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User`s Guide Models 612 and 614 Cryogenic Temperature Monitor

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1. T K Volts mV K 1 4 1 63864 36 56 4 2 1 53960 33 91 10 1 35568 26 04 20 1 18193 11 34 30 1 10465 3 12 50 1 07188 1 46 77 35 1 02511 1 69 100 0 98615 1 85 150 0 88988 2 03 200 0 78311 2 17 250 0 67124 2 28 300 0 55674 2 36 355 0 42759 2 33 400 0 32161 2 38 450 0 20231 2 37 500 0 09077 2 12 nocoyrC S800 Silicon Diode Name Cryocon S800 Configuration Diode T K Volts mV K 1 4 1 87515 36 86 4 2 1 75099 49 16 10 1 47130 43 45 20 1 18867 15 93 30 1 10594 3 90 50 1 07079 1 47 77 35 1 02356 1 86 100 0 98170 1 85 150 0 88365 2 03 200 0 77887 2 13 250 0 67067 2 20 300 0 55955 2 22 355 0 44124 2 10 385 0 37611 2 26 Scientific Instruments SI 430 and SI 440 Name SI 430 Diode Configuration Diode Name SI 440 Diode Configuration Diode T K Volts mV K 1 4 1 63864 36 56 4 2 1 53960 33 91 10 1 36317 26 04 20 1 17370 11 34 30 1 10343 3 12 50 1 07399 1 46 77 35 1 02511 1 69 100 0 98740 1 85 150 0 89011 2 03 200 0 78272 2 17 250 0 67085 2 28 300 0 55665 2 36 355 0 42759 2 33 400 0 32161 2 38 450 0 20231 2 37 500 0 09077 2 12 Scientific Instruments Sl 410 Name SI 410 Diode Configuration Diode T K Volts mV K 1 4 1 71488 10 54 4 2 1 64660 32 13 10 1 39562 35 28 20 1 17592 20 43 30 1 10136 1 75 50 1 0
2. IMPORTANT The monitor requires that an Earth Ground reference connection is made at the rear panel Failure to provide this connection will result in erratic measurements and can even damage input circuits The sensor cables provided connect their shields to the monitor s chassis therefore the required Earth Ground can be made by connecting the shield wire at the opposite end to a ground reference point This is usually done by connecting it to the back shell of the cryostat connector NOTE The monitor has a power key on the front panel To turn power ON or OFF press and hold the power e key for two seconds Note The monitor uses a smart power on off scheme When the power button on the front panel is pressed to turn the unit off the instrument s setup is copied to flash memory and restored on the next power up If the front panel button is not used to toggle power to the instrument the user should configure it and cycle power from the front panel button one time This will ensure that the proper setup is restored when AC power is applied While the Power Up display is shown the monitor is Cryomagnetics Model 612 performing a self test procedure that verifies the proper SN 209999 Rev 1 01D function of internal data and program memories remote IP 192 168 0 4 interfaces and input channels If an error is detected during IP Rave Mode iad Static this process the monitor will freeze operation
3. Model 612 and 614 Temperature Monitors Navigating the Menu Tree Setup and configuration functions are performed by working with the monitor s menu tree To access this tree from the Home Status display press the Enter e key Navigation through all menus is performed by pressing the INC A or DEC keys A cursor will scroll up or down to show additional lines Moving up the tree is done by pressing the Right gt key Note that the Home Status display is at the top of the tree The left most character on each line of a menu is the cursor These cursors are used as follows e Indicates a selectable line Pressing the Enter e key will select the function described on the menu line Indicates that the line is an enumeration field Pressing the Enter e key will cause the cursor to flash Then pressing the INC A or DEC keys will sequence through the allowed choices for the line To make a selection press the Enter e key again To abort the selection process without making any change press either the INC A or DEC key Indicates that the selection is a numeric entry field To change the value displayed press the Enter e key and the cursor will flash Then press the INC A key to increment the number or the DEC W key to decrement the number When the desired value is shown press the Enter e key Or to abort entry without making any changes press either the INC A or DEC key Note that it is
4. Input Connectors Two DB 9 connectors Model 614 or one Model 612 provide 4 wire measurement for the appropriate amount of sensors Any input connector can also be used for the dual thermocouple option connection LAN A standard RJ 45 Ethernet connector is used for connection to a local area network This connector can 101 also used for the Power over Ethernet connection Power input The external power supply provided with the monitor accepts 100 240VAC 50 60Hz and outputs 12VDC 1 0A This may be plugged directly into the monitor s power jack Alternatively any supply from 7 5 to 48V AC or DC with a capacity of greater than 10VA may be used The jack is 2 1mm with positive voltage on the center and negative on the sleeve Power Over Ethernet is also supported An IEEE 802 3AT Power Over Ethernet hub or injector is required Plug the cable from this device into the Ethernet input of the monitor In this case the power jack should not used IMPORTANT The monitor requires that an Earth Ground reference connection is made at the rear panel Failure to provide this connection will result in erratic measurements and can even damage input circuits The sensor cables provided connect their shields to the monitor s chassis therefore the required Earth Ground can be made by connecting the shield wire at the opposite end to a ground reference point This is usually done by connecting it to the back shell of the cryos
5. lt CalCur gt 0 183400 465 000000 lt CalCur gt lt CalCur gt 1 866000 1 500000 lt CalCur gt lt Send the end of transmission character gt lt CalCur gt lt CalCur gt Transmission of the calibration curve starts with the first CALCUR tag and ends when the end of 92 transmission character is sent Comments are ignored Script File Example lt xml version 1 0 gt lt Transactions gt lt Model gt Model44 Version 3 06 lt Model gt lt Input gt lt CHA gt lt Command gt input a sensor 20 lt Command gt lt Set to PT100 gt lt Query gt input a temp lt Query gt lt Command gt input a sensor 21 lt Command gt lt Set to PT1K gt lt Query gt input a temp lt Query gt lt Ignore response gt lt CHB gt lt Command gt input b sensor 20 lt Command gt lt Query gt input b temp lt Query gt lt Response gt K lt Response gt lt Command gt input b sensor 21 lt Command gt lt Query gt input b temp lt Query gt lt Input gt lt SensorCurve gt lt User curve 4 gt lt CalCur gt CALCUR 4 lt CalCur gt lt Curve Name gt lt CalCur gt Test S700 lt CalCur gt lt Curve Type gt lt CalCur gt Diode lt CalCur gt lt Multiplier gt lt CalCur gt 1 000000 lt CalCur gt lt Unit gt lt CalCur gt Volts lt CalCur gt lt Curve Entries gt lt CalCur gt 0 163300 lt CalCur gt 0 173300 lt CalCur gt 0 183400 lt CalCur gt 0 19
6. none SENSor 1 NAME Returns the name string at index 1 Factory installed sensors may not be edited by using these commands 73 User Installed Sensor Curves The user may install up to eight custom sensors This table shows the sensor index and default name of the user curves psf ____UserSensora U y O Ps _____UserSensor6 ps _____UserSensor7 Aer Sensors Using the above table the SENSor commands can be used to address the user curves For example INPUT B SENSor 62 assigns input B to user sensor 2 SENSor 64 NAME Returns the name string of user sensor 4 SENSor 63 TYPE ACR sets the type of user sensor 3 to ACR NOTE Factory installed sensors are indexed from 0 to 60 User installed sensors have index values from 61 to 68 corresponding to user curves 1 through 8 74 Sensor Curves on CD The following sensors are available on the CD supplied File Description O 10A constant current excitation Scientific Instruments Inc SI 410 Silicon diode Range 1 5 to 450K Curve10 crv Lakeshore Curve 10 Silicon diode curve for DT 470 series diodes Range 1 4 to 495K Curve11 crv Lakeshore Curve 10 Silicon diode curve for DT 670 series diodes Range 1 4 to 500K PT100385 crv Cryocon CP 100 DIN43760 or IEC751 standard Platinum RTD 1002 at 0 C Range 23 to 1020K PT1K385 crv DIN43760 or IEC751 standard Platinum RTD 10002 at 0 C Range 23 to 1020K PT1003902 crv Plat
7. y a INNOVATIVE TOOLS FOR SCIENTIFIC RESEARCH User s Guide Models 612 and 614 Cryogenic Temperature Monitor Cryomagnetics Inc 1006 Alvin Weinberg Drive Oak Ridge TN 37830 Tel 865 482 9551 Fax 865 483 1253 www cryomagnetics com Copyright 2014 Cryomagnetics Inc All Rights Reserved Printing History Revision 1 March 2014 Certification Cryomagnetics Inc Cryomagnetics certifies that this product met its published specifications at the time of shipment Cryomagnetics further certifies that its calibration measurements are traceable to the United States National Institute of Standards and Technology NIST Warranty This product is warranted against defects in materials and workmanship for a period of one year from date of shipment During this period Cryomagnetics will at its option either repair or replace products which prove to be defective For products returned to Cryomagnetics for warranty service the Buyer shall prepay shipping charges and Cryomagnetics shall pay shipping charges to return the product to the Buyer However the Buyer shall pay all shipping charges duties and taxes for products returned to Cryomagnetics from another country Warranty Service For warranty service or repair this product must be returned to a service facility designated by Cryomagnetics Limitation of Warranty The foregoing warranty shall not apply to defects resulting from improper or inadequate mainten
8. Define global LAN object char IPA 192 168 1 4 Instrumentls IP address on the LAN char tempstr 257 temporary character string Open the instrument If LAN open IPA can t connect LAN close throw Can t talk to instrument y read the IDN string LAN IO IDN tempstr 256 printf IDN is sin tempstr Print IDN read the MAC address LAN IO net mac tempstr 256 printf MAC is s n tempstr Start temperature control LAN IO control Stop temperature control LAN IO stop Read channel B input LAN IO input B tempstr 256 printf Channel B temperature is s n tempstr send compound command to input channel A and wait for it to finish LAN IO INPUT A UNIT S SENSOR 33 OPC tempstr 256 close the instrument LAN close 71 EU Declaration of Conformity According to ISO IEC Guide 22 and EN 45014 Product Category Process Control Equipment Product Type Temperature Measuring System Model Numbers Model 612 and Model 614 Manufacturer s Name Cryocon Inc Manufacturer s Address P O Box 7012 Rancho Santa Fe CA 92067 Tel 858 756 3900 Fax 858 759 3515 The before mentioned products comply with the following EU directives 89 336 EEC Council Directive of 3 May 1989 on the approximation of the laws of the Member States relating to electromagnetic compatibility 73 2
9. Dual thermocouple Input Module Field installable Supports all 4039 005 thermocouple types 4001 003 Single Power over Ethernet Power injector 4001 002 IEEE 488 2 GPIB Option Field installable 4001 001 USB 2 0 Option Serial Port Emulation Field installable 04 0281 Relay connector 4 pin detachable terminal block Table 1 Model Identification Supplied Items Verify that you have received the following items with your monitor If anything is missing contact Cryomagnetics Inc directly Cryogenic Temperature Monitor User s Manual PN CMI TM612 Software CD Version 11 or above PN 4134 029 One or two dual input connector cable assemblies PN 4034 038 External Power Supply 12VDC 1 0A Universal Voltage Input PN 05 0006 Certificate of Calibration Oocooo oO Apply Power to the Monitor The external power supply provided with the monitor accepts 100 240VAC 50 60Hz and outputs 12VDC 1 0A This may be plugged directly into the monitor s power jack on the rear panel Alternatively any supply from 7 5 to 48V AC or DC with a capacity of greater than 10VA may be used The monitor also supports Power Over Ethernet so that power and communications can both be provided by the Ethernet input An IEEE 802 3AT Power Over Ethernet hub or injector is required Simply plug the cable from this device into the Ethernet input of the monitor In this case the power jack should not used
10. 0 97 2363 86 1277 0 48 3600 49 5164 0 96 2376 63 1303 0 47 3652 13 5388 0 95 2389 66 1331 0 46 3706 01 5624 0 94 2402 97 1359 0 93 2416 56 1388 0 92 2430 44 1417 0 91 2444 61 1449 Cryocon R400 Ruthenium Oxide Sensor The Cryocon R400 with 100uV AC excitation Temp K Ohms Ohms K Temp K Ohms Ohms K Temp K Ohms Ohms K 300 00 1000 0 08 0 98 2351 1251 00 0 49 3551 4956 00 200 00 1008 0 13 0 97 2364 1277 00 0 48 3600 5164 00 100 00 1025 0 33 0 96 2377 1303 00 0 47 3652 5388 00 80 00 1032 0 49 0 95 2390 1331 00 0 46 3706 5624 00 60 00 1042 0 84 0 94 2403 1359 00 0 45 3762 5877 00 40 00 1058 1 50 0 93 2417 1388 00 0 44 3821 6149 00 20 00 1101 4 08 0 92 2430 1417 00 0 43 3883 6439 00 15 00 1127 7 20 0 91 2445 1449 00 0 42 3947 6751 00 10 00 1178 15 40 0 90 2459 1481 00 0 41 4014 7086 00 9 00 1195 18 80 0 89 2474 1514 00 0 40 4085 7447 00 8 00 1216 23 60 0 88 2489 1548 00 0 39 4160 7837 00 7 00 1243 30 50 0 87 2505 1583 00 0 38 4238 8259 00 6 00 1277 40 90 0 86 2520 1621 00 0 37 4321 8715 00 5 00 1325 57 80 0 85 2537 1658 00 0 36 4408 9212 00 4 50 1356 70 50 0 84 2553 1697 00 0 35 4500 9753 00 4 30 1371 76 90 0 83 2570 1738 00 0 34 4598 10343 00 4 20 1378 80 40 0 82 2588 1781 00 0 33 4701 10989 00 4 00 1395 88 20 0 81 2605 1824 00 0 32 4811 11699 00 3 90 1404 92 60 0 80 2624 1869 00 0 31 4928 12481 00 3 80 1413 97 30 0 79 2642 1917 00 0 30 5053 13345 00 3
11. 7647 10 163317 3907 20 138709 1400 30 128199 745 40 122128 474 100 108595 108 200 102432 34 273 100604 0 05 Name SI RO 600 Config ACR T K Ohms QIK 0 05 29072 628083 0 1 13114 145658 0 2 6996 30943 0 3 5053 13345 0 5 3503 4760 1 2327 1203 1 4 1985 660 6 2 1723 343 5 3 1508 152 4 4 2 1378 80 4 6 1277 40 9 10 1178 15 4 20 1101 4 08 30 1053 4 0 40 1009 3 5 Scientific Instruments RO 105 Name SI RO 105 Config NTC10uA T K Ohms QIK 2 239556 17787 3 221769 13961 4 207807 11343 6 187171 7647 10 163317 3907 20 138709 1400 30 128199 745 40 122128 474 100 108595 108 200 102432 34 273 100604 0 05 99 An external thermocouple module is required K uv pvIK 3 2 6457 7 0 74 K uv uv K 10 6448 5 2 01 3 2 9834 9 1 59 10 5 6447 4 2 12 4 2 9833 2 09 20 6417 8 4 15 10 9813 3 4 66 30 6365 1 6 39 20 9747 8 51 40 6290 8 61 30 9643 8 12 1 50 6193 3 10 7 40 9505 5 15 5 75 5862 9 15 6 50 9334 2 18 7 100 5417 6 19 9 75 8777 7 25 6 150 4225 5 27 5 100 8063 4 31 4 200 2692 8 33 5 150 6238 1 41 2 250 897 6 38 200 3967 4 49 3 273 15 0 39 4 250 1328 7 56 300 1075 3 40 6 273 15 0 58 5 350 3135 8 41 5 300 1608 61 1 400 5200 40 8 350 4777 7 65 6
12. 8270 3 5000 26 0 4353 350 0000 66 0587 55 0000 06 8340 3 2500 27 0 4467 345 0000 67 0673 50 0000 07 8390 3 0000 28 0 4581 340 0000 68 0753 45 0000 08 8460 2 7500 29 0 4695 335 0000 69 0842 40 0000 09 8520 2 5000 30 0 4808 330 0000 70 0870 38 0000 10 8560 2 2500 31 0 4922 325 0000 TI 0904 36 0000 Ll 8590 2 0000 32 0 5035 320 0000 72 0941 34 0000 12 8630 1 7500 33 0 5148 315 0000 13 0974 32 0000 13 8660 1 5000 34 0 5261 310 0000 74 1011 30 0000 35 0 5373 305 0000 75 1054 28 0000 36 0 5485 300 0000 76 1108 26 0000 36 0 5596 295 0000 77 1238 24 0000 38 0 5707 290 0000 78 1650 22 0000 39 0 5900 280 0000 79 2070 20 0000 40 0 0131 270 0000 80 2290 19 0000 84 Cryocon 900 Silicon Diode The Cryocon S900 Silicon diode sensor with a 101A excitation current Volts 0 09077 0 09281 0 11153 0 13320 0 15565 0 17873 0 20231 0 22623 0 25016 0 27403 0 29785 0 32161 0 34532 0 34768 0 36898 0 39261 0 41620 0 43976 0 46330 0 48681 0 51024 0 52192 0 53356 0 54516 0 55674 0 56828 0 57980 0 59131 0 60279 0 61427 0 62573 0 63716 0 64855 0 65992 0 67124 0 68253 0 69379 0 70503 0 71624 0 72743 0 73861 0 74978 0 76094 0 77205 0 78311 0 79412 0 80508 0 81599 0 82680 0 83754 0 84818 0 85874 Temp K 500 00 499 00 490 00 480 00 470 00 460 00 450 00 440 00 430 00 420 00 410 00 400 00 390 00 389 00 380 00 370 00 360 00 350 00 340 00 330 00 320 00 315 00 310 00 305 00 30
13. Excessive noise pickup especially AC power line noise Check your wiring and shielding Sensors must be floating so check that there is no continuity between the sensor connection and ground Review the System Shielding and Grounding Issues section Note This monitor uses a shielding scheme that is slightly different than some other monitors If you are using cable sets made for use with other monitors some shield connections may need to change If pin 3 of the input connector is connected to the cable shield disconnect it and either re connect the shield to the backshell contact or leave the shield floating No connection should ever be made to pin 3 of the input connector Check for shielding problems by temporarily removing the input connector s backshell If the noise changes significantly current is being carried by the shields and is being coupled into the controller 2 Use a longer display filter time constant to reduce displayed noise Symptom Condition DC offset in temperature measurements Possible causes 1 The wrong sensor type or sensor calibration curve is being used Refer to the Input Channel Configuration Menu section 2 DC offset in cryostat wiring Review the Thermal EMF and AC Bias Issues section Use AC bias if necessary to cancel the offset error 3 A four wire measurement is not being used Some cryostats use a to a two wire measurement internally This can cause offset errors due to le
14. MeNSOrCUrves CEDE 75 User Calibration Curve Pile FOME A AR debi 76 Appendix B Updating Instrument Firmware 0 ccccceeceeseessceesceceseceeecneeseeeeeaeecaecnteeeeaeensees 78 PASCUA O 78 A Gate arash stad caine a Satan Meade a eeatate 78 Appendix C Troubleshooting Guide iis c55 os e asta es E tea Se Sa 2s 81 O ES deuwastlgd banca dele nies ects d E E TA 81 Temperature Measurement Er idas 81 Appendix D Enclostte O pi Gms cunas slo illa 83 Panel Mounting A A a A ES A A AE 83 Appendix ESSE A an eo ad ER S 84 Cryocon S700 Silicon Diode dsd 84 Cryocon S900 Silicon Diod i 85 Cryocon R500 Ruthenium Oxide Sensor rata 86 Cryocon R400 Ruthenium Oxide Sensor ini tin dan id a dad di 87 Sensor Packs A IAEA AOS 88 Appendix F Configuration SEP id 91 Sept File Structures a o de 91 Senp Ele Example Neen ee are ERE a nA eR A a eT YT 93 Appendix G sensor Data Tables inince adas 94 SiHcon Diode een epaite ar ereere a ar a O A 94 Model 612 and 614 Temperature Monitors IATA IOC tases os ar ia Sak Pans ad ia eer ae Nl eg a lend Sal Se acted e E 95 e RD acres tis cca hon O A A A 96 ROU UMAR i 96 CAMA an a a sg 97 RUE IMA AS a A Waseem AAA IEA 98 Appendix H Rear Panel Connections a ca 101 A ocau castes Gauss eateaten ane oe E menue E E a eum eid 101 Sensor CONNECTIONS isr oes nan Scots nada andi vam SU R Penis ate enti een Gein 103 Relay Concise E TEE TA EE EA E aE 106 Ethernet LEANY Gray A e a O o NE OPE ET Ram 106 TEEE 488 2 Conte
15. Therefore anyone with experience in test and measurement will find it familiar e Keywords used in commands are common English words not cryptic acronyms This makes command lines easy to read and understand even for someone that is not familiar with the instrument e The SCPI is a tree structured language where commands are divided into groups and associated commands into sub groups This architecture simplifies composing commands and improves readability Purpose If your intent is to remotely program the instrument with fairly simple sequences you can skip to the section titled Commonly Used Commands This is a simple cheat sheet format list of the commands that are most frequently used If you are an advanced user with a familiarity of the SCPI programming language the section titled Remote Command Descriptions is a complete reference to all commands If you are not familiar with the SCPI language but need to perform advanced programming tasks the SCPI is introduced in the next section For all users the section titled Debugging Tips is often helpful and the Remote Command Tree is a single page listing that shows the syntax of each command 54 An Introduction to the SCPI Language SCPI is an acronym for Standard Commands for Programmable Instruments Commonly called skippy it is an ASCIl based instrument command language defined by the IEEE 488 2 specification and is commonly
16. This criterion for re adjustment provides the best measure of the instrument s long term stability Performance data measured using this method can easily be used to extend future calibration intervals Minimum Required Equipment All calibrations require a computer with a LAN connection to the instrument Additionally reference standards are required for each input range as follows e The Silicon Diode input range Calibration Type I10UA and V10UA requires voltage references of 0 5 and 1 5 Volts DC and a resistance standard of 100KQ e The 100Q Platinum range Type R1MA requires a 100Q and a 100 resistor e The 10 0000 range Type R10UA requires 10KQ and 1KQ resistors The test equipment recommended for complete calibration is a Fluke 5700A DMM calibrator 48 The Basic Calibration Sequence You must first connect the monitor to a computer via the LAN interface and then run the Utility Software provided with the instrument The Utility Software must be version 11 0 0 or higher From the start up menu of the Utility Software click the Connect button in the bottom of the Short Cuts toolbar The software will connect to the instrument and display the connection status below the button To manually calibrate a range select the desired range from the range type tabs and enter the desired Gain and Offset values in the boxes given and then click the APPLY button Gain is a unit less gain factor that is scaled to a nominal val
17. Upper 1000 Lower 100 a 100uA DC Upper 1 0000 Lower 1000 a 10uA DC Upper 10 0009 Lower 1 0000 50 Remote Operation Remote Interface Configuration The monitor has two remote interfaces The 10 100 BaseT Ethernet LAN and the RS 232 There are also two external options IEEE 488 2 GPIB and USB Connection to all of these interfaces is made on the rear panel of the instrument For specifics about the connectors and cables required refer to the section on Rear Panel Connections Supported Ethernet Protocols HTTP The monitor s HTTP server is used to implement the instrument s embedded web server Up to five connections are supported simultaneously and connections are automatically closed after five minutes of inactivity SMTP The Simple Mail Transport Protocol is used to send E mail from the monitor to a selected address E mail is used to report instrument status and is triggered by various user selected events If sending e mail over the Internet is desired the local area network connected to the monitor will have to have an active mail server TIMEP The Time Protocol allows a client to obtain the date and time from a host TIMEP server If a time server is available on the Local Area Network the monitor will periodically query it to update it s internal real time clock TCP IP The Transmission Control Protocol Internet Protocol provides reliable flow controlled end to end communication between two co
18. 3 328 95 58 036 40 373 11 8 392 4 2 277 32 32 209 50 305 19 5 507 6 234 44 17 816 77 35 205 67 2 412 10 187 11 8 063 100 162 81 1 488 20 138 79 3 057 150 112 05 0 693 30 115 38 1 819 200 85 800 0 397 40 100 32 1 252 250 69 931 0 253 50 89 551 0 929 300 59 467 0 173 77 35 70 837 0 510 350 52 142 0 124 100 61 180 0 358 400 46 782 0 093 150 47 782 0 202 420 45 030 0 089 200 39 666 0 130 230 34239 0 090 Lakeshore Cernox CX 1070 300 30 392 0 065 Name User Supplied Config ACR 100mV T K Ohms QIK Lakeshore Cernox CX 1030 4 2 5979 4 2225 3 Name User Supplied Config ACR 6 3577 5 794 30 T K Ohms QIK 10 1927 2 214 11 0 3 31312 357490 20 938 93 46 553 0 4 13507 89651 30 629 90 20 613 0 5 7855 7 34613 40 474 89 11 663 1 2355 1 3265 2 50 381 42 7 490 1 4 1540 1 1264 9 77 35 248 66 3 150 2 1058 4 509 26 100 193 29 1 899 3 740 78 199 11 150 129 60 0 854 4 2 574 20 97 344 200 97 626 0 477 6 451 41 48 174 250 78 723 0 299 10 331 67 19 042 300 66 441 0 201 20 225 19 6 258 350 57 955 0 143 30 179 12 3 453 400 51 815 0 106 40 151 29 2 249 420 49 819 0 094 50 132 34 1 601 77 35 101 16 0 820 97 e an AE ACR 100mV Ruthenium Oxide T K Ohms as 6157 5 450 08 Cryocon R500 The R500 Ruthenium Oxide temperature sensor is 30 3319 7 165 61 f a OTE 055 design
19. 70 1423 102 30 0 78 2661 1966 00 0 29 5186 14303 00 3 60 1433 107 70 0 77 2681 2016 00 0 28 5329 15369 00 3 50 1444 113 70 0 76 2701 2070 00 0 27 5483 16562 00 3 40 1455 120 10 0 75 2722 2124 00 0 26 5648 17901 00 3 30 1467 127 20 0 74 2743 2182 00 0 25 5827 19412 00 3 20 1480 134 80 0 73 2765 2242 00 0 24 6022 21126 00 3 10 1493 143 20 0 72 2787 2304 00 0 23 6233 23081 00 3 00 1508 152 40 0 71 2810 2368 00 0 22 6464 25325 00 2 90 1523 162 70 0 70 2834 2436 00 0 21 6717 27920 00 2 80 1539 173 90 0 69 2858 2507 00 0 20 6996 30943 00 2 70 1556 186 40 0 68 2884 2580 00 0 19 7305 34493 00 2 60 1575 200 40 0 67 2909 2658 00 0 18 7650 38706 00 2 50 1595 216 10 0 66 2936 2738 00 0 17 8037 43758 00 2 40 1617 233 80 0 65 2963 2822 00 0 16 8475 49892 00 2 30 1640 253 80 0 64 2992 2911 00 0 15 8974 57444 00 2 20 1666 276 70 0 63 3021 3003 00 0 14 9548 66902 00 2 10 1693 302 80 0 62 3051 3100 00 0 13 10217 78978 00 2 00 1723 343 50 0 61 3082 3202 00 0 12 11007 94764 00 1 90 1758 355 00 0 60 3114 3309 00 0 11 11955 116005 00 1 80 1793 396 10 0 59 3147 3422 00 0 10 13115 145658 00 1 70 1833 444 90 0 58 3181 3540 00 0 09 14571 189096 00 1 60 1877 503 20 0 57 3216 3665 00 0 08 16462 257192 00 1 50 1928 573 80 0 56 3253 3796 00 0 07 19034 375766 00 1 40 1985 660 60 0 55 3291 3935 00 0 06 22792 628083 00 1 30 2051 768 80 0 54 3330 4082 00 0 05 29073 1 20 2128 906 00 0 53 3371 4237 00 1 10 221
20. NTG Sensor Ass 30 Data Lor ii als 31 Downloading a Sensor Calibration Curve oooooccnocccococononconccconoconnnonn nono nonnonnnn nono ccnn nono nocnnncnnncos 32 Using Them a e Ls a e e e elena 34 Shielding and Grounding Issues A AA 35 Otility Sofware anu dci 37 Installing th Utility SOtiw at Gs aint 37 Connecti gto an Instrument asceten ana a i aiia i a iis 38 Using the Interactive a oda 39 Downloading or Uploading a Sensor Calibration Curve cccccsseceseceseceeeeeeseeceaeeneeeeeeeenaeees 40 Using the Real Time Strip Charts an a As 43 Data Lorna db t 44 CalGen Calibration Curve GENOA td id ae a ae 46 AAS CUI AA A A A EA 48 Calibration Services ias ais 48 Calibration Interval scsi Ossetia ete cage A na he O 48 Minimum Required LE UN dada 48 The Basie Cabra ton EU i 49 S mmary of Calibrations pes ds 49 Calibration of Silicon DIES a ia za 49 Calibration of DC resistors O EEN 50 Remote Oper atl OM ds 51 Remote Interface ont our ation tdi lion 51 Remote Programmi g Guid ii A led tacoma eaves A te Aaa tees 54 General IO VEIN IC W ae Oras ct ans ota aa cata Sanaa shee eh RRA pores am tO Be cl ils cs alae tse 54 An Introduction to the SCPI bang uae isa 55 Remote Command o ds 60 Remote Command Descriptions sia sa 62 CO TPPC A eek aad eee aa EA AAA 71 EU Declaration of CODO Yosio ASA E OS 72 Appendix A Installed Sensor Curves ri tits 73 Factory Installed CUE NS SA 73 ser Installed Sensor UI A a oedema ees Ra ae 74
21. PORT lt port number gt H STATE ON OFF CLS ESE ESR OPC IDN RST SRE STB 61 Remote Command Descriptions IEEE Common Commands CLS The CLS common command clears the status data structures including the device error queue and the MAV Message Available bit ESE The ESE command sets the Standard Event Status Enable ESE Register bits The ESE Register contains a bit mask for the bits to be enabled in the Standard Event Status SEV Register A one in the ESE register will enable the corresponding bit in the SEV register A zero will disable the bit The ESE Query returns the current contents of the ESE register ESR The ESR query returns the contents of the Standard Event SEV status register OPC The OPC command will cause the instrument to set the operation complete bit in the Standard Event SEV status register when all pending device operations have finished The OPC Query places an ASCII 1 in the output queue when all pending device operations have completed IDN The IDN Query will cause the instrument to identify itself The Model 18C will return the following string Cryomagnetics Model 612 lt serial number gt lt firmware revision gt Where lt serial number gt is the unit s serial number and lt firmware revision gt is the revision level of the unit s firmware RST Reset the instrument This will cause a hardware reset in the monitor The reset sequenc
22. Seconds The minimum interval is 0 1 Second E CMI Utility Software dloader Comm Operations Data Logging View Help User Options i Short Cuts Sensor Curve Input Channels Output Channels Download 7 Heater 1 I Channel A PID Table I Channel B TT Heater 2 Download F Channel C Selecta 140009 nares mc D 7 Analog 2 Dc E m Loop Setpoints CalGen m Loop 1 Setpoir Data Loggin rc f Loop gging oop 2 Setpoir Di e SIRO Upload Internal fal Loop 3 Setpoir DataLog ae mie 7 Loop 4 Setpoir Connect Comm Type LAN Status Connected O Cryomagnetics 612 Ver When the Start button is clicked a file selection dialog box will be shown 44 Model 612 and 614 Temperature Monitors pom this na box enter a file name and select the directory where data logging results will be saved Organize y New folder Name Date modified Type JL Sensor Data 5 14 2014 8 08 PM File folder File name Save as type MSExcel Comma Separated Value Files csv y Hide Folders As soon as the Save button is clicked the software will begin continuous data logging to the specified file While data logging is in progress a dialog box will be displayed that allows the user to stop logging When this Stop button is clicked logging is stopped and the log file is closed 45 CalGen Calibration Curve Generator The feature is used to gener
23. T V V Four Wire Four Wire Diode Sensor Resistor Sensor v Figure 4 Diode and Resistor Sensor Connections Thermocouple connections Thermocouple sensors require the use of an external thermocouple module option All thermocouple connections must be made at the module s input connector since this connector is thermally anchored to an internal sensor that is used for Cold Junction compensation Sensor connection is made at the screw terminals Proper polarity of the sensor wires is required Polarity is marked on the input connector and a summary of common thermocouple polarities is given in the table below The input connector should have its plastic back shell and rubber grommet installed in order to prevent local air currents from generating errors in the cold junction circuitry It is recommended that the thermocouple sensor be electrically isolated or floating from any surrounding circuits or grounds This will ensure the highest possible measurement accuracy Additional discussion on thermocouple and grounding issues can be found below in the Using Thermocouple Sensors section below Type Terminal Terminal E Chrome Purple Constantan Red K Chrome Yellow Aluminum Red T Copper Blue Constantan Red Chromel AuFe Chromel Silver Gold Gold Table 20 Thermocouple Polarities 105 Relay Connections Relay connections are made on the rear panel using the 3 5mm 4 pi
24. are indexed from 0 to 61 User installed sensors have index values from 61 to 68 corresponding to user curves 1 through 8 For additional information refer to Appendix A SENSor lt index gt name Name String Sets and queries the name string of the user installed sensor at index lt index gt The name string can be up to 15 ASCII characters SENSor lt index gt NENTry Queries the number of entries in the user installed sensor at index lt index gt Response is a decimal integer ranging from zero to 200 SENSor lt index gt UNITs VOLT LOGOHM OHMS Sets or queries the units of a user installed calibration curve at lt index gt For information on the curve units refer to the User Calibration Curve File Format section SENSor lt index gt TYPe DIODE ACR PTC100 PTC1K NTC10UA Sets or queries the type of sensor at lt index gt For more information on sensor types please refer to the Input Configurations section Index is 0 through 7 SENSor lt index gt MULTiply lt multiplier gt Sets or queries the multiplier field of a user installed calibration curve at lt index gt For information on the multiplier refer to the User Calibration Curve File Format section 68 Network Commands The following commands are used to configure the monitor s Ethernet interface NETWork IPADdress IPA Sets or queries the instrument s IP address The address is expressed as an ASCII string so the input parameter must
25. be enclosed in quotes For example the default IP address parameter is 192 168 1 4 NETWork MACADdress Queries the instrument s MAC address The address is returned as an ASCII string Cryomagnetics MAC addresses range from 00 50 C2 6F 40 00 to 00 50 C2 6F 4f ff They cannot be changed by the user NETWork NAME name The controller contains a unit name string that may be set or queried using this command This can be used to assign a descriptive name to the instrument This command is the same as the SYSTem NAME command NETWork DHCP ON OFF Set or query DHCP enable Changes do not take effect until the next power cycle Mail Commands The monitor can send e mail over the Ethernet port when an alarm condition is asserted on an enabled input channel The following remote commands are used to configure e mail However it is much easier to configure e mail using the instrument s embedded web server MAIL A H ADDR IPA Set or query the e mail server IP address Parameter format is an ASCII string and must be enclosed in quotation marks For example 192 168 0 1 MAIL A H FROM from e mail address Set or query the from e mail address Parameter is an ASCII String For example model18 mynetwork com MAIL A H DEST to e mail address Set or query the from e mail address Parameter is an ASCII String For example model18 mynetwork com MAIL A H PO
26. cD O 28 51 52 VAD VIG WMS icc aos A A AGS 51 patehicables on ate ese e SAA e do do do fe do e Aid ie nee Mahe ohne O 51 106 SMTP hes Siren ie beheld A A A thn ach th Alin AA Me ball he 51 subnetmask aa wane ee Ata A A Weed ei coisa ence UAT a awa LA ALA 52 TOP AP 4 att id 3 51 52 ME dicas 51 O ac ete engl e Ledeen eee aren eed 3 51 108 Factory Defaults NOSUOMING E tern AAA aed AA ee ee ed ee a ae eee 11 Firmware Update Utility FV UIUC sc as oe errs eres te tee sie Ihe eee i BN te ae rece dea ieee eae eae tennant A 78 INtFOGUCHION bh a Bienen inne Aeden A E A did da 78 IEEE 488 address AAA A AA A a threat beh Aiea AAA A AI Ee 63 Config ratlon uti a A A A a a iia 52 A sccscccescus sustains cacsegeuuaeeudaweatesscuusouuaeuadauieas dulduulla sul ueuavedieuUuelusvudaudauusasliens cauateasuaduusassegaruseuddavegusddivleduaeeudadeavenses 107 GPIB PORRA EI NN 52 Specifications ii A AA A A iri ia deve 20 Input Channel alarn outputs ar tl cis recalca enla Leds ld osa iaa errada re a SpE LE 20 A ET E E daidnudanticeddetnsh 2uuseudeutieaStesanudatacultewtvenduadeudesbsabdatcesdestenddetusnnssdeusentssSiennseseeseeiein 20 Input Protection IA toe een A ES A A AAA eR Ne Oe le IS 11 19 Instrument Calibration Calibration teva ia a ES Calibration Services Proc Nai ETEO 48 Keypad POWER KEY iia A A AAA A A a 11 LED indicators Relay ASADA NL ata IS 61 67 XE Relay DEADband DEADband ceccececcceeees
27. differential and have a high impedance to ground This will allow operation with grounded devices in most systems Always ensure that there is no more than a 5V difference between the grounded thermocouple and the instrument s chassis ground Common Error Sources Cold Junction Compensation Cold Junction Compensation in the Cryomagnetics thermocouple module is performed by a circuit that measures the temperature of the input connector pins This reading is then used offset the device s output voltage Errors can be minimized by reducing local air currents around the module Device Calibration Errors Variation in the manufacture of thermocouple wire and it s annealing over time can cause errors in temperature measurement Instruments that measure temperatures above about 0 C will usually allow the user to correct calibration errors by adjusting an offset in order to zero the error at room temperature Unfortunately in cryogenic applications thermocouples lose sensitivity at low temperatures so a single offset voltage correction is insufficient Thermocouples used over a wide temperature range may need to be calibrated at two temperature extremes AC Power Line Noise Pickup AC power noise pickup is indicated by temperature measurements that are significantly in error In extreme cases there may be no valid measurements at all When a grounded sensor is used a poor quality ground may have sufficient AC voltage to exceed the input range o
28. include 100 10 Ethernet and RS 232 An IEEE 488 2 GPIB interface is optional and may be field installed at any time The option consists of an external module that is automatically configured by the monitor A USB 2 0 serial port emulator option is also available Monitors connect directly to any 100 10 Ethernet Local Area Network LAN The TCP and UDP data port servers bring fast Ethernet connectivity to data acquisition software including LabView Using the SMTP protocol the monitor will send e mail based on selected alarm conditions Using the Ethernet HTTP protocol the monitor s embedded web server allows the instrument to be viewed and configured from any web browser El cryormagnetics 612 Y AA Sox C f D 192 168 0120 A n Cryomagnetics 612 Cryogenic Temperature Monitor Ti ti at Ch A Channel A 51 881 K High Alarm Ch B Channel B 3 270 K Relays Relay 1 Source ChA Status Auto High and Low Relay 2 Source ChB Status Auto High and Low aio Date 08 05 2009 Time 13 16 59 Status i atn NewCMI Cryomagnetics 612 204566 2 11E Remote interfaces implement an IEEE 488 2 SCPI compliant remote command language that is easy to learn and easy to read LabView drivers are available for all remote interfaces Remote Command Language The Monitor s remote command language is SCPI compliant according to the IEEE 488 2 specification SCPI establishes a common language and syntax across various
29. is 1 0 for PTC sensors and 1 0 for NTC sensors or diodes The fourth line of the header is the sensor units and must be Volts Ohms or Logohm Curve entries must be the sensor reading followed by the temperature in units of Kelvin Values are separated by one or more white space or tab characters The last line in the file has a single semicolon character All lines after this are rejected It is recommended that the curve back is read after downloading to ensure that the instrument parsed the file correctly This is easily done by using the Utility Software s curve upload function under Operations gt Sensor Curve gt upload 77 Appendix B Updating Instrument Firmware Updates require the use of the Cryomagnetics Firmware Update Utility software and a hex file containing the updated firmware These are available on the Internet Note Updating firmware in any instrument is not entirely without risk Please only perform the procedure when some down time is available The update will abort on the detection of a hardware malfunction Also the update may change instrument features that you are currently using in a different way Factory defaults settings are restored that will erase any existing user calibration curves or PID tables Discussion This instrument has two blocks of flash type program memory In the standard configuration the Internal block contains a boot loader program and the External block contains the act
30. is accessed only via the remote interfaces Calibration of a measurement range is the simple process of generating an offset and gain value However since there are several input ranges available on each sensor input the process can be time consuming Caution Any calibration procedure will require the adjustment of internal data that can significantly affect the accuracy of the instrument Failure to completely follow the instructions in this chapter may result in degraded instrument performance The Utility Software used in this procedure will first read all calibration data out of the instrument before any modifications It is good practice to record these values for future reference and backup Calibration Services When the instrument is due for calibration contact Cryomagnetics for low cost recalibration Calibration Interval The monitor should be calibrated on a regular interval determined by the measurement accuracy requirements of your application A 90 day interval is recommended for the most demanding applications while a 1 year or 2 year interval may be adequate for less demanding applications It is not recommended extending calibration intervals beyond 2 years Whatever calibration interval you select it is recommended that complete re adjustment should always be performed at the calibration interval This will increase your confidence that the instrument will remain within specification for the next calibration interval
31. large bright TFT LCD display a 4 key keypad an audio alarm and three status LEDs Several display formats may be selected Additional screens include temperature readings along with relay and alarm status information Asingle key press takes the screen to a menu tree where most features and functions of the instrument can be configured The status of built in alarms and relays is indicated by LEDs located below the display Input Flexibility Silicon Diode sensors are supported over their full temperature range by using 10uA constant current DC excitation Positive Temperature Coefficient PTC resistor sensors including Platinum and Rhodium lron RTDs use constant current AC excitation Platinum RTD sensors have built in DIN standard calibration curves that have been extended to 14K for cryogenic use Lower temperature use is possible with custom calibrations Auto ranged constant voltage AC excitation is used to provide robust support for cryogenic Negative Temperature Coefficient NTC sensors including Ruthenium oxide Carbon Glass Cernox Carbon Ceramic Germanium and several others Thermocouple sensors are supported by using an optional dual thermocouple module This module plugs into any of the input channels It is powered by the instrument to provide amplification cold junction compensation and connection to copper Input Power The monitors are shipped with a 12VDC 1A external power supply but may be powered by any source
32. logging by continuously reading samples from a connected instrument This is a different function than uploading the internal log buffer from the instrument The internal data logging function does not require a connection to a computer 31 Downloading a Sensor Calibration Curve The monitor accommodates up to eight user defined sensor calibration curves that can be used for custom or calibrated sensors Since these curves have up to 200 entries they are usually maintained on a computer as a text file and downloaded to the controller by using the Utility Software Cryomagnetics sensor calibration curves have a file extension of crv They may be opened and edited with any text editor The format of the file is detailed in Appendix A The process for downloading a sensor calibration curve using the Utility Software is detailed in the section titled Downloading or Uploading a Sensor Calibration Curve This section discusses how to set up a curve specifically for download to the monitor The Utility Software will read and attempt to parse the following file types Sensor Curve File Types Crv Directly supported Supported Reads curve data Header information must be entered by using Lakeshore 340 the header dialog box The Utility Software will convert these files into crv format automatically No header information Columns are reversed from other formats Must be aLe manually converted to a crv file b
33. lt Model gt Model612 Version 2 03 lt Model gt Remote Command lt Command gt lt Command gt Send a remote command to the instrument Commands can be any of the instrument s commands as described in the Remote Programming Guide lt Command gt input c sensor 2 lt Command gt lt Command gt LOOP 1 SOURCE A Setpt 20 0 lt Command gt lt Command gt OVERTEMP ENABLE ON lt Command gt 91 Query lt Query gt lt Query gt Query data from the instrument Queries can be any of the instrument s commands as described in the Remote Programming Guide Query is generally used with a Response tag to compare the instrument s response to an expected value If there is no Response tag the result of the query is printed but not tested for errors lt Query gt input c sensor lt Query gt lt Query gt input b units K units lt Query gt Response lt Response gt lt Response gt Identifies the expected response to a query This tag must always follow a Query tag otherwise it is ignored When the comparison fails an error text message will be displayed and recorded to a file lt Query gt Relays 1 lt Query gt lt Response gt Lo lt Response gt lt Query gt input c units lt Query gt lt Response gt K lt Response gt lt Should be Kelvin Error if not gt Floating Point Response lt Floatresponse gt lt Floatresponse gt Compare the response returned from the instrument against an expected floating point number T
34. m for milliVolts and Q for Ohms Sensor Type Selection Line 2 selects the Sensor type for the input channel When this field is selected the scroll keys are used to scroll through all of the available sensor types Factory installed sensors appear first and then user sensors For a list of factory installed sensors refer to Appendix A Setting a Temperature Alarm The Alarm lines are used to setup alarm conditions The monitor allows alarm conditions to be assigned independently to any of the input channels High temperature low temperature alarms may be entered and enabled or disabled Note that there is a 0 25K hysteresis in the assertion of high and low temperature alarms The deadband field sets how much over or under the setpoint that the input temperature must be before changing the state of the alarm Latched or non latched alarms may be selected Once asserted a latched alarm remains asserted until it is cleared O Note A latched alarm may be cleared by pressing the Right gt key on the front panel when the Home Status screen is displayed Alarm conditions are indicated on the front panel by the Alarm LED and if enabled an audio alarm They are also reported via the remote interfaces Input Channel Statistics Statistics are accumulated on each input channel The accumulated values may be reset by selecting the last line of the menu Reset Statistics The System Setup Menu The System Functions Menu is used t
35. mechanical relay outputs Relays are asserted or cleared based on the temperature reading of selected input channels Each output has a high and low set point that may be enabled from the front panel or a remote interface Furthermore relays can be manually asserted ON or OFF Normally Open contacts are available on the rear panel Contact ratings 10A 125 VAC 5A 250VAC or SA 30VDC Remote Interfaces Ethernet LAN and RS 232 interfaces are standard IEEE 488 2 GPIB and USB are external field installable options All functions and read outs available from the instrument may be completely controlled by any of these interfaces The LAN interface is electrically isolated and is 10 100 BaseT compliant Connection is made via the RJ 45 connector on the rear panel The Serial port is an RS 232 standard null modem with male DB9 connector Rates are 9600 19 200 38 400 and 57 200 Baud When installed the GPIB option is fully IEEE 488 2 compliant Connection is made at the rear panel s LAN port The USB option is a serial port emulator The programming language used by the monitor is identical for all interfaces and is SCPI language compliant The Standard Command Protocol for programmable Instruments SCPI is a sub section of the IEEE 488 2 standard and is a tree structured ASCII command language that is commonly used to program laboratory instruments 20 Model 612 and 614 Temperature Monitors Mechanical Form Factors and Envir
36. return an enumeration parameter in upper case letters Some examples of commands with enumeration parameters are INPut A B C D UNITs K C F S LOOP 1 2 TYPe OFF MAN PID TABLE RAMPP 56 String Parameters String parameters can be up to 15 characters in length and can contain any ASCII characters excluding the double quote String parameters must be enclosed in double quotes For example CONFig 4 NAMe Cold Plate Commonly Used Commands A complete summary of remote commands is given in the User s Manual chapter titled Remote Command Summary The manual also has complete descriptions of all remote commands This section is intended to show a few of the more commonly used commands NOTE Remote commands are not case sensitive Function Command Comment Instrument Identification Returns the instrument identification string in IEEE 488 2 format For Read the instrument example Cryomagnetics Model 612 204683 2 41 identifies the idn identification string manufacturer followed by the model name serial number and firmware revision code Input Channel Commands Parameter for the input is A B C or D corresponding to inputs A B C or D Read the temperature on input Temperature is returned in the current display units Format is a numeric input input b string For example 123 4567 channel B Set the temperature units on input channel A
37. string where indicates that no alarms are asserted SF indicates a Sensor Fault condition HI indicates a high temperature alarm LO indicates a low temperature alarm There is a 0 25K hysteresis in the assertion of a high or low temperature alarm condition The user selectable display time constant filter is applied to input channel temperature data before alarm conditions are tested INPut A H ALARm HIGHest lt setpt gt Sets or queries the temperature setting of the high temperature alarm for the specified input channel When this temperature is exceeded an enabled high temperature alarm condition will be asserted Temperature is assumed to be in the display units of the selected input channel There is a 0 25K hysteresis in the assertion of a high or low temperature alarm condition lt setpt gt is the alarm setpoint temperature INPut A H ALARm LOWEst lt setpt gt Sets or queries the temperature setting of the low temperature alarm for the specified input channel When the input channel temperature is below this an enabled low temperature alarm condition will be asserted Temperature is assumed to be in the display units of the selected input channel There is a 0 25K hysteresis in the assertion of a high or low temperature alarm condition lt setpt gt is the alarm setpoint temperature INPut A H ALARm HIENa YES NO Sets or queries the high temperature alarm enable for the specified input channe
38. support the Diode type is selected The section titled Input Configurations gives complete information on sensor types The Multiplier field is used to select the sign of the sensor s temperature coefficient A value of 1 selects a Negative Temperature Coefficient sensor while a value of 1 selects a Positive Temperature Coefficient The Unit field selects the units used in the calibration curve Choices are Volts Ohms or LogOhm Checking the Save as crv will save the curve to disk as a Cryomagnetics crv file 40 Model 612 and 614 Temperature Monitors The sensor curve may be viewed as a graph by clicking the Display Curve button An example plot is shown here After completing any desired changes in the Edit Curve Header dialog box click Accept to proceed E e en E A C A a a IU A a a al A pee A A E A JN E Ep Then the curve number dialog box will appear A user calibration curve should be entered here For the monitor user curves are 1 through 4 41 When OK is selected the sensor calibration curve will be downloaded to the instrument During the transfer curve data points will be displayed in the window s main pane Upon completion the Download Complete dialog box will appear Dismiss this dialog box to complete the download process ons DataLlogging View 1 667000 8 000000 1 684000 Downloading to User Curve 1 Pleas
39. to Kelvin Choices are K Kelvin C Celsius F Fahrenheit and S native sensor units input a units k Volts or Ohms Read the temperature units on input b units Return is K C F or S channel B Debu 1 Table 14 Commonly Used Remote Commands gging Tips To view the last command that the instrument received and the last response it generated press the System key and then select the Network Configuration Menu The last two lines of this menu show gt and lt characters These two lines show the last command received by the instrument and the last response generated Some commands require the instrument to write to non volatile flash type memory which can be time consuming In order to avoid overrunning the instrument use compound commands that return a value thus indicating that command processing is complete For example INPUT A UNITS K UNITS will respond with the input units only after the command has completed Another example LOOP 1 SETPOINT 1234 5 OPC Here the operation complete command OPC will return a 1 when command processing is complete It is often easiest to test commands by using the Utility Software Run the program connect to the instrument and use the Interact mode to send commands and view the response Alternatively any communications program like Windows Hyperterminal can be used to interact with the instrument via the LAN or serial ports For ease of software devel
40. with an error k message display In this case turn the unit off and refer to Appendix B Troubleshooting Guide Port 5000 Connected 00 50 C2 6F 42 38 NVRAM Valid Self Test Passed Caution Do not remove the instrument s covers or attempt to repair it There are no user serviceable parts jumpers or switches inside the unit Further there are no software ROM chips batteries or battery backed memories All firmware installation and instrument calibration functions are performed externally via the remote interfaces After about ten seconds the self test will complete and the monitor will begin normal operation NOTE The monitor attempts to connect with the Ethernet as soon as power is applied If there is a valid Ethernet connection the power up sequence is immediate However if there is no connection the monitor will delay about 10 seconds before showing the power up screen Model 612 and 614 Temperature Monitors Factory Default Setup A monitor with factory default settings will have an operational display like the one shown here Model 614 The dash or dot characters indicate that there is no sensor connected Note that in some cases there will be an erratic temperature display when no sensor is connected This is not an error condition The high input impedance of the monitor s input preamplifier causes erratic voltage values when unconnected Input Channel factory defaults are Se
41. yyyy Sets or queries the instrument s date Date is in string format and is surrounded by double quotes Format is mm dd yyyy for month day year SYSTem DISTc 0 5 1 2 4 8 16 32 64 Set or query the display filter time constant The display filter is time constant filter that is applied to all reported or displayed temperature data Available time constants are 0 5 1 2 4 8 16 32 or 64 Seconds SYSTem DRES FULL 1 2 3 Sets or queries the instrument s display resolution Choices are FULL Display temperature with the maximum possible resolution e 1 2 or 3 Display will display the specified number of digits to the right of the decimal point NOTE This command only sets the number of digits displayed on the front panel display It does NOT affect the internal accuracy of the instrument or the format of measurements reported on the remote interfaces The main use for this command is to eliminate the flicker in low order digits when the instrument is used in a noisy environment SYSTem FWREV Queries the instrument s firmware revision level SYSTem HOMe Causes the front panel display to go to the Operate Screen SYSTem HWRev Queries the instrument s hardware revision level SYSTEM NAME name The controller contains a unit name string that may be set or queried using this command This can be used to assign a descriptive name to the instrument SYSTem NVSave Save NV RAM to Flash Thi
42. 0 00 295 00 290 00 285 00 280 00 275 00 270 00 265 00 260 00 255 00 250 00 245 00 240 00 235 00 230 00 225 00 220 00 215 00 210 00 205 00 200 00 195 00 190 00 185 00 180 00 175 00 170 00 165 00 Volts 0 86921 0 87959 0 88988 0 90008 0 91021 0 92022 0 93008 0 93976 0 94927 0 95867 0 96794 0 97710 0 98615 0 99510 1 00393 1 00569 1 00744 1 00918 1 01093 1 01267 1 01439 1 01612 1 01785 1 01957 1 02127 1 02299 1 02471 1 02642 1 02814 1 02985 1 03156 1 03327 1 03498 1 03669 1 03839 1 04010 1 04179 1 04349 1 04518 1 04687 1 04856 1 05024 1 05192 1 05360 1 05528 1 05696 1 05863 1 06029 1 06196 1 06362 1 06528 1 06693 Temp K 160 00 155 00 150 00 145 00 140 00 135 00 130 00 125 00 120 00 115 00 110 00 105 00 100 00 95 00 90 00 89 00 88 00 87 00 86 00 85 00 84 00 83 00 82 00 81 00 80 00 79 00 78 00 77 00 76 00 75 00 74 00 73 00 72 00 71 00 70 00 69 00 68 00 67 00 66 00 65 00 64 00 63 00 62 00 61 00 60 00 59 00 58 00 57 00 56 00 55 00 54 00 53 00 Volts 1 06858 1 07023 1 07188 1 07353 1 07517 1 07681 1 07844 1 08008 1 08171 1 08334 1 08497 1 08659 1 08821 1 08983 1 09145 1 09306 1 09468 1 09629 1 09791 1 09952 10124 10295 10465 10643 10828 10996 11217 11480 11828 12425 13841 16246 18193 19816 1 21325 1 22816 1 24342 1 25932 1 27621 1 29401 1 31277 1 33317 1 35568 1 37998 1 40827 1 44098 1
43. 2 HIENa YES NO Relay High Enable Sets or queries the high temperature enable for the specified relay RELays 1 2 LOENa YES NO Relay Low Enable Sets or queries the low temperature enable for the specified relay RELays 1 2 lt dead band gt Sets or queries the dead band parameter This controls the amount of hysteresis that is applied before a relay is asserted or cleared Parameter lt dead band gt is floating point numeric and is in units of the controlling input channel Sensor Calibration Curve Commands The CALCUR commands are used to transfer sensor calibration curves between the instrument and the host controller Curves are referenced by an index number In the monitor there are eight user curves numbered 1 through 8 The CALCUR data block consists of many lines of ASCII text The format is the same as the file format for user calibration curves which is detailed in the section User Calibration Curve File Format CALCUR lt index gt Sets or queries sensor calibration curve data Uses a fragmented message protocol to sense many lines of ASCII text to the instrument Note It is much easier to use the Utility Software to send and receive sensor calibration curves Sensor commands Sensor commands are used to set and query information about the sensors installed in the controller Both factory and user installed sensors can be queried but only user sensors may be edited NOTE Factory installed sensors
44. 23 289 0 423 77 4 6 8341 0 096 150 90 788 0 409 100 9 1375 0 106 200 CLONI 0 409 150 14 463 0 105 250 30 845 0 393 200 19 641 0 102 300 110 354 0 387 200 34036 ETT 400 148 640 0 383 06 601 AT 500 185 668 0 378 i BATS rere 600 221 535 0 372 aan 39 824 0103 700 256 243 0 366 800 289 789 0 360 900 324 302 0 318 1123 390 47 0 293 96 Cernox 100 85 940 0 552 Cernox temperature sensors do not follow a ie S pula l f 200 54 228 0 184 standard calibration curve Data shown here is for 250 46 664 0124 typical sensors 300 41 420 0 088 The monitor supports Cernox using a 100mV or 350 37 621 0 065 less Constant Voltage AC excitation This extends 400 34 779 0 050 low temperature operation to 100mK Please refer 420 33 839 0 045 to the section titled Selecting a Voltage Bias for NTC Sensors Lakeshore Cernox CX 1010 Lakeshore Cernox CX 1050 Name User Supplied Config ACR 10mV Name User Supplied Config ACR T K Ohms QIK T K Ohms QIK 0 1 21389 558110 1 4 26566 48449 0 2 4401 6 38756 2 11844 11916 0 3 2322 4 10788 3 5733 4 3042 4 0 4 1604 7 4765 9 4 2 3507 2 1120 8 0 5 1248 2 2665 2 6 2252 9 432 14 1 662 43 514 88 10 1313 5 128 58 1 4 518 97 251 77 20 692 81 30 871 2 413 26 124 05 30 482 88 14 373
45. 3 30 1467 06 127 0 74 2743 17 2182 0 29 5186 07 14303 3 20 1479 78 135 0 73 2764 99 2242 0 28 5329 10 15369 3 10 1493 26 143 0 72 2787 41 2304 0 27 5482 79 16562 3 00 1507 58 152 0 71 2810 45 2368 0 26 5648 41 17901 2 90 1522 82 163 0 70 2834 13 2436 0 25 5827 42 19412 2 80 1539 09 174 0 69 2858 49 2507 0 24 6021 54 21126 2 70 1556 48 186 0 68 2883 56 2580 0 23 6232 80 23081 2 60 1575 12 200 0 67 2909 36 2658 0 22 6463 61 25325 2 50 1595 16 216 0 66 2935 94 2738 0 21 6716 86 27920 2 40 1616 77 234 0 65 2963 32 2822 0 20 6996 06 30943 2 30 1640 15 254 0 64 2991 54 2911 0 19 7305 49 34493 2 20 1665 53 277 0 63 3020 65 3003 0 18 7650 42 38706 2 10 1693 20 303 0 62 3050 68 3100 0 17 8037 48 43758 2 00 1723 48 343 0 61 3081 68 3202 0 16 8475 06 49892 1 90 1757 83 355 0 60 3113 70 3309 0 15 8973 98 57444 1 80 1793 33 396 0 59 3146 79 3422 0 14 9548 42 66902 1 70 1832 94 445 0 58 3181 01 3540 0 13 10217 44 78978 1 60 1877 43 503 0 57 3216 41 3665 0 12 11007 22 94764 1 50 1927 75 574 0 56 3253 06 3796 0 11 11954 86 116005 1 40 1985 13 661 0 55 3291 02 3935 0 10 13114 91 145658 1 30 2051 19 769 0 54 3330 37 4082 0 09 14571 49 189096 1 20 2128 07 906 0 53 3371 19 4237 0 08 16462 45 257192 1 10 2218 67 1084 0 52 3413 56 4401 0 07 19034 37 375766 1 00 2327 06 1203 0 51 3457 57 4576 0 06 22792 03 628083 0 99 2339 09 1226 0 50 3503 33 4760 0 05 29072 86 0 98 2351 35 1251 0 49 3550 93 4956
46. 3 EEC Council Directive of 19 February 1973 on the harmonization of the laws of Member States relating to electrical equipment designed for use within certain voltage limits The compliance of the above mentioned product with the Directives and with the following essential requirements is hereby confirmed Emissions Immunity Safety EN 55011 1998 EN 50082 1 1997 EN 61010 1994 A2 May 96 The technical files and other documentation are on file with Mr Guy Covert President and CEO As the manufacturer we declare under our sole responsibility that the above mentioned products comply with the above named directives Guy D Covert July 15 2011 72 Appendix A Installed Sensor Curves Factory Installed Curves The following is a list of factory installed sensors and the corresponding sensor index Bard E No Sensor Used to turn the selected input channel off Crvocon S900 Cryocon S700 series Silicon diode Range 1 4 to 500K 10uA constant y current excitation Lakeshore DT 670 series Silicon diode Curve 11 Range 1 4 to 500K 104 A LS DT 670 are constant current excitation Lakeshore DT 470 series Silicon diode Curve 10 Range 1 4 to 500K 10uA LS DT 470 eee constant current excitation CD 12A Cryo Industries CD 12A Silicon diode Range 1 4 to 500K 10uA constant current excitation SI 410 Diode Scientific Instruments Inc 410 diode Curve Range 1 5 to 450K 10uA excitation 20 Pt100 385 DIN437
47. 3500 lt CalCur gt 0 203800 lt CalCur gt 0 214100 lt CalCur gt 0 224600 lt CalCur gt 0 235100 lt CalCur gt 0 245800 lt CalCur gt 0 256500 lt CalCur gt 0 267300 lt CalCur gt 0 278100 lt CalCur gt 0 289100 lt CalCur gt 0 300100 lt CalCur gt 0 311100 lt CalCur gt 0 322200 lt CalCur gt 0 333400 lt CalCur gt 0 344600 lt CalCur gt 0 355800 lt CalCur gt lt CalCur gt lt SensorCurve gt lt Transactions gt 475 000000 lt CalCur gt 470 000000 lt CalCur gt 465 000000 lt CalCur gt 460 000000 lt CalCur gt 455 000000 lt CalCur gt 450 000000 lt CalCur gt 445 000000 lt CalCur gt 440 000000 lt CalCur gt 435 000000 lt CalCur gt 430 000000 lt CalCur gt 425 000000 lt CalCur gt 420 000000 lt CalCur gt 415 000000 lt CalCur gt 410 000000 lt CalCur gt 405 000000 lt CalCur gt 400 000000 lt CalCur gt 395 000000 lt CalCur gt 390 000000 lt CalCur gt 385 000000 lt CalCur gt 93 Appendix G Sensor Data Tables Silicon Diode Silicon diode sensors offer good sensitivity over a wide temperature range and are reasonably interchangeable Use in magnetic fields is not recommended Silicon diode sensors use a constant current DC excitation of 10A Cryocon S900 Silicon Diode Name Cryocon S900 Configuration Diode
48. 40 Data Logging icon deni a ian ena nan Aaa dE dd da ad a AVENNE 43 44 Stripe Chart td A a ee ele A eed A ne de ee E e 43 111
49. 47740 1 51590 1 55483 1 59108 1 62255 1 64342 ana ow om naa Temp K 52 00 51 00 50 00 49 00 48 00 47 00 46 00 45 00 44 00 43 00 42 00 41 00 40 00 39 00 38 00 37 00 36 00 35 00 34 00 33 00 32 00 31 00 30 00 29 00 28 00 27 00 26 00 25 00 24 00 23 00 22 00 21 00 20 00 19 00 18 00 17 00 16 00 15 00 14 00 13 00 12 00 11 00 10 00 9 00 8 00 7 00 6 00 5 00 4 00 3 00 2 00 1 00 85 Cryocon R500 Ruthenium Oxide Sensor The Cryocon R500 with 10u4A DC excitation Temp K Ohms Ohms K Temp K Ohms Ohms K Temp K Ohms Ohms K 20 00 1100 75 4 0 90 2459 10 1481 0 45 3762 25 5877 15 00 1127 06 7 0 89 2473 91 1514 0 44 3821 02 6149 10 00 1178 49 15 0 88 2489 05 1548 0 43 3882 51 6439 9 00 1195 31 19 0 87 2504 53 1583 0 42 3946 90 6751 8 00 1216 12 24 0 86 2520 36 1621 0 41 4014 41 7086 7 00 1242 56 30 0 85 2536 57 1658 0 40 4085 27 7447 6 00 1277 29 41 0 84 2553 15 1697 0 39 4159 74 7837 5 00 1325 01 58 0 83 2570 12 1738 0 38 4238 11 8259 4 50 1356 30 70 0 82 2587 50 1781 0 37 4320 70 8715 4 00 1394 87 88 0 81 2605 31 1824 0 36 4407 85 9212 3 90 1403 69 93 0 80 2623 55 1869 0 35 4499 97 9753 3 80 1412 95 97 0 79 2642 24 1917 0 34 4597 50 10343 3 70 1422 68 102 0 78 2661 41 1966 0 33 4700 93 10989 3 60 1432 91 108 0 77 2681 07 2016 0 32 4810 82 11699 3 50 1443 68 114 0 76 2701 23 2070 0 31 4927 81 12481 3 40 1455 05 120 0 75 2721 93 2124 0 30 5052 62 13345
50. 500 9215 6 40 3 400 8159 8 69 6 600 13325 41 7 500 15426 75 3 670 16264 42 2 600 23138 78 6 700 17533 42 4 670 28694 80 800 21789 42 6 700 31100 80 4 900 26045 42 4 800 39179 81 1000 30251 41 7 900 47256 80 4 1100 34373 40 7 1000 55247 79 3 1200 38396 39 7 1100 63119 78 1 1270 41153 39 1200 70842 76 3 1300 42318 38 7 1270 76136 75 2 1400 46131 37 5 1500 49813 36 1 1600 53343 34 5 1640 54712 34 100 K uV uV K K uV uVIK 3 2 6257 5 1 03 1 2 5299 6 8 98 4 2 6256 2 1 4 2 5292 10 1 10 6242 9 3 12 3 2 5278 9 11 6 20 6199 2 5 58 4 2 5266 8 12 6 30 6131 3 7 99 10 5181 8 16 40 6040 10 2 20 5014 17 50 5927 7 12 2 30 4846 4 16 6 75 5573 6 16 40 4681 5 16 5 100 5131 2 19 4 50 4515 8 16 7 150 4004 3 25 6 75 4084 6 17 8 200 2575 3 31 4 100 3627 18 8 250 872 57 38 150 2645 2 20 4 273 15 0 39 4 200 1600 1 21 4 300 1067 4 40 8 250 512 81 22 350 3215 5 45 300 597 44 22 4 400 5560 2 48 7 350 1696 3 21 8 500 10735 54 6 400 2805 7 22 7 600 16437 59 2 500 5135 3 23 4 670 20677 61 7 600 7470 7 23 4 Appendix H Rear Panel Connections Rear Panel 38 Cryomagnetics Inc ial 4 Model 612 Temperature Monitor Sena 7 5 24V AC DC 15W Max 204568 Made in USA RS 232 aw LAN POE Inputs A B CE Rly1 Rly2 E a El ES Figure 2 Model 612 Rear Panel
51. 60 standard 1000 Platinum RTD Range 23 to 873K 1mA excitation PHK 385 1000Q at 0 C Platinum RTD using DIN43760 standard calibration curve Range 23 to 1023K 100A excitation 10KQ at 0 C Platinum RTD Temperature coefficient 0 00385 Range 23 to Pt10K 385 naar 873K 10uA excitation 23 RhFe 27 1mA Rhodium Iron 279 at 0 C 1mA DC excitation 1 5 to 873K SI RO 105 Scientific Instruments Inc RO 105 Ruthenium Oxide sensor Temperature range is 2 to 273K Use with the NTC10uA input configuration only SI RO 600 Scientific Instruments Inc RO 600 Ruthenium Oxide sensor with constant voltage AC excitation Temperature range is lt 500mK to 40K bias Cryocon R500 Cryocon R500 Ruthenium Oxide sensor with constant voltage AC excitation y Temperature range is lt 500mK to 40K Crvocon R400 Cryocon R400 Ruthenium Oxide sensor Temperature range is 2 to 273K y Use with the NTC10uA input configuration only L roek Thermocouple Type K Rango 3210 1643K remer Thermocouple Type E Range 32101273K O as Tenure or CrromerAuFe 7 termocouple Range SOIR o noe No Sensor Used to tum he selected input channel ot The SENSor remote commands are used to query and edit sensors installed in the controller For example the command INPUT B SENSor 34 would set input B to use the R400 sensor INPUT A SENSor 1 would set input A to use the S900 diode INPUT A SENSor 0 would turn input A off by setting the sensor to
52. 6957 1 59 77 35 1 14905 1 72 100 0 98322 1 82 150 0 88603 2 00 200 0 78059 2 14 250 0 67023 2 23 300 0 55672 2 28 350 0 44105 2 32 400 0 32319 2 36 450 0 20429 2 38 Lakeshore DT 670 Silicon Diode Name LS DT 670 Configuration Diode T K Volts mV K 1 4 1 64429 12 49 4 2 1 57848 31 59 10 1 38373 26 84 20 1 19775 15 63 30 1 10624 1 96 50 1 07310 1 61 77 35 1 02759 1 73 100 0 98697 1 85 150 0 88911 2 05 200 0 78372 2 16 250 0 67346 2 24 300 0 55964 2 30 350 0 44337 2 34 94 400 0 32584 2 36 450 0 20676 2 39 500 0 09068 2 12 Lakeshore DT 470 Silicon Diode Name LS DT 470 Configuration Diode T K Volts mV K 1 4 1 6981 13 1 4 2 1 6260 33 6 10 1 4201 28 7 20 1 2144 17 6 30 1 1070 2 34 50 1 0705 1 75 77 35 1 0203 1 92 100 0 9755 2 04 150 0 8687 2 19 200 0 7555 2 31 250 0 6384 2 37 300 0 5189 2 4 350 0 3978 2 44 400 0 2746 2 49 450 0 1499 2 46 475 0 0906 2 22 GaAlAs Diode GaAiAs diode sensors offer good sensitivity over a wide range of temperatures However they do not follow a standard calibration curve Useful in magnetic fields below 5T and a temperature above 30K Outside of this range a Ruthenium Oxide sensor offers better performance GaAiAs diode sensors use a constant current DC excitation of 10uA The monitor limits low temperature operation to 25K since
53. 9 1083 90 0 52 3414 4401 00 1 00 2327 1203 00 0 51 3458 4576 00 0 99 2339 1226 00 0 50 3503 4760 00 Sensor Packages The SM and CP Sensor Packages The S900 SM is mounted in a rugged surface mounted package This compact package features a low thermal mass and is easy to install Package material is gold plated OHFC copper on an Alumina substrate Solder limits the temperature range to 400K Leads are 3 inches material is 37 AWG copper with Polyimide insulation Positive connection is Red and negative is Black Sensor is easily installed by attaching the substrate directly to the desired surface using cryogenic varnish Leads should be thermally anchored The CP is an ultra compact CP It features low thermal mass and ue G _ operation to 500K Y Package material is gold plated OHFC copper 0 042 inf ha Leads are 3 inches Material is 37 AWG copper with Polyimide insulation Positive connection is Red and negative is Black This package is extremely small and has a low thermal mass 88 The BB Sensor Package The BB package is an industry standard 0 310 bobbin package that features excellent thermal contact to the internal sensing element This ensures a rapid thermal response and minimizes thermal gradients between the sensing element and the sensor package Mechanical integrity of the sensor assures reliable performance even in severe applications With the bobbin package the lead wires are therm
54. 9 004 This module simply plugs into any sensor input channel to support thermocouple measurements from cryogenic through oven temperatures Up to four modules can be installed on a single instrument and they can easily be added or removed at any time They are powered by the monitor and perform amplification cold junction compensation and connection to copper Internal switches are used to select the cold junction compensation for specific types Open the module and use the switches to select types K E T AuFe 0 7 or off The thermocouple device is connected to the module by using a mini spade connector Refer to the Thermocouple Connections section Offset Calibration Thermocouple devices can vary significantly from their standard curves especially at cryogenic temperatures where their sensitivity is reduced To accommodate these variations the monitor allows an offset calibration for individual thermocouple devices This can be a simple offset or a two point offset and gain calibration Note that device calibrations to not affect the instrument s basic calibration ChA Radiation Shield Thermocouple 78 12K Set Reading 0 00K Return to ChA cfg Device calibration is performed by using the instrument s Input Configuration menu An example is shown here Alternatively calibration may be performed by using remote commands For cryogenic applications an offset calibration is usually done at a low temperature reference point Examp
55. CPI to identify various standard events and error conditions It is queried using the Common Command ESR This register is often used to generate an interrupt packet or service request when various l O errors occur Bits in the ESR are defined as follows ESR Bit7 Bite Bits Bit4 Bit3 Bit2 Biti Bito OPC QE DE EE CE PWR Where Bit7 OPC Indicates Operation Complete Bit5 QE Indicates a Query Error This bit is set when a syntax error has occurred on a remote query It is often used for debugging Bit4 DE Indicates a Device Error Bit3 EE Indicates an Execution Error This bit is set when a valid command was received but could not be executed An example is attempting to edit a factory supplied calibration table Bit2 CE Indicates a Command Error This bit is set when a syntax error was detected in a remote command Bit0 PWR Indicates power is on 58 The Standard Event Enable Register The Standard Event Enable Register ESE is defined by the SCPI as a mask register for the ESR defined above It is set and queried using the Common Command ESE Bits in this register map to the bits of the ESR The logical AND of the ESR and ESE registers sets the Standard Event register in the Status Byte STB The Status Byte The Status Byte STB is defined by the SCPI and is used to collect individual status bits from the ESE and the ISR as well as to identif
56. RT lt port number gt Set or query the e mail port Parameter is integer and default is 25 MAIL A H STATE ON OFF Set or query the input channel e mail send enables If a channel is enabled e mail will be sent when an alarm condition is asserted on the selected input channel 69 Data Logging Commands DLOG STATe ON OFF Turns the data logging function ON or OFF Equivalent to Start STOP DLOG INTerval lt Seconds gt Sets the data logging time interval in seconds DLOG COUNt Queries the number of entries in the log buffer DLOG DLOG READ Reads the entire contents of the log buffer Each record is sent on a single line Format is lt gt MM DD YYYY HR MN SC ChA CHB ChC ChD where lt gt is the record number MM DD YYYY is the date in Month Day Year format HR MN SC is the time in Hour Minute Second format Lines end with a lt CR gt lt LF gt sequence End of transmission is indicated by a line that only contains a semi colon DLOG RESEt Sets the logging record number to zero DLOG CLEAr Clears the data logging buffer 70 Code snippet in C The following code opens a Cryomagnetics instrument at address 192 168 1 4 on the Local Area Network It is written in Microsoft Visual C and uses the eZNET LAN library provided on the the Utility CD Il Example Ethernet LAN program using C TCPIP declarations include TCPIPdrv h TCPIPdrv LAN
57. ad resistance 4 Thermocouples These sensors will often have DC offset errors Use the CalGen feature to generate a new sensor calibration curve that corrects for these errors No temperature reading Review the Error Displays section above 81 Remote l O problems Symptom Condition Can t talk to RS 232 interface Possible causes 1 Ensure that the RS 232 port is selected Press the System key and scroll down to the RIO Port field 2 Ensure that the baud rate of the controller matches that of the host computer To check the controller s baud rate press the System key and scroll down to the RIO RS232 field 3 Ensure that the host computer settings are 8 bits No parity one stop bit 4 The RS 232 port does not have an effective hardware handshake method Therefore terminator characters must be used on all strings sent to the controller Review the RS 232 Configuration section 5 Ensure that you are using a Null Modem type cable There are many variations of RS 232 cables and only the Null Modem cable will work with Cryomagnetics controllers This cable is detailed in the RS 232 Connections section Debugging tip Utility Software can be used to talk to the controller over the RS 232 port using the terminal mode All command and response strings are displayed This is a good way to establish a connection Intermittent lockup on RS 232 interface Possible causes 1 Lon
58. ally anchored to the sensor mounting This is essential for accurate sensor readings Bobbin Material Sensor Bonding Leads Gold plated Oxygen free hard Copper Individual serial number Stycast epoxy 1 1g excluding leads V Clear 36 inches 36AWG Phosphor Bronze Four V Green lead color coded cryogenic ribbon cable l Black Insulation is heavy Formva L Red 4 40 machine screw Table 15 BB Package Specifications Table 16 Cable Color Code 400K Maximum Connections to the BB package are made using a color coded four wire 36 AWG cryogenic ribbon cable Wires may be separated by dipping in Isopropyl Alcohol and then wiping clean Insulation is Formvar and is difficult to strip Techniques include use of a mechanical stripper scrapping with a razor blade and passing the wire quickly over a low flame The BB package is easily mounted with a 4 40 brass screw A brass screw is recommended because thermal stress will be reduced at cryogenic temperature The mounting surface should be clean A rinse with Isopropyl Alcohol is recommended 20 310 a oe First apply a small amount of Apiezon N grease to the Ll threads of the screw and on the mounting surface of the sensor package S015 a Next place the bobbin on the mounting surface insert EJ 0 185 I screw through bobbin and lightly tighten 89 The Canister Sensor Package C
