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National Instruments 9238 Calibration Manual
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National Instruments 9238 Calibration Manual

4-channel, +-0.5 v, 24-bit simultaneous, channel-to-channel isolated analog input module
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CALIBRATION PROCEDURE
NI 9238
4-Channel, ±0.5 V, 24-Bit Simultaneous, Channel-to-Channel Isolated
Analog Input Module
This document contains the verification and adjustment procedures for the NI 9238. For more
information about calibration solutions, visit
.
ni.com/calibration
Contents
Software.................................................................................................................................... 1
Documentation.......................................................................................................................... 2
Test Equipment......................................................................................................................... 2
Test Conditions......................................................................................................................... 3
Initial Setup............................................................................................................................... 3
Verification............................................................................................................................... 4
Accuracy Verification....................................................................................................... 4
Adjustment................................................................................................................................ 6
EEPROM Update ..................................................................................................................... 6
Reverification ........................................................................................................................... 7
Where to Go for Support .......................................................................................................... 7

Software

Calibrating the NI 9238 requires the installation of NI-DAQmx 14.1 or later on the calibration
system. You can download NI-DAQmx from
. NI-DAQmx supports
ni.com/downloads
™
™
LabVIEW, LabWindows
/CVI
, ANSI C, Microsoft Visual C++, Microsoft Visual Basic
.NET, and Microsoft Visual C#. When you install NI-DAQmx, you only need to install support
for the application software that you intend to use.

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Summary of Contents for National Instruments 9238

  • Page 1: Table Of Contents

    EEPROM Update ........................6 Reverification ........................... 7 Where to Go for Support ......................7 Software Calibrating the NI 9238 requires the installation of NI-DAQmx 14.1 or later on the calibration system. You can download NI-DAQmx from . NI-DAQmx supports ni.com/downloads ™...

  • Page 2: Documentation

    Documentation Consult the following documents for information about the NI 9238, NI-DAQmx, and your application software. All documents are available on and help files install with the ni.com software. NI cDAQ-9174/9178 Quick Start NI-DAQmx installation and hardware setup NI 9238 Operating Instructions and Specifications...

  • Page 3: Test Conditions

    Test Conditions The following setup and environmental conditions are required to allow the NI 9238 to meet the performance levels shown in Table 2: • Keep connections to the NI 9238 as short as possible. Long cables and wires act as antennas, picking up extra noise that can affect measurements.

  • Page 4: Verification

    Verification The following performance verification procedure describes the sequence of operation and test points required to verify the NI 9238. The verification procedure assumes that the calibration Test Equipment references have traceable uncertainties that meet the requirements listed in the section.
  • Page 5 NI 9238. For operational specifications, refer to the most recent NI 9238 Operating Instructions and Specifications at ni.com/manuals...

  • Page 6: Adjustment

    Input the external temperature in degrees Celsius using the set temperature C Series function. Call the NI 9238 get C Series adjustment points function to obtain an array of recommended calibration voltages for the NI 9238. Set the calibrator to a reference value determined by the array of recommended calibration voltages.

  • Page 7: Reverification

    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.