TSXMRPF004M

TSXMRPF004M

TSXMRPF004M

TSXMRPF004M

NDIR系統(tǒng)存在的一個主要問題是隨著時間的推移，如何準(zhǔn)確地知道發(fā)送給檢測器的光線變化是否真的因氣體吸收所引起，而不是光源變化或者艙室污染所引起。盡管在NDIR系統(tǒng)工作之初進行校正是可能的，但是為了應(yīng)對隨著時間推移而出現(xiàn)的光源變化和艙室污染問題，要求不斷進行校準(zhǔn)。這樣做成本很高昂、耗費時間，并且在長期現(xiàn)場運行過程中也不可行。解決這個問題的一個方法是，在你的系統(tǒng)中使用一條基準(zhǔn)通道。該基準(zhǔn)通道包含一個檢測器，在沒有光線吸收的范圍內(nèi)測量光源。現(xiàn)在，氣體濃度由兩個發(fā)送光量之比來決定。光源偏差引起的任何誤差現(xiàn)在都被抵消。這種偏差導(dǎo)致長期漂移，其出現(xiàn)在較大的時間段內(nèi)。因此，無需同時對基準(zhǔn)和有源通道進行采樣。你可以使用一個輸入多路復(fù)用器(MUX)來在兩條通道之間切換，從而降低系統(tǒng)成本和復(fù)雜程度，并同時維持度

在NDIR系統(tǒng)中用作紅外檢測器的熱電堆根據(jù)其接收的入射光多少(單位為瓦特)來產(chǎn)生電壓。被測氣體類型、其吸光系數(shù)和氣體濃度范圍都影響熱電堆檢測器的入射光線量。它產(chǎn)生熱電堆輸出電壓(范圍通常為數(shù)十μV)。因此，你需要設(shè)計出具有使用不同增益放大熱電堆輸出電壓功能的電子支持組件?？梢酝ㄟ^一個含內(nèi)置PGA的模擬前端(AFE)來處理這種情況。要求使用數(shù)百到數(shù)千V/V范圍的增益設(shè)置，來把小熱電堆信號放大到系統(tǒng)全刻度模數(shù)轉(zhuǎn)換器(ADC)，從而實現(xiàn)大系統(tǒng)度。