59. ance by the Buyer Buyer supplied products or interfacing unauthorized modification or misuse operation outside of the environmental specifications for the product or improper site preparation or maintenance The design and implementation of any circuit on this product is the sole responsibility of the Buyer Cryomagnetics does not warrant the Buyer s circuitry or malfunctions of this product that result from the Buyer s circuitry In addition Cryomagnetics does not warrant any damage that occurs as a result of the Buyer s circuit or any defects that result from Buyer supplied products Notice The information contained in this document is subject to change without notice Cryomagnetics makes no warranty of any kind with regard to this material including but not limited to the implied warranties of merchantability and fitness for a particular purpose Cryomagnetics shall not be liable for errors contained herein or for incidental or consequential damages in connection with the furnishing performance or use of this material No part of this document may be photocopied reproduced electronically transferred or translated to another language without prior written consent Trademark Acknowledgement Cryomagnetics are registered trademarks of Cryomagnetics Inc All other product and company names are trademarks or trade names of their respective companies Safety The monitor does not contain any user serviceable parts Do
60. and its connections Requiring these sensors to be floating and providing a low impedance path to ground is the most effective way to eliminate noise pickup from this antenna effect To ensure that the instrument s grounding scheme is working effectively 1 Make sure that the sensors are floating 2 Make sure that the input cable shields are connected to the connector s metal backshell 3 Since the Monitor s enclosure is floating ensure that the cryostat end of the sensor cable shields are also connected to the cryostat 36 Model 612 and 614 Temperature Monitors Utility Software APC compatible utility software package is provided with all instruments This is available on CD or on the Internet Utility software can be used to control and configure the instrument via the LAN interface It runs under all versions of the Windows operating system This software provides several useful functions including 1 2 Real time strip charts of temperature Data Logging This function allows the user to record data from the instrument at a specified sample rate The resulting file is compatible with most spreadsheet and data analysis software Download or upload sensor calibration curves The software will accept curves in Cryomagnetics CRV Lakeshore 340 or Scientific Instrument s txt format In fact it will read almost any table of temperature vs sensor units CalGen function is implemented This function allows the u
61. ars should activate 38 Model 612 and 614 Temperature Monitors Using the Interactive Terminal The Utility Software s Interactive Terminal mode allows the user to send commands to the instrument and view the response Terminal mode is selected by selecting Comm gt Interact from the main menu or Interact from the shortcut bar This will result in the display shown below To interact with the instrument type a remote command into the dialog box and click Send The command will be transmitted to the instrument and a response if any will be displayed on the background window To exit terminal mode click the Quit button on the dialog box Bal CMI Utility Software dloader Emm 2 Comm Operations Data Logging View Help User Options Changed to LAN port Short Cuts query IDN response Cryomagnetics 612 204566 2 11E Sensor Curve Download W Serial Terminal Enter Command Interact CalGen Data Logging Upload Internal DataLog Connect Comm Type LAN Status Connected Cryomagnetics 612 Ver 39 Downloading or Uploading a Sensor Calibration Curve Sensor calibration curves may be transferred between the PC and the instrument by using the Calibration Table menu To download a curve send it from the PC to the instrument either select Sensor Curve Download from the shortcut bar or Operations gt Sensor Curve gt Download from the main menu This will cause a file selec
62. as eae all Ane aati ieee eh ae eed vain ele ea 36 Ace aaa 7 Alarms A E o ewes aeaa EEEa aaea eee eae dee ea EE e eaa EAE A EAE E EAR EN A 26 A PA 25 hysteresis A A ee ee E A A a a eed 26 latched A NN 11 26 LENA a o ad eee ct ral na le deal dl Peer 10 AA O O O 25 SAM ii A a ed 25 VISUAL ca A A delito 14 CAGA dadas Nei 12 19 Configuration SEPSA ae 91 Command tagiga sian lil e dd lina eee 91 Cond aaa 91 Complex tags a ncaa Tee no ee ee er ae el ee el ees 92 EXxXaimple ys vec tees GMA ee Ge eg ease A ee A AG lade ee ET i aed A RS 93 FIOatreSPONSC MAG 2 exces ares tia OO eee 92 Group tags Model tag Pause tag Query tag Response tag O eens 2 91 Data LOGGING util a A A a alate a in ee eile da idas 31 ereiaro PA a A n E A ed Ae E a E E EE 70 COUNT AAA AN a ia 70 A A NN 70 A E A A TN 70 Reading A A o ae e dedo Soa de MASA 70 OEE yah O A RR EENE 70 Display FESOIULION 000 IA A A AAA AAA A 27 NO 26 SS A NO 26 ENCISO adidas OE T 21 CU QUE A A A A andar aes 83 dimensions iii A A A AA A A A E AA ad eee eh 21 ENVIO Metal a odie a A ee ea eS 21 Pa el Mou aduana ai ii E A a E EA EE 83 Sale GON COT MME ere Ne tc Stance he E sage ieee aa Nae teeta re a teeta dette c or DE AN 21 AS O OA stant 21 Ethernet 10 100 BaSe Ty id O A A A bis 106 configuration connection Factory Defaults uc A aa 51 52 GalO Way ia tt Ai A A AA AA A A al tans 52 A O ee Ve ee 51 Vj AEETI eae le oe
63. ate new calibration curves for Silicon diode or resistor sensors This provides a method for obtaining higher accuracy temperature measurements without expensive sensor calibrations Most Cryocon temperature controllers support CalGen directly on the instrument However the utility software package implements the same algorithm and can be used with virtually any instrument capable of measuring temperature Curves can be generated from any user selected sensor calibration curve and are written to a specified internal user curve location For diode sensors the user may specify one two or three data points CalGen will generate the new curve based on fitting the input curve to the user specified points Platinum or other resistor calibration curves require one or two data points The generated curve will be a best fit of the input curve to the two specified input points Since CalGen fits a sensor calibration curve to measured data any errors in the instrument s measurement electronics are also effectively canceled CalGen Initial Setup To start the CalGen process either select CalGen from the shortcut bar or select Operations gt CalGen from the main menu This initiates the process of generating a new sensor curve Using CalGen with Diode Sensors Options for generating diode calibration curves are 1 One point near 300K The portion of a diode Sensor curve above 30K is fit to a user specified point near 300K This is a two point fit wh
64. ation of a diode requires two steps 1 Calibration of the input voltage reading and 2 Calibration of the 10uA current source Note that the voltage calibration must always be done first since the current source calibration requires a precision voltage reading Diode Voltage Calibration To calibrate the diode voltage range click on the SI Diode V tab and follow the sequence described above to send Gain and Offset values to the instrument The upper target requires connection of a 1 9 Volt source The actual value is between 1 0 Volts and 2 4 Volts If you do not have a precision voltage source you can use a 1 5 Volt battery by using a high precision volt meter to measure its actual voltage The lower target requires connection of a 0 5 Volt source The actual value is between zero Volts and 0 6 49 Volts If you do not have a precision voltage source you can short the input channel for Zero volts Constant current Source Calibration Calibration of the constant current source is performed by using the SI Diode I tab On this screen only an upper target value is required since the current source only requires a gain term The upper target requires connection of a 100KQ resistor The actual value should be within 10 of 100KQ Calibration of DC resistors Resistor sensors that use direct current excitation are calibrated by using the 1mA DC 100uA DC and 10uA DC tabs Resistors required for calibration are as follows a 1mA DC
65. ay on the instrument s front panel for 20 seconds and then an alert box will show on the PC Types of errors are 1 Failure to erase flash memory 2 Write error and 3 Verify error If the error persists after several programming attempts there is a hardware problem and you will need to contact Cryomagnetics 80 Appendix C Troubleshooting Guide Error Displays Display Condition Or an erratic display of temperature Input channel voltage measurement is out of range Ensure that the sensor is connected and properly wired Ensure that the polarity of the sensor connections is correct Refer to the Sensor Connections section Many sensors can be checked with a standard Ohmmeter For resistor sensors ensure that the resistance is correct by measuring across both the Sense and Excitation contacts For a diode sensor measure the forward and reverse resistance to ensure a diode type function Input channel is within range but measurement is outside the limits of the selected sensor s calibration curve Check sensor connections as described above Ensure that the proper sensor has been selected Refer to the Input Channel Setup Menus section Change the sensor units to Volts or Ohms and ensure that the resulting measurement is within the selected calibration curve Temperature Measurement Errors Symptom Condition Noise on temperature measurements Possible causes 1
66. be selected This is the curve that will be rotated and shifted to fit the selected points 46 Model 612 and 614 Temperature Monitors When the curve has been selected the following dialog box will appear The process requires the user to completely fill out this dialog box by selecting a temperature and then Enter three reference points i x Enter a reference point close to 4 2K Temperature fo Voltage fo Enter a reference point close to 77K Temperature fo Voltage o Enter a reference point close to 300K Temperature o Voltage fo Cancel Wapor Pressure copying the voltage or resistance reading corresponding to that temperature from the instrument Note that the Vapor Pressure button takes the user to a convenient calculator that computes the temperature of various cryogens from the current barometric pressure Once the dialog box has been completed click OK to proceed To finish the process a prompt will require the user to save the modified calibration curve to a file 47 Instrument Calibration Calibration of the monitor requires the use of various voltage and resistance standards in order to generate calibration factors for the many measurement ranges available Calibration is Closed Case There are no internal mechanical adjustments required The monitor cannot be calibrated from the front panel Calibration data is stored in the instrument s non volatile memory and
67. by going to the Network Configuration Menu UDP Configuration UDP is a simple connection less protocol that can be used to communicate with the instrument The user binds a UDP socket and communicates with the instrument in a fashion similar to the older RS 232 style communications Before you can bind a UDP socket you will need to know the instrument s IP address and port number Both the IP and port number may be obtained from the front panel of the instrument or by using the discovery function of the Utility Software UDP uses a port that is the TCP port address plus one The factory default is 5001 TCP IP Data Socket Configuration TCP IP is a connection orientated protocol that is more complex and has higher overhead than UDP The user must bind a TCP IP socket and negotiate a connection before communicating with an instrument 51 Before you can bind a TCP IP socket you will need to know the instrument s IP address and port number Both may be obtained from the front panel of the instrument or by using the discovery function of the Utility Software The default TCP IP port address is 5000 This can be changed from the front panel by going to the Network Configuration Menu The monitor will handle up to five TCP IP connections simultaneously Connections will be automatically closed after 5 minutes of inactivity Checking the TCP IP connection with Hyperterminal Hyperterminal or any other TCP IP communications program can b
68. c tons a AA eas vas AAA A 107 RS 2232 CONNOR 107 INDEX egestas shaped ee aso oa a do e 108 Index of Tables Table 1 Model Identification ccccccceceeeeececceceeeeeseeeenaeeeeeeeeeesesaneeeeeeees 3 Table 2 Monitor Instrument ACCeSSOTIIeS ccceceeeeeeeeceeeeeeeeeeeteennaeees 7 Table 3 Cryogenic ACCESSOTCIES ooooococonnccccnnnocaccnnnnnconcncnnnn rca r nro narran rca 7 Table 4 Function Key Descriptions ooooocnnninoncnnnncocccnnnconnnnncncannnr rana ncnnnnno no 9 Table 5 Temperature Wnts scrin enie eanas aa eaaa 10 Table 6 Input ConhguratONS eerren Enae EaR AESA RA 13 Table 7 PTC Resistor Sensor Configuration cecseeeeseeeeeeesteeeeenaes 17 Table 8 monitor Root Menu cccceceeeeeeeeneeceeeeeeeeseseeeeeeeeeeeseesnnaeees 24 Table 9 Input Channel Setup Menus cccccceeeeeeeceeceeeeeteeeesaeaeeeeees 25 Table 10 System Functions Menu ceeececeeeeeeeeeeeeeeeeseeeeeeeseeaeeeeeeaeees 26 Table 11 Data logging Setup Menu ncccccinnccccnnnocccccnnnoncconnnon cnc nn nro cn nnnn nn 27 Table 12 Recommended Sensor Configuration Data 33 Table 13 GPIB Host Setup ParameterS ooooooccccnncnccccocononcccncncnnannnnonncnnnnnnnns 52 Table 14 Commonly Used Remote Commands ooccoccccnncoccccnononcninnnnn naci n 57 Table 15 BB Package SpecificatiONS o nocccnnnniinnnnnnccnnnnnccccnnnarccnnnrrcnnnn 89 Table 16 Cable Color Code ooooocococccccccccccocononcncc
69. d by using an optional external module Measurement Drift 25ppm C Input Range 70mV Accuracy 1 0yu V 0 05 Resolution 0 0003 Installed Types K E T and Chromel AuFe 0 07 Input Connector Isothermal Screw type terminals 13 NTC Resistor Sensors Constant Voltage AC measurement Type Constant Voltage AC resistance bridge with excitations down to 10mV RMS Excitation Current 2 5mA to 2 5yA continuously variable Two ranges of 2 5mA and 250WA full scale Excitation Frequency 1 67Hz bipolar square wave Accuracy reading range Reading gt 4Q and lt 30KQ 0 05 0 05 Reading gt 0 04Q and lt 1 0MQ 0 15 0 15 Drift gt 100 25ppm C lt 100 35ppm C Resistance Reading Range 0 to 100KQ Data Logging Data logging of input channel data is performed into an internal 40K byte circular buffer and is time stamped with a real time clock Buffer memory is non volatile and will retain valid data indefinitely without AC power The monitor will log a maximum of 1 000 entries where each entry contains eight temperature readings Status Outputs Visual Alarms Independent visual alarms can be configured for each input They are displayed on the front panel as text characters and an LED indicator Status reported via Remote Interface Input channel alarms Relay Outputs Number 2 Type Dry contact Contact ratings 10A 125 VAC 5A 250VAC or 5A 30VDC Function Asserted or cleared based on te
70. e easily used to test the TCP IP connection Run the program and configure it with the IP default 192 168 1 4 and TCP IP port Default 5000 and it should be possible to type in basic commands For example IDN should return Cryomagnetics Model 612 204683 1 01A When working with the TCP IP interface it is often convenient to go to the Network Configuration Menu The bottom two lines of this screen show the last line received and sent by the instrument Web site configuration The monitor factory default settings are as follows IP address 192 168 1 4 Subnet Mask 255 255 255 0 Gateway 192 168 0 1 TCP Data Socket 5000 UDP Data Socket 5001 DHCP OFF These settings are also entered into the monitor when the LAN Reset sequence is executed from the front panel The instrument s embedded web site may be opened in any web browser by typing http 192 168 1 4 into the address bar and the monitor s Home Page should appear Alternatively if the network system has a DNS server use the instrument s name instead of the IP address The default name is M24Cxxxx where xxxx is the last four digits of the instrument s serial number From the monitor s web page configure the instrument to meet the network requirements IEEE 488 GPIB Option Configuration The only configuration parameter for the optional GPIB interface is to set the address This is done by using the System Functions Menu described above Once the external GPIB i
71. e format of an entry is lt sensor reading gt lt Temperature gt Where lt sensor reading gt is a floating point sensor reading and lt Temperature gt is a floating point temperature in Kelvin Numbers are separated by one or more white spaces Floating point numbers may be entered with many significant digits They will be converted to 32 bit floating point which supports about six significant digits The last entry of a table is indicated by a semicolon character with no characters on the line NOTE All curves must have a minimum of two entries and a maximum of 200 entries Entries may be sent to the instrument in any order The instrument will sort the curve in ascending order of sensor reading before it is copied to Flash RAM Entries containing invalid numeric fields are deleted before the curve is stored 76 The following is an example of a calibration curve transmitted to the instrument via the LAN interface Good Diode Diode 1 0 volts 0 34295 300 1205 0 32042 273 1512 0 35832 315 0000 1 20000 3 150231 1 05150 8 162345 0 53234 460 1436 In summary 1 The first line is a name string that can be up to 15 characters Longer strings are truncated by the instrument The second line identifies the instrument s input configuration and must be one of the allowed selections described in the Supported Sensor Configurations section 2 3 4 The third line is the multiplier field and
72. e from the same material as the cryostat wires Therefore there is no significant thermocouple formed by this connection In a four wire measurement scheme only connections in the voltage sense lines can cause measurement errors So the sense wires should have adjacent contacts in a multi pin connector in order to minimize any temperature difference between them Caution Any disconnected inputs to the monitor should be configured to a sensor type of None This will turn the input off and prevent the high impedance preamplifiers from drifting into a latch up state Recommended color codes for a sensor cable are as follows Color Code White Green Red Black Signal Excitation Excitation Sense Sense Table 19 Sensor Cable Color Codes The cable used is Belden 8723 This is a dual twisted pair cable with individual shields and a drain wire The shields and drain wire are connected to the connector s metal backshell in order to complete the shielding connection A four wire connection is recommended in order to eliminate errors due to lead resistance Cryogenic 104 applications often use fine wires made from specialty metals that have low heat conduction This results in high electrical resistance and therefore large measurement errors if the four wire scheme is not used Four wire connection to diode and resistive type sensors is diagrammed below
73. e wait 0 MOON 1007 3 750000 3 500000 3 250000 3 000000 2 750000 2 500000 2 250000 2 000000 1 750000 1 500000 To upload a calibration curve use the same procedure and select Upload This will transfer a curve from the instrument to the PC 42 Model 612 and 614 Temperature Monitors Using the Real Time Strip Charts The real time strip chart feature of the Utility Software lets the user continuously display any combination of input channels on the computer display This function is initiated by selecting the View command on the Utility Software s main toolbar then selecting the desired channels to monitor A strip chart will be displayed for each channel selected The dialog box will show the channel s Input Identifier Name String and a chart of current temperature The update rate of the chart is locked to the program s Data Logging Interval The section below details how to set this value 43 Data Logging The Utility Software will perform data logging on all of the instruments input and control output channels The result is a disk file in Comma Separated Value or CSV format This format is compatible with any data analysis or charting software including Microsoft Excel To initiate data logging select the Data Logging button from the Utility Software s main menu The Data Logging Setup dialog box will now appear On this dialog box check the desired channels and set an Interval value in
74. e will take about 15 seconds to complete During that time the instrument will not be accessible over any remote interface The RST command sets the monitor to it s last power up default setting SRE The SRE command sets the Status Byte Enable SRE Register bits The SRE Register contains a bit mask for the bits to be enabled in the Status Byte STB Register A one in the SRE register will enable the corresponding bit in the STB register A zero will disable the bit The SRE Query returns the current contents of the SRE register STB The STB query returns the contents of the Status Byte Register 62 System Commands System commands are a group of commands associated with the overall status and configuration of the instrument rather than a specific internal subsystem SYSTem ADRes lt address gt Sets and queries the address that the IEEE 488 2 GPIB remote interface will use The address is a numeric value between 1 and 31 with a factory default of 12 The addresses assigned to instruments must be unique on each GPIB bus structure This command has no effect on other interfaces SYSTem AMBient Queries the internal reference junction temperature Value reported as a decimal number in units of Celius SYSTem BAUD 9600 19200 38400 57200 Sets or queries the RS 232 Baud rate SYSTem BEEP lt seconds gt Asserts the audible alarm for a specified number of seconds Command only no query SYSTem DATe mm dd
75. ed primarily for ultra low temperature operation Features include interchangeability and 30 1565 3 AIMA operation in high magnetic fields 77 35 836 52 15 398 100 581 14 8 213 The monitor will support the R500 down to about 150 328 75 3 057 2 0K Please refer to the section titled Selecting a 200 220 93 1 506 Voltage Bias for NTC Sensors 250 163 73 0 863 Cryocon R500 Ruthenium Oxide 300 129 39 0 545 Name Cryocon R500 Config ACR 350 106 98 0 368 T K Ohms QIK 400 91 463 0 261 0 05 29072 628083 420 86 550 0 231 0 1 13114 145658 0 2 6996 30943 0 3 5053 13345 0 5 3503 4760 1 2327 1203 1 4 1985 660 6 2 1723 343 5 3 1508 152 4 4 2 1378 80 4 6 1277 40 9 10 1178 15 4 20 1101 4 08 30 1053 4 0 40 1009 3 5 98 Cryocon R400 The R400 Ruthenium Oxide temperature sensor is designed for operation between 2 0K and 273K with high sensitivity below 40K They feature interchangeability and operation in high magnetic fields Applications include low temperature superconducting magnet systems and liquid helium systems Using the NTC10uA input configuration will operate with the R400 over it s full temperature range Scientific Instruments RO 600 Cryocon R400 Ruthenium Oxide Name Cryocon R400 Config NTC10uA T K Ohms QIK 2 239556 17787 3 221769 13961 4 207807 11343 6 187171
76. eeeececeeeeseceseneeceeeeaeceseeecaeesaaeseaeecaeesaeeeaeeseaeseseeeeeecaeeseaeeeaeeeeseeseeetseeaes 61 DEAD band i456 os ae shea ttl td e o loa ed tera Wis vcs tres tds rt LL SIS MLS 61 specifications iii And 20 Remote Commands Data LO aa 70 Retuming Equipment cti A Ce aa ad Pa ee ne dto Lao 6 RS 232 COMNfiguration LATA Sete ae ee AAA AAA A ke ee 53 GCOMMOCTION PA NRS N EAEAN EEA EEE EN AE Ee AE A A A SEER 107 Specifications n mo ea a A nes Bl fd ele ees in ie le ee ee 20 700 COlOG COGS O awa susast ANA EEA A EN ES 89 MOUNTING Seve ce ese A A sae a eee neva E a a E aa 89 SCPI AUN ets in seen O ales Sig ala ig aia aa O alata ei aa oN Ie 62 ESE a 59 62 ES A dit 58 59 62 Instrument Status Enable a Lidia 58 Instrument Status Register iia ii ataca 58 SE A A A A A O oe 59 SR AA A AA ee ee A ee eee ea 58 59 OPE COMO A A AA 62 RST COMMANG A O A RON 62 Standard Event Regist ici A 58 Standard Event Status Enable co t0iicoi a A A a A at td 6 62 SA A ial 9 NRO 58 59 sensor COMMOCTION dde 19 COnnections 00 A A a es A A A A ee ian E 36 Sensor A E o Sada tpinc E Sa doen KETE E NEEE EE 10 SN A ai NA 26 PA de ae LI e ll a Ls 26 A A A A AN ENE 10 25 26 Sensor Calibration CU A ad 68 CRV TIIE ain a n ae ned nt aa a Astle bide n aaan tdenthueadts 32 33 MM revere cea Ris Ab a a darias 68 LO a a 77 109 Supported Sensors 20a eit Saget A de ld el ee a ne oni Se ee 12 Technical ASS dC A Se E oat 5 Tem
