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805A_Manual - Lake Shore Cryotronics, Inc.

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1. ria 5 lt z 3rka s 2 zerg 14 us NI Hz Sorn 13533 63 E 83 S31vu 5 Si ta Y e ANNONO 3 1331044 r2 ONOI 15 SY 2 c2 tv 965116 WNOIS 3 1 G3A31338 2v 33 s 2 iv Viva 0331238 ut Ls 1 L 135 3 50 29 3191 880111 209 112 Y2 3 55 0 91 97 122 13534 2 81 3r 13539 2190 52 viva Q311IUSNYHL 55 01 15 pee cn tav anas 01 53 1noxs SERE em m Sr 1 INIX1L YLVG 23 m Less 3t 282111 5 5 80 z 190 6 gov ACS wet cie 50 s 3801 5 220 0 EUN 13 994 5 FS I 5 v 8 8 L This Page Intentionally Left Blank Model 805 Model 8054 IEEE 488 Interface MODEL 8054 IEEE 488 INTERFACE 8054 1 INTRODUCTION This Section contains installation and maintenance information pertaining to the Model 8054 IEEE 488 Interface for the Model 805 Temperature Controller A description as well as operation and programming information is given in Section 4 of the manual 8054 2 INSTALLATION The 8054 IEEE 488 Interface is factory installed if ordered w
2. S 8 L 8 4 10 68 19 8 12 19 47 cs eu ve SNOIL23NNOOH31NI 1075 NIYH 500 SOINOHIOAHJ 380 5 3 Y71 M 15 OND S 3331 2 2190 52 1140 2 OND 290 9 5J 4510 55 3 55 9 52 ISIN 52 p S 3331 52 dS 55 T3NYd 2 1 Id id gay 118 201 Tav NID 104 20 8 1900 109 SI cav Y 1NOJ vay NI 800 vay say 372 104 sav 1 1140 90v 104 S2 sav IND av Lay ay Pe IND GND Iv W 29 5 aw OINI aw 5 S 15 8 a 13538 13538 32 INS 152 UND 383 82 152 OND M qu uH 5 5 9 5 1353 184 15538 st s1 SX 1NI 1140 1 11 0 1 ste 91 ZdO 1NI GND 01 1190 1N02 DET Ar 5398 A 9908 Id 10 Id OUVI AWOL 9908 ONY 505320409211 1015 NOlldO WT i lo GAYI ONINOO 90 2 1019 9 1V0 H 104 140 53 qu NI H 1v0 9 QN 158 SJ NIGt 104 52 8 aSld 3331 S3 M Js tb ow 4511 5 3331 S3 13539 ar Ads 135 ms 28 4514 2v eS1d 1Y ody QNO 6 8 1 51 c E do 1e aSId MOM ey Pse 8 8 1nO A 1 1 TONI 88 dSId 13538 zav A 5508 L 100 j 1 1Y dSId At 5508 8 cy ino a t CuNI YONI 2150 INI 8 1 S 1S2 GND L e MON l MON
3. ata 7 983281 cen ui ES 5 8 3NNYH2 Use sA 8 5 8 918 A i rt m As 5808 1 02 ED 118 NO 18 s 3 aty 006 90 1 5 428 8 Te 1F Oty wee Gly 518 sca Si si 4 pise Sie 18 18 LAO A Y 1 ivi HS NIHA WANOA V LT icy Oise asia 5 v 1 s 9 L 8 S 30 13315 16 68 L19 8 au sea 25 89 61 58 4 ON 1535 1711910 auvoe NIYH SBO 300W 11 87 rar 62 28 8510 ac Ta d510 8 451 104 5 10d CEN 52 87 SOINOMIOQANJ JYOHS AHYI 10 9511 511 X19 Id 901 9 229 S 1020715 SIL 8 15 016 3511 59 NISC 18 2C T M i 6 65 81 95 82 075 61 075 81 075 9 278 96 215 075 26 015 GUC O 15 82 0715 92 075 a 22 86 5 5 92 0715 XD 10d 104 9 4 805 C rC 276 26 255 0 EZ TES
4. k k k k k k k kk k k kk k k KOK KUK KRK K K k k Ok KUK KUK K K K KUK K K KUK oK KUK oK KUK OK K KOK K K UK Interface Status ZN1 MN2 TN3 8 Characters plus to 2 Terminators where is EOI status is Mode status is Terminator status Input and Option Card Data9 A C4C5 B C35C4 1 C5C6C7Cg 27C9C19C14C12 23 Characters plus up to 2 Terminators where C4C2 is the A Input Module C3C4 is the B Input Module is 8055 if the Linear Analog Option is Present Cog C15 is 8053 or 8054 if the RS 232C or IEEE 488 Option is present a Nj corresponds to a numeric value 0 9 b The AND symbol is used to indicate messages sent concurrently C END EOI d DAB last data byte C corresponds to an alphanumeric 0 F COPYRIGHT 4 88 LSCI 4 9 Section IV 4 7 5 The W2 Data String For the case of W2 the data string would have the following format ZO M2 T1 TERM1 J TERM2 where the ZO M2 and 1 are defined in Table 4 6 4 7 6 The WI Data String This Data String gives the input module present d3 d6 P2 P3 or R1 in Input A and B whether the analog option is presentand the interface option if present A typical data string would be A d3 B P2 1 8025 2 8054 CR LF which indicates a standard 3 volt input for Input A a 100 ohm platinun input for Input B a linear analog output option in Option Slot 1 and an IEEE 488 option in Option S
5. eu CERIS uns LE ya quo C2 1 25A v81211 eu Cr Nid l tn Yes AS suo1vinb533 S016 Vn AS Wo01v1n933 ON iNYd 8 932040 N2 01211 dO 91 YOLIIVdWVO GAHILIAS 91 uot3disasaq 29 920 85 610 201 020 201 100 901 820 701 JequnN 1484 1351 3 5 3 LU Cd Zd S09 1511 518 4 318 39 1438 REPLACEABLE PARTS LIST MODEL 805 MAIN BOARD ITEM LSCI PART NO NUMBER DESCRIPTION MFR PART NO 101 285 CAP ELECT 10000MF 25V 00 101 225 CAP ELECT 470MF 35 ECEAIVV471S 101 245 CAP ELECT 3300MF 50V SM50T3300 101 207 CAP ELECT 10MF 100V 30DTE1407 101 034 CAP PP IMF 100V MPP2X 1 0 100 10 101 023 CAP PP 22MF 100V MPP11 22 100 10 102 003 DIODE RECTIFIER MR501 BRIDGE RECTIFIER W02M DIODE RECTIFIER 1N4006 102 008 102 001 106 419 106 139 106 143 106 427 106 602 106 603 106 706 CONNECTOR MB TO BP 3592 6002 CONNECTOR MB TO TX1 2630 09 74 1041 CONNECTOR MB TO TX1 2630 09 74 1061 CONNECTOR MB TO DB 3593 6002 CONNECTOR MB TO MOD A B SSW 107 01 G S CONNECTOR MB TO MOD A B SSW 108 01 G S LOCKING HEADER 2 PIN 22 29 2021 105 323 RELAY DRY REED 3501 05 9112 102 072 105 014 105 408 105 404 105 121 106 229 106 227 102 011 102 013 102 014 102 024 102 021 104 529 104 526 104 089 TRANSISTOR PNP 2N3906 POWER SWITCH 2 POLE F 01 2UEE NE15 SEN
6. sav 8 I 8NI es sav t HS t Wns 2s 15 X 3331 I 2 P 15 P s P 41 T Ur11 3023 ANNT ay a 9368 YO C505 30123NN03 30123800 uv08 AYSI 30123NN02 NOILdO SYOLINOH NOSN3S er r i I 2 r 5 3 L 8 102 058 102 053 106 139 105 302 105 304 103 063 103 628 103 495 103 540 103 581 103 675 104 355 104 419 104 162 104 408 104 404 104 088 104 076 104 022 102 104 104 068 104 453 104 356 REPLACEABLE PARTS LIST 6 ANALOG CONTROL CARD Bp A HU H H DIODE ZENER 24V DIODE ZENNER 5 1V 4 POST LOCKING HEADER RELAY SPST 20W RELAY SPST 50W PREC 100K WWD 1 5K WWD 9 84K WWD 2 92K WWD 0 965 WWD 587 5W OPTOCOUPLER 16 BIT D A CONVERTER DISPLAY DRIVER 10 BIT D A CONVERTER 8 BIT D A CONVERTER OP AMP QUAD DUAL SPDT ANL SWITCH OP AMP JFET INPUT POWER MOSFET 90V P CHAN IC OP AMP DUAL MC1741 IC 8 BIT D A CONVERTER IC OPTOCOUPLER 111 075E 184749 1N751A 2630 09 74 1041 BlA5H P1A5H 740L6000 DAC703 BH 5 MM5451 AD7533JN AD7523JN TSC914D HI5043 5 LF356N VNO109N5 MC1458PI ADC0O831CCN 740L6010 2 40 UMEN 18 68 809 8 ATSAI1234S3H HO1100 3H1 NO LY EVAN ON
7. SENSOR ID Curve Address OPERATING INSTRUCTIONS Model 805 Temperature Controller Reset Settings Lx doe Model 805 Temperature Controller Nominal Gain and Reset Settings Standard Curve Information Sensor Curve Information Precision Option Table us REMOTE OPERATION Interface Functions IEEE 488 Address Switch for the Model 805 Allowable Address Codes for the 805 IEEE 488 Bus Commands 5 Model 805 Front Panel Rear Panel TRA 9 9 9 9 Model 805 Model 805 Model 805 Model 805 Model 805 Command Summary of Instrument setup Summary of Output Requests Interface Setup Commands and Request Status Command Summary for Instrument Setup Command Request Summary for Setpoint Setup Summary for the Control Parameters 4 10 Model 805 Output Data Statements Table SECTION V MAINTENANCE Table 5 1 Input Card Characteristics SECTION VI OPTION AND ACCESSORY INFORMATION Table 6 1 Option and Accessories for 805 Temperature Controller COPYRIGHT 4 88 LSCI Model 805 Section I SECTION I GENERAL 1 1 INTRODUCTION The information contained in this operations manual is for the installation operation remote programming and option and acces sory information for the Lake Shore Cryotronics Inc Model 805
8. Output 0 0000 to 6 554 V for display 0 0000 6 5535 V Sensitivity 1 V V Resistance 805 P2 P3 and R1 P2 Output 0 000 to 3 000 V for display 0 00 300 00 Q Sensitivity 10 mV ohm P3 Output 0 000 to 3 000 V for display 0 0 3000 0 Q Sensitivity 1 mV ohm R1 Output 0 000 to 10 000 V for display 0 000 99 999 Sensitivity 100 mV ohm 1 Set the power switch to OFF and disconnect the power cord from the unit Remove the two top panel screws and slide the panel off Note on the calibration cover the position of Option Slot 1 which the 8055 will occupy 8055 1 Model 8055 Analog Output 2 Remove the three screws that secure the calibration cover to its clips and remove the cover 3 Plug the 8055 printed circuit board into Option Slot 1 with the component side to the left of the unit as viewed from the front 4 Install the calibration cover by reversing procedure in 3 5 Install the top panel 8055 5 OPERATION The output resolution and equivalence is given in Table 8055 1 For a temperature display of 100 0 K the 8055 would output 1 000 V The output is rounded to the equivalent unit for the 1 mV output display of 23 42 would result in an output of 0 234 V and a display of 23 47 K would result in an output of 0 235 V 8055 6 CALIBRATION The Model 8055 has been calibrated to specification prior to shipment If re calibration is needed use to the
9. amont Z FEU u K The sixth and seventh bits BUS CONTROLLER originated determine whether the instrument is being addressed to TALK or LISTEN Only the first five bits of the binary code are These bits are the same for the TAIK listed and LISTEN address COPYRIGHT 4 88 LSCI Model 805 4 4 3 The 488 INTERFACE bus address for the Model 805 is set by switches 4 through 8 which are reserved for the address selection Switch 4 is the most significant bit MSB 16 and 8 is the least signi ficant bit LSB 1 The factory preset address of this instrument is 12 see Table 4 2 Address switch numbers 5 and 6 should be CLOSED 1 which will result in the Address Switch having a setting of 00001100 or 10001100 dependent on the requirements for the delimiters 4 5 IEEE 488 BUS COMMANDS 4 5 1 A Uniline Command A Uniline Command Message is a command which results in a single signal line being asserted The Model 805 recognizes two of these messages from the BUS CONTROLLER REN and IFC See Table 4 3 When the BUS CONTROLLER executes the ap propriate software code the effect is to pull the corresponding Inter face Management line low For Section IV example when the software command REMOTE712 is executed by the HP86 digital computer the management line REN is pulled low and the listen address 12 issued to signal the ins
10. uva 3415 NO I 2 L if 5 v 5 S ims 30 2 13315 5 10 68 19 8 ye LI ON 68 el1 S S324DOS 1N34Nn2 GuvOG NIYH 509 33004 SOINOMiOAMH 380 5 IVI x Gui 1 8 S3 A gt SI A 21 8 gt 8 52 ASI 8 TANNVHS gt v SJ 59 A t DuY Y 53 ASI V _ _ s L 10 68 L19 8 Zv 92 01 OUS i ees 1435359 LON xv ONY 558 tH 2W IA s ANO NI 39 170 SOTYNY 93135 HO3 35 EAF ANY ede 3l 2 L Nid TRAON L Nid 1 5 15 90 BUY CCN Y BIN 1 SO IN0810A83 3HOHS JAVI 310N oA v sco yr 110 8 1N02 E rL 6 5 518 F ces 2 v S S S S to UN r 139 L lt UND 100 H s NI u EJ 1 O 009 f 8 i 3 owe 2 ng 659 7 d 62 815 tH 100 Ane m T EZ TET aco 3 I 5 si sie 310004 14 8 pls 18 T x Tar HE 20 1905 6 ts s 69 BNI k AH ano mtoe eso 7 7 8 1N03 zie oo cla 454 NIA 822 7 t gen 8 ane
11. 2 3618 2 3269 1 56027 2 2919 1 54097 2 2570 1 52166 2 2220 1 50272 2 1871 1 48443 2 1521 1 46700 2 1172 2 1 44850 2 0909 1 43488 2 0646 2 1247 1 42013 2 0119 2 0708 1 39287 1 9592 2 0170 1 36687 1 9066 1 9632 1 34530 1 8338 1 9011 1 32412 1 7610 1 8390 1 30422 1 6984 1 7769 1 28527 1 6359 1 7148 1 26702 1 5646 1 6527 1 24928 1 4932 1 5724 1 23184 1 4219 1 4922 1 21555 1 4120 1 19645 1 3317 1 17705 1 2837 1 15558 1 2357 1 13598 1 1877 1 12463 1 0970 1 0902 1 0850 1 0798 1 0746 1 0633 1 0520 1 0407 1 0287 1 0166 1 0046 1 0981 1 0909 1 0848 1 0797 1 0746 1 0630 1 0515 1 0399 1 0284 1 0159 1 0035 0 9911 0 9849 0 9780 0 9649 0 9518 0 9388 0 9257 0 7060 0 6918 0 6777 0 6635 0 6493 0 6351 0 6210 0 6068 0 5926 0 5789 0 5651 1 11896 1 11517 1 11202 1 10945 1 10702 1 10465 1 10263 1 09864 1 09477 1 09131 1 08781 1 08105 1 07053 1 05277 1 04353 1 03425 1 02482 1 02044 1 01525 1 00552 99565 98574 97550 0 5514 0 5377 0 5246 0 5115 0 4984 0 4853 0 4722 0 4588 0 4454 0 4320 0 4186 0 4045 0 3904 0 3763 0 3622 0 3476 0 3330 0 3184 0 3038 0 2893 APPENDIX DIN Standard Curve for 100 ohm Platinum Sensors 3 82000 4 23481 4 68000 5 14601 5 65000 6 17000 6 72621 7 31000 7 90899 8 57000 216 25553 218 01000 219 78000 221 55000 223 31000 225 07000 226 83000 228 59000 230 34000 232 1059
12. 4 8 4 The SENSOR ID on Return to Local When the Model 805 is returned to local the SENSOR ID s on the back panel are read and data entered over the IEEE 488 Bus using the commands ACC or BC1C2 is lost 4 8 5 The W1 Data String This Data String gives the Display Control A and B information The data string will have the following format A B K K A20 02 B42 04 CR LF The above string indicates that the Display Sensor is A the Control Sensor is B both are in kelvin units the SENSOR A ID indicates that the Digital Filtering for this channel is ON and the curve selected is number 2 the curve being used for Input A is 2 the SENSOR B ID indicates that Digital Filtering for this channel is ON and the curve assigned is 4 the curve being used is also 4 Both channels COPYRIGHT 4 88 LSCI Model 805 Section IV Table 4 7 Model 805 Command Summary for Instrument Setup Functional Description Selection of Units Sensors Resolution and Deviation Function 0 Select Set Point Control Units Forms of the command are FOK kelvin FOC celsius FOF fahrenheit and FOS for Sensor Units in volts or ohms F1C4 Function 1 Select Display Sensor Input A or Input B Forms of the command are F1A and F1B 1 2 Input A ID and B ID are 00 thru FF Forms of the command are 00 thru AFF ranges between 0 and F and selects the Sensor Curve number 00 0 thru 15 F sa S 123 4 4 3 2
13. 805 6 Calibrate the Sensor Signal Multiplier Connect the DVM plus and minus leads to the V and V Sensor Output Signal pins for the appropriate Input module of the J1 SENSORS MONITORS connector Connect the precision voltage source across the V and V of J1 for the appropriate input and set the standard to 1 5000 volts Adjust the trimpot marked M I on the module cover until the DVM reads as close to 0 68666 volts as possible 805 P2 P3 R1 Calibrate the Input 10 Amplifier Connect the DVM plus and minus leads to the V and V Sensor Output Signal pins for the appropriate COPYRIGHT 12 87 LSCI 5 7 8 805 Input Modules Input Card of the 41 SENSORS MONITORS connector Connect the precision voltage source across the and V of 1 for the appropriate input and set the standard to 0 0000 volts Adjust the trimpot marked AMP Z on the module cover until the DVM reads as close to 0 volts as possible Set the standard to 0 2500 volts and adjust the trimpot marked AMP S on the module cover until the voltage reads 2 5000 volts A D Calibration Verify the input is processing the module data correctly For the 805 6 an input of 1 0000 volts results in a display of 1 000 volt and 5 0000 results in 5 000 volts within 0 001 volts An input of 0 2700 volts results in a display of 270 0 ohms for the 805 P2 2700 ohms for the 805 P3 and 81 00 ohms for the 805 R1 A more accurate calibration of the A D
14. User s Manual Model 805 Temperature Controller This manual applies to instruments with Serial Numbers from 0 to 17999 Obsolete Notice This manual describes an obsolete Lake Shore product This manual is a copy from our archives and may not exactly match your instrument Lake Shore assumes no responsibility for this manual matching your exact hardware revision or operational procedures Lake Shore is not responsible for any repairs made to the instrument based on information from this manual akeShore Lake Shore Cryotronics Inc 575 McCorkle Blvd Westerville Ohio 43082 8888 USA Internet Addresses sales lakeshore com service lakeshore com Visit Our 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 government or other contractual support or relationship whatsoever has existed which in any way affects or mitigates proprietary rignts of Lake Shore Cryotronics Inc in these developments Methods and apparatus disclosed herein may be subject to U S Patents existing or applied for Lake Shore Cryotronics Inc reserves the right to add improve modify or withdraw functions design modifications or products at any time without notice Lake Shore shall not be liable for errors contained herein or for incidental or consequential damages in connection with furnishing
15. 0 and make sure Switch 1 is OPEN 0 to select CR LF as the terminating charac COPYRIGHT 4 88 LSCI Model 805 ters Note that this should be done prior to turning on the instru ment since the Model 805 updates the IEEE address power up only Confirm that the address selected is correct by holding in the button for longer than one second and observe the IEEE address on the front panel display as follows 805 12 4 6 1 Commands and Requests The device dependent commands to program the Model 805 are given in Table 4 4 The 805 must be addressed as a LISTENER to receive any instruction or string of instruct ions from the Command list The Model 805 input data format does not require a set number or set sequence of Commands to implement proper instrument set up These Commands are processed only after the terminators TERM1 TERM2 are sent across the bus listing and explanation of the 805 commands are summarized in Table 4 4 There are commands for Interface Setup Instrument Setup and Control Setup Table 4 4 Section IV The Output Statement Requests are sent by the BUS CONTROLLER to the Model 805 to tell the 805 what data to output when data output is requested These requests are listed in Table 4 5 and the data formats are described in detail in the following tables as well as the adjoining text associated with those tables 4 7 INSTRUMENT SETUP COMMANDS AND REQUESTS 4 7 1 EOI
16. 4 10 4 10 4 10 4 12 4 12 4 12 4 12 4 12 4 12 4 12 4 13 4 13 4 15 4 15 4 16 4 16 4 16 4 16 4 16 Que I WWWWWWWNNNNNNNNPPHP PE TOT COPYRIGHT 4 88 LSCI SECTION VI OPTION AND ACCESSORY INFORMATION OV OV OV 1 2 3 APPENDIX A APPENDIX C TABLE OF CONTENTS Gain 4 4 ee Reset o o o o Standard 25 Watt Output 5 5 6 1 5 5 6 2 5 5 7 Checking the Heater Ranges 5 5 7 1 5 5 7 2 W60 60 Watt Option CALIBRATION s 9 5 6 1 Sensor Input Module Calibration 5 6 2 Current Source Calibration 5 6 3 A D Converter Calibration 5 6 4 Set Point Calibration 5 6 5 Heater Meter Calibration 5 6 6 Output Current Adjust TROUBLESHOOTING o gt 5 7 1 Checking the Temperature Reading 5 7 1 1 Sensor Current Monitor Voltage Reading is Incorrect 5 7 2 Checking Setpoint Voltage 5 7 3 Checking the Gain and Reset 5 7 3 1 Gain x 5 7 3 2 Reset 4 Checking the Heater Circuit 4 Set Point Calibration INTRODUCTION OPTION INPUT MODULES ACCESSORIES 6 3 1 Model 805 Connector Kit oie 6 3 2 RM 3H1 3H2 Rack Mount Kits 6 3 3 8072 IEEE 488 Interface Cable 6 3 4 8271 11 Sensor Heater Cable 6 3 5 8271 12 Sensor Heater Output Cable UTPUT
17. 5 d 841 eec 002 toy 9 ece era acy 1v d 279 gt 104 lyc 2715 gt 104 3 ec e s aus VISLNI roy 10 a 8 gt esu Pd l A Sai A und 338 dl A u a lI 15 3u959 8 11 19 FI l MS Tea 100 DOWNY Xv 18 1 ace z9 58 z S XDS2 _ XDS1 XDS17 0518 DS19 0520 0521 0522 0515 0514 REPLACEABLE PARTS LIST 805 DISPLAY BOARD LSCI Part Number Description MFR MFR PART NO NO CABLE MB TO DB 105 146 SWITCH POT 100K CCW DET BA12030018 105 145 POT 100K BA12010043 105 651 SWITCH KEF 10901 104 261 IC 3 8 LINE DECODER 74LS138 104 160 IC TRANSISTOR DRIVER UDN 2585A 104 453 IC 8 BIT A D CONVERTER ADC0831CCN 104 210 IC INVERTER 7406 1 99 49308 AvidSid 568 ONT SQINOMLOAYD 3HOHS DYI vive 5 EEn zant i e Taur rr a ev asia 2v acta zr a 1v ast 11 80 9v astQ er ar sn 12 85 Des 2a dsta 8t a gt 1e dsta 91 85 a asta 5 0 AY 95 mo LT 4 tesaaqv JJA i a ts A es 1 uDSN3S i Ww rs WY es I gt 4 v weas HoH T ss ts d o 4 vsas2 N n 383
18. 5 Rhodium Iron Resistance Sensors 6 Germanium Resistance Sensors 7 Carbon Glass Resistance Sensors 8 Capacitance Sensors 9 Reserved for Thermocouples COPYRIGHT 5 88 B 1 13 thru 18 Stored in the Sensor Curve Information Table typically where the sensor serial number is stored in Precision Options The sensor serial number formats are as follows where is used to indicate a 0 9 numeric Sensor Type Format DiHHHHE D 444 P P HH CHHHE 4444 No S N 0 1 2 3 4 5 6 7 8 9 B 2 COPYRIGHT 5 88 APPENDIX c 805 Error Code Summary The error codes for the 805 are separated into categories The ErrOx codes are for mainframe error conditions the Errlx codes are for Input Card error conditions If an ErrOx or an OL or Err2x error occurs for an input selected as the control input the heater range is taken to OFF and must be reset following correction of the fault condition The following is a summary of the error codes COPYRIGHT 5 88 Possible Cause Corrective Action The unit encountered an unwriteable NOVRAM data location When this error occurs the unit displays the error stores it in the WS data location and halts operation The NOVRAM initialization sequence should be performed to try to correct the problem If the error code still exists the NOVRAM needs to be replaced The unit performs a NOVRAM check on power up If the unit detects a NOVRAM data error or i
