Manuale d’uso / di manutenzione del prodotto 5626/5628 del fabbricante Fluke
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5626/5628 Platinum Resistance Thermometer User’ s Guide Rev. 532801 Hart Scientific.
Rev. 532801 Fluke Hart Scientific • 799 E. Utah Valley Drive • American Fork, UT 84003-9775 • USA Phone: +1.801.763.1600 • Telefax: +1.801.763.1010 • E-mail: support@ hartscientific.com www.hartscientific.com Subject to change without notice.
T able of Contents 1 Befor e Y ou Start . . . . . . . . . . . . . . . . . . . . . . 1 1 . 1 Symbols Used . . . . . . . . . . . . . . . . . . . . . . . . . 1 1 .2 Safety Information . . . . . . . . . . . . . . . . . . . . . . . 2 1 .2. 1 W arnings . . .
7 . 1 Case Options . . . . . . . . . . . . . . . . . . . . . . . . . 1 5 7 .2 P RT T ermination . . . . . . . . . . . . . . . . . . . . . . . 1 5 8 Tr oubleshooting . . . . . . . . . . . . . . . . . . . . . 1 7 8. 1 Troubleshooting . . . . . . . . . .
iii Figures Figure 1 Hart Model 5626 and 5628 Platinum Resistance Thermometers . . . . . . 5 Figure 2 Standard Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Figure 3 PRT Schematic . . . . . . . . . . . . . . . . . . . . . . . . .
iv T ables T able 1 International Electrical Symb ols . . . . . . . . . . . . . . . . . . . . . . 1 T able 2 Specifications . . . . . . . . . . . . . .
1 Before Y ou Start 1.1 Symbols Used T able 1 lists the Inter national Electrical Symbols . Some or all of these sym - bols may be used on the instrument or in this manual.
Symbol Description Canadian Standards Association OVE RVOL T AG E (Installation) C A TE G ORY I I, Pollution Degree 2 per I E C 1010 - 1 r e f e r s t o t h e l e v e l o f I m p u l s e W i t h s t a n d V o l t a g e p r o t e c t i o n provided .
• DO N OT drop or bang the probe in any way . This w ill cause damage to the probe internally and affect its calibration. • Read Section 5 entitled “PRT Care and Handling Guidelines” before re - moving the P RT from the shipping box or case. Incorrect handling can damage the PRT and void the warranty .
Phone: +86-1 0-6-5 1 2-3436 T elefax: +86-1 0-6-5 1 2-343 7 E-mail: xing ye.han@fluke.com .cn Fluke South East Asia Pte Ltd . Fluke AS EAN Reg ional Office Serv ice Center 60 Alexandra T errace #03-1 6 The Comtech (Lobby D) 1 1 8502 S INGAPORE Phone: +65 6 799-5588 T elefax: +65 6 7 99-5588 E-mail: antng@singa .
2 Introduction 2.1 General The Hart Platinum Resistance Thermometers (P RT) models 5626 and 5628, are designed to b e the best sec ondary standard interpolating instrument converting temperature to resistance. The P RTs are used with a readout de - vic e to detect temperature changes or actual temperature.
calibrated using a primar y standard that has been calibrated in a primary calibration laborator y using know n intrinsic values . 2.3 Calibration In order for any instrument to be used as a standard it must be calibrated.
3 Specifications and W arranty 3.1 Specifications See T able 2 and Figure 2. 7 3 Specifications and Warranty 5626 5628 Temperature Range –200°C to 661°C R tp 100 Ω ±1 Ω at 0.01°C 25.5 Ω ±0.5 Ω at 0.01°C Resistance RatioW(Ga) W(302.9146K) ≥ 1.
3.2 Construction The Model 5626 and 5628 P RT s cover the range from –200°C to 66 1°C . The sensor elements are crafted using high purity platinum w ire wound in a strain free design on a spec ially designed support . 3.3 Electrical Circuit The PRTs are provided w ith a terminal box handle.
