Instruction/ maintenance manual of the product 52 Fluke
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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.
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.
i Table of Contents Title Page Introducti on ....................................................................................................... 1 Service Cente rs ...................................................................................
51, 52, 53, 54 Series II Service M anual ii.
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 ............................................................................
51, 52, 53, 54 Series II Service M anual iv.
v List of Figures Figure Title Page 1. Display Segm ents .................................................................................................. 6 2. Ice Bath Test E quipment Con nectio ns ...................................................
51, 52, 53, 54 Series II Service M anual vi.
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 .
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 (.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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 52/5.
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).
51, 52, 53, 54 Ser ies II Service M anual 18.
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 of.
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.
An important point after buying a device Fluke 52 (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Fluke 52 yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Fluke 52 - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Fluke 52 you will learn all the available features of the product, as well as information on its operation. The information that you get Fluke 52 will certainly help you make a decision on the purchase.
If you already are a holder of Fluke 52, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Fluke 52.
However, one of the most important roles played by the user manual is to help in solving problems with Fluke 52. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Fluke 52 along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
