background image

CALIBRATION PROCEDURE

NI 9216/9226

8-Channel, 400 S/s Aggregate, 0 

Ω

 to 400 

Ω

/4000 

Ω,

 

PT100 RTD/PT1000 RTD C Series Temperature Input Module

This document contains the verification and adjustment procedures for the NI 9216 and NI 9226. 
In this document, the NI 9216 and NI 9226 are inclusively referred to as NI 9216/9226. For more 
information about calibration solutions, visit 

ni.com/calibration

.

Contents

Software.................................................................................................................................... 1
Documentation.......................................................................................................................... 2
Test Equipment......................................................................................................................... 3
Test Conditions......................................................................................................................... 3
Initial Setup............................................................................................................................... 3
Verification............................................................................................................................... 4

Accuracy Verification....................................................................................................... 4

Adjustments .............................................................................................................................. 6

Accuracy Adjustment ....................................................................................................... 6

EEPROM Update ..................................................................................................................... 7
Reverification ........................................................................................................................... 7
Accuracy Under Calibration Conditions .................................................................................. 7
Worldwide Support and Services ............................................................................................. 8

Software

Calibrating the NI 9216/9226 requires the installation of NI-DAQmx 14.5 or later on the 
calibration system. You can download NI-DAQmx from 

ni.com/downloads

. NI-DAQmx 

supports 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.

Summary of Contents for 9216

Page 1: ... 2 Test Equipment 3 Test Conditions 3 Initial Setup 3 Verification 4 Accuracy Verification 4 Adjustments 6 Accuracy Adjustment 6 EEPROM Update 7 Reverification 7 Accuracy Under Calibration Conditions 7 Worldwide Support and Services 8 Software Calibrating the NI 9216 9226 requires the installation of NI DAQmx 14 5 or later on the calibration system You can download NI DAQmx from ni com downloads N...

Page 2: ...t NI 9216 circuitry and specifications NI 9226 Getting Started Guide NI 9226 connection information NI 9226 Datasheet NI 9226 circuitry and specifications 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 fun...

Page 3: ...midity below 80 Allow a warm up time of at least 10 minutes to ensure that the NI 9216 9226 measurement circuitry is at a stable operating temperature Initial Setup Complete the following steps to set up the NI 9216 9226 1 Install NI DAQmx 2 Make sure the cDAQ 9178 power source is not connected to the chassis 3 Connect the cDAQ 9178 chassis to the system safety ground a Attach a ring lug to a 14 A...

Page 4: ...ing procedure to determine the As Found status of the NI 9216 9226 1 Set the calibrator to Standby mode STBY 2 Connect the desired channel of the NI 9216 9226 to the calibrator as shown in Figure 1 Connect only one channel at a time Figure 1 4 Wire Resistance Connections 3 Set the calibrator as a resistance source to a Test Point value indicated in Table 2 4 Set calibrator COMP to 4 wire Table 2 N...

Page 5: ... in AIx For example use AI3 for channel 3 c Configure the task timing according to Table 4 d Start the task e Read the samples from the NI 9216 9226 f Average the samples g Stop and clear the task 7 Compare the per channel averages to the limits in Table 2 8 Set the calibrator to Standby mode STBY 9 Repeat steps 3 through 8 for each test point listed in Table 2 10 Disconnect the NI 9216 9226 chann...

Page 6: ...tain an array of recommended calibration resistance values d Set the calibrator to a reference value determined by the array of recommended calibration voltages e Set calibrator COMP to 4 wire f Set the calibrator to Operate mode OPR g Call and configure the NI 9216 9226 adjustment function according to Table 5 Note Use appropriate channel number in place of x in AIx For example use AI3 for channe...

Page 7: ...justment verify that you have met the Test Conditions 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 follow...

Page 8: ...ained 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 Worldwide Support and Services The NI website is your complete resource for technical support At ni com support you have access to everything from troubleshooting and application development self help ...

Reviews: