NI TB-4353 Calibration Procedure
Contents
1. 5 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 6 This setup isolates the barrier strip from air currents and rapid temperature transients Refer to Figure 6 Figure 6 Rapid Temperature Transient Isolation Box 1 One Channel In 2 Empty Box Containing Barrier Strip 3 32 Channels Out Power on the thermocouple calibrator and set the thermocouple type to E type Ensure that the cover is installed properly on the terminal block Wait the warm up time required by the thermocouple calibrator or 15 minutes whichever is longer 9 Create and configure an AI Temp Built In Sensor channel for CJC channel __cjtemp0 on the NI PXIe 4353 10 Set the timing mode to 1 High Resolution 11 Configure the timing properties for a finite acquisition with a sample clock rate of 1 S s and 30 samples per channel 12 Start the temperature acquisition 13 Average the temperature data and record this value as cjc_temp0 14 Set the thermocouple calibrator output to CJC_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 15 Create and configure an AI Temp TC channel for the NI PXIe 4353 for all 32 channels 16 For every sample enable autozero and disable open thermocouple detection for the NI PXIe 4353 17 Set the timing mode to 1 High2. Resolution 18 Configure the timing properties for the temperature acquisition according to Table 2 19 Start the acquisition NI TB 4353 Calibration Procedure National Instruments 11 20 Acquire the temperature data Note Make sure the thermocouple calibrator and NI PXIe 4353 are completely settled at the desired temperature setting before acquiring data When using the Ectron 1140A wait at least 300 ms for the system to settle before issuing the start task function to the NI PXIe 4353 21 Average the temperature values separately for each channel that you acquired and record the average as Temperature_Ch_x where x is the number of the particular channel Subtract CJC_temp0 from each average 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 22 Clear the acquisition If the verification procedure determines that the TB 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 Sample Clock Rate 1 S s Samples per Channel 30 Measurement Type Thermocouple Max
3. driver installed on the calibration system before calibrating the module Note NI recommends that you install the NI DAQmx driver software before physically installing the NI PXIe 4353 NI DAQm x available at ni com downloads configures and controls the NI PXIe 4353 NI DAQmx supports a number of programming languages including LabVIEW LabWindows CVI C C C and Visual Basic NET You can access the NI DAQmx header file NIDAQmx h like any standard library To find examples for using the NI DAQmx driver go to ni com info and enter the Info Code NIDAQmxExLoc There you will find the topic Where Can I Find NI DAQmx Examples that provides example information Qr NATIONAL gt INSTRUMENTS Documentation Requirements The following documents are your primary references for writing your calibration utility with NI DAQmx You can download the latest version of these documents from the NI Web site at ni com manuals The MI PXTe 4353 and TB 4353 Installation Guide and Terminal Block Specifications provides instructions for installing and configuring the NI PXIe 4353 module and TB 4353 accessory The MI PXTe 4353 User Manual describes how to use the NI PXIe 4353 The MI PXTe 4353 Specifications lists the specifications for the NI PXIe 4353 The MI PXTe 4353 Calibration Procedure provide calibration information for the NI PXIe 4353 The CAL 4353 Specifications lists the specifications for the CAL 4353 The NI DAQm
4. CALIBRATION PROCEDURE NI TB 4353 Francais Deutsch am 0 PX ni com manuals This document contains information about verifying National Instruments PXIe 4353 modules using NI DAQmx 9 3 and later It also contains information about verifying systems that include both the NI PXIe 4353 and TB 4353 For more information about calibration visit ni com calibration Contents Software Requirements naen eE e EEE eE E E aac E EEEN TEE aie 1 Documentation Requirement ss sici cctsciesctesedsvsesssesansssvassesasnesctscseadseaeostosesstsisssesebsoaraenouancaetnets 2 Calibration Interval ee Test Equipment sid Test Conditions sice n in rena raria EREKE AA EE EER voseees 4 TB 4353 Calibration Proced re sersrercssseissssesrriessersao tintar iresnsaitnus einean dasi arasa daranas 4 Nitia SetU Pipi rriorse orien esis sacseesiasacsateane ctecdsctscavscastbsatesteaesaucsbaases lis siete apsapsapeapeaseonsayeesioss 5 Verifying Module Operating Temperature Changes ccscescesesseeseeeceeeeeeeeeeeeeenseeteees 7 Terminal Block Temperature Accuracy Verification ccccccscsssescessesseeseeeseeeeeeeeeeeneeees 7 LS e tases tain inectastetesttelweescessigus ees aston Terminal Block Verification Test Se Where to Go for Support eisian ate aie iea aeaa EEE ET GENENE NERE EEEE Software Requirements Install NI DAQmx 9 3 or later on the calibration computer You must have the proper module
