NI TC-4353 Calibration Procedure
Contents
1. l 2 Power on the thermocouple calibrator and set the thermocouple type to E type Wait the warm up time required by the thermocouple calibrator or 15 minutes whichever is longer Acquire a CJC temp0 value a Set the timing mode to 1 High Resolution b Configure the timing properties for a finite acquisition with a sample clock rate of 1 S s and 30 samples per channel c Start the task d Average the temperature data and record this value as cjc_temp0 Set the thermocouple calibrator output to C C_temp0 This ensures that during the thermocouple measurements the input channel measures very close to 0 V which eliminates gain errors in the NI PXIe 4353 Acquire and average data and determine the error a For every sample enable autozero and disable open thermocouple detection for the NI PXIe 4353 b Configure the temperature acquisition according to Table 2 4 Note When a module is configured with MAX it is assigned a module name Each function call uses this module name to determine which DAQ module to calibrate This document uses Dev1 to refer to the module name In the following procedures use the module name as it appears in MAX Start the acquisition NI TC 4353 Calibration Procedure National Instruments 9 c Start the task Note Make sure the thermocouple calibrator and NI PXIe 4353 are completely 10 settled at the desired temperature setting before acquiring data When using the Ect2. Requirements Thermocouple Ectron 1140A If this instrument is unavailable use a high Calibrator precision thermocouple source with an accuracy of at least 0 07 C and an output impedance of lt 10 Q Thermocouple Wire TT E 24 SLE 100 E type SLE 24 AWG 20 to 30 meters Strip Jackets Thermocouple Omega P N SMPW E M E type must fit the output terminal of the Connector thermocouple calibrator Thermocouple Omega P N SMP W E M E type mini thermocouple connector to fit Connector x33 the terminals of the TC 4353 Thermocouple Barrier Omega P N BS16A x4 32 channels Strips Thermocouple Barrier Omega P N BSJ E x6 E type 32 channels Thermocouple Spade Lugs Omega P N SLCH 20 x4 SLCO 20 x4 64 lugs of Chromel 64 lugs of Constantan to match the E type wires Spade Lug Crimping Tool Omega P N CRIMPING TOOL P Must effectively crimp the spade lugs with the 24 AWG wire PXI Express Chassis NI PXIe 1062Q Calibrated NI PXIe 4353 Module NI PXIe 4353 The module must be verified to be within its specifications Building and Connecting the TC 4353 Verification Assemblies Complete the following steps to build and connect the TC 4353 verification assemblies 1 Use the single thermocouple wire the spade lugs the spade lug crimping tool and the mini thermocouple connector to make a wire with a compensated mini thermocouple connector on one end and mult
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4. the NI PXIe 4353 must be currently verified to be within the product specifications If they are not verify the NI PXIe 4353 before verifying the TC 4353 Refer to the NI PXTe 4353 Calibration Procedure to verify the NI PXIe 4353 as needed e Maintain the TC 4353 in Configuration A by placing it on a desk a few feet from the PXIe chassis and protect the TC 4353 from any nearby air currents Do not place the TC 4353 in a rack with the NI PXIe 4353 Refer to the NJ PXTe 4353 and TC 4353 Installation Guide and Terminal Block Specifications and Info Code TC4353CONFIGURATIONS for additional information NI TC 4353 Calibration Procedure National Instruments 7 Initial Setup Refer to the NJ PXTe 4353 and TC 4353 Installation Guide and Terminal Block Specifications for information about how to install the software and hardware and how to configure the device in Measurement amp Automation Explorer MAX Complete the following steps to configure a module in MAX Refer to the NJ PXTe 4353 and TC 4353 Installation Guide and Terminal Block Specifications for complete installation instructions Note You can also perform the self test operation programmatically using the DAQmx Self Test Device VI or the equivalent C NET functionality 1 Install the NI DAQmx driver software A Caution Always have the PXI Express chassis powered off when inserting a module 2 Insert the calibrated NI PXIe 4353 into an available slot in the PXI E
