National Instruments NI TB-4300B Manual

CALIBRATION PROCEDURE

NI TB-4300B

This document contains information about verifying National Instruments TB-4300B terminal

blocks. For more information about calibration, visit ni.com/calibration.

Contents

Software Requirements............................................................................................................. 1

Documentation Requirements .................................................................................................. 1

Calibration Interval................................................................................................................... 1

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

Test Conditions......................................................................................................................... 2

Verification Procedure.............................................................................................................. 3

Where to Go for Support .......................................................................................................... 8

Software Requirements

No other software is required to verify the operation of the TB-4300B. All of the information

necessary to verify this terminal block is located in this calibration procedure.

Documentation Requirements

You may find the following document useful for reference. You can download the latest version

of this document from the NI Web site at ni.com/manuals.

• The NI SC Express 4300 Installation Guide and Terminal Block Specifications provides

instructions for installing and configuring the NI PXIe-4300 module and TB-4300/4300B

and includes terminal block specifications.

Calibration Interval

National Instruments recommends a calibration interval of five years for the TB-4300B. Verify

at the recommended interval based on the measurement accuracy demands of your application.

2|ni.com |NI TB-4300B Calibration Procedure

Test Equipment

National Instruments recommends that you use the instruments in Table 1 for adjusting and

verifying a TB-4300B.

Test Conditions

The following setup and environmental conditions are required to ensure the terminal block

meets published specifications.

• Keep connections to the device as short as possible. Long cables and wires can act as

antennae, which can pick up extra noise that affects measurements.

• Verify that all connections to the device are secure.

• Maintain the ambient temperature between 20 °C and 30 °C.

• Keep relative humidity below 80%.

• Allow at least 15 minutes warm-up time to ensure that the measurement circuitry is at a

stable operating temperature.

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

eliminate noise and thermal offsets.

Table 1. Recommended Equipment

Equipment

Recommended

Model Requirements

Calibrator Fluke 5700A If this instrument is unavailable, use a

high-precision voltage source with an accuracy of at

least 10 ppm for adjustment and at least 40 ppm for

verification. The source needs an output impedance

of less than or equal to 50 Ω.

DMM NI 4070 If this instrument is unavailable, use a multiranging

6½ digit DMM with an accuracy of at least 40 ppm

and an input impedance of >10 GΩ.

Connection

Accessory

CAL-4300B Fixture required for verification of the TB-4300B.

NI TB-4300B Calibration Procedure |© National Instruments |3

Verification Procedure

Complete the following steps to verify the attenuation ratio of the TB-4300B:

1. Loosen the top cover captive screws and remove the top cover while referring to Figure 1.

2. Remove the strain relief screws and the strain relief.

Figure 1. TB-4300B/CAL-4300B Assembly

Caution Make sure the TB-4300B has three keys installed in its connector and that

none of the keys are loose. The keying locations are shown in Figure 2. If any of the

three keys are missing or loose, refer to the Where to Go for Support section for

assistance in returning the terminal block to NI.

1 Top Cover Captive Screws

2TopCover

3 Strain Relief Screws

4 Strain Relief

5 TB-4300B

6 CAL-4300B

4|ni.com |NI TB-4300B Calibration Procedure

Figure 2. TB-4300B Connector Key Locations

3. Connect the TB-4300B to the CAL-4300B by aligning the connectors and pressing them

together until they are seated.

1 Key Locations

NI TB-4300B Calibration Procedure |© National Instruments |5

4. Connect the calibrator to the TB-4300B as shown in Figure 3.

5. Replace and secure the strain relief and top cover.

Figure 3. TB-4300B Verification Input Measurement Wiring Diagram

6. Set the calibrator to 60 V. Refer to Table 2 for Lower and Upper Limits.

7. After enabling the calibrator, allow the TB-4300B to warm up for a minimum of

15 minutes.

