the top cover and tighten the top cover screws.

iv. Attach the TB-4309 (ST) terminal block to the PXIe-4309 module.

v. Tighten the mounting screw at the top of the terminal block to secure the terminal

block to the module.

vi. Wait ten minutes for the thermal EMF to stabilize.

CAL-4309

Calibration TB

OUTPUT

SENSE

AUX

CURRENT

V-GUARD GROUND

INTERNAL

REFERENCE

INPUT

For Calibration of

PXIe-4309 Only

30 VDC

CAL-4309

INPUT

Calibrator

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