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Table of contents for the manual
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® 51, 52, 53, 54 Series II Thermometer Service Manual PN 1276123 October 199 9 © 1999 Fluke Corporation. All rights reserved. Printed in USA All product names a re trademarks of th eir r especti ve c omp anies.[...]
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LIMITED W ARRANTY & LIMI TATION OF LIABILITY Each Fluke product is warranted to be free from defects in mat eri al and workmans hip under normal use and service. The warranty peri od is three y ears and begins on the date of shipment. Parts, product repairs and services are warrant ed for 90 days. This warranty extends only to the original buye[...]
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i Table of Contents Title Page Introducti on ....................................................................................................... 1 Service Cente rs .................................................................................................. 2 Internati onal Sym bols .........................................................[...]
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51, 52, 53, 54 Series II Service M anual ii[...]
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iii List of Tables Table Tit le Page 1. Internati onal Elect rical Sy m bols Used in this M anual........................................... 2 2. Recommended Test E quipm ent ............................................................................. 5 3. Perform ance Test Values (K- Type Therm ocouple) ...........................................[...]
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51, 52, 53, 54 Series II Service M anual iv[...]
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v List of Figures Figure Title Page 1. Display Segm ents .................................................................................................. 6 2. Ice Bath Test E quipment Con nectio ns ................................................................... 7 3. Calibratio n Connections ....................................................[...]
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51, 52, 53, 54 Series II Service M anual vi[...]
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1 51, 52, 53, 54 Series II Service Manual W Warning To avoid shock or injury, do not perform the performance tests or calibration procedures described in this manual unless you are qualified to do so. Refer to the Safety Informa tion section of this manual before using the Fluke 51, 52 , 53, 54 Series II Thermometers . Caution The Fluke 51, 52, 53,[...]
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51, 52, 53, 54 Se r ies II Service M anual 2 Serv ice Ce nt ers To contact Fluk e, order parts, or locate a Fluke s ervice cente r, call one of th e following telephone nu mbers: USA: 1-888-99-FLUKE (1-8 88-993-5 853) Canada: 1-800-3 6-FLUKE (1-800 -363-5853 ) Europe: +31 402 -678-200 Japan: +81 -3-3434-0181 Singapore: +65 -738-565 5 Anywhere in th[...]
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Thermometer Precaut ion s and Saf et y Informatio n 3 Safety Informa tion W Warning To avoid electri cal shock or pe rsonal injury, follow t hese guidelines: • Before using the t hermometer, inspect the case. Do not us e the thermometer if it appears d amaged. Look for cra cks or missing plastic. Pay particular attention to the insulation a round[...]
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51, 52, 53, 54 Se r ies II Service M anual 4 Specifi catio ns General Specifications Weight 280 g (10 oz) Dimensions (without ho lster) 2.8 cm × 7.8 c m × 16.2 cm (1.1 in × 3 i n × 6.4 in) Battery 3 AA batteries Certification P , ) (TÜ V pending) Safety CSA C22.2 No. 101 0.1 1992 EN 61010 Amendm ents 1, 2 CAT I OVERVOLTAGE (Installation) CATEG[...]
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Thermometer Perform ance Test and Calibr ation Requ ired Test Equipme nt 5 Perfor mance Test and Calibration Re quired Test Equipment Refer to T able 2 fo r a li st of tes t equip ment us ed in the pe rform ance te st and c alibration procedures. Table 2. Recommended Test Equipment Equipment Required Characterist ics Recommended M odel DC Voltage C[...]
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51, 52, 53, 54 Se r ies II Service M anual 6 52 51 54 53 zb03f.eps Figure 1. Display Seg ments Keypad Test Check that all key pad swit ches ar e functiona l by pre ssing each k ey and confirm ing the proper respon se on th e display. Wide Range Performance Tes t Procedure This tes t verifi es the instrumen t spec ificatio ns. If the ins trumen t fa[...]
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Thermometer Pe rfo rmanc e T ests 7 4. Replace th e Dewar Flask c ap or co rk, and in sert the ther mocoup le wires and Mercur y thermo mete r as shown in Figu re 2. In sert the Mercu ry th ermo meter to the sa me depth as the th ermocoupl e wire. 5700A Calibrator Ice bath K-T ype Thermocouple wire Copper wire 51, 52, 53, or 54 Series II Thermomete[...]
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51, 52, 53, 54 Se r ies II Service M anual 8 Table 3. Performance Test Values (K-Typ e Ther mocouple) Input Voltage Equivalent Display Reading limits Step (mV DC) Temperature ° C ° F 1 0.0000 0.0 ° C 32.0 ° F -0.3 to 0. 3 31.5 to 32.5 2 0.9193 23.0 ° C 73.4 ° F 22.7 to 23.3 72.9 to 73.9 3 -5.7297 -190.0 ° C -310.0 ° F -189.3 to - 190.7 -308[...]
