Lakeshore DRC-70 Скачать руководство пользователя страница 66

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Содержание DRC-70

Страница 1: ...r Website www lakeshore com Fax 614 891 1392 Telephone 614 891 2243 Methods and apparatus disclosed and described herein have been developed solely on company funds of Lake Shore Cryotronics Inc No go...

Страница 2: ...ewise shall not apply to any instrument or component not manufactured by others and included in Lake Shore Cryo tronics Inc equipment the original manufacturer s warran ty is extended to Lake Shore Cr...

Страница 3: ...1 Introduction 9 3 2 Controls I n d i c a t o r s Connectors 9 3 3 Temperature Readout 15 3 3 1 Remote P a r a l l e l BCD Input Output Option 15 3 4 Standard DT 500 DRC and DT 500CU DRC 36 Curves 16...

Страница 4: ...2 BCD Temperature Output Remote I 0 17 Table 3 3 DT 500 DRC Voltage Temperature C h a r a c t e r i s t i c 18 Figure 4 1 Block Diagram of DRC 70 22 Figure 4 2 Block Diagram of DRC 70C 23 Figure 4 3 F...

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Страница 7: ...t e r over t h i s temperature range The instruments however a r e useful t o 1 K although t h e accuracy i s not guaranteed below 4 K Pre selection allows t h e DRC 7 70 series t o be used with t h e...

Страница 8: ...in The DRC 7C has 1 degree r e s o l u t i o n and c o n t r o l s t o 1 kelvin Conformity t o a standard DRC curve i s b e t t e r than 0 5 kelvin over t h e temperature range from 4 0 t o 380 K The...

Страница 9: ...o r a t e d accuracy outputs Analog Standard Monitor output of sensor v o l t a g e Analog Optional 10mV K a t 10 ohm output impedance D i g i t a l Optional TTL compatible p a r a l l e l BCD Tempera...

Страница 10: ...voltage with diode temperature ation See sensor data sheet for additional inform E Custom Modification of Sensor Current Supply Value F Analog of Temperature 10mV Kis standard G TTL Compatible Parall...

Страница 11: ...i n d i c a t e s t h a t a B sensor must be s p e c i f i e d e g DT 500 DRC B both t h e BCD and analog of temperature option are on t h i s instrument The BCD L A i n d i c a t e s t h a t C The t...

Страница 12: ...re connecting the power cable to the line ensure that the line voltage selector switch 115 V or 230 V is in the appropriate position for the line voltage to be used Examine the power line fuse to ensu...

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Страница 14: ...n the malfunction is elsewhere If it is indicated that the fault is in the instrument after these tests the repre sentative will send shipping instructions and labels for returning it He may be able t...

Страница 15: ...leaders t o various controls i n t h e f i g u r e s are keyed t o the e n t r i e s i n Table 3 1 Table 3 1 Entry Number Correlation NO KEY NAME FUNCTION 1 NO LABEL Digital temperature display locat...

Страница 16: ...s Key 3 15 NO LABEL D i g i t a l set point Has 1 K r e s o l u t i o n 1 6 75ASB 115 V Same as Key 5 17 115 230 V Same as Key 4 18 HI LO Limits maximum power t o 50 w a t t s HI 1 9 Heater Heater ele...

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Страница 21: ...with values l i s t e d i n the t a b l e within the accuracy of t h e system consult sections on i n s t a l l a t i o n and or section on troubleshooting t o determine the cause and cure of t h e m...

Страница 22: ...ltage across t h e 100 K r e s i s t o r can be adjusted by varying r e s i s t o r R12 see component p o s i t i o n diagram Figure 6 4 u n t i l correct reading is achieved The A D converter has a l...

Страница 23: ...39 BCD TEMPERATURE OUTPUT PIN 1 800 3 400 5 200 7 100 9 80 11 40 13 20 15 10 17 8 19 4 21 2 23 1 25 8 27 4 29 2 31 1 33 Data Valid 35 15V DC 37 15v DC 39 Digital Ground BCD TEMPERATURE INPUT PIN 2 1...

Страница 24: ...2 5885 3 4 2 5762 2 5754 3 6 2 5633 2 5622 3 8 2 5499 2 5491 4 0 2 5361 2 5359 BP27 4 2 2 5220 2 5213 4 6 2 4928 2 4920 4 8 2 4750 2 4774 5 0 2 4631 2 4628 5 5 2 4254 2 4262 6 0 2 3877 2 3896 6 5 2 35...