77. efore use Software will attempt to parse any text file If the file contains columns of Other txt sensor readings vs temperature the entries will be properly parsed and the curve can be used or converted to a crv file after the header dialog box is filled out In order to download a file run the utility software and select Sensor Curve Download The user will be prompted to select a file Once the software has read the file the header information dialog box will appear x Sensor Name R400 RuOx 12345 Sensor Type ACR Multiplier 1 Unit LogOhms y Number of Pts 104 Abort Display Curve M Save as cry file 32 Model 612 and 614 Temperature Monitors The Sensor Name can be any string up to 15 characters that helps identify the sensor The Sensor Type Multiplier and Unit fields affect how the instrument is configured so they must be correctly set or unexpected results will be obtained Sensor Type Multiplier Units Example ACR 1 0 LogOhms CX1030E1 crv Ruthenium Oxide ACR 1 0 LogOhms LSRX102 crv Thermistors ACR 1 0 LogOhms LSRX102 crv Rhodium lron 270 PTC100 1 0 Ohms rhfe27 crv Germanium ACR 1 0 LogOhms LSRX102 crv Carbon Glass ACR 1 0 LogOhms LSRX102 crv Silicon diode Diode 1 0 Volts s900diode crv Carbon Ceramic ACR 1 0 LogOhms LSRX102 crv Platinum 100Q PTC100 1 0 Ohms PT100385 crv Platinum 1KQ PTC1K 1 0 Ohms PT1K385 crv GaAlAs diode Diode 1 0 Vo
78. em Setup Menu 6 Datalogging Setup e Configure internal data logging 7 Relay1 Setup e Configure Relay 1 8 Relay2 Setup e Configure Relay 2 9 iNet Config e Go to the Network Configuration Menu 10 Time Date Setup e _ Setup the instruments time and date Table 8 Monitor Root Menu Input Channel Setup Menu The Input Channel Setup menus are used to configure the four Model 614 or two Model 612 input channels They are accessed from the root menu The first character on each line of these menus is always the input channel identifier which is a superscripted A B C or D Model 614 or A B Model 612 Scrolling to a line using the A or Y keys and then pressing the Enter e key will cause the cursor to change from a block cursor to the data entry cursor type that corresponds to the type of data that may be entered in this field 24 Model 612 and 614 Temperature Monitors ChA ChB ChC ChD Setup Menu Indicates currently selected input channel 1 ChA Channel A ment selected pur cha Select to scroll through all inputs Input channel units Temperature is displayed in real time on the left and is in the selected units Selections 2 77 123 K are K C F or S Here S selects sensor units Volts or Ohms j Sensor type selection Allows selection of any user or 3 Sen Pt100 385 factory installed sensor Selects bridge range For NTC sensors select
79. end of their range Therefore the reduced measurement accuracy does not degrade temperature measurement accuracy Q The low current settings are required since sensor self heating at low temperature is a very significant source of errors For more information please refer to the section titled Selecting a Voltage Bias for NTC Sensors Calibration tables for NTC sensors may be entered either directly in Ohms or in base 10 Log of Ohms to accommodate the generally logarithmic nature of their calibration curves 18 Model 612 and 614 Temperature Monitors Gallium Arsenide Diode Sensors Gallium Arsenide diodes or 6 Volt diodes are sometimes used in systems where magnetic fields are present Use is limited to operation above about 30K with fields of less than 5T The monitor supports these sensors down to 25K If your requirements are for lower temperature operation Ruthenium Oxide is a better choice Gallium Arsenide sensors do not fit standard calibration curves therefore the user must provide a sensor specific curve before using this type of sensor CalGen Calibration Curve Generator The CalGen feature generates new calibration curves for Silicon diode thermocouple or Platinum sensors This provides a method for obtaining higher accuracy temperature measurements without expensive sensor calibrations Curves can be generated from any user selected curve and are written to a specified internal user calibration curve area Ca
80. ere the 30K point is taken from the existing calibration curve The portion of the curve below 30K is unaffected 2 Two points 300K and 77K These two user specified points are taken to fit the diode curve region above 30K The entire curve is offset to match the 77K point then the gt 30K region is fit to the two points 3 Three points 300K 77K and 4 2K Two points above 30K are fit as in the selection above Then a third point is used to fit a single point in the high sensitivity region below 20K 4 One point near 4 2K This is a two point fit where the 20K point is taken from the existing calibration curve The portion of the curve above 20K is unaffected Using CalGen with Resistor Sensors The calibration curve generation procedure for Platinum or other resistor sensors is the same as for the diode However these sensor curves are generated using two user specified points Therefore the selection of the number of points is not required Example CalGen Procedure A complete procedure for calibrating a diode sensor at three points is shown here Before the procedure can be started the instrument must be connected and have a valid sensor connected The CalGen procedure requires the user to stabalize the input temperature at three user selected points It will capture data at each of these points and then generate a new curve from that data When a 3 point CalGen is started for a Silicon diode sensor the reference curve must first
81. es NOT make a reference since Ethernet is isolated 4 Ground reference the negative side of an external power supply The supplied external power supply or a Power Over Ethernet supply CANNOT be ground referenced 35 IMPORTANT The monitor requires that an Earth Ground reference connection is made at the rear panel Failure to provide this connection will result in erratic measurements and can even damage input circuits The sensor cables provided connect their shields to the monitor s chassis Therefore the required Earth Ground can be made by connecting the shield wire at the opposite end to a ground reference point This is usually done by connecting it to the back shell of the cryostat connector The Single Point Ground The internal Single Point Ground is the voltage reference point for the instrument s grounding scheme All circuits are designed so that no current will normally flow through the connections to this ground Therefore it provides a good quality low impedance path to ground for any undesired currents that are coupled into the equipment Sensor Connection For best performance all sensors connected to the instrument should be electrically isolated floating from any other grounds Sensors used in cryogenic thermometry are often high impedance For example a Silicon Diode temperature sensor will have about 160K ohms of impedance at 5K Because of this a very efficient antenna can develop around the sensor
82. f the module This can often be corrected by running a copper connection from a point near the sensor ground and the chassis ground of the controller Defective building wiring or insufficient grounding is usually the root cause General recommendations to minimize AC pickup include 1 Minimize the length of the thermocouple wires Connect the module as near as possible to the sensor so that thermocouple wires are converted to copper as soon as possible 2 Twist the wires 3 Avoid running sensor wires near or parallel to AC power lines Shielding and Grounding Issues Grounding Power supplied to the instrument by an external supply or via Power Over Ethernet does not generally provide an earth ground reference In order to minimize noise coupling into the instrument and customer s equipment connection to an earth ground reference should be established by some other means Common methods include 1 Connecting the sensor cable shield to the instrument s chassis on one end and to the cryostat ground on the other Generally these connections are made using the backshell on the respective connectors 2 Connection of a ground wire from the instrument s rear panel to a ground reference This is often the cryostat ground Note The enclosure except for rear panel is anodized and cannot make electrical connection 3 Connection of an RS 232 cable will reference the instrument to your computer s earth ground Connection of a LAN cable do
83. g cables Try using a lower baud rate In some cases inserting a 50mS delay between commands will help 2 Noise pickup Try using shielded cables with the shield connected to a metal backshell at both ends 3 Don t send reset RST commands to the controller before reading Can t talk to the LAN interface Possible causes 1 A Category 5 crossover patch cable is being used where a Category 5 patch cable should be used or visa versa 2 The TCP settings between the monitor and the PC are incompatible Review the network configuration section 3 PC Client software not configured to use TCP Data Socket 5000 Debugging tip Utility Software can be used to talk to the monitor over the LAN Data Socket port using the terminal mode All command and response strings are displayed Since the software provides the proper interface setup it is a good way to establish initial connection 82 Appendix D Enclosure Options Panel Mounting Panel Cutout Shown here is a cut out drawing for panel mounting of the monitor 134 87 Panel Mount Kit The monitor mounts to panel by sliding the enclosure through a panel cut out hole and then installing the panel mount kit Cryomagnetics part number 4012 020 Drawings and assembly of the panel mount kit are shown here e 166 ee toy DN SK 125 3 04 RAD ant 500 2 PLACES 500 83 Appendix E Sensor Data Cry
84. hannel Characteristics There are four Model 614 or two Model 612 independent multi purpose input channels each of which can separately be configured for use with any supported sensor The sensor type is selected by the user and this establishes the input configuration Values of excitation current voltage gain etc will be determined by the microprocessor and used to automatically configure the channel There are no jumpers or optional cards required to configure the various sensors Input Configurations Acomplete list of the input configurations supported by the monitor is shown below Sensor Type pe R Bias Type Excitation Current Diode 1 75V Cl 104A DC ACR 8Q to 1 0MQ CV 1 0mA to 0 1pA AC PTC100 0 5 4000 Cl 1 0mA DC PTC1K 5 4 0KQ Cl 100uA DC NTC10UA 240KQ Cl 10uA DC TC70 70mV None 0 None 0 None 0 Table 6 Input Configurations Bias types are CI Constant Current through the sensor CV Constant Voltage drop across the sensor O Note A complete listing of factory installed sensors and their characteristics can be found in Appendix A O Note Any disconnected inputs to the monitor should be set to type None This will turn the input off Silicon Diode Sensors Silicon Diode sensors 2 Volt diodes are configured with a 10 A current source excitation and a 2 2Volt input voltage range PTC Resistor Sensor RTDs The monitor supports all types of Pos
85. his tag must always follow a Query tag otherwise it is ignored When the comparison fails an error text message will display The returned value passes the test if within 2 5 of the expected value lt Query gt input a ALAR High lt Query gt lt FloatResponse gt 200 000000 lt FloatResponse gt Pause lt Pause gt lt Pause gt Provide a pause for a specified number of milliseconds to allow the instrument to react to a command Maximum 20 seconds Generally this is only used with the RS 232 serial interface where there is no hardware handshake lt Pause gt 1000 lt Pause gt lt Delay 1 second gt Group Tags Any tag that is not defined is treated as a group tag They are used to provide structure and enhance readability Otherwise they are ignored Complex Tags Sending a user sensor calibration curve or a PID table to an instrument requires a complex tag because it can require many lines of data User Sensor Calibration Curve lt Calcur gt Send a sensor calibration curve to the instrument lt Download User curve 4 gt lt CalCur gt Calcur 4 lt CalCur gt lt Curve Name gt lt CalCur gt My Sensor lt CalCur gt lt Curve Type gt lt CalCur gt Diode lt CalCur gt lt Multiplier gt lt CalCur gt 1 000000 lt CalCur gt lt Units gt lt CalCur gt Volts lt CalCur gt lt Curve Entries gt lt CalCur gt 0 163300 475 000000 lt CalCur gt lt CalCur gt 0 173300 470 000000 lt CalCur gt
86. ic string such as 123 45 Compound queries are commonly used to save programming steps For example the query LOOP 1 SETPt PGAin IGAin DGAin reports the loop 1 setpoint P gain I gain and D gain An example response is 123 45 20 0 60 12 5 Note that the response is also separated by semicolons The representation of the decimal symbol for floating point numbers must be a period instead of comma as is customary used in some European countries Command Terminators Commands must be terminated by an ASCII line feed n character SCPI Common Commands The IEEE 488 2 SCPI standard defines a set of common commands that perform basic functions like reset self test and status reporting Note that they are called common commands because they must be common to all SCPI compliant instruments not because they are commonly used Common commands always begin with an asterisk are four to five characters in length and may include one or more parameters Examples are IDN CLS OPC SCPI Parameter Types The SCPI language defines several different data formats to be used in program messages and response messages Numeric Parameters Commands that require numeric parameters will accept all commonly used decimal representations of numbers including optional signs decimal points and scientific notation Enumeration Parameters These are used to set values that have a limited number of choices Query responses will always
87. inum RTD 100Q at 0 C Temperature coefficient 0 003902 Q C Range 73K to 833K PT1K375 crv Platinum RTD 1000Q at 0 C Temperature coefficient 0 00375 Q C Range 73K to 833K Chromel AuFe 7 thermocouple Range 3 to 610K TCTypeE crv Thermocouple Type E Range 3 2 to 1273K TCTypeK crv Thermocouple Type K Range 3 2 to 1643K TCTypeT crv Thermocouple Type T Range 3 2 to 673K CX1030E1 crv Cernox CX1030 example curve Range 4 to 325K 75 User Calibration Curve File Format Sensor calibration curves may be sent to any Cryomagnetics instrument using a properly formatted text file This file has the extension crv It consists of a header block lines of curve data and is terminated by a single semicolon character The header consists of four lines as follows Sensor Name Sensor name string Sensor Type Enumeration Multiplier Signed numeric Units Units of calibration curve OHMS VOLTS LOGOHM The Sensor Name string can be up to 15 characters and is used to identify the individual sensor curve When downloaded to a Cryomagnetics instrument this name appears in the sensor selection menu of the embedded web server and will appear on all sensor selection fields on the front panel The Sensor Type Enumeration identifies the required input configuration of the input channel For the monitor selections are DIODE PTC100 PTC1K NTC10uA and ACR These configurations are described in the section titled Suppo
88. ions are 5 A Bri dge Auto 1 0mA 100uA 10uA and Auto All other sensors use Auto 6 Hi gh Alarm 200 000 Set point for the High Temperature alarm 7 Hi gh Enable No a temperature alarm enable Selections are Yes or 8 Low Alarm 200 000 Set point for the Low Temperature alarm 9 Low Alarm Ena Yes oe temperature alarm enable Selections are Yes or 10 A Deadband 0 250 Alarm deadband 11 A Latched Enable No Setects latched vs non latched alarms A Information only Maximum value attained since 12 A Max 00K statistics reset E s Information only Maximum value attained since 13 A Min DOK statistics reset 14 A Accum 0 0000 Min oo only Time accumulated since statistics P Information only Standard Deviation value attained 15 A S2 0 0000 since statistics reset A Information only Slope of best fit straight line Value 16 A M 0 000K Min attained since statistics reset i Information only Offset of best fit straight line Value 17 A b 0 000K attained since statistics reset 18 le A Reset Statistics Reset Statistics Table 9 Input Channel Setup Menus 25 Temperature Units The Units field line 1 assigns the units that are used to display temperature for the input channel Selections are K for Kelvin C for Celsius F for Fahrenheit and S for sensor units Note that if the S option is selected the actual sensor units will be displayed when the field is deselected Sensor units are V for Volts
89. istor sensors require the selection of a Bias Voltage and Bridge Range 29 Using NTC Sensors Negative Temperature Coefficient NTC resistors are often used as low temperature thermometers especially at ultra low temperature Their resistance and sensitivity increase dramatically at low temperature but their sensitivity is often relatively poor at warmer temperatures The monitor supports these sensors by using a constant voltage AC resistance measurement e Measurement accuracy and temperature range are improved at low temperature because sensor self heating errors are reduced or eliminated e Measurement accuracy is improved at warmer temperatures because the constant voltage circuit increases excitation power in that region e The control stability is improved in the warm region since higher excitation power reduces measurement noise e DC offsets in the resistance bridge can cause additional power dissipation at low excitation levels The monitor holds offsets to a maximum of one half of the minimum excitation current by use of an offset cancellation feedback loop Error Sources in NTC Sensor Measurements At warm temperatures the major source of error with NTC sensors is the measurement electronics itself In a well designed instrument accuracy is limited to a level established by the measurement s signal to noise ratio where the signal is the power dissipated in the sensor and noise is the collection of all noise so
90. itive Temperature Coefficient PTC resistive sensors using a constant current AC resistance measurement technique Standard calibration curves are provided for DIN43760 and IEC751 Platinum sensors These curves have been extended down to 14K Below that the sensors can be used with user supplied calibration curves A table of recommended setups for various types of PTC resistor sensors is shown here Type Measurement Range Sensor Excitation Platinum 1009 625Q 0 012 1 0mA AC Platinum 1000Q 6 25KQ 0 12 100A AC Rhodium lron 6 25Q 0 012 1 0mA AC Table 7 PTC Resistor Sensor Configuration 17 NTC Resistor Sensors gt 100KQ Ruthenium Oxide sensors used in superconducting magnet systems commonly have a room temperature resistance of gt 100KQ The monitor supports these devices using 10uA DC constant current excitation The maximum resistance is 220KQ DC excitation is used since the high resistance values do not benefit from AC excitation In addition 10A constant current is implemented because the extremely small current used by constant voltage modes would lead to measurement noise Sensor self heating caused by the high level excitation is calibrated out in the sensor s calibration curve Since this self heating is reproducible high measurement accuracy is maintained Examples of high resistance sensors include the Cryocon R400 and the Scientific Instruments RO 105 NTC Resistor Sensors The mo
91. l An alarm must be enabled before it can be asserted INPut A H ALARm LOENa YES NO Sets or queries the low temperature alarm enable for the specified input channel An alarm must be enabled before it can be asserted INPut A H ALARm LTENa YES NO Sets or queries the latched alarm enable mode When an alarm is latched it can be cleared by using the CLEar command INPut A H ALARm CLEar Clears any latched alarm on the selected input channel INPut A H ALARm AUDio YES NO Sets or queries the audio alarm enable When enabled an audio alarm will sound whenever an alarm condition is asserted INPut A H MINimum Queries the minimum temperature that has occurred on an input channel since the STATS RESET command was issued INPut A H MAXimum Queries the maximum temperature that has occurred on an input channel since the STATS RESET command was issued INPut A H VARiance Queries the temperature variance that has occurred on an input channel since the STATS RESET command was issued Variance is calculated as the Standard Deviation squared INPut A H SLOpe Queries the input channel statistics SLOPE is the slope of the best fit straight line passing through all temperature samples that have been collected since the STATS RESET command 65 was issued SLOPE is in units of the input channel display per Minute 66 INPut A H OFFSet Queries the inpu
92. lGen is implemented in the Utility Software Input Channel Statistics Input temperature statistics are continuously maintained on each input channel This data may be viewed in real time on the Input Channel menu or accessed via any of the remote I O ports Statistics are Minimum Temperature Maximum Temperature Temperature Variance Slope and Offset of the best fit straight line to temperature history Accumulation Time The temperature history may be cleared using a reset command provided Electrical Isolation and Input Protection The input channel measurement circuitry is not isolated from other internal circuits The common mode voltage between an input sensor connection and the instrument s ground should not exceed 40V Sensor inputs and outputs are provided with protection circuits The differential voltage between sensor inputs should not exceed 15V Thermal EMF and AC Bias Issues DC offsets build up in cryogenic temperature measurement systems due to thermocouple effects within the sensor wiring though careful wiring minimizes these effects However in a few systems measurement errors induced by thermal EMFs result in unacceptable measurement errors These cases require the use of an AC bias or chopped sensor excitation in order to remove DC offsets Sensor Wiring Diode and Platinum RTD type sensors use a DC measurement scheme Therefore the only effective method of minimizing thermocouple DC offsets is to wire tem
93. latinum RD di A ade oo dee a UAM a MIA 7 Plain UNTRTD gt gt a a iD td EEE 12 PlatintimiRT Dis ii A A A td LL II A 16 PTIOK ii td Rs 73 PTIK ees anana O NN 73 R400 oe bios 7 73 A NN 7 Rhodium Iron 12 17 73 RO 600 73 RTD aid 713 Ruthenium Oxide 18 Ruthenium Oxide 7 12 33 73 76 95 98 99 LR 33 S900 E a le a hae eet e e ale Ue e gt lade di 7 94 self heating A ON 18 SAO A A A A a a LAS aE a Wed 73 silico MAA RR AO 94 Silicon Diderot raTa 7 12 17 36 48 49 103 TEME cessive sissies euccrsdaavaiaceecuacavsuveanecsscvacesduusayacuncuatesdaveaiesduedaciaduvuaceaindedacwedartapuduacuaduudunddvaadeadaveayiedavaediduasagreniedat 104 SPNGRMISIONS A AA A AAA antes denen ee dae 18 thEFMOCOUDPIE ieee ea eles eee ee eae N 12 19 34 35 67 73 75 100 105 WINO es SR eae IN ee cole ee A aA Ete onlay ated dt ante OM ae Ot Sates eect a MON 104 APO a o a delo ale e el ze tic sett JA S 7 RP NE E EE A E NEO Deco Dios cee suede au a TNS 7 Time constant filter Re seeding cdta Ad eia 11 time constant filter aia A A a A E A a da 11 63 64 Unit NN O 63 69 110 USB Option COMNPIQUIATION Zi A aiid eed ei a Aca ae eee ate 53 Utility Software GAO MORIA ges cesses tect chatter ad od cala nao erre lor ados e 37 XE Utility Software GalGen CalGen mito ri es 46 CAGE a A ALS A Ad A a 46 Calibration Curve ota ia tl een 42 RV a A a ia 40 ERVIN a bt 37 CUIVO 340 0 td iaa a Lada ok ie hs ee leila Saro i E AR
94. lect the displayed channel menu The second line is an enumeration It shows the temperature reading in real time and allows the selection of temperature units Pressing the Enter e key will cause the cursor to flash Then pressing the Right gt key will sequence through the allowed choices of K C F or S To make a selection press the Enter e key again The sixth line is a numeric entry To change the value displayed press the Enter e key and the cursor will flash Then press the INC A key to increment the number or the DEC W key to decrement the number When the desired value is shown press the Enter e key LED indicators There are three LED indicators below the display They indicate the following Alarm Red An enabled alarm condition is asserted Relay 1 Green and Relay 2 Green Relay asserted The Input Channel Temperature Displays Temperature displays are a seven character field and is affected by the Display Resolution setting in the system menu This setting will be 1 2 3 or Full Settings of 1 2 or 3 indicate the number of digits to the right of the decimal point to display Kelvin whereas the Full setting causes the display to be left justified in order to Celsius display the maximum number of significant digits possible Fahrenheit Ohms Volts millivolts If the sensor type is None the Input Channel has been disabled and a blank line is shown Temperature units are selec
95. les being liquid nitrogen or even liquid helium The result of the calibration is that the controller will read the correct temperature when the sensor is held at that reference Since thermocouples lose sensitivity at low temperature an offset calibration in that range will generally have little effect on the higher temperature accuracy An offset calibration is done as follows 1 Connect the monitor as usual for thermocouple measurements This procedure is done with the thermocouple cold junction compensation ON For best accuracy be sure that ambient temperature doesn t vary significantly 2 Allow the instrument to warm up for at least Y hour without moving or handling the sensor 3 From the instrument front panel first set a thermocouple sensor and then go to the input configuration menu 4 Establish the thermocouple device at a precisely known temperature When stable enter the desired reading in the Set Reading field and press Enter For example if the sensor is immersed in liquid nitrogen enter a value of 77 35K 5 The input temperature reading should snap to the value entered Note that the Set Reading temperature is always in units of Kelvin Grounded vs Floating Thermocouples Electrically floating devices are always recommended because they provide generally lower noise operation and cannot facilitate ground loop conditions However the thermocouple module inputs are 34 Model 612 and 614 Temperature Monitors