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Thermometer Calibrat ion and Offs et Adjus tment 9 Calibrati on a nd Offset Adjust ment Calibra tion consis ts of tw o parts : 1. Calibra tion of the A/D conv erter, using the s et up shown in F igure 3. 2. Reference jun ction calibr ation, usin g the i ce bath test set up shown in F igure 2. A/D Calibr ati on To calibr ate the A /D port ion of th [...]
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51, 52, 53, 54 Se r ies II Service M anual 10 Calibration button access zb02f.eps Figure 4. Calibration Button Access 3. The menu on the displa y changes to “ CAL A-d ”. Note Within CAL are four menu op tions that may be acc essed by pressing E : • CAL A-d prompts the opera tor fo r the A/D calibrati on inputs in mV dc. • CAL rEF allows the[...]
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Thermometer Calibrat ion and Offs et Adjus tment 11 11. To ignore the calibrat ion chang es, use K or N , and selec t “ CAL Abrt ” and press E. 12. Proceed to Refe rence J unction Calibration. Reference Junction Calibration Note This procedure is desc ribed u sing an ice ba th and a K-ty pe th ermocouple. It can be per formed in ° C, ° F, or [...]
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51, 52, 53, 54 Se r ies II Service M anual 12 Basi c Ma intenance Basic main tenan ce requ ired by the therm om ete r is discussed in this section. Cleaning the Thermo meter Caution • To avoid damaging the thermo meter, do not use aromatic hydrocarbons or chlorinated solven ts for cleaning. These solutions react with the plastics used i n the the[...]
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Thermometer Disa ssem bly and Reass emb ly 13 zb01f.eps Figure 5. Battery Acces s Disassemb ly an d Re assembly Disasse mbly and reasse mbly o f the th ermomet er may be neces sary t o repla ce inter ior parts. Refer to Figu re 6 when disas sembling and reassem bling the therm ometer. Disassembly To disassemb le the therm om ete r, fol low these st[...]
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51, 52, 53, 54 Se r ies II Service M anual 14 6. The LCD decal is now e xposed and ma y be re moved. 7. To remove the main switch pad, fir st re move the smal l elas to mer ic connecto r at the top of th e switch pad, and then lift o ut the entire sw itch pad. Reassembly The reassemb ly proc edure is basical ly the reve rse of the disa ssemb ly pro[...]
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Thermometer Replaceab le Part s 15 5. Push the Isoth erma l PCA and the Main PC A to gether so t hat th e Isoth ermal PCA pins go dee per in to the M ain PCA sockets. This ho lds the IR Lens in p lace and allows th e Main PCA to be r einsta lled in to the top case. Reinstalling the Main PCA 1. While hold ing the IR L ens to the Main PCA, tu rn the [...]
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51, 52, 53, 54 Ser ies II Service M anual 16 Table 4. Repl aceable P arts (cont.) Item Number Q ty. Fluke Part Number Description Model Number 9A-B 1 1 1541912 1543462 51/53 SERIES II IR LENS KIT 52/54 SERIES II IR LENS KIT IR Lens Kit con tains: 51, 53 52, 54 9A 2 4 __ • SPRIN G, ISOTH ERMAL 51, 53 52, 54 9B 1 1 __ • IR L ENS • IR L ENS 51, [...]
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Thermometer Replaceab le Part s 17 13 4 3 1 8A 2 8D 8F 14 8C 8B 15 17 11 9A 9B 6 10 5 16 7 12 8E zb07f.eps Figure 6. Exploded Vi ew (Model 54 is Shown)[...]
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51, 52, 53, 54 Ser ies II Service M anual 18[...]
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1 Index —A— assembly, 1 3 —B— batteries access to, 13 chan gi ng, 1 2 —C— calibration, 9 A/D , 9 A/D connections, 9 button access, 10 CAL Abrt , 10 CAL A- d, 10 CAL donE, 10 CAL rEF, 10 offset, 9 reference ju nction, 11 variations between therm ocouples, 11 caution , 12, 13 CD ROM, 1 —D— disasse mb ly, 13 display segments, 6 —E—[...]
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51, 52, 53, 54 Series II Service M anual 2 —S— safety, 2 cautions and warn ings, 3 service centers phone num ber s, world wide w eb address , 2 specifications electrical, 4 environmental, 4 genera l, 4 —T— test equipment performance testing a nd calibration, 5 —U— Users Manual 51, 52 Series II, 1 53, 54 Series II, 1 —W— warnings , 1[...]