5. CALIBRATION PROCEDURE NI TC 4353 Fran ais Deutsch AAG amp 30 ni com manuals fR This document contains the verification procedure for the National Instruments TC 4353 For more information about calibration solutions visit ni com calibration Contents SOMWALE siesccszs dies secctesesagts lo sebersvauessudesseedesdsats doschteol re ea e aE Ged CAREER i eaae daear ode ceysueuasdtonsatuneeede 1 DOCUMENEATON sisissessccssscessssesseossesiessessncivessesscesesicasessnsdeotesdsedsod EA TERA EE TEATAN AS 2 WSSt EQUIPMENt IEEE EEA E ENN E OE N E ENE N A T AA 3 Building and Connecting the TC 4353 Verification Assemblies ccecceseeeeeeeeeees 3 Test CONGILIOMS idein Eier aaie ea SEEN ENSE 7 Tnttial Setups sccceyeeviessessesSiaeetienadssavaassasssecdsceesenctestesstestcdeeaeneiabes as ctdets nib Pr Or SEERNE ESEE 8 Terminal Block Temperature Accuracy Verification id Whete to Go for Support e tceeciiaicat cecntecsessedes steed ian ra antandi einen 12 Software Calibrating the NI PXIe 4353 and TC 4353 requires the installation of NI DAQmx 9 6 or later on the calibration system You can download NI DAQmx from ni com downloads NI DAQmx supports a number of programming languages including 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 INSTRUMENTS y NATIONAL Documentatio
6. iple spade lug leads on the other end as shown in Figure 1 Note Compensated spade lug colors in Figures 1 2 and 4 are for illustration purposes only and are used to easily differentiate and NI TC 4353 Calibration Procedure National Instruments 3 Figure 1 Mini Thermocouple Connector to Compensated Spade Lug Assembly 1 Total of 32 Terminals 2 Using a mini thermocouple connector and the remaining spade lugs make 32 cables with a mini thermocouple connector on one end and the compensated spade lugs on the other end as shown in Figure 2 Figure 2 Thermocouple Compensated Spade Lug Assembly TE o E en E 4 nicom NI TC 4353 Calibration Procedure 3 Assemble the barrier strips and barrier strip jackets as indicated by the manufacturer while referring to Figure 3 Figure 3 Barrier Strip Jacket Installation 1 Barrier Strip 2 Barrier Strip Jacket 3 Terminal Screws 4 Using the assembled barrier strips and cables from steps 1 through 3 make the connections shown in Figure 4 between the thermocouple calibrator and the 32 channels of the TC 4353 4 Note Figure 4 shows wiring for eight channels Make similar connections for the 24 remaining channels NI TC 4353 Calibration Procedure National Instruments 5 Figure 4 Thermocouple Calibrator to TC 4353 Connections Objects Not to Scale 1 TC 4353 2 Barrier Strip Assembly 3 Thermocouple Ca
7. librator Place the barrier strip section into an otherwise empty box Close the lid and leave only a small opening for the wires to enter and exit the box as shown in Figure 5 This setup isolates the barrier strip from air currents and rapid temperature transients Refer to Figure 5 6 nicom NI TC 4353 Calibration Procedure Figure 5 Rapid Temperature Transient Isolation Box 1 One Channel In 2 Empty Box Containing Barrier Strip 3 32 Channels Out Test Conditions The following setup and environmental conditions are required to ensure the NI PXIe 4353 meets published specifications e Keep connections to the NI PXIe 4353 as short as possible Long cables and wires act as antennas picking up extra noise that can affect measurements e Verify that all connections to the NI PXIe 4353 are secure e Maintain an ambient temperature of 23 C 5 C The NI PXIe 4353 temperature will be greater than the ambient temperature e Keep relative humidity below 80 e Allow a warm up time of at least 15 minutes to ensure that the NI PXIe 4353 and TC 4353 measurement circuitry are at a stable operating temperature Ensure that the PXI Express chassis fan speed is set to HIGH that the fan filters are clean and that the empty slots contain filler panels For more information refer to the Maintain Forced Air Cooling Note to Users document available at ni com manuals e Tocorrectly verify the TC 4353
8. n Consult the following documents for information about the NI PXIe 4353 and TC 4353 NI DAQmx and your application software All documents are available on ni com and help files install with the software amp a NI PXTe 4353 and TC 4353 Installation Guide and Terminal Block Specifications Contains NI DAQmx installation and hardware setup NI XPIe 4353 User Manual Contains NI PXI3 4353 specific information NI PXTe 4353 Specifications Contains NI PXIe 4353 specifications and calibration interval NI DAQmx Readme Contains Operating system and application software support in NI DAQmx NI DAQmx Help Contains information about creating applications that use the NI DAQmx driver LabVIEW Help Contains LabVIEW programming concepts and reference information about NI DAQmx VIs and functions NI DAQmx C Reference Help Contains Reference information for NI DAQmx C functions and NI DAQmx C properties NI DAQmx NET Help Support for Visual Studio Contains Reference information for NI DAQmx NET methods and NI DAQmx NET proper ties key concepts and a C enum to NET enum mapping table 2 nicom NI TC 4353 Calibration Procedure Test Equipment Table 1 lists the equipment recommended for the performance verification procedures If the recommended equipment is not available select a substitute using the requirements listed in Table 1 Table 1 Recommended Equipment Equipment Recommended Model
