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LabVIEW™, Measurement Studio™, National Instruments™, NI™, ni.com™, and NI-DAQ™ are trademarks of 
National Instruments Corporation. Product and company names mentioned herein are trademarks or trade names of 
their respective companies. For patents covering National Instruments products, refer to the appropriate location: 

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 in your software, the 

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 file on your CD, or 

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.

February 2003

370050B-01

NI 6110/6111/6115/6120 
C

ALIBRATION

P

ROCEDURE

This document describes the procedure for verifying and adjusting a 
National Instruments 6110/6111/6115/6120 data acquisition (DAQ) 
device. This document contains four main sections:

 

Introduction

—This section tells you what calibration is, why you 

should calibrate devices, and how often you should calibrate.

Equipment and Other Test Requirements

—This section describes 

what you must do before calibrating the device, including an overview 
of the test equipment, software, calibration functions, and environment 
needed for calibration.

Calibration Process

—This section provides step-by-step instructions 

for verifying and calibrating your device.

NI 6110/6111/6115/6120 Specifications

—This section provides 

specification tables for the NI 6110/6111/6115/6120.

This document is intended for metrology labs. It does not cover 
programming technique or compiler configuration because of the number 
of programming languages and styles you can use to calibrate the device. 
However, NI-DAQ has many online help files that contain 
compiler-specific instructions and function explanations. You can install 
these help files when you install NI-DAQ.

Introduction

What Is Calibration?

Calibration is a set of operations that compares the values indicated by a 
measuring instrument or measuring system to the corresponding values 
realized by external standards. The result of a calibration can be used to 
determine the measurement error and can correct for it in the adjustment 
process.

The calibration process consists of verifying, adjusting, and reverifying a 
device. During verification, you compare the measured performance to an 

ni.com

Summary of Contents for NI 6110

Page 1: ...PXI 6120...

Page 2: ...equipment software calibration functions and environment needed for calibration Calibration Process This section provides step by step instructions for verifying and calibrating your device NI 6110 6...

Page 3: ...often you should calibrate the device NI recommends performing a complete calibration at least once every year You can shorten this interval based on the demands of your application Equipment and Oth...

Page 4: ...o create applications that use NI DAQ These documents are your primary references for writing a calibration utility For more information on the products you are calibrating refer to the device user ma...

Page 5: ...connections and test conditions during calibration use the following guidelines Keep connections to the device as short as possible Long cables and wires can act as antennae picking up extra noise tha...

Page 6: ...re These flowcharts only refer to the appropriate NI DAQ function calls You may want to refer to the Calibration Process section to the NI DAQ Function Reference Help and to the NI DAQ User Manual for...

Page 7: ...able for the product determine the channel output polarity and voltage to verify AO_VWrite deviceNumber chan voltage GPCTR_Control deviceNumber chan ND_RESET GPCTR_Set_Application deviceNumber chan ND...

Page 8: ...rocedure describes how to configure a device with NI DAQ 1 Install NI DAQ The latest version is available at ni com 2 Power off the computer and install the device in an available slot 3 Power on the...

Page 9: ...on Note Calibrator connections depend on the channel you are verifying The verification process requires you to individually test each channel 2 Use the following guide to determine the connections be...

Page 10: ...l AI_Configure to inform NI DAQ of the input mode input range and input polarity selected for the device Set the following parameters deviceNumber The value obtained from MAX chan The channel currentl...

Page 11: ...values 11 Make the appropriate connections to verify the next channel by repeating steps 2 and 3 and proceed from step 4 You have completed verifying the analog input levels on the device Verifying A...

Page 12: ...and lower limits on the data sheet If the value falls between these limits the device has passed this test 7 Repeat steps 4 6 to test all values 8 Disconnect the DMM from DAC0OUT and reconnect it to D...

Page 13: ...umber The value obtained from MAX gpctrNum 0 paramID ND_COUNT_2 paramValue 2 6 Call Select_Signal to route the counter signal to the GPCTR0_OUT pin on the device connector Set the following parameters...

Page 14: ...input channel 0 pin 68 3 Connect the negative output of the calibrator to analog input channel 0 pin 34 and to ACH0GND pin 67 4 Call Get_Cal_Date to obtain the date of the last calibration The functio...

Page 15: ...output operation To do this repeat the procedure in the Verifying the Performance of the NI 6110 6111 6115 6120 section NI 6110 6111 6115 6120 Specifications The tables in this section contain the sp...

Page 16: ...or output to verify performance This value is divided into two columns Location and Value Location refers to where the test value fits within the test range Pos FS is positive full scale and Neg FS i...

Page 17: ...8951 9 9050 9 8950 5 Bipolar 2 PosFS 4 95000 4 94741 4 95259 4 94734 4 95266 5 Bipolar 2 Zero 0 0000 0 00083 0 00083 0 00083 0 00083 5 Bipolar 2 NegFS 4 95000 4 95259 4 94741 4 95266 4 94734 2 Bipolar...

Page 18: ...800 41 3995 41 7605 41 3987 41 7613 42 Bipolar 0 2 Zero 0 0000 0 0366 0 0366 0 0366 0 0366 42 Bipolar 0 2 NegFS 41 5800 41 7605 41 3995 41 7613 41 3987 20 Bipolar 0 5 PosFS 19 8000 19 7319 19 8681 19...

Page 19: ...ipolar Zero 0 000000 0 008900 0 008900 0 008900 0 008900 20 Bipolar NegFS 9 990000 10 003266 9 976734 10 003435 9 976565 Table 10 Counter Values for the NI 6115 Counter Values Set Point MHz Lower Limi...

Page 20: ...03 0 008303 0 008303 1 Bipolar 10 NegFS 0 990000 0 999859 0 980141 0 999876 0 980124 0 5 Bipolar 20 PosFS 0 4950000 0 485919 0 504081 0 485911 0 504089 0 5 Bipolar 20 Zero 0 000000 0 008303 0 008303 0...

Page 21: ...NI 6110 6111 6115 6120 Calibration Procedure 20 ni com Table 13 Counter Values for the NI 6120 Counter Values Set Point MHz Upper Limit MHz Lower Limit MHz 5 4 9995 5 0005...

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