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Summary of Contents for DRC-70

Page 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...

Page 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...

Page 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...

Page 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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Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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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Page 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...

Page 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...

Page 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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Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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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Page 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...

Page 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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Page 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...

Page 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...

Page 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...

Page 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...

Page 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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Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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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