9. nal block verification test limits Table 3 Terminal Block Verification Test Limits with Autozero Enabled Timing Mode 1 High Resolution Range C 1 Year Limits C Test Point TC Type Minimum Maximum Value C Lower Limit Upper Limit E 270 1000 CJC_temp0 0 28 0 28 NI TC 4353 Calibration Procedure National Instruments 11 Where to Go for Support The National Instruments Web site 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 National Instruments corporate headquarters is located at 11500 North Mopac Expressway Austin Texas 78759 3504 National Instruments also has offices located around the world to help address your support needs For telephone support in the United States create your service request at ni com support and follow the calling instructions 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 Web sites which provide up to date contact information support phone numbers email addresses and current events Refer to the M Trademarks and Logo Guidelines at ni com trademarks for more information on National Instruments trademarks Other product and company names mentioned herein
10. ron 1140A wait at least 300 ms for the system to settle before issuing the start task function to the NI PXIe 4353 d Determine the temperature error using the formula found below Temperature_error_Ch_x Temperature_Ch_x CJC_temp0 where Temperature_error_Ch_x is the error in C for channel x Temperature_Ch_x is the average of measured temperature for channel x CJC_temp0 is the temperature of the CJC and the temperature output of the calibrator x is the number of a particular channel e Record the difference as Temperature_error_Ch_x where x is the number of the particular channel Compare the resulting errors for each channel to the Upper Limit and Lower Limit values in Table 3 If the result is between these values for each channel the terminal block passes Clear the task ni com NI TC 4353 Calibration Procedure If the verification procedure determines that the TC 4353 is outside of the specifications refer to the Where to Go for Support section for assistance in returning the terminal block to NI Table 2 Configuration Values Configuration Value TC Physical Channel Name Dev1 ai0 31 Sample Mode Finite samples Timing Mode 1 High resolution Sample Clock Rate 1 S s Samples per Channel 30 Measurement Type Thermocouple Max Input Limit 100 0 Min Input Limit 0 0 Units C Thermocouple Type E CJC Source Built in CJC Value 0 0 Table 3 contains the termi
11. xpress chassis A Caution Make sure the TC 4353 has three keys installed in its connector and that none of the keys are loose The keying locations are shown in Figure 6 If any of the three keys are missing or loose refer to the Where to Go for Support section for assistance in returning the terminal block to NI Figure 6 TC 4353 Connector Key Locations DBHEHESHDSDHBBDOHGOHGHGOHDEAGAGEAGAGGGA GA G HGG GG GH GAA GAGA ee lt lt T f J 1 Key Locations Screw the two standoffs into the NI PXIe 4353 module Connect the TC 4353 to the NI PXIe 4353 using the SH96 96 1 cable Power on the chassis Launch MAX DS Ry Ga 8 nicom NI TC 4353 Calibration Procedure Expand Devices and Interfaces to confirm that MAX detects the module and terminal block The terminal block should appear beneath its associated module Right click NI PXTe 4353 and select Self Test to ensure that the module is working properly Terminal Block Temperature Accuracy Verification System level verification determines how well the module and terminal block meet the temperature accuracy specifications By completing the following procedure you can determine the terminal block drift over time Table 3 shows the test points and test limits for the terminal block Throughout the temperature accuracy verification process use Table 3 to determine if the module is operating within its specified range
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