National Instruments 9775 Calibration Procedure Download Page 1

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CALIBRATION PROCEDURE

NI 9775

±10 V, 20 MS/s/ch, 14-Bit, 4-Channel C Series Digitizer Module

This document contains the verification and adjustment procedures for the NI 9775. For more
information on calibration, visit

ni.com/calibration

Software

Calibrating the NI 9775 requires the installation of NI-DAQmx 17.6 or later. 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.

Documentation

Consult the following documents for information about the NI 9775, NI-DAQmx, and your
application software. All documents are available on

ni.com/manuals

and help files install with

the software.
•

NI cDAQ-9174/9178 USB Chassis Quick Start

•

NI 9775 Datasheet

•

NI 9775 Getting Started Guide

•

NI-DAQmx Readme

•

LabVIEW Help

•

NI-DAQmx C Reference Help

•

NI-DAQmx .NET Help Support for Visual Studio

Test Equipment

The following table lists the equipment recommended for the performance verification and
adjustment procedures. If the recommended equipment is not available, select a substitute
using the requirements.

Summary of Contents for 9775

Page 1: ...install support for the application software that you intend to use Documentation Consult the following documents for information about the NI 9775 NI DAQmx and your application software All documents are available on ni com manuals and help files install with the software NI cDAQ 9174 9178 USB Chassis Quick Start NI 9775 Datasheet NI 9775 Getting Started Guide NI DAQmx Readme LabVIEW Help NI DAQm...

Page 2: ...ature Initial Setup Complete the following steps to set up the NI 9775 1 Install NI DAQmx 2 Make sure the cDAQ 9178 power source is not connected 3 Install the module in slot 8 of the cDAQ 9178 chassis Leave slots 1 through 7 of the cDAQ 9178 chassis empty 4 Connect the cDAQ 9178 chassis to your host computer 5 Connect the power source to the cDAQ 9178 chassis 6 Launch Measurement Automation Explo...

Page 3: ...erate mode OPR 5 Acquire samples from the NI 9775 and extract 50 kHz amplitude information a Create and configure an AI voltage task on the NI 9775 according to the following table Table 3 NI 9775 AI Task Configuration for AC Accuracy Verification Physical Channels Min V Max V Terminal Configuration Scaled Units cDAQMod8 AI0 3 10 10 RSE Volts b Configure the AI voltage task timing according to the...

Page 4: ...0 12 dB 0 12 dB Note The test limits listed in this table are derived using the values in the NI 9775 Accuracy Under Calibration Conditions table Note The uncertainty of the calibration standard is not included in these limits 7 Set the calibrator to Standby mode STBY 8 Disconnect the NI 9775 from the calibrator DC Accuracy Verification Complete the following procedure to determine the As Found st...

Page 5: ...or DC Accuracy Verification AI ADCTimingMode AI Lowpass Enable High Speed False High Speed True High Resolution True d Start the task e Read the samples from the NI 9775 f Average the readings g Stop and clear the task 6 Compare the per channel averages to the limits in the following table Table 10 NI 9775 Verification Limits for DC Accuracy Channel Property Settings Test Point 1 Year Limits V ADC...

Page 6: ...formance adjustment procedure describes the sequence of operation required to adjust the NI 9775 AC Accuracy Adjustment Complete the following procedure to adjust the AC accuracy performance of the NI 9775 Note Adjust AC accuracy first then DC accuracy Always adjust DC accuracy whenever you adjust AC accuracy 1 Set the calibrator to Standby mode STBY 2 Connect the NI 9775 to the calibrator as show...

Page 7: ...the NI 9775 to the calibrator as shown in the AC Accuracy Verification section 3 Adjust the NI 9775 a Initialize a calibration session on the NI 9775 The default password is NI b Input the external temperature in degrees Celsius c Call the NI 9775 get C Series adjustment points function with coupling mode set to DC to obtain an array of recommended calibration voltages for the NI 9775 d Set the ca...

Page 8: ...nditions before returning your device to NI Refer to Worldwide Support and Services for assistance in returning the device to NI Accuracy Under Calibration Conditions The values in the following table are based on calibrated scaling coefficients which are stored in the onboard EEPROM The following accuracy table is valid for calibration under the following conditions Ambient temperature 23 C 5 C N...

Page 9: ... s declaration of conformity This system affords the user protection for electromagnetic compatibility EMC and product safety You can obtain the DoC for your product by visiting ni com certification If your product supports calibration you can obtain the calibration certificate for your product at ni com calibration NI corporate headquarters is located at 11500 North Mopac Expressway Austin Texas ...

Page 10: ...ents EULAs and third party legal notices in the readme file for your NI product Refer to the Export Compliance Information at ni com legal export compliance for the NI 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 ...

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