background image

© 2008–2014 National Instruments. All rights reserved. 

372518C-01

Feb14

Refer to the 

NI Trademarks and Logo Guidelines 

at 

ni.com/trademarks

 for more information on 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

. You can find information about end-user license agreements (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 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. U.S. Government Customers: The data contained in this manual was developed at private expense and is subject to the applicable 
limited rights and restricted data rights as set forth in FAR 52.227-14, DFAR 252.227-7014, and DFAR 252.227-7015.

Where to Go for Support

The National Instruments website 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.

Visit 

ni.com/services

 for NI Factory Installation Services, repairs, extended warranty, and 

other services.

Visit 

ni.com/register

 to register your National Instruments product. Product registration 

facilitates technical support and ensures that you receive important information updates from NI. 

A Declaration of Conformity (DoC) is our claim of compliance with the Council of the European 
Communities using the manufacturer’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

.

National Instruments corporate headquarters is located at 11500 North Mopac Expressway, 
Austin, Texas, 78759-3504. National Instruments also has offices located around the world. For 
telephone support in the United States, create your service request at 

ni.com/support

 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 websites, which provide up-to-date 

contact information, support phone numbers, email addresses, and current events.

Summary of Contents for 9225

Page 1: ...cation 4 Accuracy Verification 5 Gain Matching Verification 6 Phase Matching Verification 8 Adjustment 9 Accuracy Adjustment 9 EEPROM Update 10 Reverification 10 Accuracy Under Calibration Conditions 10 Where to Go for Support 11 Software Calibrating the NI 9225 requires the installation of NI DAQmx 9 3 or later on the calibration system You can download NI DAQmx from ni com downloads NI DAQmx sup...

Page 2: ...ions and Specifications NI 9225 specific information specifications and calibration interval NI DAQmx Readme Operating system and application software support in NI DAQmx LabVIEW Help LabVIEW programming concepts and reference information about NI DAQmx VIs and functions NI DAQmx C Reference Help Reference information for NI DAQmx C functions and NI DAQmx C properties NI DAQmx NET Help Support for...

Page 3: ... for all cable connections to the NI 9225 Use twisted pairs wire to eliminate noise and thermal offsets Maintain an ambient temperature of 23 C 5 C The NI 9225 temperature will be greater than the ambient temperature Keep relative humidity below 80 Allow a warm up time of at least 10 minutes to ensure that the NI 9225 measurement circuitry is at a stable operating temperature Table 1 Recommended E...

Page 4: ...tem safety ground 4 Install the module in slot 8 of the NI cDAQ 9178 chassis Leave slots 1 through 7 of the NI cDAQ 9178 chassis empty 5 Connect the NI cDAQ 9178 chassis to your host computer 6 Connect the power source to the NI cDAQ 9178 chassis 7 Launch Measurement Automation Explorer MAX 8 Right click the device name and select Self Test to ensure that the module is working properly Verificatio...

Page 5: ... to Operate mode OPR 5 Acquire and average samples a Create and configure an AI voltage task according to Table 2 b Configure the task timing according to Table 3 c Start the task d Read samples from the NI 9225 e Average the samples f Stop the task g Clear the task Table 2 NI 9225 AI Voltage Task Configuration for Phase Matching Physical Channels Minimum Vrms Maximum Vrms Terminal Configuration A...

Page 6: ...tus of the NI 9225 1 Connect the NI 9225 to the function generator as shown in Figure 2 Figure 2 Gain Matching Verification Connections 2 Configure function generator according to Table 5 Table 4 NI 9225 Verification Test Limits for Accuracy Range Test Point 1 Year Limits Min Vrms Max Vrms Location Value VDC Lower Limit VDC Upper Limit VDC 300 300 Max 403 75 403 431250 404 068750 Mid 0 00 0 052275...

Page 7: ...nnel using the AmplitudeAcq value 6 Compare the channel to channel gain difference to the maximum limit of 0 25 dB 7 Disable the function generator 8 Disconnect the function generator from the device If the Gain Matching verification procedure determines that the NI 9225 is outside of the limits refer to Where to Go for Support for assistance in returning the device to NI Table 6 NI 9225 Configura...

Page 8: ...ire samples a Create and configure an AI voltage task according to Table 9 b Configure the task timing according to Table 10 c Start the task d Read samples from the NI 9225 e Clear the task Table 8 Function Generator Configuration for Phase Matching Verification Signal Type Amplitude Vpk Sinewave 9 Table 9 NI 9225 Voltage Task Configuration for Phase Matching Verification Physical Channels Termin...

Page 9: ...just the accuracy performance of the NI 9225 1 Set the calibrator to Standby mode STBY 2 Connect the NI 9225 to the calibrator as shown in Figure 1 3 Adjust the NI 9225 a Initialize a calibration session on the NI 9225 The default password is NI b Input the external temperature in degrees Celsius c Call the NI 9225 get C Series adjustment points function to obtain an array of recommended calibrati...

Page 10: ...ils Reverification after performing an adjustment verify that you have met the Test Conditions before returning your device to NI Refer to Where to Go for Support 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 vali...

Page 11: ...ebsite 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 Visit ni com services for NI Factory Installation Services repairs extended warranty and other services Visit ni com register to register your National Instruments prod...

Reviews: