National Instruments RM-4339 Calibration Procedure
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National Instruments RM-4339 Calibration Procedure

National Instruments RM-4339 Calibration Procedure

Rack-mount accessory universal bridge
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CALIBRATION PROCEDURE
RM-4339
Rack-Mount Accessory Universal Bridge
This document contains the verification procedures for the National Instruments RM-4339. For
more information about calibration solutions, visit
Contents
Software.................................................................................................................................... 1
Documentation.......................................................................................................................... 2
Test Equipment......................................................................................................................... 3
Connecting the Calibrator to the RM-4339 ...................................................................... 4
Test Conditions......................................................................................................................... 4
Initial Setup............................................................................................................................... 5
Verification ............................................................................................................................... 5
SCA Shunt Calibration Resistance Accuracy Verification .............................................. 5
Offset Voltage Verification .............................................................................................. 7
Quarter-Bridge Shunt Calibration Accuracy Verification................................................ 9
Specifications............................................................................................................................ 12
World Wide Support and Services ........................................................................................... 13

Software

Calibrating the NI RM-4339 requires the installation of NI-DAQmx on the calibration system.
Driver support for the RM-4339 was first available in NI-DAQmx 14.5. 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
programming languages, including LabVIEW, LabWindows
Basic .NET. When you install NI-DAQmx, you only need to install support for the application
software that you intend to use.
Français
Deutsch
ni.com/manuals
ni.com/downloads
ni.com/calibration
. NI-DAQmx supports numerous
™
/CVI
™
, C/C++, C#, and Visual
.

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Summary of Contents for National Instruments RM-4339

  • Page 1: Table Of Contents

    Calibrating the NI RM-4339 requires the installation of NI-DAQmx on the calibration system. Driver support for the RM-4339 was first available in NI-DAQmx 14.5. 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.

  • Page 2: Documentation

    Documentation Consult the following documents for information about the RM-4339, NI-DAQmx, and your application software. All documents are available on and help files install with the ni.com software. NI PXIe-4339 and RM-4339 User Guide and Terminal Block Specifications NI-DAQmx installation, hardware setup, and RM-4339 specifications.

  • Page 3: Test Equipment

    RJ50 to Pigtail Cable (8) NI P/N: 195950-02 An RJ50 cable with a cable wire resistance < 0.2 Ω with better than 10% resistance mismatch between individual wires. RM-4339 Calibration Procedure | © National Instruments | 3...

  • Page 4: Connecting The Calibrator To The Rm-4339

    NI PXIe-4339 to the RM-4339 through the SH96-96-2 cable are located on the rear of the RM-4339 and are labeled A, B, and C. To fully verify the RM-4339, each of the verification procedures in this document must be conducted for each position A, B, and C.

  • Page 5: Initial Setup

    Initial Setup Refer to the NI PXIe-4339 and RM-4339 User 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). When a device is configured with MAX, it is assigned a device identifier.
  • Page 6 Compare the result from step 4 to the Upper Limit and Lower Limit values in Table 3. If the result is between these values, the module passes the test. Clear the task by calling DAQmx Clear Task. 6 | ni.com | RM-4339 Calibration Procedure...

  • Page 7: Offset Voltage Verification

    The offset voltage verification uses the NI PXIe-4339 to measure the offset voltage of the RM-4339. Prior to measuring the offset voltage of the RM-4339, an offset characterization is performed on the NI PXIe-4339 using a TB-4339/B/C to provide an electrical short on the input of the NI PXIe-4339.
  • Page 8 Clear the task by calling DAQmx Clear Task. Remove the TB-4339/B/C from the SH96-96-2 cable and connect the SH96-96-2 cable to the 96-pin connector on the back of the RM-4339. Connect an RJ50 cable to each channel with AI+ (pin 2) and AI- (pin 3) connected to T- (pin 9).

  • Page 9: Quarter-Bridge Shunt Calibration Accuracy Verification

    Complete the following procedure to verify the quarter-bridge shunt calibration accuracy of the RM-4339: Set the calibrator to standby mode (STBY). Using an RJ50 cable connect the calibrator to the channel of the RM-4339 you want to verify. Only one channel can be connected to the calibrator at a time.
  • Page 10 Clear the task by calling DAQmx Clear Task. Acquire an AI Bridge (V/V) measurement with shunt calibration enabled. Create a task. Create and configure an AI Bridge (V/V) channel according to the values found in Table 6. 10 | ni.com | RM-4339 Calibration Procedure...
  • Page 11 Property Node: DAQmx Channel AI.Bridge.ShuntCal.Enable: False Start the task by calling DAQmx Start Task. Average the readings that you acquired, subtract Result from the averaged result, and record the values as Unscaled OffsetComp RM-4339 Calibration Procedure | © National Instruments | 11...

  • Page 12: Specifications

    If the device is not operating within the specified values, refer to the World Wide Support and Services section for assistance in returning the device to NI. Specifications Refer to the NI PXIe-4339 and RM-4339 User Guide and Terminal Block Specifications for detailed specification information. 12 | ni.com | RM-4339 Calibration Procedure...

  • Page 13: World Wide Support And Services

    NI product. 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. NI MAKES NO EXPRESS OR IMPLIED WARRANTIES AS TO THE ACCURACY OF THE INFORMATION CONTAINED HEREIN AND SHALL NOT BE LIABLE FOR ANY ERRORS.

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