National Instruments SCXI-1120 User Manual
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National Instruments SCXI-1120 User Manual

National Instruments SCXI-1120 User Manual

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USER GUIDE
C
ALIBRATING THE
C
WITH
ALIBRATION
Contents
™
™
™
IVI
, National Instruments
, NI
herein are trademarks or trade names of their respective companies.
371112A-01
SCXI -1120/1120D
E
XECUTIVE
Introduction ............................................................................................. 2
What Is Calibration? ........................................................................ 2
Why Should You Calibrate? ............................................................ 2
How Often Should You Calibrate? .................................................. 2
Equipment and Other Test Requirements ............................................... 3
Test Equipment ................................................................................ 3
Connectors ................................................................................ 3
Documentation................................................................................. 4
Software ........................................................................................... 4
Test Conditions ................................................................................ 5
Calibration Procedures ............................................................................ 5
Configuring Your Module for Calibration....................................... 5
Configuring Digital Jumpers .................................................... 7
Configuring Gain Jumpers........................................................ 8
Configuring SCXI-1120 Filter Jumpers ................................... 9
Configuring SCXI-1120D Filter Jumpers ................................ 10
Configuring Potentiometers...................................................... 12
Setting Up Your Module for Calibration ......................................... 12
Running the Calibration Procedure.................................................. 14
Technical Support Resources.................................................................. 16
NI Web Support ............................................................................... 16
Worldwide Support.......................................................................... 16
™
™
, ni.com
, and SCXI
are trademarks of National Instruments Corporation. Product and company names mentioned
Copyright © 2001 National Instruments Corp. All rights reserved.
™
March 2001

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Summary of Contents for National Instruments SCXI-1120

  • Page 1: Table Of Contents

    , National Instruments , NI , ni.com , and SCXI are trademarks of National Instruments Corporation. Product and company names mentioned herein are trademarks or trade names of their respective companies. 371112A-01 Copyright © 2001 National Instruments Corp. All rights reserved.

  • Page 2: Introduction

    Introduction This document contains information and step-by-step instructions for loading and running a calibration procedure for the SCXI-1120/1120D module using Calibration Executive. What Is Calibration? Calibration consists of verifying the measurement accuracy of a module and adjusting for any measurement error. Verification is measuring performance of a module and comparing the results to the factory specifications.

  • Page 3: Equipment And Other Test Requirements

    If you do not have custom connection hardware, you may need the following connectors: • Terminal block such as the National Instruments SCXI-1320, SCXI-1327, or SCXI-1328 • SCXI-1349 shielded cable assembly, which includes an SH68-68-EP shielded cable and a cable adapter •...

  • Page 4: Documentation

    • SCXI Quick Start Guide • SCXI-1120/D User Manual You can download these documents from the National Instruments Web site ni.com/manuals Software Complete the following steps to install Calibration Executive: Make sure that your computer and monitor are powered on and that you have installed Windows 2000/NT/Me/9x.

  • Page 5: Test Conditions

    Configuring Your Module for Calibration This section describes how to configure the digital jumper settings, gain jumper settings, and filter jumper settings of your SCXI-1120/1120D module for the Calibration Executive procedure. Refer to Figure 1 and 2 to locate the jumpers on the SCXI-1120/1120 D module.
  • Page 6 Figure 1. SCXI-1120/1120D Parts Locator Diagram Note If you move any jumpers, be sure to restore them to their original positions after calibration. Calibrating 1120/1120D with Calibration Executive ni.com...

  • Page 7: Configuring Digital Jumpers

    Position 1—Connects MISO to SERDATOUT (factory-default setting). Connects SLOT0SEL* to the SCXIbus INTR* line after buffering (factory-default setting). Applies to Revision A and B of the SCXI-1120 modules only. Factory-default setting. B-R0R1—Factory-default setting in parking position. © National Instruments Corporation...

  • Page 8: Configuring Gain Jumpers

    1, 10, 50, and 100. The second-stage gain provides gains of 1, 2, 5, 10, and 20. Table 3 shows the jumpers for gain selection associated with each channel. Table 3. SCXI-1120/1120D Gain Jumper Allocation Input Channel First-Stage...

  • Page 9: Configuring Scxi-1120 Filter Jumpers

    Two filter bandwidths are available on the SCXI-1120: 10 kHz and 4 Hz. Table 5 contains the filter jumper allocations for the SCXI-1120. © National Instruments Corporation...

  • Page 10: Configuring Scxi-1120D Filter Jumpers

    W23-A W23-B W24-A W24-B Verify that both filtering stages of your SCXI-1120 are set to the same bandwidth to ensure that the required bandwidth is achieved. One jumper block is available for each filter stage. Configuring SCXI-1120D Filter Jumpers This section describes how to configure the filter jumpers on your SCXI-1120D.
  • Page 11 Verify that both filtering stages of your SCXI-1120D are set to the same bandwidth to ensure that the required bandwidth is achieved. One jumper block is available for each filter stage. © National Instruments Corporation Calibrating 1120/1120D with Calibration Executive...

  • Page 12: Configuring Potentiometers

    Configuring Potentiometers Refer to Figure 1 to locate the potentiometers on the SCXI-1120/1120D module. The Calibration Executive procedure prompts you to adjust these potentiometers as shown in Table 7. Table 7. Calibration Potentiometers Reference Designators Output Null Input Null Channel Number...

  • Page 13: Connecting Your Calibrator, Dmm, And Scxi Module

    The calibration procedure steps you through the connections between your calibrator, DMM, and the SCXI module. The first connections are as follows: Connect all negative inputs of each SCXI-1120/1120D channel together on the SCXI-1320, SCXI-1327, or SCXI-1328 terminal block. Connect all positive inputs of each channel together on the terminal block.

  • Page 14: Running The Calibration Procedure

    Connect the calibrator guard and ground together, then connect these to the CHO– of the terminal block. Connect the terminal block to the front of the SCXI-1120/1120D module. Connect the DMM HI voltage input to pin 3 of the 50-pin connector block.
  • Page 15 Your calibration report appears as a printable HTML file. You have completed calibrating your SCXI-1120/1120D module with Calibration Executive. Note If your SCXI-1120/1120D module fails after calibration, return it to National Instruments for repair or replacement. © National Instruments Corporation Calibrating 1120/1120D with Calibration Executive...

  • Page 16: Technical Support Resources

    Technical Support Resources NI Web Support National Instruments Web support is your first stop for help in solving installation, configuration, and application problems and questions. Online problem-solving and diagnostic resources include frequently asked questions, knowledge bases, product-specific troubleshooting wizards, manuals, drivers, software updates, and more. Web support is available through the Technical Support section of ni.com...

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Scxi-1120d

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