Страница 25: ...1 0859 1 0362 38 0 1 0804 1 0802 BP13 40 0 1 0752 1 0754 45 0 1 0632 1 0632 BP12 50 0 1 0515 1 0516 55 0 1 0397 1 0399 BP11 60 0 1 0276 1 0274 65 0 1 0151 1 0149 70 0 1 0024 1 0024 BP10 0 98933 0 959...

Страница 26: ...BP 5 245 0 0 51810 0 51814 250 0 0 50479 0 50482 255 0 0 49151 0 49150 260 0 0 47818 0 47819 265 0 0 46483 0 46487 270 0 0 45137 0 45155 BP 4 275 0 0 43773 0 33763 280 0 0 42388 0 42370 285 0 0 40988...

Страница 27: ...f temperature and BCD input of set p o i n t for c o n t r o l l e r s For t h e DRC 7C 70C Thermometer Controllers t h e F8 determines i f c o n t r o l is necessary and carries out t h e c o n t r o...

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Страница 30: ...t o r R19 Resistor R19 has been s e l e c t e d t o generate 4 99 V by t h e feedback c u r r e n t of 10 microamps The trimmer r e s i s t o r R12 allows f o r an adjustment of t h e reference volta...

Страница 31: ...ecking each break point voltage t o see i f i t i s lower than t h e input voltage A s t h e break point i s found t h e temperature i s calculated using t h e following equation T VBP VAD SBP TBP whe...

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Страница 37: ...ted an i n t e g r a l term added s i g n a l and i n t e g r a l t e r m added I n an under temperature condition power is added while i n an over temperature condition power i s taken away Figure 4...

Страница 38: ...cur w i t h an open sensor lead and a shorted sensor For t h e normal range of t h e diode sensor thermometer t h e t y p i c a l voltage values are 0 1 v o l t s a t 400 K and 2 5 v o l t s a t 1 K I...

Страница 39: ...r shorted sensor o r h e a t e r leads especially i n an 2 Leakage paths between h e a t e r and sensor leads t h a t induce area of frequent disassembly e l e c t r i c a l feedback i n addition t o...

Страница 40: ...r proper operation U18 is a quad two input NAND g a t e 7400 and U19 is a hex i n v e r t e r 7404 Checking l o g i c levels of these I C s w i l l insure proper g a t e operation I f both U 1 8 and...

Страница 41: ...t present check f o r operation of U 1 8 7400 as described i n Table 5 1 s i g n a l c i P i n 6 of U7 Should b e same a t P i n 12 of U21 If s i g n a l not present checkinterconnections on P C board...

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Страница 44: ...t o t h e on U 3 and U5 are high for example i f 100 0 were dialed i n t h e only l i n e on would be t h e most s i g n i f i c a n t d i g i t d i g i t 1 I f t h e proper l i n e s are on and i t...

Страница 45: ...rve a t other points counts Also PROM U 1 3 could be bad than the c a l i b r a t e d point Other s u b t l e problems could occur w i t h t h e DRC series of instruments t h i s section w a s not hel...

Страница 46: ...ositive Voltage Regulator 7805CT U32 12 volt Positive Voltage Regulator 7812CT U33 15 volt Positive Voltage Regulator 7815CT U34 5 volt Positive Voltage Regulator 7805CT U35 15 Volt Negative Voltage R...

Страница 47: ...N60C R201 1 21M 1 W RN60C R202 1 2 1 M 1 W RN60C R203 95 3 K 1 W RN60C R205 5 6 0 0 1 W RN60C R206 Not present RN60C R207 1 0 5 0 1 W RN60C R208 1 0 K 5 W R204 47 5 K 1 1 8 W RN55C R209 10 K trimpot s...

Страница 48: ...MFD 200 V Polypropylene C31 68 MFD 100 V Mylar C32 68 MFD 100 V Mylar C33 1 5 MFD 10 V Tantalum C34 68 MFD 100 V Mylar C35 33 MFD 200 V Polypropylene C36 033 MFD 50 V Polypropylene C36A 320 MFD 100 V...

Страница 49: ...o n Diode 100 V 3A MR 501 CR201 Precision Reference Diode 6 9 V LM 229A FU1 Fuse Holder 3 4A 250 V Fuse L i t tlefuse FU2 Fuse Holder 1A 250 V Fuse L i t t l e f u s e J1 40 p i n 3 M connector for BC...

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