5. Input Limit 100 0 Min Input Limit 0 0 Units 2C Thermocouple Configuration N A Thermocouple Type E CJC Source Built in CJC Value 0 0 12 ni com NI TB 4353 Calibration Procedure Limits Table 3 lists the specifications that the NI PXIe 4353 and TB 4353 system should meet if it has been one year between calibrations The following definitions describe how to use the information from Table 3 Test Point The temperature value that is input for verification purposes e 1 Year Limits Contains the Upper Limits and Lower Limits for the test point value That is when the module is within its 1 year calibration interval the test point value should fall between these upper and lower limit values Terminal Block Verification Test Table 3 contains the terminal 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 33 0 33 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 loc
6. WG wire PXI Express Chassis NI PXIe 1062Q Accessory TB 4353 This accessory is used for system verification Calibrated NI PXIe 4353 Module NI PXIe 4353 The module must be verified to be within its specifications NI TB 4353 Calibration Procedure National Instruments 3 Test Conditions The following setup and environmental conditions are required to ensure the module meets published specifications e Keep connections to the module 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 device are secure e Maintain an ambient temperature of 23 C 5 C The module temperature will be greater than the ambient temperature e Keep relative humidity below 80 e Allow a warm up time of 15 minutes to ensure that the measurement circuitry of the NI PXIe 4353 and TB 4353 are at a stable operating temperature e Use shielded wire for all cable connections to the module Use twisted pair wire to eliminate noise 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 To correctly verify the TB 4353 the NI PXIe 4353 must be currently verified to be within the product specificati
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8. e recorded during the last calibration adjustment 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 in the Terminal Block Verification Test section 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 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 multiple spade lug leads on the other end as shown in Figure 2 EN Note Compensated spade lug colors in Figures 2 3 and 5 are for illustration purposes only and are used to easily differentiate and NI TB 4353 Calibration Procedure National Instruments 7 Figure 2 Mini Thermocouple Connector to Compensated Spade Lug Assembly 1 Total of 32 Terminals 2 Using the thermocouple wire and the remaining spade lugs make 32 cables with bare leads on one end and the compensated spade lugs on the other end as shown in Figure 3 Figure 3 Thermocouple Compensated Spade Lug Assembly E E 8 ni com NI TB 4353 Calibration Procedure Assemble the barrier st
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10. l Setup You must configure the module in Measurement amp Automation Explorer MAX to communicate with NI DAQmx Complete the following steps to configure a module in MAX Refer to the NJ PXTe 4353 and TB 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 Express chassis A Caution Make sure the TB 4353 has three keys installed in its connector and that none of the keys are loose The keying locations are shown in Figure 1 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 NI TB 4353 Calibration Procedure National Instruments 5 Figure 1 TB 4353 Connector Key Locations 1 Zr Ooo000 00 00 00 00 00 00 00 00 00 00 00 00 000 ws Zr Iz LI Oo000 00 00 00 00 00 00 00 00 0000 0000 000 Oo000 0000000 00 00 00 00 00 00 00 000000 i 1 Key Locations Attach the TB 4353 to the NI PXIe 4353 Power on the chassis Launch MAX Expand Devices and Interfaces to confirm that MAX detects the module a