19. PORT EXPANDER INT P82C55A 5 U2 104 425 IC D A CONVERTER DAC71 CCD V 5 104 089 IC OP AMP MAX430CCP U4 104 482 V5R15 15 DC DC CONVERTER Y dO 1 133HS inovssas t4 L8 LvS 8 140 170 9 3528 ONT SOINQYLOAND 5 3MY1 si t ace wat t 63 eu 83 ay 314 8t et ar a 12 2e 2 ve ST STUSA st 651 L sues 2 1 CES i moo 55 or 8 uu adi E MEIN E 5 4 eS p 2 So rra lt S I ean a SC s C H p rs T se re eee y sI a S Em E C r LT 8 ct t et 02921121 992284 A 5506 3308 1140 52 15538 ev cay sav sav edv APPENDIX A Standard Diode Voltage Temperature Characteristics D CURVE E1 CURVE DT 470 CURVE 10 LEME CR been VOLTAGE BP VOLTAGE BP VOLTAGE 2 5984 2 6591 1 69808 2 5958 2 6567 1 69674 2 5932 2 6542 1 69521 2 5906 2 6518 1 69355 2 5880 2 6494 1 69177 2 5854 2 6470 1 68987 2 5828 2 6446 1 68912 2 5735 2 6355 1 68352 2 5643 2 6265 1 67880 2 5551 2 6175 1 67376 1 66845 1 66292 1 65721 1 65134 1 64529 2 4807 1 64112 2 4667 1 63263 2 4527 1 62602 2 4387 1 61920 2 4247 1 61220 2 4108 1 60506 2 3968 1 59782
20. Replace the fuse per Table 2 1 5 Replace fuse holder close fuse compartment and connect power cord 5 4 LINE VOLTAGE SELECTION The rear panel three pronged line power connector permits the 805 to be connected to 100 120 220 or 240 VAC line voltages Use the following procedure to change the line voltage WARNING To prevent shock hazard turn off the instrument and discon nect it from AC line power and all test equipment before chang ing the line voltage selection 1 Open fuse compartment cover using procedure in Section 5 3 5 1 Section 2 Remove voltage selector wheel and insert with the proper volt age facing out Note that the wheel can only be inserted with the writing read right side up 3 Install the proper fuse as out lined in Section 5 3 5 5 OPERATIONAL CHECKS If unit fails operational checks see Section 5 7 Troubleshooting 5 5 1 Test Connector A test connector for the rear panel SENSORS MONITORS connector J1 to simulate sensor inputs is required for operational checks of the 805 The test connector can be made by taking the solder pin plug supplied with the 805 and configuring two resistors to simulate the Input A and Input B sensors in the two wire configuration as shown in Figure 2 2 The test resistors specified in Table 5 1 are used in the opera tional checks 5 5 2 Operational Test Procedure The operational performance test is designed to verify the overal
21. VREF and adjust PWR VREF ADJ until the DVM reads 1 000 volts 5 6 6 Output Current Adjust Place the high lead of the DVM into TP5 HTR V the low lead into TP9 PWR V and adjust PWR V ADJ until the DVM reads 1 000 volts 5 7 TROUBLESHOOTING 5 7 1 Reading 5 7 1 1 Sensor Current The first step in checking the operation of the temperature reading is to use a test resistor as specified in Table 1 for the appropriate input The voltage across the resistor should be the resistance value times the current value given in Table 1 s Sensor Current column The voltage value should be accurate to within 0 0001 volts of the voltage value given by multiplying the test re Checking the Temperature COPYRIGHT 1 88 LSCI Section V sistance times current value For example the voltage for a 805 2 should be 100 ohms times 0 001 amps 0 1000 volts If the voltage value is incorrect then the current trimpot will need to be adjusted 5 7 1 2 Monitor Voltage The volt age across the sensor or test re sistor is also available on the monitor plug connections are in section two of the instrument s instruction manual The monitor voltage will equal the sensor volt age for 3 volt diode inputs and all platinum inputs 3 P2 P3 R1 If the input is a GaAlAs Diode input then the monitor voltage will be 0 458 times the sensor voltage 5 7 1 3 Display Voltage or Resis tance The display reading in volts or resistan
22. performance or use of this material Obsolete Manual April 1988 TABLE CONTENTS SECTION I GENERAL INFORMATION 1 INTRODUCTION e s e s mom n 1 1 2 DESCRIPTION s Ic 1 1 3 INPUT CONVERSION MODULES s ece anere ue r ee 1 3 4 SPECIFICATIONS sse s e n 1 3 SECTION II INSTALLATION 2 1 INTRODUCTION e s e s e s e s s oo 2 2 INITIAL INSPECTION 2 3 PREPARATION FOR USE s lt lt on Power Requirements e s we Power Cord cies de ates sale cli lap Grounding Requirements Sas 392 ten tom Ree Bench Use s e ww Rack Mounting Sensor Input Connections Kener SIR S Sensor Output Monitors e e s e lt es o SENSOR ID Switches e e s we 9 Heater Power e lt ONS Venc S cw et m ae He de Model 8053 RS 232C Option Model 8054 IEEE 488 Option HOP Model 8055 Linear Analog output option QU teh ker dS et RONMENTAL REQUIREMENTS
23. s Operating Temperature Humidity Altitude ACKAGING FOR SHIPMENT 9 O O gt Q NNNNNNNN 9 Q Q C2 CO CO Q WWW N gt O t n t i o QUPAA ARR ID IO IND HUNP NNN DG P I I gt ET NN e ul MN P 2 6 SECTION III OPERATING INSTRUCTIONS 3 1 INTRODUCTION gt va 22 SO seus lie d see 3 3 2 INSTRUMENT CONFIGURATION x 3 3 2 1 Input Modules a sms e we we 3 3 3 PRECISION OPTIONS s S 4 e o o oo 3 3 4 CONTROL FUNDAMENTALS 3 3 5 CONTROLS AND INDICATORS s e e lt lt o o e o o o o 3 FRONT PANEL DESCRIPTION 3 6 POWER ON OFF Switch 2 s e s lt 9 ot onm n9 3 3 6 1 POWER UP Sequence 3 3 7 DISPLAY SENSOR Block s oso 3 3 7 1 Display SENSOR 3 3 7 2 Units Select u s cese erd e 4 me RS CUERO e UA 3 3 7 3 Display SENSOR Units s seses 3 COPYRIGHT 4 88 LSCI CONTROL BLOCK 3 1 Voltage Units 3 2 Resistance Units 3 3 Temperature Units iltering the Displ
24. 1 is the setting for all Hewlett Packard computers Figure 4 1 Section IV When Switch 1 is CLOSED 1 a variable terminating character format may be selected for the input and output data In this configuration the power up default terminating characters are LF and CR with the EOI line being set with the output of the Carriage Return CR How ever the two terminating characters can be changed via input data to the Model 805 as detailed in Table 4 6 If the terminating characters are changed by the user these are only in effect until the instrument is turned off 4 4 2 TALKER and or LISTENER Configuration Since the Model 805 is both a TALKER and a LISTENER normally switches two and three should both be OPEN 0 These switches are usually of use when one instrument is a TALKER and another instrument is a LISTENER and they are to share the same address IEEE 488 Address Switch for the Model 805 OPEN 0 Address switches 4 is MSB 16 8 is LSB 1 Switch 3 Switch 2 CLOSED 1 position sets the 805 in the listen only mode by disabling TAIKER capability Switch 1 used to define the instrument s delimiters Refer to Section 4 4 1 of the text for details COPYRIGHT 4 88 ISCI CLOSED 1 position sets the 805 in the talk only mode by disabling LISTENER capability Model 805 Section IV Allowable Address Codes for the Model 805 Factory preset address is decimal 12 Table 4 2
25. 5 2 GENERAL MAINTENANCE Clean the 805 periodically to rem ove dust grease and other con taminants Use the following pro cedure 1 Clean the front and back panels and case with soft cloth dampened with a mild detergent and water solution Note DO NOT use aromatic hydrocarbons or chlorinated sol vents to clean the 805 They may react with the plastic materials used in the unit or the silk screen printing on the back panel 2 Clean the surface of the printed circuit boards PCB using clean dry air at low pressure If grease is encountered spray with Freon T F degreaser and remove grime with dry low pres sure air 5 3 FUSE REPLACEMENT The line fuse is accessible from the rear of the 805 Use the fol lowing procedure to check and or replace the fuse WARNING To prevent shock hazard turn off the instrument and disconnect it from AC line power and all test equipment before replacing fuse COPYRIGHT 1 88 LSCI 1 Set the POWER switch to OFF and disconnect the power cord from the unit The fuse compartment is located just above the power connector 2 Open the fuse compartment by prying open the cover with a small screw driver 3 Remove the right fuse holder by sliding it out of its position with the aid of the small screw driver CAUTION For continued protection against fire hazard replace only with the same type and rating of fuse as specified for the line voltage selected 4
26. A or B key display will now show the type of input module and the curve the instrument is using b The selected curve can also be read over the IEEE by using the test program given section 4 13 The command to read the selected curve is W1 Check the manual for the format of the characters returned by W1 5 7 2 Checking Setpoint Voltage The setpoint value is available on the Analog control card of the 805 The test points will be labeled on the calibration cover TP1 and TP2 Select a 3 volt diode as the con trol input and enter setpoint values from 0 300 to 2 700 volts The values should be negative but within 0 0001 of the setpoint value If a resistance module is selected as the control input the setpoint voltage will be positive If a 3 volt diode input is not available then check the setpoint calibration procedure given in the module section of the manual 5 7 3 Checking the Gain and Reset 5 7 3 1 Gain The gain voltage is created by multiplying the error signal by the gain value To check for correct operation plug a test resistor into the control sensor input and set the setpoint above 5 6 Model 805 the temperature reading Enter a gain value and observe the voltage at TP3 gnd at change as the gain value or setpoint is changed The value will vary between ap proximately 7 3 and 7 3 The value is positive if the setpoint is above the temperature and nega tive is if the setpoint is b
27. CURVE SELECTION The 805 software interrogates the 3 6 Model 805 Nominal Gain and Reset Settings 0 1 100 3 3b Nominal Reset Settings appropriate SENSOR ID switch i e A or B to determine which standard curve or Precision Option curve has been selected Switches 5 8 The standard curves and their switch position are given in Table 3 2 The ID switch functions are defined in Figure 3 4 Table 3 2 Standard Curve Information Curve Switch Temperature Eum 226 8 Lene E Dsc pscrptn Sixteen curves 00 through 15 can be selected from the SENSOR ID switches 3 13 1 Display of Accessed Curve To determine which curve that you are using is a simple matter for the 805 Select either the A or B input and depress and hold the Input key After approximately one second the display will show the following format A 02 The above example indicates that no input module is installed in Input A and that the input is reading COPYRIGHT 10 87 Model 805 Curve 2 which from Table 3 2 we know is the CRV 10 for the DT 470 Series Sensors Since the 805 knows which type of input module is present for each input it will not for example allow the selection of the platinum curve Curve No 03 for a diode card Curve 03 is selected from the back panel SENSOR ID switch the 805 will default to the lowest Figure 3 2 Section III curve number with the correct temperature coefficient in this
28. ID and the A input for display with kelvin units Connect the voltage standard across the V and pins of the A input on the J1 SENSORS MONITORS Connector Set the Voltage Standard to 1 0046 volts and adjust the trimpot marked A D on the calibration cover until the display reads 70 0 kelvin If a Voltage Standard is not avail able then connect the 100K preci sion resistor across the I V to the V I pins of the A input and adjust the A D trimpot until the display reads 1 000 volts or fora more accurate calibration select a kelvin display and adjust the dis play until it reads 71 79 kelvin COPYRIGHT 1 88 LSCI Model 805 5 6 4 Set Point Calibration Place the ground of the DVM into TP1 GND 2s and the positive lead into TP2 SP V Change the display units to voltage Set the set point to 0 volts and adjust SP ZERO ADJ until the DVM reads 0 0000 volts Set the set point to 2 200 volts and adjust the SP SPAN ADJ until the DVM reads 2 2000 volts Repeat until neither reading changes 5 6 5 Heater Meter Calibration Connect a load resistor of appro priate resistance and wattage nor mally 25 ohms and 25 watts in place of the load heater Set up the 805 so that not more than 50 heater power is set Place the low lead of the DVM into TP6 PWR V the high lead into TP5 HTR V and adjust PWR V ADJ until the DVM reads 1 000 volts Then place the low lead of the DVM into TP8 PWR LOW the high lead into TP7 PWR
29. Model 805 SECTION Section II INSTALLATION 2 1 INTRODUCTION This Section contains information and instructions pertaining to instrument set up Included are inspection procedures power and grounding requirements environ mental information bench and rack mounting instructions a descrip tion of interface connectors and repackaging instructions 2 2 INITIAL INSPECTION This instrument was electrically mechanically and functionally in spected prior to shipment It should be free from mechanical damage and in perfect working order upon receipt To confirm this the instrument should be visually inspected for damage and tested electrically to detect any concealed damage upon receipt Be sure to inventory all components supplied before discarding any shipping materials If there is damage to the instrument in tran Sit be sure to file appropriate claims promptly with the carrier and or insurance company Please advise Lake Shore Cryotronics Inc of such filings In case of parts shortages advise ISCI immediately LSCI can not be responsible for any missing parts unless notified with in 30 days of shipment The stan dard Lake Shore Cryotronics Warran ty is given on the first page of this manual Table 2 1 100 COPYRIGHT 10 87 2 3 PREPARATION FOR USE 2 3 1 Power Requirements The Model 805 requires a power source of 100 120 220 or 240 VAC 5 10 50 to 60 Hz single phase CA
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31. Shore Precision Option Curves a proprietary al gorithm is used to fit the data to within a few millikelvin over the entire temperature range Model 805 Table 3 3 Sensor Curve Information Precision Option Table e messin Q UL Q CO 3 14 SENSOR ID Switches The SENSOR ID switches select the appropriate standard curve or the Precision Option s curve stored in the instrument as well as activate or deactivate digital filtering The switch information is described in Figure 2 3 COPYRIGHT 10 87 Model 805 SECTION REMOTE 4 1 IEEE 488 INTERFACE The IEEE 488 INTERFACE is an in strumentation bus with hardware and programming standards designed to simplify instrument interfacing The IEEE 488 INTERFACE of the Model 805 fully complies with the IEEE 488 1978 standard and incorporates the functional electrical and mechanical specifications of the standard It also follows the supplement to that standard titled Code and Format Conventions for use with IEEE Standard 488 1978 This section contains general bus information Model 805 interface capabilities addressing and the programming instructions that control the Model 805 functions 4 2 GENERAL IEEE SPECIFICATIONS AND OPERATION The following discussion covers the general operation of the IEEE 488 interface For a more detailed description of signal level and interaction refer to the IEEE Standard 488 1978 publication IEEE Sta
32. Status The ZN Command When EOI end or identify is enabled Z0 Table 4 6 the EOI line is set active concurrent with the last byte of a transfer Use of EOI identifies the last byte allowing for variable length data transmis sions EOI can be disabled Z1 Table 4 6 4 7 2 Interface Mode Command the MN 4 7 2 1 Local This message Table 4 6 clears the remote opera tion of the Model 805 and enables front panel operation Pressing the front panel button for Model 805 Command Summary of Instrument Setup Summary of Input Command Formats Choices of the commands are Table Interface Setup Commands Selects EOI status Selects Remote Interface Mode Changes terminating Characters Clear Command Instrument Setup Commands FOC F1A F1B1 AC Co BC Co Control Setup S etc PNiN5 etc IN4N5 etc RN COPYRIGHT 4 88 LSCI Select Control Units Select Display Sensor Input A ID and B ID Commands Set Point Input Proportional GAIN Integral RESET Heater Range Section IV longer than one second also sets the instrument to local provided the button has not been disabled by the Local Lockout Message see Section 4 7 2 3 See Section 4 5 6 for a discussion of the Model 805 under local opera tion while acting as a TALKER 4 7 2 2 Remote The Model 805 is in the local front panel mode when first turned on A remote message 1 see Table 4 6 allows the 805 to be
33. appropriate sensor display key A or B 5 5 4 2 Check Units Display Verify that the units can be changed by pushing in the UNITS key to change the units in sequence K F V C etc Note the unit goes to V for a diode configuration or for a resistance module 5 5 4 3 Check Sensor Units Reading Next check to see if the instru COPYRIGHT 1 88 LSCI Model 805 ment is reading the correct units volts or ohms value for the appropriate test resistor from Table 5 1 The reading should match the value given in the Dis play in Sensor Units column of Table 5 1 The allowable error is provided in the Input A D Accuracy column 5 5 4 4 Check Temperature Reading Confirm that the temperature in kelvin displayed corresponds to the selected curve number a Check the Sensor Curve Table Table 2 3 or below to deter mine the curve number that selects the standard curve or precision option that is needed b Set the SENSOR ID switches as described in Section 2 3 8 5 5 4 5 Check Input B Repeat the above process by verifying the cur rent source and the A D settings for this input 5 5 5 Heater Output Test 5 5 5 1 Heater Output Conditions The heater should output power when the setpoint temperature is above the display temperature as long as the heater is on and a gain value has been set If the sensor is a diode the voltage across the device will change inversely with temperature Therefore the hi
34. bit is used it follows the character The parity bit is determined by the number of 1 bits in the character COPYRIGHT 12 87 Refer to Table 8053 1 for parity determination Table 8053 1 Parity Determination umber of 1 5 Parity Parity Wu ena rae cer Specified Bit oa 1 Even 1 Even Even 0 The Model 8053 RS 232C Interface has a 25 pin D style connector located on the rear panel Pin Assignments are shown in Table 8053 2 Table 8053 2 Connector Pin Assignments for RS 232C Pe en Protective Ground Transmitted Data Received Data Request to Send Clear to Send Data Set Ready Signal Ground Revd Ln Sgnl Dtctr Data Terminal Rdy SONA Q PWN The RS 232C signals are used in the following manner Protective Ground AA conductor is taken to case ground potential and is common with the signal ground AB Transmitted Data BA transmits data using the EIA voltage levels 8V and 8V Received Data BB accepts data using EIA voltage levels 8053 1 Model 8053 RS 232C Interface Figure 8053 2 Model 805 Word Structure Stop Bit s _ bel Start Bitt Character 7 Bits Request to Send CA indicates to the host computer or terminal that the Model 805 Interface is ready to transmit data The Interface transmits data on line BA when the ON state is maintained on CC CB and CF while a low lev
35. case curve 00 For the case of a platinum module and no Precision Option curves present the 805 will select Curve Number 03 regardless of the settings for switches 5 8 The input module and curve number for each input is also displayed on Power Up for a fraction of a se cond Model 805 Temperature Controller Rear Panel 1 Line cord receptacle with fuse and voltage selection 2 Jl SENSORS MONITORS input output connector 3 HEATER power output terminals 4 SENSOR B ID 5 SENSOR A ID 6 Control Sensor Selector Switch 7 J2 Option Port for Model 8053 RS 232C Interface or Model 8054 IEEE 488 Interface COPYRIGHT 10 87 Section III It is possible to store up to 16 curves total in the 805 These additional Precision Option Curves 10 possible if present can be accessed for each input through the SENSOR ID associated with each input 3 13 2 The Precision Option Table Table 3 3 gives the standard curves present in the 805 as well as any Precision Options which are factory installed including their address and the number of data points as sociated with each curve This Table should be updated for the instrument if additional curves are added at a later time Up to 10 Precision Option Curves can be stored in the 805 with an average of 31 lines per curve A Precision Option Curve can have up to 97 points with two additional end points automatically put into the table by the 805 software Note For Lake