96. lts a Table 12 Recommended Sensor Configuration Data Note that NTC resistor data is generally in units of LogOhms However it can also be in units of Ohms Be sure to check the curve data for reasonableness Note One simple way to generate a sensor calibration curve is to open a similar sensor file with a text editor and paste in your own data The example files in the above table are for that purpose They are located in the monitor sub directory of the Utility Software package At this point it is a good idea to view a graph of the curve data x 40 000 3 021 Sensor Curve 27 720 4 217 nd OuputiLogOhm a 26 20 Temperature Ki The above graph is for a Ruthenium Oxide sensor with units of LogOhms It shows the typical highly non linear curve for that type sensor If the curve data was in units of Ohms it would be so extremely non linear that significant errors might result Proceed with downloading the curve to the instrument 33 Using Thermocouple Sensors Thermocouple sensors have low sensitivity at cryogenic temperatures and are very susceptible to electrical noise In order to obtain the best possible measurement accuracy the recommendations given here should be carefully applied Installing the Thermocouple Module All thermocouple sensors require the use of an optional Cryomagnetics external thermocouple module 403
97. m LOWest lt setpt gt INPut A H ALARm HIENa YES NO INPut A H ALARm LOENa YES NO INPut A H ALARm Clear INPut A H ALARm LTEna YES NO INPut A H ALARm AUDio YES NO INPut A H MINimum INPut A H MAXimum INPut A H FVARiance INPut A H SLOpe INPut A H OFFSet INPut A H STAts TIMe INPut A H STAts RESet INPut A H TCOFfset INPut A H TCGAin CALcur SENSor lt index gt NAMe name string SENSor lt index gt NENTry SENSor lt index gt UNITs VOLTS OHMS LOGOHM SENSor lt index gt TYPe DIODE ACR PTC100 PTC1K NTC10UA SENSor lt index gt MULTiply lt multiplier gt 60 DLOG RUN OFF ON DLOG TIMe lt Seconds gt DLOG COUNt DLOG READ DLOG RESET DLOG CLEAR RELays 1 2 RELays 1 2 SOURce A B C D RELays 1 2 MODe auto control on off RELays 1 2 HIGHest lt setpt gt RELays 1 2 LOWEST lt setpt gt RELays 1 2 lt deadband gt RELays 1 2 HIENa YES NO RELays 1 2 LOENa YES NO NETWork IPADdress NETWork MACaddress NETWork NAME name NETWork DHCP ON OFF MAIL A MAIL A MAIL A H DEST to e mail address H ADDR IPA H FROM from e mail address MAIL A MAIL A H
98. ment has firmware revision 3 00 and hardware revision D The name of the hex file is used to identify the firmware update update For example M18C_301 hex specifies that this is revision 3 01 for a monitor with hardware revision C Note The flash loader software does NOT check the hex file for compatibility with the target instrument Please be sure that you are using the correct file Connecting a PC to the instrument It is recommended that the instrument is connected directly to a PC using a LAN Crossover cable The standard LAN patch cable is designed to connect a PC to a hub and will not work when used to connect to an instrument The Crossover cable has the transmit and receive lines reversed which allows direct 78 connection to an instrument These cables should be clearly marked with the word Crossover From the PC open the network connections dialog select the network adapter that you are using with the Cryomagnetics instrument and select Internet Protocol TCP IP In the TCP IP dialog box select Use the following IP addresses and enter the following IP address 192 168 1 10 Subnet mask 255 255 255 0 Other fields are not used Click OK This should allow you to communicate with the instrument The advanced user can configure the Ethernet connection in any convenient way The above procedure is given because it is known to work The instrument will keep the assigned IP through the en
99. ment powers up with the home status display This is a status only display and the contents is user selectable The Model 614 s factory default display is shown here It shows all eight channels plus alarm indicators Here the characters indicate no alarm The monitor has nine different Home Status displays that can be viewed and selected by pressing the Right gt key Sample Holder Several displays show temperature information in a large easy to read 1 2 3 4 5 6 K font Also shown is the input channel name This name is a convenience that allows easy association of the input channel with its B Rad Shield actual connection Channel names may be entered by use of the embedded web site or via any of the remote interfaces 2 3 4 n 5 6 Y K 23 Instrument Setup Menus The root of the instrument s setup menus is accessed by pressing the Enter e key from the Home Status display The Root Menu The Root Menu displays the list of sub menus that are used to configure the instrument Press the Enter e key to descend into the sub menu or the Right gt key to return to the Home Status display Selections in the root menu are as follows Model 614 shown Root Menu 1 ChA Setup e Press Enter to setup input channel A 2 ChB Setup e Setup input channel B 3 ChC Setup e Setup input channel C 4 ChD Setup e Setup input channel D 5 System Setup e Goto the Syst
100. mperature setpoint data Deadband User defined Connector 4 pin detachable terminal block Remote Interfaces Remote interfaces are electrically isolated to prevent ground loops Ethernet Industry standard 10 BaseT Electrically isolated RS 232 Serial port is an RS 232 standard null modem Rates are 9600 19 200 38 400 and 57 200 Baud IEEE 488 GPIB External option Full IEEE 488 2 compliant USB 2 0 External option Serial port emulator Language Remote interface language is IEEE 488 2 SCPI compliant Further it is identical within the entire Cryomagnetics instrument line Compatibility National Instruments LabView drivers available for all interfaces Ethernet API available for C and Basic Firmware Internal firmware and all data tables are maintained in FLASH type memory Model 612 and 614 Temperature Monitors General Ambient Temperature 25 C 5 C for specified accuracy Mechanical 5 75 W x 2 875 H x 8 75 D Weight 3 Lbs Enclosure Aluminum Extrusion Machined Aluminum front and rear panels Power Requirement Input voltage is 7 5 to 48V AC or DC 10VA 1 External transformer Provided Input 100 240VAC 50 60Hz 2 IEEE 802 3at Power Over Ethernet requires powered hub or injector 15 Performance Summary Measurement Accuracy Diode Sensors The formulas for computing measurement accuracy while using diode sensors are MAV 60 10 510 X SenRdg MAT MAV SenSen Whe
101. much easier to enter numbers from the embedded web page or from a remote interface Key Description 1 From Home screen go to the top level setup menu 2 Within a setup menu Enter data or e F a Enter select a field cursor display will indicate function 3 Press and hold this key for two seconds to toggle AC power A 1 Scroll Display UP 2 When in a field selection INC mode abort entry and return to scroll mode 3 In a numeric field increment 1 Scroll Display DOWN 2 When in a field v DEC selection mode abort entry and return to scroll mode 3 In a numeric field decrement gt 1 Move up the menu tree one level eventually S returning to the Home Status display 2 In Right 4 selection mode scroll to next selection Table 4 Function Key Descriptions Example Menu Shown here is an example input channel setup menu with all of ChA Sample Holder the cursor characters displayed 123 456 K f 20 Pt100 385 Pressing the INC A or DEC keys will move the cursor BiasVoltage N A Additional lines will be displayed after the last line shown Bridge Auto The first line is the channel indicator and channel name pressing Hi Alarm 100 00 the Enter e key will cause the cursor to flash then each time Hi Alarm Ena No an INC A or DEC VW key is pressed the next sequential input Lo Alarm 10 000 channel will be shown Finally pressing the Enter e key again will se
102. n detachable terminal block provided a Function 1 Relay 1 N O 2 Relay 1 Common 3 Relay 2 N O 4 Relay 2 Common Table 21 Relay Connections Terminal block contacts are rated at 10 0A Relay contact ratings are 10A 125 VAC 5A 250VAC or 5A 30VDC Ethernet LAN Connection The 10 100 BaseT Ethernet network RJ 45 system is used by the monitor for Ethernet network connectivity The 10 100 Mbps twisted pair Ethernet system operates over two pairs of wires One pair is used for receiving data signals and the other pair is used for transmitting data signals This means that four pins of the eight pin connector are used ETHERNET Name 7 Figure 5 LAN RJ 45 Pinout 10 100 BaseT Straight Through Patch Cable When connecting the monitor to a hub or switch a standard Category 5 patch cable is used This connects the instrument s transmit lines to the hub s receive lines etc 10 100 BaseT Crossover Cable When connecting the monitor directly to the computer the transmit data pins of the computer should be wired to the receive data pins of the monitor and vice a verse The 10 100 BaseT crossover cable should be used for this purpose A crossover cable is usually a different color than the straight through patch cable Power Over Ethernet Connection The instrument may be powered by an IEEE 802 3at Power Over Ethernet compatible powered hub or power injector When connected to the RJ 45 input
103. nce this reference is often established by connecting the sensor cable shield to the instrument s chassis on one end and to the cryostat ground on the other Generally these connections are made using the backshell on the connectors 103 Input Channel Color Code Color codes for the Dual Sensor Cable part number 4034 038 are as follows Current Current Sense ChB White Current ChB ChB Green Red Sense Current Sense ChB Black Sense Table 18 Dual Sensor Cable Color Codes The cable used is Belden 8723 This is a dual twisted pair cable with individual shields and a drain wire The shields and drain wire are connected to the DB9 connector s metal backshell in order to complete the shielding connection Sensor Wiring DC offsets can build up in cryogenic temperature measurement systems due to thermocouple effects within the sensor wiring They are commonly referred to as Thermal EMFs Careful wiring can minimize these effects The most effective method of minimizing thermocouple DC offsets is to wire temperature sensors so that connections between dissimilar metals are grouped together For example the connection between sensor leads and cryostat wiring should be kept close together This way the thermocouple junctions formed by the connection will have equal but opposite voltages and will cancel each other Frequently sensor leads are mad
104. nitor supports almost all types of Negative Temperature Coefficient NTC resistive sensors by using a constant voltage AC resistance bridge technique these sensors can be used down to very low temperatures Examples of NTC resistor sensors include Ruthenium Oxide Cernox Carbon Glass Germanium and other thermistors Constant voltage excitation is necessary since the resistance thermometers used below about 10K exhibit a negative temperature coefficient Therefore a constant voltage measurement reduces the power dissipation in the sensor as temperature decreases By maintaining low power levels sensor self heating errors that occur at very low temperatures are minimized In the constant voltage mode sensor excitation is a 1 67Hz bipolar square wave This provides DC offset cancellation without loss of signal energy DC offsets are held to lt 0 2uA in order to minimize it s contribution to sensor self heating For more information on using the monitor with NTC resistor sensors please refer to the section titled Selecting a Voltage Bias for NTC Sensors Power dissipation in the sensor is computed by V2 bias P ms Sensor When used with high resistances measurement accuracy steadily degrades due to the extremely low excitation current required The trade off in measurement accuracy vs sensor excitation current is taken for two reasons a The sensitivity of NTC resistor sensors is extremely high in the low temperature
105. nnccnnnnnnnononncnnnn nana mnncnnnnnnnns 89 Table 17 Sensor Input Connector PiNOUt oooooocccccncciccconoccnccnncnocnnononcnnnnnnons 103 Table 18 Dual Sensor Cable Color COdES oooooocccccccccocococoncconccocnnononccnnnnnnns 104 Table 19 Sensor Cable Color Codes ooocooocccoccccccccccccocononcnncnnncnonannonccnnnnnnn 104 Table 20 Thermocouple Polarities ooooooonnocicnnnnnnninnococcccncccononnnononcnnnnnnnns 105 Table 21 Relay CONNECHIONS ooooococcnnnncccnnnocccnnnnoncccnnnnnrn cnn nrrn cnn nora 106 Table 22 RS 232 DB 9 Connector PidOUt oooooocccccnccccnconononccnnccnnnnnnoncnnnnnnons 107 Index of Figures Figure 1 Model 612 Front Panel ooonccconnocccccnnociccnononcnnnonnancnn nano ncnc nano nc cnn 8 Figure 2 Model 612 Rear Panel cncccccnnocccccnnoccccconconcncnanancnncnnoncnr nana nn 101 Figure 3 Input Connector sz ormara EEA nano cnn c nano E rca 103 Figure 4 Diode and Resistor Sensor Connections oooonoocccccnnoccccconanccncnnnns 105 Figure 5 LAN RIAS PINOUT niiair treina catal 106 Figure 6 RS 232 Null Modem Cable 0 eccceceeeeeeeeeeneeeeeeeeneeeeeenneeeeeaes 107 vi Introduction Input Options The Model 612 has two input channels and the 614 has four All inputs are identical and independent with each capable of supporting the same wide range of sensor types Other than the input channel count there are no differences between the Model 612 and 614 Easy to use The monitor s front panel consists of a
106. nnected devices TCP operates even if packets are delayed duplicated lost delivered out of order or delivered with corrupted or truncated data UDP The User Datagram Protocol implemented on the monitor is similar to TCP but is connectionless Since a connection does not need to be negotiated or maintained UDP has a much lower overhead than TCP IP In the monitor a TCP IP port is available for communication using an ASCII command language This is how the instrument interfaces some data acquisition software packages including LabView Where the user is implementing custom software UDP is recommended because of it s lower overhead Ethernet Configuration Each device on an Ethernet Local Area Network must have a unique IP Address This is similar to IEEE 488 systems where each device required a unique GPIB address Further the address assigned to the monitor must be within the range of the computers you want it to communicate with The range is determined by the Subnet Mask To connect to a LAN switch or hub use a standard Category 5 patch cable To connect directly to a PC use a Category 5 crossover type patch cable The monitor is shipped with a default IP address of 192 168 1 4 and Subnet Mask of 255 255 255 0 Using these settings the instrument communicates with any computer or device that has an IP addresses in the range of 192 168 1 0 through 192 168 1 255 The user can configure the monitor to use any other IP address
107. not open the enclosure Do not install substitute parts or perform any unauthorized modification to the product For service or repair return the product to Cryomagnetics or an authorized service center Table of Contents RN 1 Preparing the Monitor for Us A Asians E E ha ee Aad es a aes 3 Model TAGE G AON sn ty sass A a 3 Supplied CIS acca Geek A A a totic A ie aca EEA 3 Apply Power tothe Monitorsc 5 lt r sees esata de E o 3 Factory Defa lt UL do a a e 5 Technical Assistantes A A steer es S A aTe riea iee aeaiia 5 RGU AIS Equip ta dd ate 6 Options Arid ACCESOS AAA gialdgiaine 7 A Quick Start Guide to the User Interface cnsccissticiees cts ye hts ki es 8 E 8 O O a Pa Sah i Ne aa eta ae Sete 11 Restoring Factory Detaults 1 AA Ane nme be 11 Clearing a latched a ad 11 Re seeding the display time constant filter eee cceceseceeeceeeeeeseecseceseeeeeeeeseecsaecneeseeeenaeees 11 Specifications Features and PF Uterine 2 35 A da ia aid 11 Specification SUMMAT nai a n Sestak A boas Meera aha euk A T r 11 DA A 14 Stats OUPUS dia 14 Visual Ada ii dias 14 Status reported via Remote Interface ui A A AA A A ee A Ane 14 PERS o a a dd a Sed Sas 14 Remote Interfaces coe Geass de cera e cata ate E a esac hace tata a E cnet Gt 14 A a Te Ore a ere eee E 14 RS DIR A inksute ean o 14 TIEEE 488 GPIB External option Full IEEE 488 2 compliant 0oooococinccnocccicocinoncnnnoconocannnonnnon 14 USB 2 0 External option Serial port emulato
108. nsor Units Kelvin Sensor Type Pt100 385 DIN standard 1000 Platinum RTD Alarm Enables Off To change these press the Enter e key then refer to the Input Channel Setup Menu section Instrument setup factory defaults are Display Filter Time Constant 4 0 Seconds Display Resolution 3 digits Data Logging Off To change these press the Enter e key and then select the System Setup Menu Network settings are IP Address 192 168 1 4 Subnet Address 255 255 255 0 NOTE Factory defaults may be restored at any time by use of the following sequence 1 Turn power to the monitor OFF by pressing the Enter e key for about two seconds 2 Press and hold the Right key while turning power back ON The monitor will display the message Set Factory Defaults Then press the DEC W key to restore defaults or the INC A key to continue without resetting Technical Assistance Trouble shooting guides and user s manuals are available on our web page at http www cryomagnetics com downloads php Technical assistance may be also be obtained by contacting Cryomagnetics as follows Cryomagnetics Inc 1006 Alvin Weinberg Drive Oak Ridge TN 37830 USA e mail service cryomagnetics com Telephone 865 482 9551 Fax 865 483 1253 For updates to LabVIEW drivers Utility Software and product documentation go to our web site at http www cryomagnetics com downloads php Returning Equipment If an inst
109. nt panel is discussed here However the process is much easier to perform by using the embedded web page Acomplete list of sensors installed at the factory is shown in Appendix A To configure the instrument for one of these sensors proceed as follows 28 Model 612 and 614 Temperature Monitors 1 Install the sensor on a selected input Installation is described in the section titled Sensor Connections in Appendix H Navigate the front panel to the Input Channel Setup menu for the selected channel The second line of this menu will show the current temperature in real time and allow you to select the desired display units Use the navigation keys to go down to the Sen field scroll through the options and select the desired sensor Select None to disable the input channel At the end of the factory installed sensors eight user installed selections will be shown The default name for these are User Sensor N However this name can be changed to give a better indication of the sensor type that is connected For most sensor types installation is now complete The exceptions are NTC resistor sensors that use constant voltage AC excitation With these types of sensors scroll down to the Bias Voltage field and select the desired constant voltage excitation level Then select the bridge range Default range is Auto for auto ranged But some applications perform better if the actual range is fixed Note Only NTC res
110. nter the firmware update mode and will not function normally again until the entire firmware update process is complete without error Be sure you have the correct hex file before proceeding Click the Set Flash Mode button to set the instrument into the flash programming mode The instrument will reset and start in the flash load mode This is indicated by the display shown Since the instrument was reset click Connect again to re establish contact This activates the Program Verify button The instrument will now display Connected Boot loader 1 05 Hold DEC key to abort Click the Program Verify button to start the firmware download The last few lines of the instrument s display will indicate the status First the flash memories are erased and then individual records are programmed and verified There are about 6800 records in a typical file and the programming process takes about ten minutes When programming is complete the unit will automatically reset and begin running the updated firmware Factory defaults are also restored It is possible to power the instrument OFF during the programming process This will require a re start of the entire process after powering ON again Once the download progress starts the instrument powers up in the boot loader mode and will not run the normal instrument firmware until the entire download process is completed without error If an error occurs an error message will displ
111. nterface is connected to the controller s LAN port configuration is performed by the instrument Note that each device on the GPIB interface must have a unique address Set the instrument s address to any value between 1 and 31 The address is set to 12 when the unit is shipped from the factory The GPIB interface does not use a termination character or EOS Rather it uses the EOI hardware handshake method to signal the end of a line Therefore the host must be configured to talk to the instrument using EOI and no EOS Primary Address 1 31 Secondary Address None Timeout 2S Terminate Read on EOS NO Set EOI with EOS on Writes YES EOS byte N A Table 13 GPIB Host Setup Parameters 52 RS 232 Configuration The user can select RS 232 Baud Rates between 300 and 38 400 The factory default is 9600 The Baud Rate is changeable from the instrument s front panel by using the System Functions Menu Other RS 232 communications parameters are fixed in the instrument They are set as follows Parity None Bits 8 Stop Bits 1 Mode Half Duplex The RS 232 interface uses a New Line or Line Feed character as a line termination In the C programming language this character is n or hexadecimal OxA All strings sent to the instrument must be terminated by this character The controller will always return the r n character sequence at the end of each line Note Some serial port software drivers allow
112. o set many of the instrument s parameters including display resolution I O port settings etc It is selected from the Root Menu System Functions Menu Sets the display time constant in 1 Di spl yTC i 2S seconds Selections range from 0 5S to 16S P Sets the resolution Selections are 1 2 2 DisplyRS 3 3 or Full 3 FW Version 1 16E a Only Firmware revision 4 RS232 9600 RS 232 serial port baud rate i GPIB address Valid only if attached to 5 GPIB Adrs 12E an external GPIB option Table 10 System Functions Menu Display Time Constant The first line of the System Functions Menu is Display TC or Display Time Constant This is an enumeration field that sets the time constant used for all temperature displays Choices are 0 5 1 2 4 8 16 32 and 64 Seconds The time constant selected is applied to all channels and is used to smooth data in noisy environments 26 Model 612 and 614 Temperature Monitors Display Resolution The Display Resolution line Display RS is used to set the temperature resolution of the front panel display Settings of 1 2 or 3 will fix the number of digits to the right of the decimal point to the specified value A setting of FULL will left justify the display in order to show the maximum resolution possible The Data logging Setup Menu The Data logging Menu is used to setup internal data logging Data accumulated into an internal buffer that may be read out b
113. ocon 700 Silicon Diode The Cryocon S700 Silicon diode sensor with a 101A excitation current Volts Temp K Volts Temp K Volts Temp K 1 Os 1033 475 0000 41 0 6393 260 0000 81 2510 8 0000 2 0 1733 470 0000 42 0 6586 250 0000 82 32120 7 0000 3 0 1834 465 0000 43 0 6807 240 0000 83 12950 6 0000 4 0 1935 460 0000 44 0 7040 230 0000 84 3280 5 0000 5 0 2038 455 0000 45 0 1238 220 0000 85 3650 4 0000 6 0 2141 450 0000 46 0 7461 210 0000 86 4150 3 0000 7 0 2246 445 0000 47 0 7682 200 0000 87 4700 2 0000 8 0 2351 440 0000 48 0 7916 90 0000 88 3270 1 0000 9 0 2458 435 0000 49 018133 80 0000 89 s590 0 0000 0 0 2565 430 0000 50 0 8338 70 0000 90 5990 9 5000 1 0 2673 425 0000 Dal 0 8547 60 0000 91 6230 9 0000 2 0 278 420 0000 52 0 8753 50 0000 92 6540 8 5000 3 0 289 415 0000 53 0 8977 40 0000 93 6670 8 0000 4 0 300 410 0000 54 0 9198 30 0000 94 6840 7 5000 9 0 311 405 0000 55 0 9373 20 0000 95 7080 7 0000 6 0 3222 400 0000 56 0 9542 10 0000 96 s 7310 6 5000 7 0 3334 395 0000 57 0 9768 00 0000 97 7500 6 0000 8 0 3446 390 0000 58 0 9865 95 0000 98 7690 5 5000 9 0 3558 385 0000 59 0 9950 90 0000 99 7850 5 0000 20 0 367 380 0000 60 0050 85 0000 00 7970 4 7500 21 0 3784 375 0000 61 0144 80 0000 01 8000 4 5000 22 0 3897 370 0000 62 0241 75 0000 02 8090 4 2500 23 0 401 365 0000 63 0325 70 0000 03 8160 4 0000 24 0 4125 360 0000 64 0420 65 0000 04 8210 3 7500 25 0 4239 355 0000 65 0506 60 0000 05
114. onmental Display The display is an eight line by twenty character graphic TFT LCD Enclosure The monitor is bench mountable Rack mounting can be done by using an optional rack mount kit Dimensions are 5 75 W x 2 875 H x 8 75 D Weight is 3Lbs Environmental and Safety Concerns Safety The monitor protects the operator and surrounding area from electric shock or burn mechanical hazards excessive temperature and spread of fire from the instrument e Keep Away From Live Circuits Operating personnel must not remove instrument covers There are no internal user serviceable parts or adjustments Refer instrument service to qualified maintenance personnel Do not replace components with power cable connected To avoid injuries always disconnect power and discharge circuits before touching them e Cleaning Do not submerge instrument Clean exterior only with a damp cloth and mild detergent only e Grounding To minimize shock hazard the instrument is equipped with a three conductor AC power cable Plug the power cable into an approved three contact electrical outlet only Safety Symbols Direct current power line Equipment protected throughout by double insulation or reinforced insulation equivalent to Class II of 1EC536 Alternating current power line Alternating or dirrect current power line Caution High voltages danger of electric shock Background color Yellow Symbol and outline Black Three phase al
115. opment keywords in all SCPI commands may be shortened The short form of a keyword is the first four characters of the word except if the last character is a vowel If so the truncated form is the first three characters of the word Some examples are inp for input syst for system alar for alarm etc 57 SCPI Status Registers The Instrument Status Register The Instrument Status Register ISR is queried using the SYSTEM ISR command The ISR is commonly used to generate a service request when various status conditions occur In this case the ISR is masked with the Instrument Status Enable ISE register The ISR is defined as follows ISR Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 BitO Alarm SFB SFA Where Bit7 Alarm Indicates that an alarm condition is asserted Use the ALARM commands to query individual alarms Bit1 to Bit0 SFx Indicates that a sensor fault condition is asserted on an input channel Use the INPUT commands to query the input channels The Instrument Status Enable Register The Instrument Status Enable ISE Register is a mask register It is logically anded with the contents of the ISR in order to set the Instrument Event IE bit in the Status Byte STB register This can cause a service request to occur Bits in the ISE correspond to the bits in the ISR defined above The Standard Event Register The Standard Event Register ESR is defined by the S
116. ors Temperature range 1 4 to 375K CP 100 series Ceramic Wound RTD 1000 GP 100 GP 100 series Glass Wound RTD 1000 Ruthenium Oxide Temperature range is 1 4 to 40K R400 f l Commonly used with superconducting magnets Ultra low temperature Ruthenium Oxide Temperature R500 range is 1 0 to 40K XP 100 XP 100 series Thin Film 1000 XP 1K XP 1K series Thin Film 1 000Q Table 3 Cryogenic Accessories A Quick Start Guide to the User Interface The Front Panel Model 612 Temperature Monitor BI 877K B e 5 1 K Relay 2 A e Alarm Relay 1 Figure 1 Model 612 Front Panel Home Status Displays The instrument powers up with the home status display This is a status only display and the contents are user selectable The factory default display Model 614 is shown here It shows both channels plus alarm indicators Here the alarm indicators are hidden until an alarm is asserted The monitor has nine different Home Status displays that can be viewed and selected by pressing the Right gt key Several displays show temperature information in a large easy to read Sample Holder font Also shown is the input channel name This name is a convenience that allows easy association of the input channel with its actual 1 2 3 4 5 6 K connection Channel names may be entered by use of the embedded web site or via any of the remote interfaces B Rad Shield 234 567K
117. perate Units Selection gt aims A a odds Seah ened dice dite ecu ad ie 26 Temperature Sensors Carbon Glass ii e ths da ain Athans tht A AA whieh 12 XE Temperature Sensors Cernox Cernox ereina nyia itende raa E Ea A aia A a E a 33 76 COMO M ati aihh ee n A A ts 12 18 CEMOX M hrn A A a diia dad 33 A O O A 75 COMO ia A A a id A idas 76 A NO 97 Cemox iii A A A A A LEA TE AAA ARI 97 COMO ta as e o e ed led o ade casa ers aol dean ae annette hada Z 97 A OX Mia EN E secu A EAE E A E E EE E E A A AA A E N T E E E 97 CO e IN E laa O E AOE EE E acl ts cree stan Reta A thd 97 CEMO M side E A A A a aaa e ii 97 Cernox 97 Cernox 98 connection 103 constantVola DO nica A Tae tasaci n 18 XE Temperature Sensors XE Temperature Sensors GaAlAs diode CP 100 CP 100 wank OPONE Desde ete aha E alts 2er XE Temperature Sensors GaAlAs diode CP 100 pardo DTAS Or ts o ad o e e e es dela UI Ud he 73 DNES STA O a A A A rd E EA 73 GaAIASdIOd e rd A A E Rel Cs odes trae Motte le etal AML 7 12 Galliim Arse nid ninia A it A AA A id da tn 19 Germanium a AA AA EA A A EA Pete Concer eT Terr 12 18 A RN 7 NTE TOS OR a a Cvacaudsacdsucosaneduatendiadehecenand 18 Platinum NN 17 XE Temperature Sensors Platinum RTD PlatinUm RTD ccccceceeeececeeeeeeeseeeeeceeeeeeeaeeeeeeaeeeseeeeeeeaaeeeseaeeeseeeeseeaeeeseeeeeeee 7 PIQUE ENE A eee a tenn vice a i eee ade 5 Platinum RD esse settee co TATTOO AE AA Odia 7 P
118. perature data before relay conditions are tested The user selectable relay deadband is also applied RELays 1 2 Relay Status Query The two auxiliary relays available in the monitor are addressed as 0 and 1 The RELAYS command can be used to query the status of each relay where Relay is in Auto mode and is clear Hi Relay is asserted by a high temperature condition Lo Relay is asserted by a low temperature condition ON Relay is in manual mode and is asserted OFF Relay is in manual mode and is clear RELays 1 2 SOURce A H Relay Input Source Sets or queries the source input channel for a specified relay RELays 1 2 HIGHest lt setpt gt Relay High setpoint Sets or queries the temperature setting of the high temperature setpoint for the specified relay Parameter lt setpt gt is floating point numeric and is in units of the controlling input channel RELays 1 2 MODe AUTo ON OFF Set or query the relay mode Modes are Auto Relay is controlled by enabled high and low setpoints ON Relay is in manual mode and is asserted OFF Relay is in manual mode and is clear Control Relay is asserted whenever the controller is in Control mode RELays 1 2 LOWest lt setpt gt Relay Low setpoint Sets or queries the temperature setting of the low temperature setpoint for a specified relay Parameter lt setpt gt is floating point numeric and is in units of the controlling input channel 67 RELays 1
119. perature sensors so that connections between dissimilar metals are grouped together For example the connection between sensor leads and cryostat wiring should be kept close together This way the thermocouple junctions formed by the connection have equal but opposite voltages and cancel each other In a four wire measurement scheme only connections in the voltage sense lines can cause measurement errors Therefore the sense wires should have adjacent contacts in a multi pin connector in order to minimize any temperature difference between them Usually the connection to copper in a cryostat is made at the top of the cryostat After this point Thermal EMFs cannot be generated AC Excitation When a resistance sensor is selected the monitor uses a square wave sensor excitation This eliminates DC offsets by computing the sensor resistance at two different excitation points 19 Output Channel Features Alarm Outputs Alarm outputs include a LED indicator an audible alarm on screen display and remote reporting Alarms may be asserted based on high temperature or low temperature condition A user selectable dead band is applied to all alarms The High and Low temperature alarms may be latched See the Input Channel Configuration Menu O Note A latched alarm may be cleared by pressing the Right gt key on the front panel when the Home Status screen is displayed Relays The monitor has two large dry contact
120. ported in display units Query only INPut A H UNITs K C F S Sets or queries the display units of temperature used by the specified input channel Units may be K for Kelvin C for Celsius F for Fahrenheit or S for primitive sensor units In the case of sensor units the instrument will determine if the actual units are Volts or Ohms based on the actual sensor type INPut A H NAMe Name String Sets or queries the name string for the selected input channel The name string can be up to 15 ASCII characters The string is used to name the input channel in order to clarify it s use INPut A H BRANge Auto 1 0mA 100uA 10uA Sets or queries the resistance bridge excitation range This is a range hold function Normally this is set to auto so that the instrument will autorange excitation For special applications the resistance bridge may be set to a specific excitation range INPut A H SENPr The INPUT SENPR query reports the reading on a selected input channel For diode sensors the reading is in Volts while resistor sensors are reported in Ohms The reading is not filtered by the display time constant filter However the synchronous input filter has been applied Query only INPut A H SENSor lt ix gt Sets or queries the sensor index number lt ix gt is taken from Appendix A 64 INPut A H ALARm Queries the alarm status of the specified input channel Status is a two character
121. providing 7 5 to 24 Volts AC or DC The IEEE 802 3af Power over Ethernet PoE specification is also supported allowing the monitor to be powered by its local area network connection Since PoE provides both instrument power and data over a single cable remote data acquisition and high channel count systems can be simplified PoE requires the use of a powered hub or power injector Ethernet cables up to 300 meters may then be used Data logging Data Logging is performed by continuously recording temperature and status to an internal circular memory buffer Data is time stamped so that the actual time of an event can be determined Non volatile memory is used so that data will survive a power failure The monitors will log up to 800 samples Each sample includes readings for all input channels Alarms and Relays Two 10 0A dry contact relay outputs are available that can be asserted based on temperature setpoints from user selected input channels These relays are large enough to switch most cryogenic valves The visual remote and audible alarms are supported Each may be programmed to assert or clear based on temperature setpoints Alarms may be latched These are asserted on an alarm condition and will remain asserted until cleared by the user O Note A latched alarm may be cleared by pressing the Right key on the front panel when the Home Status screen is displayed Remote Control Standard Remote Interfaces
122. r titi ir a dias 14 Language Remote interface language is IEEE 488 2 SCPI compli2Nt oooononinonnninnnnnconcconcnanonos 14 Compatibility National Instruments LabView drivers available for all interfaces 14 Ethernet API available tor C and Basic A A ta id 14 O a e oe 14 General AAA A A RE 15 Ambient Temperature 25 C 5 C for specified accuracy cccccccsssssccscssssssscssesesessessecscsssssess 15 Model 612 and 614 Temperature Monitors Mechanical 5 73 WX 28 T HRE 7I cs an aN a a sake aa Ra Salle Pats at s 15 WV SING O as Arey 15 Enclosure Aluminum Extrusion Machined Aluminum front and rear panels ccceceeeeee 15 Power Requirement Input voltage is 7 5 to 48V AC or DC LOVA ow eeeeeceeseeeeeeeeeeeenseeneeees 15 1 External transformer Provided Input 100 240VAC 50 60HZ cococonnccccocccoccconncc nncnns 15 2 IEEE 802 3at Power Over Ethernet requires powered hub or injector oooooonoconiccniccncnncos 15 Performance SUMMA co 16 Input Channel Characi n es oa 17 Output Channel Ear id 20 Remote Interfaces ii AA A AAA AA A a Ad sau 20 Mechanical Form Factors and Environmental cccccccccsssssccceesscececssseeecesssececeesseaeeeenses 21 The User Interact dis 23 OVETVIEW a a e 23 Instrument Setup MENUS sde a ee irese at ounces E R ya ddart sae sues E tae ase vee 24 Basic Operating ProcedUr S o le E 28 Config ringe a Senso sods cases te NA id A rents 28 Usine
123. re MAV is the electronic Measurement Accuracy in Volts MAT is the Measurement Accuracy in Kelvin SenRdg is the sensor reading in Volts at the desired temperature SenSen is the sensor sensitivity in Volts Kelvin at the desired temperature For example if we want to calculate measurement accuracy using a Cryocon S900 sensor at 10K we would look up the sensor reading and sensitivity in the S900 data table in Appendix E At 10K we see that SenRdg is 1 36317 Volts and SenSen is 0 002604 Volts Kelvin Therefore MAV 60 10 5 10 1 36317 MAT MAV 0 002604 The result is that MAV 128uV and MAT 49mK PTC and NTC Resistor Sensors The formulas for PTC and NTC resistor sensors are stated above As an example here is a computation for a PTC resistor with the PTC100 input configuration Where MAR 0 002 1 0 10 SenVal MAT MAR SenRdg MAR is the electronic Measurement Accuracy in Ohms MAT is the Measurement Accuracy in Kelvin SenRdg is the sensor reading in Ohms at the desired temperature SenSen is the sensor sensitivity in Ohms Kelvin at the desired temperature To calculate measurement accuracy using a 100Q Platinum RTD in the PTC100 range with the sensor at 77 35K we would look up the sensor reading and sensitivity in Appendix E and see that SenRdg is 20 380 and SenSen is 0 423 Q Kelvin Therefore we compute MAR 0 0040380 and MAT 9 5mK 16 Model 612 and 614 Temperature Monitors Input C
124. rs Commands are terminated using a semicolon character The semicolon at the end of the line is assumed and is optional The lt gt and characters are for the illustration of the command syntax and not part of the command syntax Command Separators A colon is used to separate a command keyword from a lower level keyword You must insert a blank space to separate a parameter from a command keyword Compound Commands A semicolon is used as a separator character that separates commands within the same subsystem For example sending the following command string INPut A UNITs K TEMPer has the same effect as sending the following two commands INPut A UNITs K INPut A TEMPer 55 If multiple commands address different subsystems the combination of a semicolon and a colon are used The semi colon terminates the previous command and the colon indicates that the next command is in a different subsystem For example INPut A TEMPer LOOP 1 SETPt 123 45 has the effect of sending the following two commands INPut A TEMPer LOOP 1 SETPt 123 45 Queries You can query the current value of most parameters by adding a question mark to the command For example the following command set the setpoint on control loop 1 to 123 45 LOOP 1 SETPt 123 45 You can change it into a query that reads the setpoint by using the following LOOP 1 SETPt The instrument s response will be a numer
125. rted Sensor Configurations The Multiplier field is a signed decimal number that identifies the sensor s temperature coefficient and curve multiplier Generally for Negative Temperature Coefficient NTC sensors the value of the multiplier is 1 0 and for a Positive Temperature Coefficient PTC sensor the value is 1 0 As an advanced function the multiplier field can be used as a multiplier for the entire calibration curve For example a 10KQ Platinum RTD can use a calibration curve for a 100Q Platinum RTD by using a multiplier of 100 0 The fourth line of the header is the sensor units field This may be Volts Ohms or Logohm Generally diode type sensor curves will be in units of Volts and most resistance sensors will be in units of Ohms However many resistance sensors used at low temperature have highly nonlinear curves In this case the use of Logohm units give a more linear curve and provide better interpolation accuracy Logohm is the base 10 logarithm of Ohms Examples of sensor calibration curves that are in units of Ohms include Platinum RTDs and Rhodium lron RTDs Examples of sensors that best use Logohm include Ruthenium Oxide and Carbon Ceramic After the header block there are two to 200 lines of sensor calibration data points Each point of a curve contains a sensor reading and the corresponding temperature Sensor readings are in units specified by the units line in the curve header Temperature is always in Kelvin Th
126. rument must be returned to Cryomagnetics for repair or recalibration a Return Material Authorization RMA number must first be obtained from the factory This may be done by telephone FAX or e mail When requesting an RMA please provide the following information 1 Instrument model and serial number 2 User contact information 3 Return shipping address 4 If the return is for service please provide a description of the malfunction If possible the original packing material should be retained for reshipment If not available consult factory for packing assistance Cryomagnetics shipping address is Cryomagnetics Inc 1006 Alvin Weinberg Drive Oak Ridge TN 37830 USA Model 612 and 614 Temperature Monitors Options and Accessories Instrument Accessories Part Description 05 0006 AC Power Cord 4034 038 Dual Sensor Cable 2 x 8 foot 4034 033 Shielded Sensor Connector Kit DB9 3012 020 Panel Mount hardware kit See Appendix C 3012 021 Bench top instrument stand See Appendix C 3012 022 Tilt stand and carry handle Appendix C Ee o 4001 003 Single Power over Ethernet Power injector 4001 002 IEEE 488 2 GPIB Option Field installable 4001 001 ed Serial Port Emulation Field 3038 029 Additional User s Manual CD Cryogenic Accessories Table 2 Monitor Instrument Accessories Part Description S900 S900 series Silicon Diode Temperature Sens
127. rver Network Configuration Menu Information Only Device name May be changed by the embedded web server or a remote interface 1 Dev NewCryomagnetics Information Only MAC address 2 00 50 C2 6F 43 3E Unique 12 digit number for each instrument 3 DHCP Ena Off tas enable Recommended F Press Enter to change the unit s 4 e IP 1 92 1 68 F 0 4 Ethernet IP address 5 e MSK 255 255 255 0 Press Enter to change the unit s Ethernet subnet mask 6 e Gwy 192 168 1 1 Press Enter to change the unit s Ethernet gateway IP i TCP IP port number UDP port 7 Port 5000 is TCP IP port plus one Information Only Displays last command received over a gt s remote interface Used for debugging remote programs Information Only Displays last 9 lt command sent over a remote interface Used for debugging remote programs The Time Date Setup Menu The Time Date Setup Menu is used to set the system s time and date settings Time Date Setup Menu 1 le Time 11 04 03 System time Press Enter to set 2 le Date 7 1 04 System Date Press Enter to set Basic Operating Procedures Configuring a Sensor Before connecting a new sensor to the monitor the instrument should be configured to support it Most common sensors are factory installed while others require a simple configuration sequence Note Sensor configuration from the instrument s fro
128. ryomagnetics s Ruthenium Oxide sensors are available in a small 0 95 x 0 2 cylindrical canister package Construction Gold plated cylindrical OHFC copper canister Stycast epoxy filler There is no internal atmosphere Epoxy limits the maximum storage temperature to 400K Leads Four 36 AWG Phosphor Bronze color coded Formvar insulation Mass 0 4g Installation Use a 0 101 diameter drill Place a small amount of Apiezon N grease in the hole before inserting the sensor Ensure that the leads are thermally anchored Cable Color Code Clear Green Black Red Connection All connections should be 4 wire in order to eliminate errors due to lead resistance Leads are coated with Butyl and may be separated by dipping them in Isopropyl Alcohol Lead insulation is heavy Formvar which is difficult to strip Techniques include use of a mechanical stripper or scrapping with a razor blade 90 Appendix F Configuration Scripts The Utility Software package can be used to send configuration scripts to the instrument These scripts consist mostly of standard remote commands and queries Scripts can be used to completely configure an instrument including setting custom sensor calibration curves and PID tables They are commonly used in a manufacturing environment to set a baseline state for a target product In the laboratory scripts can be used to save and restore configurations for various experiments XML or E
129. s saves the entire instrument configuration to flash memory so that it will be restored on the next power up Generally only used in environments where AC power is not toggled from the front panel This includes remote and rack mount applications 63 SYSTem RESeed Re seeds the input channel s averaging filter allowing the reading to settle significantly faster The display filter may have filter time constants that are very long The RESEED command inserts the current instantaneous temperature value into the filter history thereby allowing it to settle rapidly Note The RESEED command is useful in systems where a computer is waiting for a reading to settle Issuing the RESEED command will reduce the required settling time of the reading SYSTem TIMe hh mm ss Sets or queries the instrument s time Time is in string format and is surrounded by double quotes Format is hh mm ss for hour mm ss Twenty four hour format is used Input Commands The INPUT group of commands are associated with the configuration and status of the four input channels Parameter references to the input channels may be e Numeric ranging in value from zero to seven Channel ID tags including CHA or CHB e Alphabetic including A or B INPut A H or INPut A H TEMPerature The INPUT query reports the current temperature reading on any of the input channels Temperature is filtered by the display time constant filter and re
130. ser to fit an existing sensor calibration curve to one two or three user specified points The result is a high accuracy sensor calibration at low cost Configuration of any of the instrument s remote interfaces Interactive Mode provides interactive communication with the instrument over any of the remote interfaces Installing the Utility Software From a CD the utility software package does not require installation It can be executed from the CD directly by running the UTILITY EXE program When the software is downloaded off of the Internet it is in a self extracting ZIP format and must first be un zipped onto hard disk 37 Connecting to an Instrument The desired remote interface connection may be selected by clicking Comm gt Port Select from the main menu Comm Operations DataLogging View Help User Options Short Cuts Sensor Curve Download PID Table Download Select the port to communicate with controller nera C R8232 CalGen C GPIB LAN Data Logging Upload Internal Cancel DataLog Connect Comm Type LAN Status Error No Device Wer Select the desired communications port and then click OK Click on the Connect button of the shortcut menu bar or on Comm gt Connect from the main menu to connect to the instrument After a short delay the connect LED should light and the instrument type will be displayed Also most of the grayed out fields on the menu b
131. software provided with the indicator 12 Model 612 and 614 Temperature Monitors Sensor Performance Diode Sensors Configuration Constant Current 10uA 0 05 DC excitation Note Current source error has negligible effect on measurement accuracy Input voltage range 0 to 1 8VDC Accuracy 80uV 0 005 reading Resolution 2 31 V Drift lt 25ppm C PTC Resistor Sensors Configuration Constant Current AC resistance Drift 25ppm C Excitation Frequency 1 625Hz bipolar square wave Max Min Excitation 3 Range Resistance Current Resolution Accuracy PTC100 4000 1mA 0 010 1 0mA 0 1mQ 0 004 0 01 Q PTC1K 4 0KQ i 100A ia 100pA 1 0MQ 0 05 0 02 Q Table 6 Accuracy and Resolution for PTC Resistors NTC Resistor Sensors DC measurement RO 105 Ruthenium Oxide Configuration Constant Current DC resistance Approximately 1 0yA excitation Ratiometric measurement cancels any error in excitation current Measurement Drift 25ppm C Range 230KQ to 100KQ Accuracy 1 0KQ 100KQ Drift lt 25ppm C Resolution 10Q Note The NTC10uA range is intended for use with NTC sensors that have over 100Ka of resistance These sensors are commonly used in superconductor systems and include the SI RO 105 Ruthenium Oxide device All other NTC resistor sensors should use the constant voltage configurations Thermocouple Sensors Thermocouple devices are supporte
132. ss and hold the Right gt key while turning AC power back ON Keep the key pressed until you see the power up display Set Factory Defaults Then press the DEC W key to restore defaults or the INC A key to continue without resetting Clearing a latched alarm When a latched alarm is asserted pressing the Right gt key will clear it Re seeding the display time constant filter The display time constant filter may be set up to 64 seconds and therefore might take an exceptionally long time to settle if some event has caused a quick change in the input temperature Re seeding the filter will cause the display to immediately settle at the new temperature To re seed the filter navigate to the Home Status display and press the INC A key The displayed temperature should immediately stabilize Under remote control use the SYS RESEED command Specifications Features and Functions Specification Summary User Interface Display Type 21 x 8 character or 128x64 graphics TFT LCD Number of Inputs Displayed Two Model 612 or Four Model 614 Keypad Sealed Silicon Rubber Temperature Display Six significant digits autoranged Display Update Rate 0 5 Seconds Display Units K C F or native sensor units Display Resolution User selectable to seven significant digits Input Channels Input channels are identical and each may be independently configured for any of the supported sensor types Sensor Connection 4 wire differen
