National InstrumentsメーカーFP-RTD-122の使用説明書/サービス説明書
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323348B-01 April 2003 © 2002–2003 Nat ional Instr uments Corp. All ri ghts reserved. FieldPoint ™, National Instruments ™, NI™, and ni. com™ are tradema rks of National I nstruments Cor poration. Produc t and com pany n ames m entioned herein are trad emar ks or trad e names o f their respecti ve com panies .
FP-RTD-122 and cFP-RTD-122 2 ni.com Installing th e FP-RTD-122 The FP-R TD-122 mounts on a Fie ldPoi nt termin al base (FP-TB - x ), which pro vides operating po wer to the module. Inst alling th e FP-R TD-122 onto a po wered termin al base do es not disru pt the opera tion of the ba nk.
© National Instruments Corp. 3 FP-RTD-122 and cFP-RTD-122 T o install the cFP -R TD-122, refer to Figure 2 and complete the follo wing steps: 1. Alig n the captive screws on the cFP-RTD-122 with the hol es on the bac kplane. The ali gnment keys on the cFP- R TD-12 2 prev ent backward ins ertion.
FP-RTD-122 and cFP-RTD-122 4 ni.com Wiring the [c]FP-R TD-122 The FP-TB- x terminal bases have connection s for each o f the eight input c hannels on the FP-R T D-122. Th e cFP-CB- x co nnector blocks pr ovide the same connect ions for t he cFP-R TD-122.
© National Instruments Corp. 5 FP-RTD-122 and cFP-RTD-122 Figure 3 . [c]F P-RTD-122 Inpu t Circuitry T aking Measurements from Three-Wire R TDs Three-wire R TDs often ha ve a wire of one color (usually white, sometimes re d) for po siti ve e xcitation, and tw o wires of another color (usually red, sometim es black).
FP-RTD-122 and cFP-RTD-122 6 ni.com Figure 5. Fou r -Wire RTD Connection s on One Channel T aking Measurements from T wo-Wire R TDs Connect eith er wire of a two-wire R TD to the EX+ terminal and the other wire to the COM term inal, and co nnect a sho rt jumper wire between th e COM and SENSE terminals.
© National Instruments Corp. 7 FP-RTD-122 and cFP-RTD-122 Converting Resistance M easurements to T emperatu re Measureme nts The [c]FP -R TD-122 has b uilt-in line arization algo rithms for platinu m R TDs of ei ther 100 or 1,00 0 Ω no minal resista nce, and for si x TCR (or a lpha, α ) values.
FP-RTD-122 and cFP-RTD-122 8 ni.com The [c]FP-R TD-122 uses a l inearizati on curve known as the Callendar-V an Dusen equat ion to measur e the temperature of R TDs.
© National Instruments Corp. 9 FP-RTD-122 and cFP-RTD-122 ef fects of th e lea ds. The only residua l error s ar e tho se ca us ed b y mismatchi ng the EX+ and COM lead s. Most R TDs have lead resistances wi thin 5% of each ot her, so the com pensation of the [c]FP-R TD-122 corrects for 95% or more of the errors introduced by lead resistanc es.
FP-RTD-122 and cFP-RTD-122 10 ni.com Upgradin g the FieldPoi nt Firmw are Y ou may need t o upgra de the Fiel dPoin t firmware when y ou add new I/O module s to the Fi eldPo int syst em. For inf ormat ion on deter mining which f irmwar e you need an d ho w to upgr ade you r firmware, go to ni.
© National Instruments Corp. 11 FP-RTD-122 and cFP-RTD-122 • Oper ate the [c]FP -R TD-122 only at or belo w Pollution Degree 2. Po llut ion Degree 2 mea ns tha t only no ncon ductive pollu tion oc curs in most case s. Occasion ally , howe ver , a tempor ary cond uctivity caused by con densati on must be expected.
FP-RTD-122 and cFP-RTD-122 12 ni.com Offset error , 4,00 0 Ω range 15 to 35 °C ......... ............... ... 0.2 Ω ty p, 0. 7 Ω ma x – 40 to 70 °C .............. ........... 0.8 Ω typ, 4.0 Ω ma x Gain error 15 to 35 °C ............. ...
© National Instruments Corp. 13 FP-RTD-122 and cFP-RTD-122 Maximum altitud e ........... ........... ....... 2,000 m; a t higher a ltitude s the isolat ion v oltage r atings must be lowered Pollutio n De gree ......... ....... ........... ... 2 Shock an d Vibratio n Thes e speci fic ations apply on ly to the cFP -R TD- 122.
FP-RTD-122 and cFP-RTD-122 14 ni.com CE Complia nce This produ ct meets the essential re quirements of applicab le European Direct iv es, as amended for CE Mark ing, as follows: Lo w-V oltage Dire cti ve (safety)......... 73/23 /EEC Electrom agnetic Compati bility Directi ve (EMC ) .
© National Instruments Corp. 15 FP-RTD-122 and cFP-RTD-122 Go to ni.com/support for the most current m anuals, example s, and t rouble shootin g info rmati on. For telephone supp ort in the United States, crea te your service request at ni.com/ask and follow the calling instructions or dial 512 795 8248.
デバイスNational Instruments FP-RTD-122の購入後に（又は購入する前であっても）重要なポイントは、説明書をよく読むことです。その単純な理由はいくつかあります：
National Instruments FP-RTD-122をまだ購入していないなら、この製品の基本情報を理解する良い機会です。まずは上にある説明書の最初のページをご覧ください。そこにはNational Instruments FP-RTD-122の技術情報の概要が記載されているはずです。デバイスがあなたのニーズを満たすかどうかは、ここで確認しましょう。National Instruments FP-RTD-122の取扱説明書の次のページをよく読むことにより、製品の全機能やその取り扱いに関する情報を知ることができます。National Instruments FP-RTD-122で得られた情報は、きっとあなたの購入の決断を手助けしてくれることでしょう。
National Instruments FP-RTD-122を既にお持ちだが、まだ読んでいない場合は、上記の理由によりそれを行うべきです。そうすることにより機能を適切に使用しているか、又はNational Instruments FP-RTD-122の不適切な取り扱いによりその寿命を短くする危険を犯していないかどうかを知ることができます。
ですが、ユーザガイドが果たす重要な役割の一つは、National Instruments FP-RTD-122に関する問題の解決を支援することです。そこにはほとんどの場合、トラブルシューティング、すなわちNational Instruments FP-RTD-122デバイスで最もよく起こりうる故障・不良とそれらの対処法についてのアドバイスを見つけることができるはずです。たとえ問題を解決できなかった場合でも、説明書にはカスタマー・サービスセンター又は最寄りのサービスセンターへの問い合わせ先等、次の対処法についての指示があるはずです。