36. converter can be done in temperature For the 805 6 module select the 00 curve and in kelvin adjust the display to read 71 79 with a 1 0000 volt input Set Point Calibration Place the ground of the DVM into TP1 GND 2s and the positive lead into TP2 SP V Set the display units to sensor units Set the set point to 0 0 and adjust SP ZERO ADJ until the DVM reads 0 0000 volts Set the set point to 100 805 P2 805 R1 or 1000 805 53 ohms and adjust the SP SPAN ADJ until the DVM reads 1 000 volts 805 P2 805 P3 or 3 000 volts 805 R1 Repeat until neither reading changes Install the calibration cover by reversing procedure 2 Install the top panel MOD 3 805 Input Modules MOD 7 REPLACEABLE PARTS Included in this section are the 805 6 805 P2 P3 input conversion module schematics replaceable parts lists and illustrated component layouts Refer to the manual for ordering information MOD 4 Model 805 COPYRIGHT 12 87 LSCI 0 8 EENID NIQ wand Sr NIQ lt 025 B lt u 18 L8 69S 4 3 oH LNAI 24 508 3 ONT SOINONLOAN2 3H0HS 341 GS5 Y NId OL I H 9 Nid 123NN032 114 308 804 0S Nid OL 2 LD L N d L23NN02 37dOu d SO8 804 LON Y9 vcs vIS s019 vn o r lt fu tar Og
37. data in a bit parallel byte serial format These lines carry universal commands addresses program data measurement data and status to all the devices on the bus The three Transfer Control lines and the five Interface Management lines are asserted low which means that they carry out their function when pulled low When the voltage on one of these lines is high then the line is not asserted and the function is inhibited The General Interface Management Lines IFC Interface Clear ATN Attention REN Remote Enable EOI End or Identify and the SRQ Service request manage the bus and control 4 1 Section IV the orderly flow of commands on the bus The IFC and REN manage ment lines are issued only by the BUS CONTROLLER The IFC Interface Clear management line is pulled low by the BUS CONTROLLER to clear the interface The ATN Attention line is the management line used by the BUS CONTROLLER to get the attention of the devices on the bus The BUS CONTROLLER does this by pulling the ATN line low and sending talk or listen addresses on the DATA lines When the line is low all devices listen to the DATA lines When the ATN line goes high then the devices addressed to send or receive data for example the Model 805 perform their functions while all others ignore the DATA lines The REN Remote Enable management line is pulled low by the BUS CONTROLLER to enable a device the Model 805 to p
38. pin D style locking receptacle with hood and cable clamp and a dual banana plug for power output shield 6 pairs individually shielded 8271 12 Sensor heater output cable With buffered output and optional analog output Additional construction is from 3 pairs of individually shielded cable Note All standard sensor and heater cables are 10 ft 3m in length Monitor output instrumen tation cable is 6 ft 1 8M long Longer cables may be special ordered at an additional charge per foot Call Lake Shore for details 8072 IEEE 488 Interconnect cable 1m RM 3H1 Rack mounting kit to mount one 3 1 8 9cm x 8 20 3cm half rack unit in a 3 Y 8 9cm rack space RM 3H2 Racking mounting kit to mount two 3 7 8 9CM x 8 20 3cm half rack units in a 3 V 8 9cm rack space for handles add suffix H to rack mount choice To read correctly in a temperature scale the 805 6 and 805 R1 sensor input modules must be ordered with calibrated sensors and the 8001 Precision Option PROM sensor Use Ma netic aee 1 4K to 325K 272 to 52 C 1 4K to 475K 272 to 202 C 0 455 x Sensor Voltage Error lt 7 for B 5T and T 4K TG 120 Series 6V Diodes 14 to 800K 259 to 52730 1 4 to 800K 272 to 527 C Error lt 1 for B 2T and T gt 40K Sensor Resistance PT 100 Series 100 ohm platinum 0 3000 0 0050 No Standard 0 2 mV Curve 0 010 DIN 43760 x0
39. power meter Power out equals meter reading times range selection times 25 watts with 25 ohm heater CONTROL SENSOR annunciator A or B as selected on rear panel POWER ON OFF switch Variable GAIN proportional control Variable RESET integral control with OFF detent Digital set point in selected units see Key 1 with annunciators for decimal point Sign selector button for set point with and annunciators when selected units see Key 1 are in celsius or fahrenheit and to toggle the LOCAL and REMOTE status of the unit COPYRIGHT 10 87 3 3 Section III corresponds to greater than the above resolution some temperatures may be skipped This will be true for a silicon diode sensor between 30 kelvin and 100 kelvin where the sensitivity is approximately 2 5 millivolts per kelvin and the volt age resolution is 0 046 millivolts For this case the resulting temp erature resolution is 0 046 2 5 0 018 kelvin However below 30 kelvin the silicon diode sensitiv ity is approximately 25 millivolts per kelvin which results in an approximate resolution of 0 002 kelvin 0 046 25 For the celsius and fahrenheit scales resolution is 0 01 degree within 100 degrees of their respec tive zeros and 0 1 degree outside this band for either positive or negative temperatures 3 7 4 Filtering the Display An averaging algorithm within the instrument is available which averages up to ten readings This reading mode eliminates n
40. resistance for a two lead diode hook up can be calculated using T IR dV dT where I is the sensor current of 10 microamperes R is the total lead resistance dV dT is the diode sensitivity and T is the measurement error For example 250 ohms with dV dT 2 5 millivolts kelvin results in a temperature error of 1 kelvin Two wire connections are not recom mended for other sensor types The Lake Shore Cryotronics Inc QL 36 QUAD LEADIM 36 gauge cryo genic wire is ideal for connections to the sensor since the four leads are run together and color coded COPYRIGHT 10 87 Setting setting Description Section II The wire is phosphor Bronze with a formvar insulation and butryral bonding between the four leads 2 3 7 Sensor Output Monitors Voltage monitor outputs of both Sensor A and Sensor B are available from the same connector on the back of the instrument This connector also carries the Model 8055 Analog Output Option when present The connector pin definitions are given in Table 2 2 2 3 8 SENSOR ID Switches The SENSOR A ID and SENSOR B ID switches are used to select stored sensor curves and to activate or deactivate digital filtering The SENSOR ID switch information is described in Table 2 3 and Figure 2 3 Figure 2 3 SENSOR ID Definitions SENSOR ID SENSOR ID 12345 Input Reserved OPEN Continuous Update CLOSED Digital Fil
41. set point has the same units as the display sensor The selected units are annunciated on the front panel set point limits are determined by the sensor curve being used for the control sensor input If a selected temperature set point is outside of the control sensor s response curve temperature range the set point is set in software equivalent to 0 K which shuts down the heater output stage and the output meter reads 0 and blinks to indicate an out of range set point The resistance limit ranges are given in Section 3 7 3 2 If a resistance set point above the appropriate resistance limit in ohms is set the set point is set in software equivalent to zero resistance 0 K equivalent which shuts down the output stage The key is used to toggle the set point plus or minus when in C or F only The key is inactive COPYRIGHT 10 87 Model 805 when in V R since these units are always positive With a remote interface present holding in the button for over one second results in a REMOTE LOCAL toggle 3 8 3 GAIN The GAIN proportional knob allows adjustment of overall controller gain in the range of 1 to 1000 Maximum gain is full clockwise Logarithmic scaling is used there fore a gain setting of x100 is ap proximately two thirds of full rotation Refer to Figure 3 38 for nominal values 3 8 4 RESET The RESET knob adjusts the reset integral function of the con troller in seconds The
42. the Lake Shore Cryotronics Inc Sensor catalog for details on the above Sensors COPYRIGHT 10 87 Section I Specifications Model 805 Temperature Controller Sensor Response Selection Rear panel Dip switch Interface permits selection of appropriate Sensor response curve when more than one curve is stored see Precision Option DISPLAY READOUT Display 4 digit LED Display of Sensor reading in Sensor Units Volts or Ohms or temperature in or F shown with annun ciators Display Resolution 0 1K above 100K 0 01K below 100K voltage for diodes to 1 mV and ohms for resis tors to four places Dependent on See Input Temperature Accuracy Sensor Input and Sensor Options available Temperature Range Dependent on Input Conversion Module and Sensor TEMPERATURE CONTROL Set Point Digital thumbwheel selection in kelvin celsius fahrenheit or volts ohms with resistance option Set Point Resolution Same units as display In voltage 0 000 to 9 999 volts In ohms 805 P2 0 0 to 999 9 ohms 805 P3 0 0 to 9999 ohms 805 R1 0 0 to 99 9 ohms Controllability Typically better than 0 1K in a properly designed system Control Modes Proportional gain and integral reset set via front panel or with optional computer interface 1 5 Section I Heater output Up to 25 watts 1A 25V available Three output ranges can be selected either from front panel from o
43. the analog con trol card If this is a positive value between 0 7 3 volts depend ing on the error signal and the gain setting then the circuit is probably operating correctly With a gain voltage of approximately 2 3 volts turn on the reset pot The reset voltage TP4 should incre ment to approximately 7 3 volts Now remove the calibration cover and measure the voltage across R28 see Analog Control Card Schematic on the analog control card The voltage should vary from 0 1 volt as the gain varies from 0 7 3 volts As the gain is increased this value should increase If the voltage across R28 does not change as the gain is changed then U10 or 011 is probably bad as long as the COPYRIGHT 1 88 LSCI Section V HTR V value is still good The V can be checked by measuring ap proximately 28 V from TP5 to The V value will be approximately 40 volts if a W60 option is in stalled If the Voltage across R28 is cor rect and there is no heater power on any range then 012 or U13 are probably bad and both should be replaced Before it is decided that 012 and 013 are bad be sure the relays K1 K4 are working If they can be heard clicking as they are turned off and on then they are probably operating The relays are turned off and on by selecting dif ferent heater ranges If there is approximately 24 volts from pin 4 to pin 8 of U12 then replacing U13 should solve the heater problem If there is 18 volts from pin 4 t
44. to its Clips and remove the cover Remove COPYRIGHT 12 87 Model 8053 RS 232C Interface Table 8053 4 Model 8053 RS 232C Interface Specifications Timing Format Asynchronous Transmission Mode Half Duplex Baud Rate 300 or 1200 Bits sec Factory set to 300 Bits per Character 7 excluding start stop or parity bits Parity Enable Enabled Disabled Factory set Enabled Parity Select Odd or Even Factory set Odd Number of Stop Bits lor 2 Factory set to 1 Data Interface Levels Transmit or receive using EIA voltage levels 8V and 8V the two back panel mounting screws that secure the J2 blank cover plate to the interface opening and remove the plate 4 Remove the red jumper JMP6 on the Microprocessor Board This is the jumper closest to the front edge of the microprocessor card 5 Turn on DIP Switch 3 of switch package S4 on the 805 main board 6 Plug the internal interface cable attached to the 8053 into option connector JC on the 805 main board with the locking tab configured properly 7 Position the 8053 interface 25 pin RS 232C connector in the J2 opening on the 805 back panel and secure it in place with the screws removed earlier note the transformer wires that run along the rear edge of the transformer may have to be adjusted to install the 8053 8053 3 Model 8053 RS 232C Interface 8 Install the calibration cover by reversing procedure 3 9 Install the top p
45. window This address can be changed by the user and verifi cation is always given on power up Note that any changes in the IEEE 488 address are only recognized and read by the in strument on power up 3 The unit then displays for INPUT A the module associated with that input in the display window as well as the SENSOR A ID curve number in the HEATER window 4 The unit then displays the same information for Input B 5 The unit then goes into normal operation 3 7 DISPLAY SENSOR Block 3 7 1 DISPLAY SENSOR Input The choice of Display SENSOR input is made by pushbuttons on the front panel which allows the user to display either input and indicate by an annunciator the sensor input which is currently displayed 3 7 2 Units Select The UNITS key is used to change the display and control units The key is located below the lower right corner of the display window Pressing the key scrolls the units 3 2 Model 805 i e K F V C Ketc The se lected units are displayed to the right of the HEATER power dis play The units display light is blinking to indicate the frequency of display update If a resistance module is present the ohms in dicator comes on in place of V The temperature units for both inputs are selected by the units button and are kept the same to avoid confusion 3 7 3 Display SENSOR Units 3 7 3 1 Voltage Units In the voltage mode the display has a resolution of 1 millivolt and a
46. 0 954 1192 2625 1162 2005 5 RH Lj eH 194 2005 1192 2895 isd esa esa 5 SY 3TQHLN03 2154 5 L Nld 0 vl Nid AS 5 90 L Buy SN v 5n f 3108 Y SN3S 1 02 ezsa 8 8 SNIS LNO3 5 lt CY Gd lt AD H AD P AD WU Och SN3S dSIQ 8154 9194 6805 554 01443 0 260 83 01 I 1 U3 i I TXD ER RXD REPLACEABLE PARTS LIST A5 MICROPROCESSOR CARD 101 137 104 511 104 276 104 528 CAP TANT 1OMF 35V 119D106X0035DBl1 IC MICROPROCESSOR P80c31 IC 4 16 LINE DECODER 74HC154 IC 8 BIT LATCH UPD71082C IC EPROM PROGRAM 27C256 IC 8Kx8 NOVRAM DS1225Y IC 8 BIT MULTIPLEXER DM81LS95 IC O D HEX INVERTER 74HCO5N IC QUAD DUAL INPUT NAND 74HCTOO IC VOLTAGE SUPERVISOR TL7705ACP IC 5 0MHZ OSCILLATOR 104 661 104 653 104 310 104 209 104 201 104 775 104 750 HPH HHBHHHBHEBRR 1 30 13345 5 9 L _ 8 caquvouu 16 98 5 8 ON 8n 9 n 35Y I SHO0112YdY2 4 0 JN 29 S vID 1 CID C 99 0 11 38 amp JILVW3HIS QUYI 8055320440421 4 SONI St rl 901
47. 0K accuracies range from 0 25K for band 11 to 1K for band 13 For more demanding requirements DT 470 Sensors can be individually calibrated to accuracies of better than 50 millikelvin depending on temperature range Diode sensor voltages are digitized with a resolution of 100 microvolts out of 3 volts full scale For the display temperature is rounded to 0 1 kelvin above 100 kelvin and to 0 01 kelvin below 100 kelvin For greater precision individual sensor calibrations can be accom modated through the 8001 Precision Calibration Option which programs the instrument with a particular response curve The algorithm within the instrument interpolates between data points to an inter polation accuracy which exceeds 0 01K over the entire temperature range of the Precision Option The analog to digital converter is accurate to plus or minus the least significant bit which for the 470 Series sensor results in an uncer tainty of 1mK below 28K and 45mK above 40K with a transitional between the two tempera tures Therefore at temperatures below 28K the overall system accuracy the sum of the instrument accuracy 11 and that of the calibration itself Shore calibrations are typically better than 20mK within this region is region 1 1 Section I 0 03K Above 28K system accuracy gradually moderates to a typical value of 75mK above 40K See the Lake Shore Cryotronics Inc Low Temperature Calibration Serv
48. 1 4 15 MSB 1 15 LSB 123 4 5 6 7 8 Switch Nos on SENSOR ID 1 2 4 8 8 4 2 1 Binary Weighting t pigital Filtering kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk Functional Description A and B Input Information 61 62 C3 Ca AC5Cg N1N5 BC7Cg 21 characters plus up to 2 terminators where is the Display Sensor A or B is the Control Sensor A or B is the Set Point Units K C F V or R is the Display Units K C F V or R the A ID 00 through FF the A Curve Number 00 through 15 the B ID 00 through FF the B Curve Number 00 through 15 COPYRIGHT 4 88 LSCI 4 11 Section IV are using the DT 470 Curve 10 the difference is that INPUT A is set for an upper limit of 325K and INPUT B is set with an upper limit of 475K 4 9 THE CONTROL COMMANDS 4 9 1 The Set Point Value The S Command The set point is sent from the controller to the Model 805 ina free field format of which examples are given in Table 4 8 Note that the sign only has to be present if negative celsius or fahrenheit settings are desired Although the limits on the input range above the values possible for the various sen sors the set point is limited by the input module present as shown in the table Note that the temper ature limit can be different for the DT 470 depending on whether curve number 02 324 9K or curve number 04 474 9K has been selected If a number above the limitatio
49. 1 mV RTDs to 0 1 ohm Response Time electronics Less than one second to rated accuracy under continuous operation Heater Output Monitor LED display continuously shows heater output as a percentage of total output power with a resolution of 1 Temperature Control Setpoint Digital thumbwheel selection in kelvin celsius fahrenheit ohms or volts same units and resolution as display Control Stability Better than 0 01K below 20K with a diode sensor in a properly designed system Control Modes Proportional gain and integral reset set via front panel Model 805 Temperature Controller Specifications Heater Output Real time analog output variable D C current output 25 watts 1A 25V com pliance 25 ohm heater standard 60 watts available with W60 option Three output ranges can be selected from front panel from the HI mode setting heater output can be attenuated in two further steps of a decade each General Dimensions 216mm wide x 102mm high x 381mm deep 8 5 x 4 x 15 Style L half rack package Weight Net weight 9 kg 20 lbs Power Selectable for 100 120 220 240 volts 596 50 60 Hz 75 watts Accessories Supplied Mating connector for sen sor input monitor connector Operations Manual detachable line cord Options Available 8001 Precision Option Custom programmed read only memory PROM which improves specified accuracy to 0 1K or better over a given calibration
50. 1mA x 10 Sensor DIN Resistance 43760 x0 1mA x 10 No Sensor Not Standard Resistance Recom 0 012 Curve x 3mA mended x 10 Error lt 1 for B lt 24 2T and T gt 40K PT 100 Series 1000 ohm platinum 0 30000 0 050 RF 800 Series 27 ohm Rh Fe 0 100 0 0030
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52. 3 5 4 9 23 52499 25 67000 27 82000 29 95000 32 08087 34 16000 36 25000 38 34000 40 42000 42 49000 ere p LJ 8 9 9 100 105 110 115 12 12 13 266 46000 65 00000 67 01000 69 02000 71 03000 73 03000 75 04385 77 02000 79 00000 80 98000 82 96000 84 94000 86 92000 88 90000 90 88000 92 86000 269 83000 271 51000 273 19000 274 87000 276 56633 278 22000 279 88000 281 55000 283 21000 284 87000 286 53000 288 18000 289 83000 APPENDIX B Sensor Curve 18 Character Information Line Reserved Character Definitions Each Sensor Curve has an 18 character information line Some of the characters are reserved for specific operations The definitions are as follows 1 2 3 Curve type L Unit performs Lagrangian calculations on the data Any other character Unit performs Straight Line interpolation on the data Temperature Range Setpoint Limit 0 Up to 324 9 K 1 Up to 374 9 K 2 Up to 474 9 3 Up to 799 9 4 Up to 999 9 K Sensor type used for front panel curve entry here alphanumerics cannot be entered with the standard numeric keypad 0 DT 470 Series Silicon Diode Sensors 1 DT 500 Silicon Diode Sensors 2 TG 100 TG 200GaAs and GaA As 3 100 Ohm Platinum Resistance Thermometers PRT s 4 1000 Ohm Platinum Resistance Thermometers PRT s
53. A IBM Example The following is the same program written for the National Instruments GPIP PC2 IEEE 488 Card for IBM PCs and Compatibles using Quick Basic 3 0 10 CLEAR 60969 BASIC DECLARATIONS 20 IBINIT1 60969 This number is different for each computer 30 IBINIT2 IBINIT1 3 40 BLOAD bib m IBINIT1 50 CALL IBINIT1 IBFIND IBTRG IBCLR IBPCT IBSIC IBLOC IBPPC IBBNA IBONL IBRSC IBSRE IBRSV IPPAD IBSAD IBIST IBDMA IBEOS IBTMO IBEOT IBRDF IBWRTF 60 CALL IBINT2 IBGTS IBCAC IBWAIT IBPOKE IBWRT IBWRTA IBCMD IBCMDA IBRD IBRDA IBSTOP IBRPP IBRSP IBDIAG IBXTRC IBRDI IBWRTI IBRDIA IBWRTIA IBSTA IBERRZ IBCNT 70 TEMPS 805 80 CALL IBFIND TEMPS TEMP 805 is IEEE address label set up in IBCONF Required command to address 805 90 AS SPACES 255 255 largest transfer allowed by IBM format 100 INPUT B Entered from keyboard while running 110 13 CHR 10 Add CR and LF to command 120 CALL IBWRT TEMP BS Send command to 805 130 CALL IBRD TEMP AS ENTER from 805 SEE NOTE BELOW 140 PRINT A Display received information on screen 150 A SPACES 255 Clear AS 160 GOTO 110 170 END 180 REM The 805 will return the data requested but if the command input 190 REM does not request new information the 805 will give the information 200 REM last requested 4 16 COPYRIGHT 4 88 LSCI Model 805 Section IV 4 11 3 National Instruments QUICK BASIC IBM Exampl
54. EL 8053 RS 232C INTERFACE 8053 1 INTRODUCTION This Section contains information pertaining to the Model 8053 RS 232C Interface for the Model 805 Temperature Controller Included is a description specifications installation operation and maintenance information 8053 2 DESCRIPTION The 8053 RS 232C Interface is designed to be installed in a Model 805 and provide an interface with an external RS 232C instrument such as a computer modem or CRT The interface operates in a half duplex mode it can only transmit and receive information direction at a time and data transmission is asynchronous each character is bracketed by start and stop bits that separate and synchronize the transmission and receipt of data The baud rate is switch selectable at 300 or 1200 baud and the interface maintains EIA voltage levels for data transmission Figure 8053 2 gives a transmission format which shows the data bits framed by the start stop synchronization bits The data is transmitted using two voltage levels which represent the two binary states of the digit A logic 0 or SPACE is 3 to 12 VDC A logic 1 or MARK is 3 to 12 VDC When data is not being transmitted the line is held low MARK state When the transmission device is ready to send data it takes the line to the high SPACE state for the time of one bit This transition is called the start bit The remaining data 15 then transmitted If a parity
55. Keyboard Interactive Program A 4 11 2 National Instruments GWBASIC or BASICA IBM Example 4 11 3 National Instruments QUICK BASIC IBM Example 4 11 4 HP86B Bus Commands Program e s o PORA bh gt gt GAS 10 10 10 10 oo Mo Ui e QN IP SECTION V MAINTENANCE 5 1 INTRODUCTION TM 5 2 GENERAL MAINTENANCE e o e e o 9 e e se on 5 3 FUSE REPLACEMENT lt s e a v 5 4 LINE VOLTAGE SELECTION we s 5 5 OPERATIONAL CHECKS s s o ww 5 5 1 Test Connector gt Neh ta Lt rre ue 5 5 2 Operational Test Procedure M 5 5 3 Current Source Check s s s o o oo 5 5 4 Temperature Display E ou e 5 5 4 1 Determine Input Type CA IRE 5 5 4 2 Check Units Display e s 5 5 4 3 Check Sensor Units Reading 5 5 4 4 Check Temperature Reading 5 5 4 5 Check Input B lt s lt lt oo 5 5 5 Heater Output Test lt lt s ew 5 5 5 1 Heater Output Conditions 5 5 5 2 Test Setup gt s 2 5 5 5 3 The Heater Display s eo 5 5 6 Checking Gain and Reset s s s s s oo 4 8 4 10 4 10 4 10 4 10 4 10
56. LER 60 DISP B DISPLAY DATA 70 GOTO 30 RETURN FOR MORE 80 END Example 2 HP 86B Computer Half Duplex with Handshake Figure 8053 4 shows the adapter cable for Half Duplex with handshake communications with an HP 86B Serial Interface The arrows indicate the source and direction of signal flow with Model 805 The Auto Handshake capability of the HP 86B Serial Interface must be enabled The addition of the program line 16 CONTROL 10 2 7 ENABLE DSR DCD CTS to the program above enables the HP to receive and transmit in a handshake mode Example 3 General Serial Interface Interconnection The HP 86B Serial Interface Standard cable configuration already takes care of some of the interface interconnection problems to route signals to their proper pins Figures 8053 5 and 8053 6 give more general interconnection configurations for Half Duplex with and without Handshake Figure 8053 5 General Serial Interface Interconnection for Half Duplex with Handshake Figure 8053 4 Handshake Connector to HP 86B Half Duplex Protective Protective Ground Ground Transmitted Transmitted Data Data Received Received Data Data Request to Request to Send Send Clear to Clear to Send Send Data Set Data Set Ready Ready Signal Signal Ground Ground Carrier Carrier Detect Detect Data Data Terminal Terminal Ready Ready Computer 805 8053 6 Protective Ground Transmitted Data Received Data Req
57. Model 805 The Output Statement commands given in Tables 4 7 and 4 8 will result in the requested data being output immediately following the reception of the EOL sequence If more than one Output Statement command is given the last one received will be acknowledged Programming Codes and Output Statements can be sent in the same command string For example the command string 24 5P40120R3 would result in the Set Point being updated to 24 5 the Gain to 40 the Reset to 20 and the Heater Range to IO No Output Statement was given so no response will be output by the interface The command string 24 5P40120R3WO will result in the WO contents being output by the interface Refer to Section 4 for a detailed discussion of the Output Statement commands There are three errors that could be detected by the 8053 interface as defined in Table 8053 5 Detection of an error does not effect the operation of the interface The software that interprets the data tries to match the character input to the possible command inputs and processes the command The error is also transmitted by the interface the next time it is asked for a response The error is transmitted in addition to the Output Statement data output For example if a framing error were detected in a command string P50W3 the interface might respond with Err12 50 20 3 047 CR LF COPYRIGHT 12 87 Model 805 If the error were detected in the transmis
58. Ni is O through 5 Forms of the Heater Current 0 0 1A kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk Request Functional Description W3 Control Parameters N1N5N3 N4N5Nc N7 Ng NgN109N44 13 characters plus up to 2 terminators where N1N2N3 N4N5Ng N NgNoNi9 is the Gain Value is the Reset Value is the Heater Range is the of Heater Power or Current out If the user were to monitor the IEEE 488 Bus when the computer sent its command string over the Bus the following IEEE 488 Format would be observed U S123 4P45I3OR4W1 CR LF The Universal Unlisten Command is sent so that no other instru ments on the Bus will eavesdrop on the Bus and assume that the data being sent is for their attention The Model 805 s Talk Address L is sent to unaddress any existing 4 14 TALKER Note that the BUS CON TROLLER could have designated another instrument as the TALKER Therefore to keep the format consistent it must send a Talk Address even when the Model 805 is going to be that TALKER The Listen Address must be sent to tell which instrument on the Bus is to receive the Data String Note that TERM1 TERM2 have been indicated to be CR LF carriage return correct terminators computer example line feed these are the for the HP COPYRIGHT 4 88 LSCI Model 805 Note that the string P45I30P40 would result in a gain of 40 and an integral
59. P Set Point A 10 17 Display Set Point Reading DISP Space a Line OUTPUT 712 W1 A and B Input information ENTER 712 A Ask for string W1 DISP W1 AS Display string W1 DISP Space a Line OUTPUT 712 W2 Interface Status ENTER 712 A Ask for string W2 DISP W2 AS Display string W2 DISP Space a Line OUTPUT 712 W3 Control Data Gain Reset etc ENTER 712 A Ask for string W3 DISP W3 Display string W3 DISP Gain A 1 3 Display Gain setting COPYRIGHT 4 88 LSCI 4 17 Section IV 220 230 240 250 260 270 280 290 300 310 320 330 340 350 360 370 380 DISP Reset A 5 7 DISP Heater Range A 9 DISP Power A 11 13 DISP OUTPUT 712 WS ENTER 712 A DISP WS AS DISP DISP OUTPUT 712 WP ENTER 712 A DISP WP AS DISP OUTPUT 712 WI ENTER 712 A DISP WI A END Model 805 Display Reset setting Heater Range Power Space a Line Set for WS Ask for string WS Display Sensor Reading Space a Line Space a Line Set for WP Ask for set point data Display string WP Space a Line Set for WI Ask Input Cards and Options Display string WI COPYRIGHT 4 88 ISCI Model 805 Section SECTION MAINTENANCE 5 1 INTRODUCTION This section contains information necessary to maintain the Model 805 General maintenance fuse replacement line voltage selection and performance testing is con tained in this section
60. POWER OPTION e lt lt INTERFACE OPTIONS 6 5 1 Model 8053 RS 232C Interface ets 6 5 2 Model 8054 IEEE 488 Interface 6 5 3 Model 8055 Analog Output Option Standard Curves Error Codes e 5 7 1 2 5 7 1 3 Display Voltage or Resistance 5 7 1 4 Units Display is Correct 5 7 3 3 The Sum of the Gain the Reset Bs 9 9 9 c S B PW O But Temperature Q 9 9 6 A RON SD IND IND IN ND HD EB ED RP PPP g 9 9 9 9 C 1 COPYRIGHT 4 88 LSCI LIST SECTION I Table 1 2 Specifications Model 805 Temperature Controller TABLES AND ILLUS GENERAL INFORMATION Input Conversion Modules Model 805 SECTION II INSTALLATION Table Figure Table Figure Figure Table 2 1 2 1 2 2 2 2 2 3 2 3 SECTION III 3 1 3 1 3 2 3 3 3 2 3 3 Figure Table Figure Figure Table Table SECTION IV Table Figure Table Table Table Table Table Table Table Table 4 1 4 1 4 2 4 3 4 4 4 5 4 6 4 7 4 8 4 9 Line Voltage Selection Typical Rack Configuration e 71 SENSORS MONITORS Connections Sensor Connections e e s o Sensor ID Definitions
61. SOR A ID 8 DIP SW 765808 INTERNAL 4 DIP SW 76SB04 4 STATION THUMBWHEEL SW 4A216056GDA CONNECTOR 25 50 342 050 520 202 CONNECTOR 18 36 342 036 520 202 REGULATOR 5V MC7805ACT REGULATOR 12V LM7812CT REGULATOR 15V LM7815CT REGULATOR 15V LM7915CT REGULATOR 5V LM7905CT PORT EXPANDER 82C55A 5 KEYBD INTERFACE P8279 5 OP AMP MAX430CPA 102 095 104 310 102 043 104 210 102 036 104 355 104 465 104 005 102 074 POWER MOSFET ON HSR IRF9130 8 BIT MULTIPLEXER DM81LS95AN VOLTAGE REFERENCE 6 95V LM399H IC HEX INVERTER O C 7406 IC REGULATOR ON HSR LM317HVK STEEL IC OPTOCOUPLER 74016000 IC A D CONVERTER TSC500CPE IC OP AMP LM308N MOSFET P CHANNEL 3N163 CABLE MB TO Ul ON HSR N NN WED W F m N P NE Q N A gt E EI UlmPp XU12 19 106 571 SOCKET 3 M8080 1G402 Igu s s 1 68 L19 8 v Lv 21 ONT Y3HOd ONIGNIM AUYUNO23S TWNOILICGY NVOG NIYH 568 13q0H 32Y1 ANO SLSIX3 2X1 I 1310N SOINOHIOAN 3u0HS AN Cte 079 5 WIR 959 Ct OA IA MAHLTEHT 8 52 Aw 613 8 59 ASI 859 WS 8 212 ISS AST 0 2 A 1 9 St 18 53 tP IND fps 331113 UY NO 31Y907 93 NJ Id Pp Ss IA A9vs88L NIS 3 NO 31y907
62. Temperature Controller This manual also contains performance nd calibration procedures schematics component layouts and a replaceable parts list This section contains general information for the Lake Shore Cryotronics Inc 805 Temperature Controller Included is instrument description specifica tions instrument identification option and accessory information 1 2 DESCRIPTION The 805 Temperature Controller is a microprocessor based instrument which provides true analog control It accepts inputs from up to two sensors and displays the tempera ture with up to 4 digits of resolution in K C or F It displays voltage for diodes to 1 millivolt and ohms for resistors to four places The dual sensor input allows the user to monitor temperature at more than one point Sensor select pushbuttons on the front panel enable the user to display either input at will The system control sensor is selected via a rear panel toggle switch with the choice indicated on the front panel This choice is independent of display status The Model 805 is direct reading in temperature when used with the Lake COPYRIGHT 10 87 INFORMATION Shore DT 470 Series Temperature Sensors All DT 470 Sensors follow the same temperature response curve Four bands of tracking accuracy are offered so that sensor selection may be made with both technical and economical considerations for any given application Low temperature 2 to 10
63. UTION Verify that the AC Line Voltage Selection Wheel Figure 3 2 Key 1 located on the rear panel of the Model 805 is set to the AC voltage to be used Table 2 1 and that the proper fuse is installed before inserting the power cord and turning on the instrument If a W60 option is present the fuse ratings in Table 2 1 double 2 3 2 Power Cord A three prong detachable 120 VAC power cord which mates with the rear panel UL IEC ICEE Standard plug is included with 805 2 3 3 Grounding Requirements To protect operating personnel the National Electrical Manufacturer s Association NEMA recommends and some local codes require instru ment cabinets to be grounded This instrument is equipped with a three conductor power cable which when plugged into an appropriate receptacle grounds the instrument Line Voltage Selection Line Voltage Volts Operating Range Volts 90 105 108 126 198 231 216 252 Section II Model 805 Figure 2 1 Typical Rack Configuration 2 3 4 Bench Use using the optional RM 3H1 or RM 3H2 rack mounting kit A typical RM The 805 is shipped with feet and a 3H1 rack kit installations with tilt stand installed and is ready handles is shown in Figure 2 1 for use as a bench instrument The front of the instrument may be 2 3 6 Sensor Input Connections elevated for convenience of opera tion and viewing by extending the The Model 805 is supplied with a 24 tilt stand pin rea
64. anel 8053 6 OPERATION The 8053 RS 232C Interface has a 256 character FIFO buffer for input commands The interface accepts commands the same as for the IEEE 488 Interface until it sees the End of Line EOL sequence The 8053 requires carriage return line feed CR LF or just line feed LF as its input EOL and transmits carriage return line feed CR LF as its output EOL Following the EOL Sequence the command string is processed Operation of the Interface link is initiated by the computer The computer will transmit either a Program Code or an Output Request to the 8053 Interface The 805 will respond to the Output Request with the appropriate response or with the response and an error message if an error was detected The interface responds to Program Code Commands storing the variables input The Programming Codes given in Tables 4 4 and 4 5 are input only and do not result in a response from the interface The Codes TN and 2 will be accepted and updated even though they have no relevance to the interface the EOL terminator sequence 45 always CF LF and there is no EOI status The MN command can be considered the OFF LINE Local and ON LINE Remote or Remote with Local Lockout states When OFF LINE Local parameters such as SENSOR ID as well as Gain and Reset are updated from the hardware settings while ON LINE these parameters can be updated from the computer only 8053 4
65. ay CONTROL SENSOR SET PO INT 9 9 GAIN 9 9 9 HEATER HEATER POWER Range 3 9 IOCAL REMOTE SELECTION 3 10 CONTROL Switch REAR PANEL DESCRIPTION 3 11 HEATER Power Output Terminals U Ws 3 12 SENSORS MONITORS 3 13 SENSOR CURVE SELECTION 3 13 1 Display of Accessed Curve 3 13 2 The Precision Option Table 3 14 SENSOR ID Switches s ee es SECTION IV REMOTE OPERATION 4 7 IEEE 488 INTERFACE OPTION 8054 GENERAL IEEE SPECIFICATIONS AND OPERATION INTERFACE CAPABILITIES oo ee Se MODEL 805 IEEE 488 ADDRESS SWITCH er s Terminating Characters delimiters TALKER and or LISTENER Configuration The IEEE 488 INTERFACE bus address IEEE 488 BUS COMMANDS s 4 4 1 4 4 2 4 4 3 dunno P gt dt Uniline Commands Universal Commands Addressed Commands Unaddress Commands UP Jon Ue Device Dependent Commands eus Talker and Listener Status OGRAMMING INSTRUCTIONS e e H od aba RET 4 7 3 Commands and Requests T nee SETUP COMMANDS AND REQUESTS EOI Status The ZN Command Interface Mode The MN Command 4 7 2 1 local 4 7 2 2 Remote 4 7 2 3 Local Lockout Terminating Characters The TN COPYRIGHT 4 88 LSCI 5 Comma
66. been deter mined for this unit 2 6 REPACKAGING FOR SHIPMENT If the Model 805 appears to be operating incorrectly refer to the Section V If these tests indicate that there is a fault with the instrument please contact LSCI or a factory representative for a returned Goods Authorization RGA number before returning the instru ment to our service department When returning an instrument for service photocopy and complete the Service Form found at the back of this manual The form should in clude COPYRIGHT 10 87 Section II 1 Instrument Model and Serial 45 2 User s Name Company Address and Phone Number 3 Malfunction Symptoms 4 Description of System 5 Returned Goods Authorization If the original carton is avail able repack the instrument in a plastic bag place it in the carton using original spacers to protect protruding controls Seal the carton with strong paper or nylon tape Affix shipping labels and FRAGILE warnings If the original carton is not available pack the instrument sim ilar to the above procedure being careful to use spacers or suitable packing material on all sides of the instrument This Page Intentionally Left Blank Model 805 Section III SECTION III OPERATING 3 1 INTRODUCTION This section contains information and instructions concerning the operation of the Model 805 Tempera ture Controller Included is a description of the front and rear panel controls a
67. ce should match the monitor reading and the voltage across the sensor The voltage across the sensor will match the display for the 6 volt input cards except the monitor reading will be 0 458 times the sensor reading If the readings do not match then the A D should be calibrated If display and sensor voltage is correct but monitor voltage is incorrect the input may control at an offset or not at all If the sensor voltage matches the monitor voltage and the display voltage is incorrect than the A D needs to be calibrated Follow the input card calibration procedure in the manual The monitor voltage is used as the control voltage To see the true control stability of the instrument compare the monitor voltage of the control input to the setpoint voltage Most system can be tuned so that the control stability exceeds the resolution of the display 5 7 1 4 Units Display is Correct But Temperature Reading is Incor rect If the units display match 5 5 Section es the voltage or resistance value of the sensor but the temperature display is incorrect then check the curve selected Follow the steps given in Section 2 3 8 to be sure the correct curve has been select ed If the correct curve has been selected by the sensor ID switches on the back panel then the next step if the temperature display is still wrong is to check the curve that the Microprocessor is reading a With the 805 this can be done by pressing the
68. ch es which provide a continuous indication of the set point value enable the user to quickly and easily determine whether his system is at control temperature The set point is in the same units as is the Display sensor kelvin celsius fahrenheit or volts ohms COPYRIGHT 10 87 Model 805 The control section of the 805 provides two term temperature control Proportional GAIN and integral RESET are individually tuned via front panel potentio meters The gain and reset settings are in nominal log per cent Analog heater output of the 805 Temperature Controller is a maximum of 25 watts when a 25 ohm heater is used A digital meter on the front panel of the 805 continuously shows the heater power output as a percentage of output range Thus the user can conveniently monitor power applied to his system To accommodate systems which require lower heater power the maximum heater output of the 805 can be attenuated in two steps of a decade each When greater power output is required an optional 60 watt power output stage 15 available W60 which is designed for a 25 ohm load It is rated at a nominal 1 5 amperes with a compliance of 43 volts An optional IEEE 488 Model 8054 or RS 232C Model 8053 interface is available for the 805 Either interface can be used to remotely control all front panel functions Section I 1 3 INPUT CONVERSION MODULES The input conversion modules for the 805 Controller ar
69. controlled over the IEEE 488 interface In Remote the front panel controls are disabled except the LOCAL button and are then controllable over the IEEE Bus The instrument s initial set up is determined by the front panel settings at the time when the instrument is placed into Remote The Model 805 may also be placed into remote by pressing the button on the front panel for more than one second or addressed to talk by the BUS CONTROLLER 4 7 2 3 Local Lockout This message 2 Table 4 6 disables the Model 805 s Local Front Panel controls including the LOCAL button The message is in effect until the message is cleared over the Bus or power is cycled Many IEEE 488 cards for IBM PC s Table 4 5 Control Data Gain Reset etc Display Sensor Data Display Control Sensors and Set Point Data Model 805 automatically place addressed instruments into Local Lockout To be able to place the Model 805 into Remote without Local Lockout the user may need to reconfigure his IEEE 488 card 4 7 3 Terminating Characters The TN Command Terminating characters TO 1 T2 and T3 Table 4 6 are used to indicate the end of a record Record terminators are used when the unit has completed its message transfer Switch 1 of the IEEE address defines the terminator status If switch 1 is OPEN 0 the terminator status is defined as TO CR LF and terminator status can not be changed over the i
70. d sequence FOK sent by the BUS CONTROLLER to the Model 805 is used to select kelvin as the set point units The IEEE 488 bus actually treats these commands as data in that ATN is high when these device dependent commands are transmitted 4 5 6 TALKER and LISTENER Status For the Model 805 to be a LISTENER it has to be in REMOTE and can be returned to LOCAL with the device dependent command or GTL addressed command as desired For most but not all computers the Model 805 as a TALKER does not have to be placed in REMOTE operation but can remain under LOCAL control This allows the user to collect data while maintaining front panel control The HP computers will allow this mode of operation If your computer automatically places the Model 805 in remote and keeps it in remote after the transmission is over sending the additional command MO after the request for data will return the Model 805 to IOCAL 4 6 PROGRAMMING INSTRUCTIONS The following discussion references the Modle 805 at address 12 The allowable address codes are given in Table 4 2 Therefore its Talk ASCII Code is L and its LISTENER ASCII Code is comma The controller referred to in the following discussion is the BUS CONTROLLER and is normally a digital computer It should not be confused with the temperature controller on the bus Model 805 Set the IEEE Address of the Model 805 to 12 by making Switches 5 and 6 CLOSED 1 4 7 and 8 OPEN
71. e IEEE 488 TEST PROGRAM Quick Basic 3 0 Example THIS PROGRAM WAS WRITTEN FOR THE NATIONAL INSTRUMENTS GPIP PC2 IEEE 488 CARD FOR IBM PC AND COMPATIBLES This program will allow the user to communicate with Lake Shore s instruments interactively from the keyboard of an IBM compatible computer which has a National Instruments GPIB PC2 installed common shared IBSTA IBERR IBCNT TEMPS dev12 call IBFIND TEMP TEMP Required command to address instrument A space 10000 Loop1 input B Entered from keyboard while running BS BS chr 13 chr 10 Add CR and LF to command call IBWRT TEMP B Send command to instrument call IBRD TEMP A ENTER from instrument SEE BELOW FOR I 1 to 10000 C MIDS A 1 1 IF C CHR 13 THEN Loop2 PRINT C NEXT I Loop2 PRINT A space 10000 Clear AS GOTO Loop1 END Lake Shore Cryotronics instruments will return the data requested but if the command input to the instrument does not request any information the instrument will respond with the information last requested 4 11 4 HP86B Bus Commands Program The 210 following program is for the HP86B and exercises the various bus commands REM Set IEEE Address to 12 REM Address Switch 1 OPEN 0 to get 68 LF DIM A 25 For longest string OUTPUT 712 WO Note WO ENTER 712 A Ask for string WO DISP WO AS Display string WO DISP Display Sensor A 1 8 Display Sensor reading DIS
72. e listed in Table 1 1 1 4 SPECIFICATIONS Instrument specifications are listed in Table 1 2 These specifications are the performance standards or limits against which the instrument is tested Option ports are designed into the 805 to ease the addition of interfaces and outputs The Model 805 has two option ports which allow up to two options to be used simultaneously see limitations below The options are easily installed by the user thus units can be changed or upgraded to satisfy changing requirements Only one computer interface can be installed in the 805 due to space limitations in the 805 rear panel The Model 8055 Analog Output option is available to provide an analog output of 10mV K independent of the display temperature units If the display is in sensor units the output for diodes is 1V V for 100 ohm platinum 10mV ohm for 1000 ohm platinum 1mV ohm for rhodium iron 100mv ohm arrassrGnarraa n arar a P E P pL V4 IZI ZZVVWU Table 1 1 Diode or Resistance Sensor ordered separately DIODE SENSOR CONFIGURATION Diode Excitation DC current Source 10 microamperes 0 005 AC noise from current source less than 0 01 of DC current Diode Voltage Temperature Range 0 000 to 3 000 volts in standard configuration Dependent on Sensor selected DT 470 SD covers temperature range from 1 4 to 475 COPYRIGHT 10 87 Input Conversion Modules Model 805 Temperature Control
73. ed in this Section are the Model 8054 schematic replaceable parts list and illustrated component layout Refer to the manual for ordering information 8054 1 xsi SE REPLACEABLE PARTS LIST 8054 IEEE 488 INTERFACE OPTION LSCI Part Number Description PART NO PART NO 106 428 CABLE 8054 TO MB 106 310 24 PIN RA D STYLE 57 92245 12 CONNECTOR IEEE 105 408 SWITCH 8 POS 7658085 104 712 TMS9914ANL 104 710 IEEE SUPPORT CHIP SN75160AN 104 711 IEEE SUPPORT CHIP SN75161AN 104 310 8 BIT MULTIPLEXER DM81LS95AN 3331508 18 18 5 6 311vu3H23S NOI1dO 3331 308 WAOU INI SOINONLOAN3 3YOHS 3MY1 SS3uddv 3331 15 5 come 5 lt rera 06 3 aav 3331 52 lt 52 3 Qu 21 97 eav Sizar tv lt C1 30 ear cov 6 3F rav 6 krl sav 5 5 sav lt 5 Lav tn 66591 8 51 5 2v lt 81 37 tv 21 30 2v Ned 12 2 12 3331 lt v1 9r 13534 8 2 BINT 3331 53 815 el 4 y 8580802888 This Page Intentionally Left Blank Model 805 MODEL 8055 8055 1 INTRODUCTION This section contains information pertaining to the Model 8055 Analog Output for the Model 805 Te
74. el 805 ohms yields 10 watts A larger heater resistance can also be used with the 805 For example since the compliance voltage is slightly above 25 volts a 50 ohm heater would result in a maximum p power output of 12 5 watts 25 2 50 optional W60 output power stage of 60 watts is available for the 805 This output is also set up for a 25 ohm load with a maximum current of 1 5 amperes at a com pliance voltage of approximately 43 volts Lake Shore recommends a 30 gauge stranded copper lead wire Model ND 30 for use as lead wires to the heater 2 4 OPTIONS 2 4 1 Model 8053 RS 232C INTERFACE Option The RS 232C option is described in Section VI of this manual 2 4 2 Model 8054 IEEE 488 INTER FACE Option The IEEE option is described in Section VI of this manual 2 4 3 Model 8055 Linear Analog Output Option Linear Analog Option is described in Section VI of this Manual 2 5 ENVIRONMENTAL REQUIREMENTS WARNING To prevent electrical fire or shock hazards do not expose the instrument to excess moisture 2 5 1 Operating Temperature In order to meet and maintain the specifications in Table 1 1 the 805 should be operated at an am bient temperature range of 23 5 C The unit may be operated within the range of 15 35 with less accuracy COPYRIGHT 10 87 Model 805 2 5 2 Humidity Altitude The 805 is for laboratory use Relative humidity and altitude specifications have not
75. el on these lines inhibits transmission by the Interface Clear to Send CB indicates to the Interface that data transmission is allowed Internally pulled up to maintain ON state when left disconnected Data Set Ready CC indicates to the Interface that the host computer or terminal is not in a test mode and that power is ON Signal Ground AB this line is the common signal connection for the Interface Received Line Signal Detector CF this line is held positive ON when the Interface is receiving signals from the host computer When held low OFF the BB line is clamped to inhibit data reception Internally pulled up to maintain ON state when left disconnected Data Terminal Ready CD asserted by the Interface whenever the 805 8053 power is ON to indicate that the Interface is ready to receive and transmit data 8053 2 tParity Bit optional 8053 3 Switches Configuration of Dip 8053 3 1 Selection of Baud Rate The Model 8053 has a field selectable baud rate using DIP switch package S1 switches 7 300 Baud and 8 1200 Baud The Baud rate is selected by closing the switch position for the desired baud rate and making sure the other position is open 8053 3 2 Word Structure Selection The word structure is determined by switch settings for character length parity and stop bits using DIP switch package S1 Switches 1 6 on the Interface Card Refer to Table 8053 3 for sett
76. elow the temperature reading 5 7 3 2 Reset Set up the control ler similar to step 1 with the gain voltage at about 3 volts The reset voltage is available on TP4 If the reset is now turned on the value should increase to the pres ent gain voltage TP3 The rate at which the value increases de pends on the reset setting The higher the reset setting the faster the voltage will increase 5 7 3 3 The sum of the Gain and Reset The sum of these two sig nals is the analog out signal This is a 0 to 7 3 volt signal that determines the amount of heater output for the selected heater scale 5 7 4 Checking the Heater Circuit To test the output stages of the controller place a test resistor into the control input and set the setpoint above the control input Place a 10 ohm 10 watt to 25 ohm 25 watt load resistor across the heater terminals of the controller and select the HI heater level If the instrument does not output power check to see that the IM317HVK U19 is tightly screwed onto its heat sink It is on stand offs near the fan in the left rear of the unit To test the output stage set up the controller so that there is power to the load This can be done by selecting a setpoint temperature above the control sensor temper ature and entering a gain value COPYRIGHT 1 88 LSCI Model 805 Next measure the gain signal to be sure it is operating correctly The gain signal can be measured from TP1 to TP3 on
77. erform the functions of TALKER or LISTENER The EOI End or Identify management line is pulled low by the BUS CONTROLLER or a TALKER the Model 805 to indicate the end of a multiple byte transfer sequence Also the EOI line along with the ATN line are pulled low by the BUS CONTROLLER to execute a polling sequence The SRQ Service Request management line is pulled low by a device to signal the BUS CONTROLLER that a process is completed a limit overload or error encountered In some cases this means that service is required Transfer of the information on the data lines is accomplished through the use of the three signal lines DAV Data Valid NRFD Not Ready for Data and NDAC Not Data Accepted Signals on these linesoperate in an interlocking hand shake mode The 4 2 Mnemonic Interface Function Name Model 805 two signal lines NRFD and NDAC are each connected in a logical AND to all devices connected to the bus The DAV line is pulled low by the TALKER after it places its data on the DATA lines This tells the LISTENERS that information on the DATA lines is valid A LISTENER holds the NRFD line low to indicate it is not ready Since these lines are connected in a logical AND to all other devices then the NRFD line will not go high until all of the devices are ready The NDAC line is pulled low by a LISTENER while it is receiving the DATA and lets it go high when the DATA is captured Since the NDAC
78. es with voltages between 0 and 6 5535 volts or positive temperature coefficient sensors such as platinum or rhodium iron A calibrated sensor and 8001 Precision Option is required for the Model 805 to read accurately in temperature for the TG 120 diode sensors This configuration will also read DT 470 and DT 500 series sensors but with reduced resolution and accuracy See Table 6V 1 The 805 P2 converts either Input A or B or both with two modules to accommodate 100 ohm platinum RTD s which conform to DIN 43760 within tolerances of 0 1K have an interchangeability of 0 1 at OC and a temperature coefficient of 0 00385 9C from 0 to 1006 The 805 P3 accommodates 1000 ohm platinum RTDs and the 805 R1 supports 27 ohm Rhodium Iron RF 800 4 sensors MOD 3 SPECIFICATIONS Specifications for the 805 6 P2 P3 and R1 input modules are given in Table MOD 1 COPYRIGHT 12 87 LSCI Table MOD 1 Module Specifications Sensor ordered separately 805 6 6 Volt Diode Sensor DI 470 series DT 500 series and TG 120 series from LSCI as well as any other diode sensor Current Excitation 10uA 0 005 Voltage Range 0 to 6 5535V Resolution 0 1 millivolts Accuracy 0 2 millivolts Display Resolution 4 digits Displays 0 000 to 6 553 volts 805 P2 100 ohm platinum PT 100 series or any other 100 ohm platinum sensor Current Excitation 1mA 0 005 Resistance Range 0 0 to 299 90 Resolution 0 01 ohms Accuracy 0 01
79. ex mode it can transmit and receive information in one direction at a time data transmission 15 asynchronous each character is bracketed by start and stop bits that separate and synchronize the transmission and receipt of data The baud rate is switch selectable at 300 or 1200 baud The interface maintains EIA voltage levels for data transmission 6 5 2 face Model 8054 IEEE 488 Inter The IEEE 488 interface and its com mands are described in Section IV of this manual 6 5 3 Option The 8055 Analog Output is designed to be installed in a Model 805 and provide an analog voltage output of display sensor temperature in kel vin for the purpose of recording either with a strip chart recorder or other similar device The out put resolution is O0 1mV out of 1 volt Model 8055 Analog Output COPYRIGHT 10 87 Model 805 805 6 6 VOLT DIODE 805 Input Modules 805 P2 100 OHM PLATINUM 805 P3 1000 OHM PLATINUM AND 805 R1 27 OHM RHODIUM IRON CONVERSION INPUT MODULES MOD 1 INTRODUCTION This section contains information pertaining to the 805 6 805 2 805 P3 and 805 R1 conversion input modules Included are descriptions specifications installation operation and maintenance information MOD 2 DESCRIPTION The 805 6 805 P2 805 P3 and 805 R1 are designed to be installed in a Model 805 to convert either the Input A or Input B or both with two options to accommodate diode sensors TG 120 seri
80. f the interface XR amp I function was performed the unit displays the error stores it in the WS data location and waits for the NOVRAM initialization sequence to be performed Repeated ErrO2 conditions could signal a failure by the NOVRAM to retain data and it should be replaced The REMOTE SENSOR ID for the unit allows for an input range of 00 00000 on bits B4 thru BO of the ID to 1F 11111 on bits B4 thru BO The 1F input is reversed for a REMOTE SENSOR ID error condition the Position Data Adaptor uses this code to indicate that more than one Sensor Scanner is active to the unit When the error stores it in the WS data location and continues to monitor the REMOTE SENSOR ID until the fault is corrected 8053 RS 232C Interface Parity Error The error may be caused by problems with the signal lines or incorrectly specified parity The error and any of the other 805 RS errors is transmitted when the unit is asked to output and is cleared following the first transmission after tbe error Error Code Possible Cause Corrective Action 8053 RS 232C Interface Overrun Error The error is caused by the unit s main processor not reading the input character before the next one becomes available The overrun character s are lost 8053 RS 232C Interface Framing Error The error may be caused by signal line transients or incorrectly specified stop bits or character length 8053 RS 232C Interface Input Buffer Overrun Error The erro
81. following procedure The following equipment 15 used to calibrate the 8055 Analog Output 1 Digital Voltmeter Multimeter DVM 4 digit resolution or better 2 Precision Standard Resistor to simulate the input sensor or a Precision Voltage Source with an output resolution of 100 uV out of 3 V or better The unit should be allowed one hour to warm up to achieve rated specifications Use the following procedure to calibrate the 8055 Analog Output 8055 2 Model 805 1 Remove the two top panel screws and slide the panel off 2 Connect the DVM plus lead to the J1 SENSORS MONITORS connector pin 18 and the minus lead to pin 19 3 With the load resistors or the voltage standard to simulate the input sensor go to a low temperature and adjust the trimpot labeled Z for Zero on the calibration cover until the voltmeter reading corresponds to 10 mV K Go to a high temperature and adjust the trimpot labeled S for Span 4 Repeat procedure in 3 until there is no further Zero or Span adjustment required 5 Install the top panel 8055 7 REPLACEABLE PARTS Included in this Section are the Model 8055 Analog Output schematic replaceable parts list and illustrated component layout Refer to the manual for ordering infommaticn COPYRIGHT 12 87 LSCI REPLACEABLE PARTS LIST 8055 ANALOG OUTPUT OPTION ITEM LSCI Part NO Number Qty Description MFR PART NO U1 104 529 IC
82. full scale input of 3 000 volts 6 553 volts for the 6 module If an input exceeding 3 000V or 6 553V for the 6 module is ap plied to the displayed input an overload condition is present and is indicated by an OL on the dis play 3 7 3 2 Resistance Units The Resistance mode requires the 805 P2 P3 or 1 input conver sion module s The display ranges and resolutions for the 805 P2 P3 and R1 are 0 0 to 299 9 ohms to 2999 and 0 00 to 99 99 ohms respectively If a resistance exceeding full scale is applied to the input OL is indi cated on the display 3 7 3 3 Temperature Units In kelvin temperature units the chosen input is displayed with a display resolution of 0 1 degree above 100 kelvin and 0 01 degree between 1 and 100 kelvin Note that this is display resolution and not system resolution or accuracy of the reading If the sensitivity of the sensor is too low to support this resolution i e one bit COPYRIGHT 10 87 Model 805 Section III 10 11 Figure 3 1 Model 805 Temperature Controller Front Panel Units selector button with annunciators in kelvin celsius fahren heit or sensor units volts or resistance Annunciated SENSOR Selector buttons A or B for display sensor Display sensor reading in units selected see Key 1 with filter indication HEATER POWER full scale selector buttons with annunciators LO 1072 MED 1071 100 1 times 25 watts Per cent
83. ge heater HTR 50 50 ohm cartridge heater OUTPUT POWER OPTION W60 60 watt output stage for 25 ohm heater INTERFACE OPTIONS 8053 RS 232C Interface 8054 IEEE 488 Interface 8055 Analog Output Option COPYRIGHT 10 87 ACCESSORY Section VI VI INFORMATION 6 2 INPUT CONVERSION MODULES The Input Conversion Modules are described in Section I Table 1 1 of this Manual 6 3 ACCESSORIES 6 3 1 Model 805 Connector Kit The connector kit for the Model 805 consists of one 24 pin D style plug mate to the J1 SENSORS MONI TORS connector LSCI Stock 106 250 6 3 2 RM 3H1 3H2 Rack Mount Kits The Model 805 can be rack mounted in a standard 19 inch instrument rack using either the RM 3H1 or RM 3H2 Rack Mounting Kits The RM 3H1 kit mounts one Style L half rack unit in a height of 3 5 inches The RM 3H2 mounts two half rack units in the same space side by side Refer to Figure 2 1 for a RM 3H1 installation with handles 8072 6 3 3 IEEE 488 Interface Cable The 8072 IEEE 488 interface cable is one meter long and is equipped with double ended connectors so it may be inter connected in serial or star patterns common in IEEE in strument configurations 6 3 4 8271 11 Sensor Heater Cable The 8271 11 Sensor Heater Cable is 10 feet 23 meters long with a 24 pin D style locking receptacle with hood and a dual banana plug for power output Included are four lead connections for two sensors as well as the power outp
84. gher the voltage the lower the tempera ture For Platinum sensors the resistance increases as the temper ature increases COPYRIGHT 1 88 LSCI Section V 5 5 5 2 Test Setup Test the heat er by placing an appropriate test resistor see Table 1 in to the sensor input and place a 10 ohm at least 10 watts up to 25 ohm at least 25 watts resistor across the heater terminals 5 5 5 3 The Heater Display The heater display is shipped from the factory reading the percent of power out If the heater is 10 ohms then at 100 percent the heater will have 1 amp through it and 10 volts across it If the heater is reading 50 then the instrument is delivering 5 watts 0 707 amps and 7 07 volts to the 10 ohm load If the unit is reading in current a reading of 50 will mean 2 5 watts 0 5 amps and 5 volts The heater display can be changed from power to current by switching internal dip switch 54 1 5 5 6 Checking Gain and Reset 5 5 6 1 Gain With a heater load connected to the heater terminals and a test resistor connected to the control sensor input enter a setpoint above the control sensor reading Next enter a gain value The heater display should now indi cate that power is being delivered to the heater The amount of power is a scaled factor of the error signal times the gain Sensor voltage Setpoint voltage Gain If the setpoint temperature is increased or the gain is in creased the output power will in c
85. he Max scale the unit will output 40 volts at 0 4 amps or 16 watts lower ranges are scaled as explained in 5 6 4 1 above except the voltage limit is 40 volts NOTE The values given above are nominal values If they are slightly off it should not effect operation since the heater circuit is part of a feedback loop 5 6 CALIBRATION The adjustments test points referred to in this section are la beled on the instrument calibration cover Remove the two top panel screws and slide the top cover off to gain access to the adjustments 5 4 Model 805 and test points Note The unit should be allowed a one hour warm up time to achieve rated specifications This cali bration procedure is for an 805 in the standard diode configuration for both the A and B inputs Fora configuration other than a standard configuration refer to Section VI for the specific Input Conversion Module present in the unit 5 6 1 Sensor Input Module Calibration For other than the standard diode input calibrate each input module as specified in Section VI for that module This includes current and Input Amplifier for resistors 5 6 2 Current Source Calibration Connect the voltage leads of the DVM across the 100K test resistor for Input A and adjust the A I trimpot until the voltage across the resistor is exactly 1 0000 volt Repeat this procedure for Input B 5 6 3 A D Converter Calibration Select the 00 curve for the SENSOR A
86. he control parame ters 3 9 LOCAL REMOTE SELECTION If either the IEEE 488 option or the RS 232C option is present in the 805 pressing the SETPOINT BUTTON for greater than 1 second toggles the 805 between REMOTE and LOCAL operation LOCAL indicates front panel con trol When returned to IOCAL the display shows the curve number for the display SENSOR indicated When placed in REMOTE the control ler is under remote control and the front panel controls are disabled The display shows the IEEE 488 Section III Figure 3 3 10 100 1 1000 3 3a Nominal Gain Settings address when placed in remote if the key is held down for over one second Refer to Section 4 for Remote Operation of the 805 REAR PANEL DESCRIPTION 3 10 CONTROL Switch The CONTROL switch selects either the INPUT A or INPUT B signal to be fed to the control section of the 805 Since this selection is hard wired through the switch this choice can not be changed over either of the optional computer interfaces 3 11 HEATER Power Output Terminals The heater power output is rated at one ampere dc with a 25 volt com pliance The grey HI terminal is the high side and the black LO terminal is the low side The black GND terminal is case ground and if connected should be tied to the LO terminal It will nor mally not be used 3 12 SENSORS MONITORS The connections for the J1 SENSORS MONITORS connector is given in Table 2 2 3 13 SENSOR
87. ice brochure for additional discussion of calibration accuracy The 805 display uses digital filtering which averages up to ten temperature readings This reading mode eliminates noise within the cryogenic system analogous to averaging with a digital voltmeter This algorithm can be deselected bypassed by switch 2 of the SENSOR ID dip switch on the back panel for a given input if the user prefers not to average readings A decimal point at the upper left of the display indicates that averag ing is on The Model 805 can also be used with the optional input conversion modules 6 which allow either input to be converted to handle either the TG 120 series diodes or any diode with a 0 to 6 volt output or positive temperature coefficient metallic resistors i e platinum P2 or P3 or rhodium iron R1 resistors The DIN curve is standard within the instrument and is called up automatically unless a precision option is present for the platinum resistor The accuracy of the reading is dictated by the sensor and its conformity to the DIN curve The tolerance on these devices is given on the technical data sheet for the Lake Shore PT 100 series sensors The combined accuracy of the instrument and a calibrated resistor with a preci sion option is on the order of 40mK over the useful range of the sensor above 40K for the platinum Note that a precision option is required for a rhodium iron or a TG 120 to read correct
88. ings where 0 is OPEN and 1 is CLOSED 8053 4 SPECIFICATIONS Specifications for the Model 8053 RS 232C Interface are given in Table 8053 4 8053 5 INSTALLATION The 8053 RS 232C Interface is factory installed if ordered with a Model 805 Temperature Controller or can be field installed at a later date If field installation is required use the following procedure 1 Configure the 8053 baud rate and word structure switches as outlined in Section 8053 3 COPYRIGHT 12 87 Model 805 Table 8223 3 Switch S1 123456 Word Structure Word Structure Choices Stop Bits Invalid 1 Bit 1 not supported 2 Bits Parity Genertn Chck Even Parity Enable Enable Disable Character Length Bits 5 not supported 6 not supported 7 Supported 8 not supported not interface respond but the card has not been tested with these settings at the Note settings For the the supported will factory X is a don t care setting for that switch WARNING To prevent shock hazard turn off the instrument disconnect it from AC line power and all test equipment before removing cover 2 Set the POWER switch to OFF and disconnect the power cord from the unit Remove the two top panel screws and slide the panel off Note on the calibration cover the position of the Interface Option where the 8053 will be 3 Remove the three screws that secure the calibration cover
89. ith a Model 805 Temperature Controller or can be field installed at a later date If field installation is required use the following procedure WARNING To prevent shock hazard turn off the instrument disconnect it from AC line power and all test equipment before removing cover 1 Set the POWER switch to OFF and disconnect the power cord from the unit Remove the two top panel screws and slide the panel off Note on the calibration cover the position of the Interface Option where the 8054 will be 2 Remove the three screws that secure the calibration cover to its clips and remove the cover Remove the two back panel mounting screws that secure the J2 blank cover plate to the interface opening and remove the plate COPYRIGHT 12 87 ISCI 3 Turn off DIP Switch 3 of switch package S4 the 805 main board 4 Plug the internal interface cable attached to the 8054 into option connector JC on the 805 main board with the locking tab configured properly 5 Position the 8054 interface 24 pin IEEE 488 connector in the J2 opening on the 805 back panel and secure it in place with the screws removed earlier note the transformer wires that run along the rear edge of the transformer may have to be adjusted to install the 8054 6 Install the calibration cover by reversing procedure 2 7 Install the top panel 8 Configure the address switches as shown in Section 4 4 8054 3 REPLACEABLE PARTS Includ
90. kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk Output of Instrument Data Set Point Data N11N12N13 N14N15 8 Characters plus up to 2 terminators where the N11 N15 variations the same as for see Table 4 15 4 9 7 The W3 Data String The settings for the gain reset heater range as well as the instan taneous of Heater Power can be transmitted from the Model 805 with the W3 command The command SPIR or any combina tion without a value following the letter sets the chosen parameters to 0 e g SP sets the set point and gain to 0 COPYRIGHT 4 88 LSCI 4 10 COMMAND OPERATIONS The following example in HP Basic sets the set point to 123 4 K the gain to 45 the reset integral to 30 the heater range to 10 1 and the output statement to be Wl OUTPUT 712 S123 4P45I30RAW L pata 2 805 preset address 7 IEEE card address Output Data Command 1 Section IV Model 805 Table 4 9 Model 805 Command Request Summary for the Control Parameters Functional Description Setting of all other Control Parameters Proportional or PN 182 Integral RESET 2 is 0 1 through 99 Examples the command are P PO 0 0 and P99 N4N5 is 0 0 OFF through 99 three characters including the decimal point Forms of the command are IO 10 0 through 199 Heater Range command are RO through R5 Ny Range OFF OFF OFF 2 1 MAX
91. l operation of the 805 and can be used as a periodic maintenance check The following equipment is used in the test 1 Digital Voltmeter DVM 4 digit resolution or better 2 Verification Connector fabri cated per Section 5 5 1 Complete the following set up pro cedure for this test 1 Connect the DVM across the test resistor of Input A 2 Connect the 805 to line power and turn the unit ON Verify that the 805 initializes to the proper POWER ON state as defined 5 2 Model 805 in Section 3 6 1 The following procedure is used to test the overall 805 operation Note The unit should be allowed a one hour warm up time to achieve rated specifications 5 5 3 Current Source Check The DVM across the test resistor should read as follows Refer to Table 5 1 for resistance values 805 1 0000V 100 805 6 1 0000V 100 805 P2 0 10000V 104V 805 P3 0 10000V 104V 805 R1 0 03000V 104V 5 5 4 Temperature Display 5 5 4 1 Determine Input Type The first step to check the instru ment s display and operation is to determine the type of sensor input a The type of input module s in stalled in the Model 805 is located on the front page of every 805 manual b The 805 displays the type of input module s installed in the A and B inputs sequentially when the instrument is powered on Possibilities are d3 d6 P2 P3 or rl c The type of input can also be displayed by holding down the
92. ler kelvin Refer to Table 3 2 for other diode temperature limita tions Display Resolution 1nV or up to four digits and resolution of 0 01 units in temperature Diode Response Curve s The silicon diode series DT 470 Curve 10 as well as the series DT 500 DRC D and DRC E curves are present in the 805 Curves to match other existing Sensors are available on request 1 3 Section I Diode Sensor Power Dissipation Dissipation is the product of Sensor Excitation Current 10uA and Resultant Sensor Voltage Accuracy Unit reads sensor voltage to an accuracy of better than 0 1mV Equivalent temperature accuracy is a function of Sensor type temperature sensitivity and calibration of Sensor See the Technical Data Sheet for the DT 470 Series Temperature Sensors and the Model 8001 Precision Option for accuracy with LSCI calibrated Sensors 6 VOLT DIODE SENSOR MODULE 805 6 Diode Sensor Input Module Similar to standard configuration but has O to 6 volt input to accommodate TG 120 Series Sensors Converts either Input A or Input B or both with two modules to accommodate the 6 volt modification for TG 120 series sensors Requires calibrated sensor and 8001 Precision Option for 805 to read correctly in temperature This module may be field installed 100 OHM PLATINUM MODULE 805 P2 100 Ohm Platinum Sensor Module Converts either Input A or B or both with two modules to accommodate 100 ohm Platinum RTD Sensor
93. lines of all devices are connected in a logical AND the NDAC line will not go high until all devices have received the DATA 4 3 INTERFACE CAPABILITIES The IEEE 488 Interface capabilities of the Model 805 are listed in Table 4 1 as well as in mnemonic format on the instrument s rear panel Table 4 1 Interface Functions Source Handshake Capability Acceptor Handshake Capability Basic TALKER no serial poll capability Talk only Unad dressed to Talk if addressed to Listen Basic LISTENER Unaddressed to Listen if addressed to Talk No Service Request capability Complete Remote Local capablty No Parallel Poll capability Full Device Clear capability No Device Trigger capability No System Controller capablty Open Collector Electronics COPYRIGHT 4 88 LSCI Model 805 4 4 Model 805 488 ADDRESS SWITCH The IEEE 488 Address Switch is located on the instrument s rear panel see Figure 3 2 Key No 7 Refer to Figure 4 1 for the following discussion 4 4 1 Terminating Characters delimiters Switch 1 is used to define the instrument s terminating characters delimiters The OPEN 0 position selects the ASCII characters CR and LF Carriage Return and Line Feed as the terminating characters for input and output data For the output data from the Model 805 back to the computer over the Bus the EOI line is set by the Model 805 with the output of the Line Feed LF This setting 0 for switch
94. lot 2 4 8 SELECTION OF SET POINT UNITS INPUT UNITS DISPLAY SENSOR AND RESOLUTION Table 4 7 4 8 1 Units for Set Point The FOC Command The FOC command sets the tempera ture or sensor units for the set point Note that only one choice of sensor units volts or ohms is available and that it is selected automatically based on the control input module present Consequent ly the command for selecting sensor units for control is FOS Temperature units are selected with the same command with K C or F substituted for S The display units are the same as the set point units and the same for each input 4 8 2 Display Sensor Selection The 1 and F1B Commands This command selects the sensor input to be displayed independent of the input selected for control 4 10 Model 805 4 8 3 The A and B SENSOR ID Infor mation The and BC1C2 Commands The information for these commands is sent to the Model 805 to set the functional parameters as described in Table 4 7 Table 4 7 defines the AC4C and BC4C9 definitions as independent functions If multiple functions are to be selected the character equivalents are additive see examples below which are given as SENSOR A ID s they pertain to SENSOR B ID s as well A20 Disable digital filtering and select Sensor Curve 02 to be used to determine temperature A22 Enable digital filtering and select Sensor Curve 02 to be used to determine temperature
95. ly in temperature These input conversion modules are easily installed by the user thus 1 2 Model 805 units can be modified to satisfy changing requirements The ample memory space provided in the 805 allows several response curves to be stored in one instru ment Depending on the complexity of the curves up to ten can be programmed into the unit by Lake Shore The SENSOR ID switches are used to select which particular sensor response curve is to be used with each input Thus the user is able to make sensor changes at will even when different response curves are required The data for calibrated sensors can be stored within the instrument by means of the 8001 Precision Option Each curve can contain up to 99 sensor unit temperature data points With the standard preci sion option format which consists of 31 data points and a 20 charac ter information line up to ten curves can be stored in the unit See Section 3 3 for more descrip tion Although voltage resistance temperature data points are stored as a table interpolation within the instrument results in the equivalent of a high order polyno mial calculation in the converting of the input voltage or resis tance to temperature This is done by means of a proprietary algorithm developed at Lake Shore Cryotronics Inc The control temperature set point selection is made via thumbwheel switches on the front panel of the instrument The set point swit
96. mperature Controller Included is a description specifications installation operation and main tenance information 8055 2 DESCRIPTION The 8055 Analog Output is designed to be installed in a Model 805 and provide an analog output proportional to the Kelvin temperature of the display sensor for the purpose of recording either with a strip chart recorder or other similar device the sensor temperature The analog output is present on the J1 SENSORS MONITORS connector on the 805 back panel with pin 18 being the V output and pin 19 being the V output 8055 3 SPECIFICATIONS Specifications for the Model 8055 Analog Output are given in Table 8055 1 8055 4 INSTALLATION The 8055 can be installed in the Model 805 Option Slot 1 The 8055 Analog Output is factory installed if ordered with a Model 805 or can be field installed at a later date If field installation is required use the following procedure WARNING To prevent shock hazard turn off the instrument and disconnect it from AC line power and all test equipment before removing cover COPYRIGHT 12 87 LSCI Model 8055 Analog Output ANALOG OUTPUT Table 8055 1 Model 8055 Analog Output Specifications Output Range 0 000 to 10 000 V Output Resolution lmV out of 10V Output Resistance Less than 100 Output Equivalence Temperature for all Input Modules Output 0 000 to 9 999 V for display of O to 999 9 K Sensitivity 10 mV K Voltage
97. n circuit or a fault on the Input Card When the error occurs the unit displays the error if it is the DISPLAY SENSOR input and continues operation until the fault is corrected The error is stored in the WI A Input data location and is displayed when the LOCAL key is pressed to determine the Input Card type Incorrect B Input Card polarity Operation is the same as for Err27 except the error is stored in the WI B Input data location COPYRIGHT 5 88 3 This Page Intentionally Left Blank Cry Temperature Range 1 4 to 800K 272 to 527 C Two Sensor Inputs Uses Diodes Platinum and Rhodium Iron RTDs or a combination of these Digital Display in Ohms or Volts Real Time Analog Control Control Stability to Better than 0 01K IEEE 488 and RS 232C Interface Capability The Model 805 Temperature Controller is an affordable versatile instrument designed to manage a broad array of controlled temperature requirements in the science field low temperature physics to as low as 1 4K in low to moderate magnetic field environments and in medium temperature applications to 800K 527 C Five sensor input types from which to choose In its standard configuration the 805 controller is provided with two inputs that accommodate Lake Shore s interchangeable 3 Volt silicon diode sensors Optional sensor inputs accommodate Lake Shore s gallium aluminum arsenide 6 Volt diodes and 100 1000
98. n for the module is entered the set point is set to the upper temperature limit Also note that an S sent by itself to the 805 sets the set point to 0 kelvin or its equivalent in the units chosen which will result in shutting down the heater output stage of the temperature controller Note Although limitations on the range of the set point are set within the software when in temper ature units these limits are not possible for sensor units due to the different characteristics for each sensor 4 9 2 The WP Request Data String This request is a subset of the WO command the WP command giving the set point value by itself Model 805 4 9 3 Setting the GAIN Proportional The Command The gain is a multiplier between 0 1 and 99 a range of 990 i e 99 0 1 990 A gain of 0 0 is not allowed The format is free field with examples of the command being P 1 PO 1 P9 P9 P9 0 P99 P99 etc The string P987 12 will be inter preted as P87 i e the first valid combination tied to the decimal point or end of string will be retained A P transmitted by itself is equivalent to PO or P0 0 and sets the gain to 0 1 When returning to LOCAL the gain setting if changed over the IEEE 488 Bus is no longer valid since the 805 will now read the front panel gain potentiometer setting 4 9 4 Setting the RESET Integral The I Command The reset is set from 0 1 through 99 1 to 990 seconds Like the gain c
99. nd CONT D N 0 0000000 I l I C0 N P P I l q OP ab PSS WO S TABLE OF CONTENTS CONT 7 4 Clear s E ED Eur 7 5 The W2 Data String deine e bap CRUS M el TE epis cet eius 7 6 The WI Data String pr 4 8 SELECTION OF SET POINT UNITS AND DISPIAY SENSOR Table 4 7 8 1 Units for Set Point The Command 8 2 Display Sensor Selection The F1A and F1B Commands 8 3 The and B SENSOR ID Information The ACC and BC4C9 Commands 4 8 4 The Sensor ID on Return to Local Scie er She Sen er Mae eS 4 8 5 The Wi Data String e e e s s lt e o 4 9 THE CONTROL COMMANDS D The Set Point Value The S Command S Io uices ur ug The WP Request Data String e o Setting the GAIN The P Command e Setting the RESET Integral The I Command Heater Range The R Command e lt Note The Return to Local s e e e s o The WS Data String a e e s s 4 10 COMMAND OPERATIONS pu PTT 4 10 1 Output Data Statemants e WI Dec eS es 4 10 2 The WO Data String s lt o e oo 4 11 SAMPLE PROGRAMMING s elc des Wy eid XS 4 11 1 HP86B
100. nd indicators 3 2 INSTRUMENT CONFIGURATION 3 2 1 Input Modules The Model 805 can be used with several different input modules These modules are summarized in Section I Input modules can be mixed allowing two different sen sor types to be used with the 805 e g both a diode and a resistance thermometer could be used on the two inputs with the addition of one optional input module 3 3 PRECISION OPTIONS There are two types of Precision Options available for the 805 The 8001 Precision Option is supplied for calibrated sensor s precision option data ordered at the same time as the 805 The 8002 Precision Option is used when the customer already owns an 805 and wants new sensor calibra tion data stored in the instrument LSCI stores the calibration data in an IC chip and sends the programmed chip to the customer The IC is then installed in the 805 by the customer Note When ordering the 8002 Precision Option specify the serial number of the 805 Note that additional calibrations can be added to the instrument at a later time by specifying with the sensor calibration at time of order the serial number of the COPYRIGHT 10 87 INSTRUCTIONS instrument the sensor will be used with If a Precision Option is ordered from the factory its curve number will be specified for the user and included in the manual as an adden da to the manual see Section 3 13 2 and Table 3 3 Note proprietary algorithm is
101. ndard Digital Interface for Programmable Instrumentation All instruments on the interface bus must be able to perform one or more of the interface functions of TALKER LISTENER or BUS CONTROLLER A TALKER transmits data onto the bus to other devices A LISTENER receives data from other devices through the bus The BUS CONTROLLER designates to the devices on the bus which function to perform The Model 805 performs the functions of TALKER and LISTENER but cannot be a BUS CONTROLLER The BUS CONTROLLER is your Digital Computer which tells the Model 805 which functions to perform COPYRIGHT 4 88 LSCI Section IV Iv OPERATION The interface works on a party line basis with all devices on the bus connected in parallel 11 the active circuitry of the bus is contained within the individual devices with the cable connecting all the devices in parallel to allow the transfer of data between all devices on the bus The following discussion of the signal lines on the bus are for general information Your digital computer handles these lines through its circuitry and software The user need never concern himself with these lines or signals however knowledge of their purpose will help one to understand the operation of the Interface There are 16 signal lines contained on the bus 1 8 Data Lines 2 3 Transfer Control Lines 3 5 General Interface Management Lines The data lines consist of 8 signal lines that carry
102. nterface When switch 1 is CLOSED 1 the terminator status is defined as T1 LF CR and the status can be changed using the TO T1 T2 or T3 commands 4 7 4 Clear The C lear Message see Table 4 6 sets the Model 805 to the turn on state This action is similar to turning the instrument OFF and then back ON except that it occurs in milliseconds rather than seconds and the Model 805 does not go through the power up display sequence Model 805 Summary of Output Requests oe mmm O Input and Option Card Data S w semana CS COPYRIGHT 4 88 LSCI Model 805 Section IV Table 4 6 Model 805 Interface Setup Commands and Request Status Command Functional Description Selects IEEE EOI status Forms of the command are ZO and 71 When is Status is 0 EOI line is set accepted on last character input or output EOI line is not set on last character output or acknowledged on input Selects Remote Interface mode Forms of the command are MO 1 and 2 When is Mode is 0 Local 1 Remote 2 Remote with Local Lockout Changes terminating characters when IEEE Address Switch 1 is CLOSED 1 Forms of the command are T1 2 and T3 When 15 Terminators are gt 0 CR END LF also with Switch OPEN 1 LF END CR default unless changed 2 END LF 3 END DAB Clear command returns unit to power up state Restart Kk
103. o its clips and remove the cover 3 The conversion module has 7 pins along one bottom edge and 8 pins along the opposite bottom edge The 805 main board has an 8 pin keyed socket strip to the right and a 7 pin socket strip to the left of the unit as viewed from the front Plug the conversion module into the Input A or Input B socket strips Secure the module by threading the screw provided through the module cover and into the threaded standoff below the module and tighten the screw 4 Install the calibration cover by reversing procedure 2 5 Install the top panel MOD 2 Model 805 MOD 5 OPERATION The 805 6 Input Conversion Module provides the 10 microampere excitation current to the sensor The resulting sensor voltage is routed into the module multiplied by 0 457771 3 0000 6 5535 The sensor voltage is transferred to the J1 SENSORS MONITORS connector for external monitoring The 805 P2 Input Conversion Module provides the 1 milliampere excitation current to the platinum sensor the 805 P3 supplies 0 1 milliampere and the 805 R1 supplies 3 milliamperes The resulting sensor voltage is routed into the module and amplified by a factor of 10 negative 10 amplified 7 10 sensor voltage is transferred to the J1 SENSORS MONITORS connector for external monitoring MOD 6 CALIBRATION The Input Module was calibrated to specification prior to shipment If recalibration is needed refer to the f
104. o pin 8 then 012 should be replaced IOST 88 1 8 S uoTjdo 1008 eu pue S1osues YIM pesn eq qsnu spied qndur 5551 eanjeidoduoj r pear 030N 10 0 0 T0 0 U6 6662 0 T ELZ 09L v UOOOT UOOOT M008 O3 vl 0 10 0 ES U66 662 0 l tLZ 09 t UO OOIl UOOT M008 O3 vl eee Y Y HF F rPAaR D pE F nOJO y h qou 995 T0 O ASESS 9 0 535 ou A000 T UXOOT AUC 0 MSCE v l _ _ _ T0 O A000 T Ux00T AUT O AUSO 0 rr ees 0666 66 0 1008 FT vOJOT ANO AYO TO 46666 2 0 00 MSLY O M sarun sarun PIS U3TA iosUu S ur pue paepuejs 1osu s 205095 zosu s 5 lt rqer 508 T PON A UOT Deg Model 805 Section V 5 8 MODEL 805 REPLACEABLE PARTS This section contains component layout diagrams schematics and replace able parts lists for the Model 805 and are arranged in
105. o optimize the fit of the stored data with the sensor s actual calibration data points producing an agreement that is typically 0 025K or better Up to ten sensor curves may be stored in the controller through use of the 8001 option IEEE 488 and RS 232C Interface Capability Use of either the IEEE 488 or RS 232C interface option permits remote control with corresponding output data of all front pane functions including temperature control setpoint desired temperature display units gain reset and heater power level selection Temperature Controller Inputs Two Sensor Inputs A and B Control sensor A or B selected via rear panel switch Display sensor A or B can be selected frorn front panel independent of control sensor selection One sensor input conversion module required per input Sensor Input vs Temperature Range See table below for corresponding listing of sensor type and applicable temperature range Sensor Response Curve Standard curves provided with instrument Lake Shore diode curves 10 DRC D and DRC E1 platinum RTD DIN 43760 also see 8001 Precision Option Sensors ordered separately See table below Sensor Response Selection Rear panel DIP switch permits selection of appropriate sensor response curve for each sensor input Displays Display Resolution kelvin to 0 1K gt 100K to 0 01K lt 100K C or F to 0 1 degrees diodes to
106. ohm platinum or 27 ohm rhodium iron RTDs Different type sensors may be used in combination with one another Either sensor input may be designated for control Display of temperature can be independently switched between either input on the front panel Digital display function Temperature readout may be selected in or F with display in up to four digits and resolution to 0 01 units Diode voltage can be displayed to one millivolt and RTD resistance to 0 1 ohm Continous indication of setpoint temperature is provided via digital thumbwheel switches accessed from the front panel 805 CONT ROLLER Model 805 A Versatile Wide Range Temperature Controller Three level heater output selection From the HI mode set ting which provides up to 25 watts of D C current controlled power to the heater heater output can be attenuated in two further steps of a decade each to more closely parallel cooling capacity thus optimizing temperature control performance Optional output power of 60 watts is available The 805 con troller provides two digit LED display of heater power output as a percentage of total available power The 8001 Precision Option provides the means for storing data for calibrated sensors within the 805 controller The 8001 Precision Option consists of Lake Shore formatted sensor curve calibration data that is stored in the memory of the 805 con troller Lake Shore uses a proprietary algorithm t
107. ohms Display Resolution 4 digits Displays 0 0 to 299 9 ohms 805 P3 1000 ohm platinum Current Excitation 0 1mA 0 005 Resistance Range 0 to 2999 ohms Resolution 0 1 ohm Accuracy 0 1 ohm Display Resolution 4 digits Displays 0 to 2999 ohms 805 R1 27 ohm platinum 27 ohm rhodium iron sensor See Lake Shore Sensor brochures Current Excitation 3 mA 0 005 Resistance Range 0 00 to 99 990 Resolution 0 003 ohm Accuracy 0 01 ohm Display Resolution 4 digits Displays 0 00 to 99 99 ohms RTD Sensor Power Dissipation Depends on Sensor Resistance Dissipation is the product of sensor excitation current squared and the Sensor resistance MOD 1 805 Input Modules MOD 4 INSTALLATION An Input Conversion Module can be installed in the 805 as either Input A or Input B or both with two modules The module is factory installed if ordered with an 805 Temperature Controller or can be field installed at a later date If field installation is required use the following procedure WARNING To prevent shock hazard turn off the instrument and disconnect it from AC line power and all test equipment before removing cover 1 Set the POWER switch to OFF and disconnect the power cord from the unit Remove the two top panel screws and slide the panel off Note on the calibration cover the position of the Input A or Input B conversion module 2 Remove the three screws that secure the calibration cover t
108. oise with in the cryogenic system analogous to averaging within a digital volt meter This function can be se lected or deselected by switch 2 of the SENSOR ID on the back panel for each input separately The 805 is shipped from the factory with the filtering function selected The decimal point on the sign digit at the far left of the display win dow flags Filter on and will indicate whether the averaging al gorithm is being used If the averaging algorithm is used displayed temperature is on the average of somewhere between 1 and ten readings depending on the temp erature variation If an abrupt change in temperature is observed averaging is disabled and the last calculated reading is displayed As the disturbance is reduced in value the averaging gradually 3 4 Model 805 increases until a total of ten readings are considered 3 8 CONTROL BLOCK 3 8 1 CONTROL SENSOR The choice of input for the CONTROL SENSOR is made by a switch labeled CONTROL on the rear panel This switch selects either INPUT A or INPUT B for control and lights the appropriate display light on tbe front panel 3 8 2 SET POINT Set point selection is made via thumbwheel switches on the front panel The set point switches which provide a continuous indica tion of the set point value when the unit is in LOCAL mode enable the user to quickly and easily determine whether the test system is at the control temperature The temperature
109. ollowing procedure The following equipment is used in the calibration 1 Digital Voltmeter Multimeter DVM 4 digit resolution or better 2 Precision Standard Resistor 100 kilohms for the 805 6 1 kilohms for 805 P3 100 ohms for 805 P2 805 R1 with a tolerance of 0 01 or better in all cases 3 Precision Voltage Source capable of supplying a voltage with an accuracy and resolution of 100 microvolts out of 10 volts for the 805 6 and 10 microvolts out of 1 volt or better for the other modules COPYRIGHT 12 87 LSCI Model 805 The unit should be allowed a one hour warm up time to achieve rated specifications Use the following procedure to calibrate the 805 6 P2 P3 and R1 Input Conversion Modules 1 2 4a 4b Remove the two top panel screws and slide the panel off Remove the three screws that secure the calibration cover to its clips and remove the cover Set 10 pA 100 pA 1mA 3mA Current Connect the appropriate precision resistor across the I and I pins of the connector for the input the module occupies Connect the DVM plus lead to the I pin and the minus lead to the I pin Adjust the trimpot marked M I on the module cover for the appropriate Input until the voltage across the resistor is equal to the sensor current times the resistance the tolerance of the resistor The 805 6 805 2 805 P3 and 805 R1 currents are 104A 31mA 1004A and 3mA respectively
110. ommand it is free field with the same characteristics and format It will also revert back to front panel settings under LOCAL control A setting of 0 0 turns the reset off 4 9 5 Heater Range The R Command The heater range can be changed over the bus with the RN command R1 or R6 and up are equivalent to the RO command see Table 4 10 4 9 6 NOTE The Return to Local Although the Set Point Gain Reset and Sensor ID s can be changed over the IEEE Bus with the 805 in REMOTE when the 805 returns to LOCAL these settings are read and updated from the hardware i e the front panel set point gain and reset and the SENSOR ID switches on the back panel COPYRIGHT 4 88 LSCI Model 805 Section IV Table 4 8 Model 805 Command Request Summary for Setpoint Setup Functional Description Set Point Input The decimal point is FREE FIELD and its allowable position depends on the control units Units K Limits are Range 0 through 999 9 through 0 000 through 0 through 999 9 999 9 9 999 9999 The Set Point is limited based on input module and Sensor Sensor Type DT 470 DT 500 oo TG 120 DT 470 PT 100 Series PT 1000 Series Rhodium iron Lower limit is 0 273 1 or 459 6 OF ver Set iid Limit Sensor Units 324 9 51 7 125 1 2 999 volt 6 554 volt 474 9 9 201 7 7 395 1 1 2 999 volt 799 9 526 7 980 1 kkkkkkkkkkkkkkkkkkkk
111. owing default values 1 Interface select code 10 2 Baud rate 300 Baud 3 Autohandshake Off 4 Character Length 7 bits 5 Parity Odd 6 Stop bits 1 7 Cable Option Standard 25 pin socket Since the HP default Baud rate character length parity and stop bit configuration are the same as those of the 8053 Interface when shipped none of the switches on the 8053 board need to be changed When connecting the HP 86B Serial Interface to the 8053 Interface a transition cable needs to be made to connect the socket connector of the HP to the socket connector of the 8053 Interface Figure 8053 2 shows the adapter cable that must be made The arrows indicate the source and direction of signal flow Figure 8053 2 Handshake Connection to HP 86B Half Duplex W O Protective Ground Transmitted Data Received Data Signal Ground Protective Ground Transmitted Data Received Data Signal Ground 8053 5 Model 8053 RS 232C Interface The following program will input a command from the keyboard and output it to the 8053 The program will then input the specified 8053 s response display it and return for another command 10 REM HALF DUPLEX W O HANDSHAKE 15 REM I O TEST RS232 TEST1 20 DIM A 256 B 3000 25 REM A IS OUTPUT B IS INPUT 30 INPUT A MAKE SURE TO GIVE AN 35 OUTPUT STATEMENT COMMAND 40 OUTPUT 10 A OUTPUT COMMAND 50 ENTER 10 B INPUT THE DATA 55 FROM THE CONTROL
112. ptional computer interface and provide ap proximate decade step reductions of maximum power output Optional 60 watt 1 5 ampere 25 ohm output Option W60 is available for the 805 only as a factory installed option Heater output Monitor LED display continuously shows heater output as a percentage of output range with a resolution of 1 Control Sensor Either Sensor Input selected from rear panel GENERAL Sensor Voltage Monitor Buffered output of each diode sensor voltage for standard configuration For 6 option module voltage output times 0 455 For positive temperature coefficient modules P2 P3 R1 buffer is sensor voltage output times 10 Model 805 Response time electronics Display update cycle time of less than 1 second 650 msec typical 2 seconds 3 readings on channel change or step change IEEE 488 Interface Option Allows remote control of setpoint gain reset units display sensor and heater power range Provides output of display display units and all front panel functions RS 232C Interface Option Controls same parameters as IEEE 488 Interface Dimensions Weight 216mm wide x 102mm high x 381mm deep 8 5in x 4in x 15in 5 5 kilograms 12 pounds Power 100 selected via instrument off 120 220 or 240 VAC rear panel with 50 or 60 Hz 75 watts Accessories Supplied Mating connector for sensor monitor connector operations manual COPYRIGHT 10 87
113. r occurs when more than 256 characters are input to the FIFO buffer of the unit Any characters received after the 256th character are lost Input Overload When an input signal which exceeds the maximum allowed for that input is applied the error occurs When the error occurs the displays OL if it is the DISPLAY SENSOR input and stores OL in either the WS and or WC data locations Continued on next page 2 COPYRIGHT 5 88 Error Code Possible Cause Corrective Action Unrecognized A Input Card type The 805 Series cards and Smart microprocessor controlled Input Cards tell the main processor what card type they transmitted the error could be caused by the Input Card not being present or if the card had a selection switch de selected for example if it were not pressed correctly or came out of detent in shipping When the error occurs the unit displays dashes if it is the DISPLAY SENSOR input and continues operation until the fault is corrected The error is stored in the WI A Input data location and is displayed when the IOCAL key is pressed to determine the Input Card type Unrecognized B Input Card type Operation is the same for Err25 except the error is stored in the WI B Input data location Incorrect A Input Card polarity The 805 Series Input Cards determine the input signal polarity doesn t match the temperature coefficient of the sensor type selected there is either an error in the sensor wiring an ope
114. r panel mounted D style con nector for the connection of two 2 3 5 Rack Mounting sensors The connection definition for the sensor s is given in Table The 805 can be installed in a stan 2 2 and is shown in Figure 2 2 dard 19 inch instrument rack by Table 2 2 Jl SENSORS MONITORS Connections A Input V Input SHIELD A Input 13 I A Input 14 I A Input SHIELD B Input TI B Input V B Input I B Input 6 V Buffered Sensor V Option 8055 7 V Output Signal A V Analog Output 8 Buffered Sensor 5 VDC 10 mA LIMITED Output Signal B DIGITAL GROUND 2 2 COPYRIGHT 10 87 Model 805 Figure 2 2 Sensor Connections 13 1 1 V _ a 2 Lead Sensor 4 Lead Hook up e g Platinum Silicon Diode 2 V 14 1 13 1 V b 2 Lead Sensor 2 Lead Hook up e g Silicon Diode 2 V 14 jy The use of a four wire connection Figure 2 2a is highly recommended for resistive elements to avoid introducing IR drops in the voltage sensing pair which translates into a temperature measurement error An alternate two line wiring method Terminals 1 and 13 shorted to each other 2 and 14 shorted to each other may be used for the DT 470 and TG 120 series diodes in less critical applications where lead resistance is small and small read out errors can be tolerated b Measurement errors due to lead