4 Installation 4.1 Environmental Issues Ideally, temperature calibration equipment should be used in a calibration laborator y or other facility spec ifically designed for this purpose.
5 PRT Care and Handling Guidelines 5.1 PRT Care CAUT I O N: R E AD T H I S S E CT I O N B E FO R E RE M OVI N G T H E P RT FR O M T H E S H I P P I N G BOX O R CAS E The 5626 and 5628 Platinum Resistance Thermometers (P RTs) are delicate instruments. Care must b e taken in handling the P RT s to maintain calibra - tion accurac y .
• DO allow sufficient time for the thermometer to stabilize before making measurements. This allows for the best accurac y . • DO use the correct drive current with the thermometer to prevent error in temperature or resistance. Hart Scientific recommends 1mA.
6 Operation 6.1 General F or best results, be familiar w ith the operation of the heat source and the r e a d - o u ti n s t r u m e n t .B es u r et of o l l o wt he manufacturer’s instructions for the read-out instrument and the heat source.
6.4 Thermal EMF Two factors contribute to thermal E M F, chemical c onsistency and physical consistenc y . V ariations in chemical structure due to impurities can contrib - ute to thermal E M F . Also discrepancies in crystal structure can contribute to thermal E M F .
7 Accessories 7.1 Case Options The 5626/5628 PRT comes in a rig id case appropriate for the leng th of the probe. • Model Number 26 0 1 P RT Protective Case for 5626-1 2 and 5628-1 2 PR T • Model Number 26 02 PRT Protective Case for 5626-1 5, 5628-1 5, 5626-20, and 5628-20 PRT 7.
8 T roubleshooting 8.1 T roubleshooting In the event that the probe appears to function abnormally, this section may be of use in solv ing the problem . Several possible problem conditions are described along w ith likely causes and solutions . If a problem arises, please read this section carefully and attempt to understand and solve the problem .
Problem Causes and Solutions Temperature readout differ - ent than expected, e.g. the heat source is set at 300°C, the PRT measures 275°C. • Measure the PRT resistance at TPW. • If the resistance of the PRT is less than the rated resis - tance, e.
Un punto importante, dopo l’acquisto del dispositivo (o anche prima di acquisto) è quello di leggere il manuale. Dobbiamo farlo per diversi motivi semplici:
Se non hai ancora comprato il Fluke 5626/5628 è un buon momento per familiarizzare con i dati di base del prodotto. Prime consultare le pagine iniziali del manuale d’uso, che si trova al di sopra. Dovresti trovare lì i dati tecnici più importanti del Fluke 5626/5628 - in questo modo è possibile verificare se l’apparecchio soddisfa le tue esigenze. Esplorando le pagine segenti del manuali d’uso Fluke 5626/5628 imparerai tutte le caratteristiche del prodotto e le informazioni sul suo funzionamento. Le informazioni sul Fluke 5626/5628 ti aiuteranno sicuramente a prendere una decisione relativa all’acquisto.
In una situazione in cui hai già il Fluke 5626/5628, ma non hai ancora letto il manuale d’uso, dovresti farlo per le ragioni sopra descritte. Saprai quindi se hai correttamente usato le funzioni disponibili, e se hai commesso errori che possono ridurre la durata di vita del Fluke 5626/5628.
Tuttavia, uno dei ruoli più importanti per l’utente svolti dal manuale d’uso è quello di aiutare a risolvere i problemi con il Fluke 5626/5628. Quasi sempre, ci troverai Troubleshooting, cioè i guasti più frequenti e malfunzionamenti del dispositivo Fluke 5626/5628 insieme con le istruzioni su come risolverli. Anche se non si riesci a risolvere il problema, il manuale d’uso ti mostrerà il percorso di ulteriori procedimenti – il contatto con il centro servizio clienti o il servizio più vicino.