11. nd terminal block The terminal block should appear beneath its associated module 7 Right click NI PXIe 4353 and select Self Test to ensure that the module is working properly Dye e a 6 ni com NI TB 4353 Calibration Procedure Verifying Module Operating Temperature Changes A module operating temperature greater than 10 C since the previous calibration adjustment can cause you to incorrectly calibrate your module The onboard temperature sensor on the module can be used to verify that this condition does not exist Complete the following steps to compare the current module temperature to the temperature measured during the last calibration Note You can also query the temperatures programmatically using the DAQmx Calibration Info property node or the equivalent C NET functionality Launch MAX 2 Select My System Devices and Interfaces Chassis 1 NI PXIe 4353 Click the Calibration tab If the difference between the current operating temperature and the operating temperature from the last calibration adjustment is greater than 10 C the limits in the calibration tables are not valid A Note The temperature reading returned by the module is an internal temperature Typically the internal temperature is approximately 10 C warmer than the ambient temperature If the module temperature difference is outside the maximum range you should change the system so that the operating temperature will be closer to the temperatur
12. ons If they are not verify the NI PXIe 4353 before verifying the TB 4353 Refer to the NI PXTe 4353 Calibration Procedure to verify the NI PXIe 4353 as needed TB 4353 Calibration Procedure This section provides instructions for verifying the performance of a TB 4353 The system level calibration process consists of the following steps 1 Initial Setup Configure the NI PXIe 4353 and the TB 4353 in NI DAQmx 2 Verifying Module Operating Temperature Changes Verify that the current module operating temperature will not cause you to incorrectly calibrate your module 3 Terminal Block Temperature Accuracy Verification Verify the existing operation of the NI PXIe 4353 with the TB 4353 This step confirms whether the module and terminal block are operating within the specified range or require adjustment 4 Adjustment TIf the system falls within the desired specifications you can skip this step If the NI PXIe 4353 does not fall within the desired specifications verify that the NI PXIe 4353 passed verification in the M PXTe 4353 Calibration Procedure document and that all test conditions are followed If the NI PXIe 4353 passed verification and the test conditions are valid return the TB 4353 to the factory for analysis 5 Reverification Repeat the verification procedure to ensure that the module is operating within the published specifications after adjustment 4 ni com NI TB 4353 Calibration Procedure Initia
13. rips and barrier strip jackets as indicated by the manufacturer while referring to Figure 4 Figure 4 Barrier Strip Jacket Installation 1 Barrier Strip 2 Barrier Strip Jacket 3 Terminal Screws NI TB 4353 Calibration Procedure National Instruments 9 4 Using the assembled barrier strips and cables from steps 1 through 3 make the connections shown in Figure 5 between the thermocouple calibrator and the 32 channels of the TB 4353 Note Figure 5 shows wiring for eight channels Make similar connections for the 24 remaining channels Figure 5 Thermocouple Calibrator to TB 4353 Connections Ojo fe NATIONAL einstavMenrs C Cc X O OIN sae N1414 5 AE OTR zii F E TESIS SH tle i Ta sh J E 12 8 O BE Io o MEA OT Ie UG TESIS es ifs x IVa ol 3 8 Tle gt fs TH d 2 12 ls Ths 1 g sh z A Si 6 Te a V ys ah Onna a T JDU Tle I lt j ies w O O 0 O Not to Scale 1 TB 4353 2 Barrier Strip Assembly 3 Thermocouple Calibrator 10 ni com NI TB 4353 Calibration Procedure
14. x Help includes information about creating applications that use the NI DAQnmx driver The NI DAQmx C Reference Help includes information about the functions in the driver Calibration Interval National Instruments recommends a calibration interval of one year for the NI TB 4353 You should adjust the recommended calibration interval based on the measurement accuracy demands of your application 2 ni com NI TB 4353 Calibration Procedure Test Equipment National Instruments recommends that you use the instruments in Table 1 for calibrating an NI PXIe 4353 module Table 1 Recommended Equipment Equipment Recommended Model Requirements Thermocouple Ectron 1140A If this instrument is unavailable use a high Calibrator precision thermocouple source with an accuracy of at least 0 08 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 Thermocouple Omega P N SMP W E M E type must fit the output terminal of the Connector thermocouple calibrator Thermocouple Barrier Omega P N BS16A x4 32 channels Strips Thermocouple Barrier Omega P N BSJ E x6 E type 32 channels Strip Jackets 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 A
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