115. range Any DT 470 series silicon diode 1 20 series gallium aluminum arsenide PT 100 series platinum or RF 800 series rhodium iron sensor can be utilized Requires that an appropriate calibration be purchased for the sensor Up to ten calibrations can be stored Input Conversion Modules 805 6 6 Volt conversion for TG 120 series diodes 805 P2 805 P3 805 R1 8053 RS 232C Interface Option Card Permits 100 ohm platinum conversion module 1000 ohm platinum conversion module 27 ohm Rh Fe conversion module Table of Specifications for Input Conversion Modules Sensor Input Conversion Temperature Module Range T 470 Standard or Config T 500 uration Diodes 1 4 to 325K or 1 4 to 475K Sensor Excitation Current Applicable Sensor Standard Input Sensor Range Response Resolution Curve Curve 10 0 3V 0 1mV or 0 05mV DRC Curves D and 1 Monitor Output Signal remote control with corresponding output display of all front panel functions 8054 IEEE 488 Interface Option Card May be used in lieu of RS 232C above Permits same remote control capability 8055 Analog output option card 0 1V W60 60 watt output stage for 25 ohm heater 1 5A 40V HTR 50 50 ohm cartridge heater 50 watt 1 4 6 35mm dia x 1 25 4mm long HTR 25 25 ohm cartridge heater 25 watt 36 9 5mm dia x 1 25 4mm long 8271 11 Sensor heater cable 10 ft 3m long Cable with a 24
116. rease 5 5 6 2 Reset Set up the con troller as instructed in step 5 5 6 1 Enter a gain and setpoint value that results in less than full power to the load If a Reset value is now entered the instru ment will try to integrate out the error With a test resistor in the control sensor input and a fixed setpoint the error signal will be constant With a constant error 5 3 Section the Reset will continue to increase the analog output control signal until the heater display reads 100 percent If the heater output in creases to approximately 100 per cent for these conditions the reset circuit is operating 5 5 7 Checking the Heater Ranges 5 5 7 1 Standard 25 Watt output Set up the unit so that 100 percent is output to the heater load At full power out on the Max or HI scale 1 amp should be through the resistor as long as the resistor is 25 ohms or less The heater circuit has a compliance voltage limit of 25 volts so a resistor larger than 25 ohms will limit the current to 25 divided by the load s Resistance If the next lower range MED is selected then the heater will put 0 33 amps through the resistor at 100 percent The LO range low will output 0 10 amps at full scale output 5 5 7 2 W60 60 Watt Option If the unit has a W60 output option the Max or HI scale has a 1 55 amp 40 volt limit If a 25 ohm resistor is used the controller will supply 60 watts to the load If a 100 ohm resistor is used on t
117. rogrammed calibration to read temperature Accuracy and resolution is 0 003 ohms or equivalent temperature COPYRIGHT 10 87 Model 805 Table 1 2 INPUT CHARACTERISTICS Inputs Two Sensor Inputs Control Sensor A or B selected via rear panel switch and indicated on the front panel Display sensor A or B can be selected from front panel or interface independent of control sensor The input charac teristics are a function of Input Conversion Module Installed The 805 can accommodate separate input modules for the A and B input This allows concurrent use of different sensor types Input Conversion Modules Standard configuration for the 805 is both inputs set up to use DT 470 series silicon diode sensors 0 3V Optional input conversion modules allow the 805 to be used with TG 120 series diode sensors 0 6V as well as PT 100 series 100 1000 ohm platinum RTD s and RF 800 series rhodium iron sensors Input Conversion Module Sensor Type one per input 6 6 volt diodes e g TG 120 P2 100 ohm Platinum p3 1000 ohm Platinum R1 27 ohm rhodium iron To read correctly in a temperature scale these modules require the use of calibrated sensors and the 8001 Precision option for the 805 Sensors Ordered Separately 805 with input conversion modules will handle all types of diodes as well as platinum and rhodium iron RTD s and other positive temperature coefficient resistors with proper choice of input See
118. s This module may be field installed Sensor Excitation 1 0 mA 0 005 Temperature Resistance Range Temperature range depends Sensor Resistance displayed from 0 0 to 300 0 ohms Resolution temperature 0 01 ohm or equivalent 1 4 Model 805 Sensor order separately Configuration optimized for PT100 Series Platinum Sensors or other 100 ohm at 0 C positive temperature coefficient Sensor Sensor Response Curve Platinum Sensor response curve is based on 0 1 interchangeability at 0 c and temperature coefficient 0 100 C of 0 00385 9C Accuracy conforms to DIN 43760 tolerances plus display electronics Special calibrations can be accommodated with 8001 Precision Option Sensor Power Dissipation Dissipa tion is the product of sensor excitation current squared and the Sensor resistance 1000 OHM PLATINUM MODULE 805 P3 1000 Ohm Platinum Sensor Module Essentially the same as the P2 except accommodates 1000 ohm Platinum Sensor or any other 1000 ohm metallic sensor Sensor excitation is 0 1 milliampere Unit reads resistance in ohms and Gisplays 0 to 3000 ohms Accuracy is 0 1 ohm or equivalent tempera ture 27 OHM RHODIUM IRON MODULE 805 R1 27 ohm Rbodium Iron Sensor Module Essentially the same as P2 except accommodates 800 4 Rhodium Iron Sensor Sensor excitation is 1mA Unit reads resistance in ohms and displays 0 00 to 299 99 ohms Requires calibrated sensor and p
119. s plus up to 2 Terminators where the N4 N5 variations are the same as for WO see below Sample WS and Set Point WP Data NIN N3 NA NSNgN 5 Ng 15 characters plus up to 2 terminators where may vary in position dependent on units and temperature N17N4 is the Sign Display Sensor reading and units N5 Ng is the Sign Set Point and units Examples of the Display reading are N4N5N3 N4 F N1N2N3 N4 R or N1 N2N3N4 V Note that all are free field where the units are K C F V or R and the sign may be for the and C scales COPYRIGHT 4 88 LSCI Section IV Model 805 4 11 SAMPLE PROGRAMMING 4 11 1 HP86B Keyboard Interactive Program The following program for the HP86B is an interactive program with the keyboard of the computer For example when the user sees the prompt on the screen and types in a valid Model 805 command such as WO the program will result in the display of the Model 805 response on the screen 10 REM Set IEEE Address to 12 20 REM Address Switch 1 OPEN 0 to get CR LF 30 REM This program allows the user to communicate with the 805 interactively from the computer keyboard 40 DIM 100 Must be increased for curve information 50 INPUT B INPUT KEYBOARD COMMAND 60 OUTPUT 712 BS SEND COMMAND TO 805 70 ENTER 712 A RECEIVE ANSWER FROM 805 80 DISP AS DISPLAY ANSWER 90 GOTO 50 100 END 4 11 2 National Instruments GWBASIC or BASIC
120. settings range from 990 to 1 second full clockwise on a logarithmic scale Detented counterclockwise setting is off Refer to Figure 3 3b and Table 3 1 for nominal values Table 3 1 Reset Settings SETTING LOG 3 8 5 HEATER The HEATER display can be set to read in per cent of power I Inax or percent of maximum current by the position of switch 1 of the internal configuration dip switch package S4 which is located on the main board The instrument is shipped from the factory with switch one of S4 off which results in the display reading in per cent COPYRIGHT 10 87 Section III power The HEATER display is located directly below the sensor display It displays the magnitude of the heater power or current in per cent of full scale 0 100 Full scale in power is defined as the product of the load resistance times the HEATER POWER range set ting 3 8 6 HEATER POWER Range The HEATER POWER setting is deter mined by the switches on the front panel labeled HEATER POWER HI corresponds to 100 or 1 while MED and LO correspond to 1071 and 1072 respectively Full scale in cur rent is either 1 ampere 300 milli amperes or 100 milliamperes which correspond to the HEATER POWER range settings of HI MED or IO respectively The power output stage can be turned OFF by depressing the 10 MED or HI button whose annunciator is on This action turns off the output power independent of the set point and t
121. sion of the P the gain change would be ignored if it was in the 50 one or two numerics may have been generated If the error were detected in the W the interface may not respond in which case it would need to see another Output Statement command If the error was in the 1 the interface may or may not have responded with data it may default to WO Although errors rarely occur it is suggested that any commands sent to the 805 be echoed back by sending the appropriate Output Statement command and inputting the stored parameters Any error that is detected is cleared following the first transmission after the error Table 8053 5 Interface Error Codes Error Possible Cause Parity Error may be caused by signal line transients or incorrectly specified parity Overrun Error caused by the main processor not reading the input character before the next one becomes available The overrun character s are lost Framing Error may be caused by signal line transients or incorrectly specified stop bits or or character length Input Buffer Overrun caused by more than 256 characters being input input to the FIFO buffer Any characters received after the 256th character are lost COPYRIGHT 12 87 Model 8053 RS 232C Interface 8053 7 INTERFACING EXAMPLES Half Example 1 HP 86B Computer Duplex Without Handshake The HP82939A Serial Interface for the HP 86B is preset at the factory for the foll
122. ter On Reserved Reserved Curve Bit 3 Curve Bit 2 Curve Bit 1 Curve Bit 0 Section Table 2 3 gives the position of the ID switches to call up standard curves stored in the instrument Information on Precision Option Curves is given in Appendix B Curve 2 and Curve 4 differ in that Curve 2 has an upper tempera ture limit of 325K which limits the set point between 0 and 325K while Curve 4 has an upper limit of 475K and a corresponding upper limit for the set point Table 2 3 SENSOR ID Curve Address SENSOR ID Switch Curve Description et Ru 5 6 7 8 Refer to SECTION III for more information on sensor selection and the operation of the SENSOR ID switches 2 3 9 Heater Power The heater output leads should be electrically isolated from the sen sor s ground s to preclude the possibility of any of the heater current affecting the sensor input Signal The heater leads should not run coincident with the sensor leads due to the possibility of capacitive pick up between the two sets of leads If they are in close proximity they should be wound so as to cross the sensor leads at ninety degrees if at all possible The heater output is a current drive and does not have to be fused The 805 is designed to work with a 25 ohm heater for maximum heater output 25 watts If a smaller resistance is used the maximum heater power corresponds to the heater resistance i e 10 2 4 Mod
123. the following order MODEL 805 MAIN BOARD Component Layout Diagram Replaceable Parts List Schematic Power Supply Schematic Current Sources Schematic Analog Voltage In Out Schematic Digital Section Schematic Slot Interconnections MODEL 805 ANALOG BOARD Component Layout Diagram Replaceable Parts List Schematic Sheet 1 Schematic Sheet 2 MODEL 805 DISPLAY BOARD Component Layout Diagram Replaceable Parts List Schematic MODEL 805 MICROPROCESSOR CARD Component Layout Diagram Replaceable Parts List Schematic COPYRIGHT 1 88 LSCI 5 9 or u CO 959 ss9 Tg es dl tdl 185 Da SM 8 SLH bLH Model 805 SECTION OPTION AND 6 1 INTRODUCTION This section contains a brief description of the options and accessories available for the Model 805 Temperature Controller Each Option Input Module and accessory is listed by part number in Table 6 1 Table 6 1 Option and Accessories Model 805 Temperature Controller PART DESCRIPTION NUMBER INPUT CONVERSION MODULES Model Conversion Input Module 805 6 6 volt conversion for TG 120 Series Diodes 805 P2 100 ohm platinum 805 P3 1000 ohm platinum 805 R1 27 ohm Rh Fe ACCESSORIES 106 250 Model 805 Connector Kit RM 3H1 Rack Mounting Kit RM 3H2 Rack Mounting Kit 8072 IEEE 488 Interface Cable 8271 11 Sensor Heater Cable 8271 12 Sensor Heater Output Cable HTR 25 25 ohm cartrid
124. trument having address 12 805 to go into the remote mode 4 5 2 The Universal Commands shown in Table 4 3 are those multiline commands that address all devices on the bus A multiline command involve a group of signal lines All devices equipped to implement such commands will do so simul taneously when the command is transmitted As with all multiline commands these commands are transmitted with line asserted low There are two Universal commands recognized by the Model 805 LLO Local Lockout and DCL Device Clear LLO Local LOckout LIO is sent to instruments to lock out prevent the use of their front panel controls DCL Device CLear DCL is used to return the Model 805 to the power up conditions Table 4 3 488 Bus Commands Message ME uo CHR Commands Remote REN Interface Clear IFC Universal Commands Local Lock Out LLO 1107 Device Clear DCL clr7 Addressed Commands Selected Device Clear SDC clr712 Go to Local GTL 1c1712 Unaddress Commands Unlisten UNL Untalk UNT IEEE 488 Bus p Pus Formae REMOTE712 U is the controller computer Talk Address Address 21 COPYRIGHT 4 88 LSCI Section IV 4 5 3 The Addressed Commands shown in Table 4 3 are multiline commands that must include the Model 805 listen address before it will respond to the command in question Note that only the addressed device will respond to these commands The Model 805 recogni
125. uest to Received Line Signal Detector Data Terminal Ready Data Set Ready Signal Ground Protective Ground Transmitted Data Received Data Request to Send Clear to Send Received Line Signal Detector Data Terminal Ready Data Set Ready Signal Ground COPYRIGHT 12 87 805 Figure 8053 6 General Serial Interface Interconnection for Half Duplex without Handshake Protective Protective Ground Ground Transmitted Transmitted Data Data Received Received Data Data Signal Signal Ground Ground Note It may be necessary to jumper pins 5 6 8 and 20 to disable the handshake functions of the Host This is not required for the 8053 Interface 8053 8 REPLACEABLE PARTS See Figure 8053 1 COPYRIGHT 12 87 Model 8053 RS 232C Interface 8053 7 REPLACEABLE PARTS LIST 8053 RS 232C INTERFACE OPTION 106 249 105 408 104 053 104 310 104 203 104 523 104 722 103 991 CABLE 8053 TO MB 25 PIN RA D STYLE CONNECTOR RS 232C DIP SWITCH 8 POS IC BAUD GENERATOR IC 8 BIT MULTIPLEXER IC QUAD 2 INPUT NOR IC UART IC LINE DRIVER CR YSTAL 1 8432 MHZ DBL 25S 2 76SB08 MC14411 DM81LS95AN 741 502 8251 LT1080 MP 2 1 8432 MHZ 31NICSO8 01190 32Y 31N JeC S8 C308 IION ONT SOINOHLOANJ 3H0HS 3MY1 2 00 Se NId L Nid 2051 CN 310N n
126. used to fit the precision option data to within a few millikelvin over the entire temperature range 3 4 CONTROL FUNDAMENTALS An application note entitled Fun damentals for Usage of Cryogenic Temperature Controllers is in cluded as an appendix in this man ual and should be read in detail if you are not familiar with cryogenic temperature controllers 3 5 CONTROLS AND INDICATORS Figures 3 1 and 3 2 identify the 805 displays annunciators con trols and connectors The iden tification of each item is keyed in the appropriate figure FRONT PANEL DESCRIPTION 3 6 POWER ON OFF Switch Before connecting AC power to the 805 make sure the rear panel volt age selector is set to correspond to the available power line volt age Be certain the correct fuse is installed in the instrument Section 2 3 1 3 6 1 POWER UP SEQUENCE Immediately on POWER ON the 805 runs through a power up sequence as follows 3 1 Section III 1 The Display indicates 8 8 8 8 and the Heater indicates 188 In addition all annunciators and LED s are turned on The LED s include SENSOR CONTROL SENSOR A and B as well as four sets of units HEATER POWER LO MED HI and 2 decimal points for set point an ohms indicator and with an optional computer interface the LOCAL REMOTE indicators 2 Next the unit displays 805 in the display window and if pre sent indicates the IEEE 488 interface address in the HEATER
127. ut leads This cable is constructed from six individually shielded twisted pairs 6 1 Section VI and mates to Jl the 24 pin D style connector and the banana output for power on the back of the Model 805 The other end of this cable is unterminated and ready for the user to add the system connector 6 3 5 8271 12 Sensor Heater Output Cable The 8271 12 Sensor Heater Output Cable is the same as the 8271 11 Sensor Heater Cable with the addi tion of the monitor output of sen sor voltage and connections for the optional analog output Con struction is from three overall shielded twisted pairs 6 4 OUTPUT POWER OPTION 6 4 1 W60 Output Stage The W60 output stage for the Model 805 Temperature Controller replaces the standard 25 watt output stage with an output which is rated at greater than 1 5 amperes with a compliance of up to 43 volts re sulting in a maximum power output approximately 60 watts into a 25 ohm load Note The W60 is a factory in stalled option and should be used with a 25 ohm load Use of a load less than 25 ohms will result in excessive power dissipation by the output stage of the controller and heat buildup within the unit Model 805 6 5 INTERFACE OPTIONS 6 5 1 Model 8053 RS 232C Interface The 8053 RS 232C Interface is de signed to be installed in an 805 and provides an interface with an external RS 232C instrument such as a computer modem or CRT The interface operates in a half dupl
128. value of 30 i e only the last value sent over the bus for that program code will be entered after the appropriate terminators have been sent over the bus 4 10 1 Output Data Statements The Model 805 s Output Requests for Data Statements are summarized in Table 4 5 The Model 805 will always respond when asked to talk with the last command sent to it i e if WO is sent once then the 805 will always output the WO information whenever it is asked to talk as long as it has not received another output data statement 4 10 2 The WO Data String The following example in HP Basic illustrate the commands associated with obtaining output data from the Table 4 10 Section IV Model 805 The addition of the MO command returns the instrument to front panel control where it stays even when data is requested from the 805 by the HP computer 10 DIM A 19 20 OUTPUT 712 WOMO 30 ENTER 712 A The following information is sent across the bus in the IEEE 488 format as a result of the above software commands Command mode sent U W O CR LF Data returned 5 L 123 45K 123 40K CR LF L pata returned 805 s Talk Address BUS CONTROLLER s Listen Add Universal Unlisten Command The data above indicates that the display temperature is 123 45K and that the set point is 123 40K Model 805 Output Data Statements Output of Instrument Data Sample Sensor Data N1NoQN3 N4N5 8 Character
129. zes two of the Addressed commands SDC Selective Device Clear and GTL Go To Local SDC Selective Device Clear The SDC command performs essentially the same function as the DCL command except that only the addressed device responds Generally instr uments return to their power up default conditions when responding to the SDC command GTL Go To Local The GTL command is used to remove instruments from the remote mode With some instru ments GTL also unlocks front panel controls if they were previously locked out with the LLO command 4 5 4 The Unaddress Commands The Unaddress Commands in Table 4 3 are used by the BUS CONTROLLER to remove any TALKERS or LISTENERS from the bus The ATN line is asserted low when these commands are asserted UNL Unlisten LISTENERS are placed in the listener idle state by the UNL command UNT Untalk Previous TALKERS will be placed in the TALKER idle state by the UNT command Table 4 3 summarizes the IEEE 488 Bus Commands acknowledged by the Model 805 4 5 5 Device Dependent Commands The Model 805 supports a variety of device dependent commands to allow the user to program the instrument remotely from a digital computer and to transfer measurements to the 4 6 Model 805 computer These commands are sent from the computer BUS CONTROLLER to the Model 805 as one or more ASCII characters that tell the device to perform a specific function For example the comman

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