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Fluke 50D manual

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Table of contents for the manual

  • Page 1

    PN 1281009 October 1999 Rev.1, 3/ 03 ©1999- 2003 Fl uke C orporati on. All rig hts reserv ed. P rinted in U.S .A. All produc t nam es are tr adem arks of their res pecti ve compa nies. 1 50S & 50D Thermometer Calibration Informa tion W Warning These service instructions are fo r use by qua lified personnel only. To avoid electric shock, do not[...]

  • Page 2

    50S & 50D Thermomete r Calibration In formati on 2 In t e r n a t ion a l S y mbols Table 1 id entif ies the in ternat ional elect rical symbol s used in this d ocu ment. Table 1. Int ernational Electrical Symbols Used in t his Document N Low Battery Important informat ion Complies w ith relev ant Cana dian Standards Assoc iation direc tives Co[...]

  • Page 3

    Spec i ficat ions 3 Sp ecif i c a ti on s G ener a l Weight 280 g (10 oz) Dimensions (without hols ter) 2.8 cm × 7.5 c m × 16.6 cm (1.1 in × 3 i n × 6.6 in) Battery Standard 9 V battery (NEDA 1604, 6F22, or 006P) Protection Class III as defined in IEC 348, S afety Requirem ents for Elec tronic Appar atus Env i ronme n t a l Operating Tem peratu[...]

  • Page 4

    50S & 50D Thermomete r Calibration In formati on 4 Clean the thermo mete r case w ith a m ild de tergen t and wate r. The pca may be w ashed w ith iso propy l alcohol o r deion ozed wa ter and a soft brush. D ry the pca w ith clean dry air at low pressu re, the n bake it a t 50 o C for 24 hours. D i sassem b l y / Reass e m b l y Thermomet er d[...]

  • Page 5

    Basic Ma intena nce 5 Chang i ng t h e Bat t ery W Warning • Replace the battery as soon as the low battery indicator ( N ) a ppears. The possibility of false readings increases when the battery is not fully charged. False readings can lead to personal injury. • To avoid electrical shock, disconnect the thermocouple (s) before opening the case.[...]

  • Page 6

    50S & 50D Thermomete r Calibration In formati on 6 R e qui r e d T e s t Equipm e nt Table 2 list s the requ ired tes t equipm ent need ed to pe rform the perfo rmance test and ca libra tion proced ures for the 5 0S and 50D th ermo meters. I f the requi red equ ipment is not ava ilable, inst ruments wi th equivalen t specifica tions may be us e[...]

  • Page 7

    Perform ance Test s 7 K J MAX MIN HOLD REC C F 50S Display 50D Display - + T1 T2 T1-T2 K J HOLD C F - + zf03f. eps Figure 3. Display Seg ments W i d e Range Pe r f o r manc e Test Procedure This tes t veri fies the instrum ent sp ecif icatio ns. If the ins trumen t fails this tes t, perfor m the calib ration procedure. If the un it cont inutes to f[...]

  • Page 8

    50S & 50D Thermomete r Calibration In formati on 8 5520A Ice bath Thermocouple wire 50S or 50D Thermometer + _ Copper wire zf05f. eps Figure 4. Ice B ath Equipment Conne ctions Ic e B a t h T e st Use the fo llowing p rocedure to test the the rmomete r. This test sh ould be co nducted o n both th ermoc ouple inputs o f the 50D. 1. Connect the e[...]

  • Page 9

    Calibration 9 Table 3. Performance Test Values Thermocouple Input Voltage Display Reading Type (mV DC) o C o F K -5.587 -182.0 ± (0.9) -295.6 ± (1.6 ) K -3.211 -89.0 ± (0.8) - 128.2 ± (1. 4) K 21.919 530.0 ± (1.2) 986.0 ± (2.3 ) K 54.297 1355.0 ± (2.1) 2471.0 ± (3.8) J -7.824 -197.0 ± (1.0) -322.6 ± (1.7 ) J 13.997 258.0 ± (1.1) 496.4 ±[...]

  • Page 10

    50S & 50D Thermomete r Calibration In formati on 10 position unt il th e display i s locked in self-t est (all LCD segm ents on). Thi s ther mometer is now in the Reference Jun ction Sen sor ca libra tion mo de. Shorting o ut the V IEW sw itch grid turns o ff a fi lter so t hat the reading sta bi liz es im med ia tely. 13. Using the 80T -150U a[...]

  • Page 11

    Calibration 11 FLUKE 52-1601 zf09f. eps Figure 6. A1 Main PCA Adjus tments O pt i m i z i ng Th e rm o me t e r Pe r f o r mance i n t h e Negat i ve T e mper a t ur e Range Perfor m the fo llow ing step s to op timize the the rmome ter pe rform ance in the nega tive t emper ature ran ge: 1. Put the th ermome ter in n orma l operating mode. Nor mal[...]

  • Page 12

    50S & 50D Thermomete r Calibration In formati on 12 5. Allow th e system to stab ilize, then ad just T1 o r T2 offse t adjus tments fo r a te mperature display equ al to the read ing of the lag bath refer ence the rmomet er. 6. Calibra tion of the the rmome ters is com plete. D isconnec t all test e quipme nt fro m the instru ment. Lag bath (ro[...]

  • Page 13

    Replaceab le Par ts 13 R e p la c ea b l e P a rts Refer to T able 4 for a ll rep lacem ent part nu mbers and Figure 8 for par t location s. Unless specifie d in the “Model Nu mber” co lumn, a ll parts are fo r all u nits. To orde r replace able pa rts, se e the “Ser vice Cen ters” section of this manua l. Table 4. 50S and 50D Replace able [...]

  • Page 14

    50S & 50D Thermomete r Calibration In formati on 14 15 6 10 1 12 7 13 3 11 8 16 9 2X 4X 4X 4X 2 4 5 zf08f. eps Figure 8. Exploded Vi ew Diagram (Mod el 50D is Shown)[...]