Verifone Vx570 Dial 6meg PCI DSS Credit Card Terminal

VEKTRONICS 200014 NSPP 200014

Value upgrade kit w/Onboard Videoaudio|550W|Elite Case

UST US TSUBAKI TSB50 SHOCK RELAY 0.3-3S 115/230VAC

Uson Corporation 403X300 Unson Corporation 403-x300 I/O Module 403x300 

Uson Corp I/O Module 403-X300G 403-X300G

USON CORP 403-X300J Uson Corp 403 X300J 403X300J I/O Module 

USON CORP 403-X300H USPP 403X300H

USON CORP 403-X300H NSFP 403X300H

USON CORP 401-X300F USPP 401X300F

USON 403-X300G USPP 403X300G

USON 403X300 REMAN. I/O MODULE 403-X300

Uryu Seisaku I/O Control Unit Module Card UEC-E200MD

Uryu Seisaku I/O Control Unit Module Card UEC-E200 I/0

uPLC01 PLC with CANopen DeviceNet EtherNet/IP Modbus

UPGRADED CISCO1841-HSEC/K9 ROUTER WITH 1YR  1841-HSEC/K9

UPGRADED CISCO1841-HSEC/K9 ROUTER WITH 1YR  1841-HSEC/K9

Unisphere Juniper T3 Frame T3-3F ERX-700 ERX-1400 Mod

Unisphere Juniper ERX1400 SRP-10-ECC 10-Gbps SRP module  Make Offer

Unisphere Juniper CT1-Full CT1_I/O ERX 1400 90   Free Overnight Ship

Unisphere  Juniper  ERX 1400 Base 14 Chassis 90  

UNIPRO 24002156 USPP 24002156

UNICO 704-476  CONVERTER I/O MODULE 704476

UNICO 306-563 USPP 306563

Unico 306-563 306563 I/O Parallel Interface Module 

Under valid Lenovo factory  until 2015-03-31

Under valid Lenovo factory  until 2015-03-31

UC520W-8U-4FXO-K9 8U CISCO CME BASE CUE AND PHONE FL W/4FXO 1VIC WIFI

UC520W-8U-4FXO-K9 8U CISCO CME BASE CUE AND PHONE FL W/4FXO 1VIC WIFI

UC520W-8U-4FXO-K9 8U CISCO CME BASE CUE AND PHONE FL W/4FXO 1VIC WIFI

UC520-16U-4FXO-K9 CISCO 16U CME BASE CUE  PHONE FL W/4FXO 1VIC

UC520-16U-4FXO-K9 CISCO 16U CME BASE CUE  PHONE FL W/4FXO 1VIC

UBR7246VXR CISCO UBR 7246 4MC  2PA SLOTS 1YR - ASK 4 QTY

UBR7246VXR CISCO UBR 7246 4MC  2PA SLOTS 1YR - ASK 4 QTY

UBR7200-NPE-G1 CISCO UBR NPEG1 ENGINE W/ 512MB D/64MB F 3 GE/FE/E

UBR7200-NPE-G1 CISCO UBR NPEG1 ENGINE W/ 512MB D/64MB F 3 GE/FE/E

UBR7200-NPE-G1 CISCO UBR NPEG1 ENGINE W/ 512MB D/64MB F 3 GE/FE/E

UBR7200-NPE-G1 CISCO UBR NPEG1 ENGINE W/ 512MB D/64MB F 3 GE/FE/E

UBR7200-NPE-G1 CISCO UBR NPEG1 ENGINE W/ 512MB D/64MB F 3 GE/FE/E

U6180-60001 HP Printer Maintenance Kit 2300 U6180-60001 

TYAN TRANSPORT VX50 B4985 Thunder n4250QE S4985 OPTERON Barebone B4985V50V4H-4P

TYAN TRANSPORT VX50 5U 8xAMD Optreon 865 16GB 4TB 9550SX RAID Storage Server

Tyan Thunder S2891G2NR Dual Opteron K8SRE DDR400 2xG

TYAN THUNDER N6550EX S4989 S4989-SI AMD QUAD SKT 1207 SERVER BOARD S4989WG2NR-SI

TYAN THUNDER N6550EX S4989 S4989-LE AMD QUAD 1207 SERVER BOARD S4989WG2NR-LE

Tyan Thunder K8QS Pro S4882 4-way Opteron platform Motherboard 4x Opteron 880 

TYAN Tempest i5000PX S5380 Intel Socket 771 Server MOTHERBOARD S5380G2NR

Tyan S8236GM3NR-IL Socket G34 AMD SR5690/SP5100 Chipset EEB Motherboard

Tyan S8236GM3NR-IL Socket G34 AMD SR5690/SP5100 Chipset EEB Motherboard

Tyan S8236GM3NR-IL Socket G34 AMD SR5690/SP5100 Chipset EEB Motherboard

Tyan S4882UG2NR Thunder K8QS Pro MB Refurbished

Tyan S2882UG3NR K8S Pro Dual S940 MB Refurbished

TYAN S2882 THUNDER K8S PRO S2882G3NR DUO OPTERON AMD-8131 CHIPSET 8 DDR SLOT

TYAN S2881 THUNDER K8SR S2881G2NR DUO OPTERON AMD-8131 CHIPSET 8 DDR SLOT

TYAN S2880 THUNDER K8S S2880UGNR. DUO SOCKET 940 AMD-8131 CHIPSET ON BOARD SCSI

Tyan S2721UGN-533 i7501 Pro Dual Xeon MB Refurbished

T-Win XJ2000-4483 SAS/SATA JBOD Storage System 4U 24-bay  for 48 Drives 

TWDLMDA40DUK extendable PLC base Twido 24 V 24 I 24 V DC 16 O solid state

TV One C2-8260 Corio2 DVI-U/3G/HD/SD-SDIAudio Switcher

TV One C2-8210 Corio2 DVI-U/3G/HD/SD-SDI Switcher

TV One C2-8160 Corio2 10x2 DVI-U Aud Seamless Switcher

TV One C2-8130 Corio2 12x2 DVI-U Seamless Switcher

TV One C2-8120 Corio2 8x2 DVI-U Seamless Switcher

TV One C2-8110 Corio2 6x2 DVI-U Seamless Switcher

TV One C2-6204 CORIOview 4-Window 3G-SDI Processor

TV One C2-6104A CORIOview 4-Window DVI-U Processor

TV One C2-2375A CORIO2 CV/DVI/3G-SDI Converter

TSXSCY21601 TESTED Modicon Premium 485MP TSX-SCY-216-01

TSXSCY21601 Modicon Premium 485 MP TSX-SCY-216-01

TSXSCY21600 Modicon Premium 485 MP TSX-SCY-21600

TSXSAY1000  Modicon Premium BUS Coupler Module TSX-SAY-1000 TSX57-A2S-I

TSXSAY100  Modicon Premium AS I Module TSX SAY 100

TSXIBY100 Modicon Premium TSX-IBY-100

TSXETY5102  Modicon Premium TSX57 10/100 FCAST MOD TSX-ETY-5102

TSXETY110  Modicon Premium TCP/IP TSX-ETY-110

TSXDSY32T2K Modicon Premium Output TSX-DSY-32T2K

TSXDSY32T2K Modicon Premium Output TSX-DSY-32T2K

TSXDMZ28DT TESTED Modicon Micro Combination Module TSX-DMZ-28DT

TSXDMZ28AR TESTED Modicon Micro Input Module TSX-DMZ-28AR

TSXDEY32D2K Modicon Premium Digital Input TSX DEY 32D2K

TSXDEY32D2K Modicon Premium Digital Input TSX DEY 32D2K

TSXDEY16A5 PREMIUM INPUT MODULE TSX-DEY-16A5

TSXDET3232 Modicon Premium 24 VDC Input TSX-DET-3232

TSXDET1604 Modicon Premium 110/115 VAC Input TSX-DET-1604

TSXCUSBMBP Modicon Premium Modbus Plus Converter TSX-CUS-BMBP

TSXCTZ1A Modicon Micro 1 Channel Counter Module TSX-CTZ-1A

TSXCAY42 Modicon Premium Analog Motion Module TSX-CAY-42

TSXASZ401 TESTED Modicon Micro Analog Output Module TSX-ASZ-401