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Fluke 5626/5628 manual

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Table of contents for the manual

  • Page 1

    5626/5628 Platinum Resistance Thermometer User’ s Guide Rev. 532801 Hart Scientific[...]

  • Page 2

    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. • Copyright © 2005 • Printed in USA[...]

  • Page 3

    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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 1 .2.2 Cautions . . . . . . . . . . .[...]

  • Page 4

    7 . 1 Case Options . . . . . . . . . . . . . . . . . . . . . . . . . 1 5 7 .2 P RT T ermination . . . . . . . . . . . . . . . . . . . . . . . 1 5 8 Tr oubleshooting . . . . . . . . . . . . . . . . . . . . . 1 7 8. 1 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . 1 7 ii[...]

  • Page 5

    iii Figures Figure 1 Hart Model 5626 and 5628 Platinum Resistance Thermometers . . . . . . 5 Figure 2 Standard Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Figure 3 PRT Schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Figure 4 Probe T ermination Examples . . . . . . . . . . . . . . . . . . . . . . . [...]

  • Page 6

    iv T ables T able 1 International Electrical Symb ols . . . . . . . . . . . . . . . . . . . . . . 1 T able 2 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7[...]

  • Page 7

    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 AC (Alternating Current) AC-DC Battery C E Complies w ith European Union Directives DC Double Insulated Electric Shock Fuse PE Gr o un d Hot Surface (Bur n Ha[...]

  • Page 8

    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 . Equipment of OV E R VOL T AG E CA T E GO RY II is en ergy-con - suming equipment to be supplied f ro[...]

  • Page 9

    • 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 . • Keep the shipping container in cas[...]

  • Page 10

    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 .fluke.com When contacting these Ser v[...]

  • Page 11

    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. The P RTs cover the International T empera[...]

  • Page 12

    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. The PRTs are calibrated in Hart Scientific's calibration laborator y and pro - vided w ith a N I S T trac eable “Report [...]

  • Page 13

    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) ≥ 1.11807 α ≥ 0.003925 Calibration Uncertainty (k=2) ±0.006°C at –200°C ±0.004°C at 0°C[...]

  • Page 14

    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. T he two meter cable has four Super-Flex w ires enclos[...]

  • Page 15

    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. Environ - mental requirements include: • Stable temperature and relative humidity <80% • Clean, draft-free area • Low noise level: low radio frequenc y, ma[...]

  • Page 16

    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 . The stress free d[...]

  • Page 17

    • 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. • DO anneal the thermometer at 600 to 66 1°C for 1 2 hours if it becomes oxidized. [...]

  • Page 18

    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. 6.2 Comparison Calibration of Other Instruments The uniformity and stability of the heat source and the [...]

  • Page 19

    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 . These factors are minimized by annealing the full length of wire b efore constru[...]

  • Page 20

    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 7.2 PRT T ermination The 5626/5628 PRT can be terminated in three w [...]

  • Page 21

    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 .[...]

  • Page 22

    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.g. 70 Ω for the 5626, there may be a short in the sensor. Contact an Authorized Hart Scientific [...]