1 CAL-4300B

2 TB-4300B

3 To Calibrator +

4 To Calibrator –

AI2+

AI2–

COM2

AI3+

AI3–

COM3

AI0+

AI0–

COM0

AI1+

AI1–

COM1

AI4+

AI4–

COM4

AI5+

AI5–

COM5

AI6+

AI6–

COM6

AI7+

AI7–

COM7

PFI0

PFI1

RP1

RP2

R2R1

R4R3R4R3

R6R5

R8R7

RP3R10R9

R12R11

RP4R14R13

R16R15

RP5

R18R17

R20R19

RP6

RP7R26R25

R28

R27

RP8R30R29

R32R3R31

R22R21

R24

R23

FOR PATENTS: NI.COM/PATENTS

N114

6|ni.com |NI TB-4300B Calibration Procedure

8. Connect the DMM to the output of AI0 on the CAL-4300B as shown in Figure 4. The

output voltage will be 1/30 of the input voltage; therefore, you must change the DMM range

accordingly.

Figure 4. TB-4300B Verification Output Measurement Wiring Diagram

1 To DMM –

2 To DMM +

3 CAL-4300B

4 TB-4300B

5 To Calibrator +

6 To Calibrator –

AI2+

AI2–

COM2

AI3+

AI3–

COM3

AI0+

AI0–

COM0

AI1+

AI1–

COM1

AI4+

AI4–

COM4

AI5+

AI5–

COM5

AI6+

AI6–

COM6

AI7+

AI7–

COM7

PFI0

PFI1

RP1

RP2

R2R1

R4R3R4R3

R6R5

R8R7

RP3R10R9

R12R11

RP4R14R13

R16R15

RP5

R18R17

R20R19

RP6

RP7R26R25

R28

R27

RP8R30R29

R32R3R31

R22R21

R24

R23

F O R PAT E N T S: NI.COM/PATENTS

N114

NI TB-4300B Calibration Procedure |© National Instruments |7

Note If using an NI DMM or a DMM with a selectable impedance, set the input

impedance to >10 GΩ.

9. Measure the voltage output on the CAL-4300B using the DMM. Use Table 2 to verify that

the channel is within the limits.

If the temperature is outside those found in Table 2, you can calculate the lower and upper

limits as follows:

where Vin is the input voltage of 60 V.

Δt is the absolute temperature difference between the ambient temperature

and 25 °C.

10. Disconnect the DMM and connect it to the next channel.

11. Repeat steps 9 through 10 for all channels.

If the verification procedure determines that the TB-4300B is outside of the specifications, refer

to Where to Go for Support for assistance in returning the terminal block to NI.

Table 2. TB-4300B Test Limits

Voltage Lower Limit (V) Upper Limit (V)

60 1.998646 2.000689

Note: These limits assume the ambient temperature is between 20 °C and 30 °C and that the input

voltages are exactly as stated. If this is not the case, refer to the following text to calculate the limits. The

values were derived from information available in the NI PXIe-4300 and TB-4300B Installation Guide

and Terminal Block Specifications document.

LowerLimit

Vin

30.019601 0.000146Δt+

------------------------------------------------------------=

UpperLimit

Vin

29.990401 0.000146Δt–

------------------------------------------------------------=

373549B-01 Aug12

LabVIEW, National Instruments, NI, ni.com, the National Instruments corporate logo, and the Eagle logo are trademarks of National Instruments

Corporation. Refer to the Trademark Information at ni.com/trademarks for other National Instruments trademarks. Other product and

company names mentioned herein are trademarks or trade names of their respective companies. For patents covering National Instruments

products/technology, refer to the appropriate location: Help»Patents in your software, the patents.txt file on your media, or the National

Instruments Patents Notice at ni.com/patents. Refer to the Export Compliance Information at ni.com/legal/export-compliance

for the National Instruments global trade compliance policy and how to obtain relevant HTS codes, ECCNs, and other import/export data.

Where to Go for Support

The National Instruments Web site 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.

National Instruments corporate headquarters is located at 11500 North Mopac Expressway,

Austin, Texas, 78759-3504. National Instruments also has offices located around the world to

help address your support needs. For telephone support in the United States, create your service

request at ni.com/support and follow the calling instructions or dial 512 795 8248. For

telephone support outside the United States, visit the Worldwide Offices section of ni.com/

niglobal to access the branch office Web sites, which provide up-to-date contact information,

support phone numbers, email addresses, and current events.

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