133. t channel statistics OFFSET is the offset of the best fit straight line passing through all temperature samples that have been collected since the STATS RESET command was issued OFFSET is in units of the input channel display INPut A H STAts TIMe Queries the time duration over which input channel statistics have been accumulated Time is reset by issuing the STAt RESet command Query only INPut A H STAts RESet Resets the accumulation of input channel statistical data Command only affects the selected input channel INPut A H TCOFfset lt offset gt Sets or queries the offset value for thermocouple inputs lt offset gt is the decimal value of offset and is in units of Kelvin Refer to the section on Using Thermocouple Sensors for more information INPut A H TCGAin lt gain gt Sets or queries the gain value for thermocouple inputs lt gain gt is the decimal value of the gain applied to thermocouple readings and is in units of volts per volts Refer to the section on Using Thermocouple Sensors for more information Relay Commands The relay subsystem includes the two auxiliary relays in the monitor Using the RELAYS commands these relays are independently configured to assert or clear based on the status of any of the four sensor input channels Relay outputs are dry contact and are available on the rear panel of the instrument The user selectable display time constant filter is applied to input channel tem
134. tat connector 102 RS 232 DB9 null modem connection This connector is also used for the USB serial port emulator option Relays A four pin 3 5mm detachable terminal block is used to connect to the Normally Open contacts of the two relays Contact ratings 10A 125 VAC 5A 250VAC or 5A 30VDC Sensor Connections All four sensor connections are made at the rear panel of the monitor using the two DB 9 receptacles provided There are two channels on each connector Four Wire Sensor Connections Silicon Diode and all resistor type sensors should be connected to the monitor using the four wire method It is strongly recommended that sensors be connected using shielded twisted pair wire Cable shields O O should be dressed for connection to the conductive backshell of the connector Signal connection is as follows Figure 3 Input Connector pies Signal Pin A Excitation Current 8 A Excitation Current Signal Ground 9 A Voltage Sense 4 A Voltage Sense 5 B Excitation Current 6 B Voltage Sense 1 B Voltage Sense 2 Option power 5 DC 500mA 3 Table 17 Sensor Input Connector Pinout Caution Pin 3 of each input connector is used to power external options such as the dual thermocouple module If there is no option present this pin should be left unconnected Note Since power supplied to the instrument does not generally provide an earth ground refere
135. ted in the individual input channel setup menus Temperature Units may be K C or F When Sensor Units S is selected the raw input readings are displayed These will be in Volts Ohms or milli Volts depending on the specific sensor Asensor fault condition is identified by a temperature display of seven dash characters as shown here The sensor is open disconnected or shorted If a temperature reading is within the measurement range of the instrument but is not within the specified Sensor Calibration Curve a display of seven dot characters is SEA shown Table 5 Temperature Units 10 Model 612 and 614 Temperature Monitors Power ON OFF Pressing the Power e key will toggle the instrument s AC power on and off This key must be pressed and held for two seconds before power will toggle Note The monitor uses a smart power on off scheme When the power button on the front panel is pressed to turn the unit off the instrument s setup is copied to flash memory and restored on the next power up If the front panel button is not used to toggle power to the instrument the user should configure it and cycle power from the front panel button one time This will ensure that the proper setup is restored when AC power is applied Restoring Factory Defaults Factory default settings may be restored with the following simple procedure 1 Turn AC power OFF by pressing the Enter e key for two seconds 2 Pre
136. ternating current power line Earth ground terminal Caution or Warning See instrument documentation R Background color Yellow Symbol Frame or Chassis terminal and outline Black On AC Power Protective conductor terminal gt e p y Fuse Off AC Power O A Ae 21 Environmental Conditions Environmental conditions outside of the conditions below may pose a hazard to the operator and surrounding area Indoor use only Altitude to 2000 meters Temperature for safe operation 5 C to 40 C Maximum relative humidity 80 for temperature up to 31 C decreasing linearly to 50 at 40 C Power supply voltage fluctuations not to exceed 10 of the nominal voltage Over voltage category Il Pollution degree 2 Ventilation The instrument has ventilation holes in its side covers Do not block these holes when the instrument is operating Do not operate the instrument in the presence of flammable gases or fumes Operation of any electrical instrument in such an environment is a definite safety hazard 22 The User Interface Overview The Models 612 and 614 user interface consists of an eight line by 21 character TFT LCD display and a four key keypad Most features and functions of the instrument can be accessed via this simple and intuitive menu driven interface Complex functions such as downloading a new sensor calibration curve require using one of the remote interfaces The instru
137. text editor programs Data Logging Setup The best way to setup data logging is by using the embedded web server However it can also be performed from the front panel The first step is to ensure that the instrument s real time clock is set to the current time This can be done by opening the embedded web page The current time is shown on the bottom of the Status Page and the clock may be set by going to the System page From the front panel the current time can be viewed and updated by going to the Time Date Setup menu Data logging can be configured and enabled from the embedded web server s System page The Logging Enable field turns logging on and off and the Interval field sets the logging sample rate The Current Count field shows how many samples have been accumulated From the front panel data logging may be configured by going to the System Setup menu and scrolling down to the Data Log Enable and Interval fields Once enabled data logging will continue until stopped When the input buffer is full new samples will over write the oldest samples Reading the Data Log Buffer Reading or uploading the monitor data logging buffer is best done using the Utility Software Launch the software and connect to the instrument Next click on the Data Logging menu field and then click on Upload This will launch a series of dialog boxes that will take you through the data logging process O Note The Utility Software can perform data
138. that is outside of the limits for use in magnetic fields Shaded entries are outside of the monitor s temperature range Lakeshore TG 120 GaAlAs Diode Name User Supplied Configuration Diode T K Volts mV K 1 4 5 3909 97 5 4 2 4 7651 214 10 3 7521 148 20 2 5341 97 5 30 1 8056 48 2 50 1 4637 2 82 77 35 1 4222 1 24 100 1 3918 1 48 150 1 2985 2 25 200 1 1738 2 64 250 1 0383 2 77 300 0 8978 2 85 350 0 7531 2 99 400 0 6066 2 97 450 0 4556 3 08 475 0 3778 3 15 95 Platinum RTD Rhodium Iron Platinum RTD sensors feature high stability low Rhodium lron sensors feature high stability low magnetic field dependence and excellent magnetic field dependence and reasonable interchangeability They conform to the DIN43760 interchangeability Sandan GUNE The monitor supports them with 1 0mA Constant The monitor uses 1 0mA Constant Current AC Current AC excitation excitation Rhodium Iron 270 Platinum RTD DIN43760 and IEC751 Name RhFe 27 1mA Configuration PTC100 Name Pt100 385 Configuration PTC100 T K Ohms QIK Name Pt1K 385 Configuration PTC1K 14 1 5204 0 178 T K ohms Q K 4 2 1 9577 0 135 20 22913 0 0983 10 2 5634 0 081 30 3 6996 0 134 20 3 1632 0 046 50 2 3069 9 360 30 3 5786 0 040 77 35 20 380 0 423 50 Te anes 100
139. the instrument will negotiate power requirements with the hub and then power itself from the Ethernet cable Since power and data are taken from a single cable wiring can be simplified Power Over Ethernet supplies are NOT earth ground referenced Some other connection between the instrument s chassis and earth ground should be fabricated in order to minimize noise coupling 106 IEEE 488 2 Connections The optional IEEE 488 2 GPIB connection is installed by connecting the dongle to the Ethernet port using the crossover LAN cable provided The interface will be configured by the instrument and will appear to your system as a standard IEEE 488 2 device RS 232 Connections The monitor uses a DB 9 dual female null modem cable for RS 232 serial communication The pin out of the connector is as follows Pin Function Pin Function 1 NC 6 NC 2 RXD Receive data 7 NC 3 TXD Transmit data 8 NC 4 NC 9 NC 5 Ground Table 22 RS 232 DB 9 Connector Pinout An example cable is Digikey Inc part number AE1033 ND The wiring diagram for this cable is shown below Note that communication with the monitor only requires connection of pins 2 3 and 5 All other connections are optional paa N Model 34 PC _ DCD FN 3 3 TX 4 4 DTR 6 6 DSR ee ee 8 8 CTS 9 MIMI O RI DB9 DB9 DB9 Female Female Male Figure 6 RS 232 Null Modem Cable 107 INDEX AC power Single Point Groundy wa se
140. the programmer to set a line termination character This character is then appended to each string sent to the controller and stripped from returned strings In this case the n OxA character should be selected Checking the RS 232 connection with Hyperterminal Hyperterminal or any other RS 232 communications program can be easily used to test the connection Run the program and configure it with instrument s serial configuration in order to type in basic commands For example IDN should return Cryomagnetics Model 612 204683 1 01A When working with the RS 232 interface it is convenient to go to the Network Configuration Menu The bottom two lines of this screen show the last line received and sent by the instrument USB option configuration The external USB option is automatically configured by the instrument when it is plugged into the RS 232 port Your computer will see it as an extra COM port Use it for communications just like any other RS 232 port 53 Introduction Remote Programming Guide General Overview This brief is intended to assist the user interested in remote programming of the instrument Since the language supports both simple and advanced functions it may initially seem complex However the use of English language keywords and a tree structured architecture make it easy to read and learn Language Architecture e The industry standard SCPI language defined by the IEEE 488 2 standard is used
141. tial DB 9 receptacles connect two channels Connections are described in the Sensor Connections section Isolation Sensor circuits are not electrically isolated from other internal circuits However there is a single point internal connection to Earth or Shield ground in order to minimize noise coupling Input Protection 30 Volts maximum 11 Supported Sensors Include Type Excitation Temperature Range Cernox Constant Voltage AC 1 4K to 420K Ruthenium Oxide Constant Voltage AC 1 4K to 273K Germanium Constant Voltage AC 4 2K to 100K Carbon Glass Constant Voltage AC 1 4K to 325K Silicon Diode 104A DC 1 4 to 500K Rhodium lron Constant Current 1mA AC 1 4 to 800K Platinum RTD Constant Current 1mA AC 14 to 1200K GaAlAs Diode 104A DC 25K to 325K RO 105 RuOx 10nA DC 4 2K Thermocouple None 1 4 to 1500K Sensor Selection Front Panel or remote interface There are no internal jumpers or switches Sample Rate 15Hz per channel in all measurement modes Digital Resolution 24 bits Measurement Filter 0 5 1 2 4 8 16 32 and 64 Seconds Calibration Curves Built in curves for industry standard sensors plus eight user curves with up to 200 entries each Interpolation is performed using a Cubic Spline CalGen6 Calibration curve generator fits any Diode or resistor sensor curve at 1 2 or 3 user specified temperature points CalGen is implemented in the Utility
142. tion dialog box to appear as follows open 2X Look in SJ Model 34 e ex Fe E TCTypeT crv arte E cx1030 1 crv i TCTypeE crv PE E PT100385 crv Es TCTypek crv Files of type Curve Files crv 340 y Cancel Z From this screen the desired calibration curve is selected Cryomagnetics calibration curves have the file extension of CRV Lakeshore curves with the extension 340 may also be selected Scientific Instruments txt files may be downloaded by first selecting a file type of and then selecting the desired calibration curve file CRV files are ASCII text files that may be edited by any text editor After selecting the file and clicking on Open the selected file will be read and the Edit Curve Header dialog box will appear This box contains information extracted from the curve file header that can be modified if desired before the curve is downloaded xi Sensor Name TC AuFe pct Sensor Type Tc80 Multiplier 1 Unit Volts Number of Pts 101 o ao Display Curve J Save as cry file Sensor Name is any 15 character string and is only used to identify the sensor Sensor type can be selected from a pull down menu or entered directly Note that different models of Cryomagnetics instruments support different types of sensors Therefore it is important to enter a sensor type that is supported by the specific product If the instrument receives a sensor type that it does not
143. tire update process However when the update is complete factory defaults are restored and the IP will be set to 192 168 1 5 Forcing a firmware download A firmware download does not generally need to be forced since the Firmware Utility will automatically set the download state However if the unit is non functional a firmware download may be forced as follows 1 Press and holding the DEC W key during power up 2 When the Operator Abort message appears press the DEC W key to continue normally or press the INC A key to abort to the firmware downloader Loading Firmware Start the firmware update by running the Firmware Utility This launches a dialog box as shown here Firmware HEX file F Firmware CMI612_211 hex Instrument IP Device 192 168 0 120 Discovery Set Flash Mode Reset Exit Status Connected Rev 2 11E The instrument s default IP will appear in the dialog box This can be changed if necessary Click the Connect button The status box should update to indicate a connection but the instrument display will not change Next the firmware update file needs to be selected Click on the browse button to launch a file selection dialog 79 Select the firmware hex file and click Open The Firmware HEX file field will be updated with the file name Also the Set Flash Mode button will become active Caution Once you click the Set Flash Mode button the instrument will e
144. types of instruments It is easy to learn and easy to read Command Scripts can be used to completely configure an instrument including setting custom sensor calibration curves and PID tables Further scripts can query and test data They are commonly used in a manufacturing environment to set a baseline state and test a target product In the laboratory scripts can be used to save and restore configurations for various experiments XML Extensible Markup Language is used for the structure and format of script files XML can be generated and edited with a standard text editor Further it is easy to read and understand Firmware Updates Full instrument firmware updates may be installed by using the Ethernet connection Updates are free of charge and generally include enhancements and new features Model 612 and 614 Temperature Monitors Ethernet API An Applications Program Interface API package is supplied that facilitates communication with the instrument using the TCP IP and UDP protocols It is supplied as a Microsoft Windows DLL that is easily linked with C C or Basic programs Preparing the Monitor for Use Model Identification The model number is identified on the front and rear panel of the instrument as well as in various instrument displays Part Number Description Model 612 Two channel monitor Includes 12VDC external power supply Model 614 Four channel monitor Includes 12VDC external power supply
145. ual instrument firmware During the normal power up sequence the boot loader tests the external flash memory and then transfer execution to it in order to run the instrument s firmware From there the Cryomagnetics firmware update utility can be used to update instrument s firmware The firmware update sequence is as follows 1 Connect the LAN port of the instrument to your PC turn the instrument ON and then run the FWutility exe 2 Click the Connect button to connect the PC to the instrument using TCP IP If there is an error a dialog box will appear Correct the problem and re try 3 While connected the instrument still functions normally Click on the Set Flash Mode button to place the instrument in the firmware update mode In this mode the instrument executes the boot loader from the Internal flash memory and is waiting to program the External memory with the new firmware Click Connect again and then click the Program Verify button to start the update process When the update process is complete the instrument will automatically reset itself and start running the updated firmware Updating unit firmware Before starting be sure to have the FWutility exe file and a hex file that contains the desired firmware update On the instrument check the current hardware and firmware revision by pressing the System key and scrolling down to the revision field A typical display is FW Ver 3 00D meaning that the instru
146. ue of 1 0 It is usually computed by gain UT LT UM LM where UT is the upper target and LT is the lower target UM is the upper measurement and LM is the lower measurement Gain values greater than 1 2 or less than 0 8 are rejected as out of range Offset is in units of Volts or Ohms depending on the calibration type Nominal value is 0 0 Positive or negative numbers are accepted It is usually calculated by Offset UT gain UM Summary of Calibration Types Calibration data must be generated for each input channel by sequencing through the various calibration types on each channel A summary of types is given here Calibration Type Voltage Range Output Current Description Voltage measurement for use with Silicon diode SI Diodey CERAN NA temperature sensors SI Diode N A 10pA 10A constant current source used with Silicon diode sensors 1mA AC 100mV 1 25Hz 1 0mA 1mA range used with constant voltage mode sensors 100uA AC 100mV 1 25Hz 1004A 100A range used with constant voltage mode sensors 10uA AC 100mV 1 25Hz 104A 10A range used with constant voltage mode sensors 1mA DC 0 2 5VDC 1 0mA DC measurement of 100 Platinum RTD sensors 100uA DC 0 2 5VDC 100A DC measurement of 1K Ohm Platinum RTDs Calibration of Silicon Diodes Silicon Diode sensors require the application of a precision 10u A current followed by reading the voltage drop across the device Therefore calibr
147. urces Thus accuracy is generally improved by increasing the power dissipated in the sensor Conversely at low temperature NTC resistors have high resistance and the primary source of error is sensor self heating caused by excitation power The resistor has high sensitivity in this region so measurement errors are small when viewed in units of temperature Constant voltage sensor excitation increases signal power at warm temperature thereby improving measurement accuracy in an area where the sensor is less sensitive At low temperature constant voltage excitation reduces the power dissipated in the sensor which reduces accuracy in units of Ohms but more importantly reduces sensor self heating Since low temperature is the sensor s most sensitive area temperature measurement accuracy will not be degraded The result is an accuracy improvement that extends the useful temperature range of a given sensor at both the warm and cold ends 30 Model 612 and 614 Temperature Monitors Data Logging The monitor has an internal data logging capability that uses non volatile memory Logging of input channel temperature data is performed to a circular buffer that contains up to 1 000 samples Each sample contains all eight temperature readings plus a time stamp from a real time clock The data logging buffer may be read by using the Utility Software package This will save the logging buffer as a text file CSV that can be opened by spreadsheet and
148. used by test and measurement instruments SCPI commands are based on a hierarchical structure also known as a tree system In this system associated commands are grouped together under a common node or root thus forming subsystems A portion the command tree for a Cryomagnetics instrument is shown here INPut SYSTem TEMPerature BEEP UNITs ADRS VARIance LOCKout SLOPe ALARm NAMe LOOP CONFig SETPT SAVE RANGe RESTore RATe In the above INPut and LOOP are root keywords whereas UNITs and RATe are second level keywords A colon separates a command keyword from lower level keyword Command Format The format used to show commands is shown here INPut A B C D ALARm HIGH lt value gt NAMe name The command language is case insensitive but commands are shown here as a mixture of upper and lower case letters The upper case letters indicate the abbreviated spelling for the command For shorter program lines send the abbreviated form For better program readability send the long form For example in the above statement INP and INPUT are all acceptable Braces enclose the parameter choices for a given command string The braces are not sent as part of the command string A vertical bar separates multiple parameter choices for a given command string Triangle brackets lt gt indicate that you must specify a numeric value for the enclosed parameter Double quote marks must enclose string paramete
149. xtensible Markup Language is used for the structure and format of script files XML can be generated and edited with a standard text editor but advanced users may want to use one of the commonly available XML editors Since it provides a structure and allows user documentation it is easy to read and understand Configuration scripts have a file extension of xml These files are sent to an instrument by using the Operations gt Send Command File function of the Utility Software Any remote command or query that is recognized by the instrument can be used in a script file This includes commands that read and write user sensor calibration curves and PID tables A complete description of available remote commands is given in the chapter titled Remote Programming Guide The Remote Command Tree section is particularly useful for the advanced user Script File Structure Header and Footer Like all XML files script files have the following header and footer lt xml version 1 0 gt lt Transactions gt lt Transactions gt All user supplied information is placed between the Transactions tags Basic XML Tags Comment lt gt Inserts a comment in the file for documentation and readability The comment within the angle brackets after the exclamation is ignored by the software lt Download User Curve 4 gt Model lt Model gt lt Model gt Contains the Cryomagnetics instrument model number for source destination verification
150. y that the instrument has a message for the host in it s output queue It is queried using the Common Command STB Bits are defined as follows STB Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 BitO RQS SE MAV IE Where Bit6 RQS Request for Service Bit5 SE Standard Event This bit is set as the logical AND of the ESR and ESE registers Bit4 MAV Message Available Bit3 IE Instrument Event This bit is set as the logical AND of the ISR and ISE registers The Status Byte Register The Status Enable Register SRE is defined by the mask register for the STB It is set and queried using the Common Commands SRE 59 Remote Command Tree SYSTem ADRes lt address gt SYSTem AMBient SYSTem BAUD 9600 19200 38400 57200 SYSTem BEEP lt seconds gt SYSTem DATe mm dd yyyy SYSTem DISTc 0 5 1 214 8 16 32 64 SYSTem DRES FULL 1 2 3 SYSTem FWREV SYSTem HOMe SYSTem HWRev SYSTem RESeed SYSTem NAME name SYSTem NVSave SYSTem RESeed SYSTem TIMe hh mm ss INPut A H or INPut A H TEMPerature INPut A H UNITs K C F S INPut A H NAMe Input Channel Name INPut A H SENPr INPut A H BRANge Auto 1 0mA 100uA 10uA INPut A H SENSor lt ix gt INPut A H ALARM INPut A H ALARm HIGHest lt setpt gt INPut A H ALAR
151. y using Cryomagnetics utility software or by use of remote commands System Functions Menu 1 State Off Starts or stops data logging Sets the logging interval in units of 2 Interval 5sec oe 5 Information Only Number of samples 3 Count O loaded A ere AA Most recent date time stamp eDelete Data Buffer Clears the data logging buffer Table 11 Data logging Setup Menu Relay Configuration Menu The two internal relays are configured by this menu Relay Menu 1 Rel ay 1 Setu p Menu Starts or stops data logging 2 1 Source ChA Sets the logging interval in units of seconds 3 1 Srce Temp a rat del ata Sey de K Information Only Number of samples logged 4 1 R1 y Status Information Only Current relay status Relay operating mode Choices are Auto ManualON 5 1 Mode Auto ee their respective enables Deadband Sets the amount above or below the 6 1 Deadband 0 250 setpoint that the input channel s temperature has to be in order to toggle the state of the relay 7 1 Hi gh 200 00 High setpoint 8 1 High Enable No High setpoint enable 9 1 Low 100 00 Low setpoint 10 1 Low Enable No Low setpoint enable 27 The Network Configuration Menu The Network Configuration Menu is accessed from the System Setup Menu It is used to configure basic Ethernet LAN settings For advanced network settings use a web browser to view the embedded web se

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