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211a temperature monitor manual ()

1. ene neret eene 20 Front Panel Keypad Lock Command 20 Front Panel Keypad Lock Query Input Reading Status Query eee Relay Control Parameter Command sess 21 Relay Control Parameter Query eene 21 Sensor Units Input Reading Query eee 21 Remote Operation 4 13 4 2 1 IDN Input Returned Format Example RST Input Remarks ALARM Input Format Remarks Example Lake Shore Model 211 User s Manual Interface Commands In Alphabetical Order Identification Query IDN term manufacturer model serial date term aaaa aaaaaaaa aaaaaaa mmddyy manufacture Manufacturer ID model Instrument model number serial Serial number date Instrument firmware revision date LSCI MODEL211 21A0000 022607 Reset Instrument Command RST term Sets instrument parameters to power up settings Input Alarm Parameter Command ALARM lt off on gt high value low value lt deadband gt lt latch enable gt term n nnn n nnn n nn n n lt off on gt Determines whether the instrument checks the alarm for input where 0 off and 1 on Sets the value the temperature is checked against to activate the high alarm Sets the value the temperature is checked against to activate low alarm Sets the value that the temperature must
2. Pos 100 Platinum Rhodium Iron 500 Pt 500 Q 1 mA RTD gt 675 1000Pt 50000 ima 1000 GO Platinum Pos RTD High Negative Temp Temperature log Carbon Glass ntertd 7500 Q 10 pA Coefficient O K Neg Germanium NTC RTD and Thermox Refer to the Lake Shore Temperature Measurement and Control Catalog for complete details on all Lake Shore Temperature Sensors 3 4 Operation Lake Shore Model 211 User s Manual 3 5 2 Curve Selection The Model 211 supports a variety of temperature sensors sold by Lake Shore and other manufacturers After the appropriate sensor type is selected for the input Paragraph 3 5 1 an appropriate temperature response curve may be selected The Model 211 can use curves from several sources Standard curves are included with every instrument and numbered 1 through 7 A single user curve can be loaded via the serial interface when a sensor does not match a standard curve CalCurve option can be stored as the user curve at the factory or by the customer The complete list of standard curves built in to the Model 211 is provided in Table 3 2 Curve tables are listed in Appendix A of this manual During normal operation only the curves related to the input type selected are displayed If the curve you wish to select does not appear in the selection sequence make sure the curve format matches the recommende
3. esee 3 9 Table 3 4 Analog Output Scales in Sensor 3 9 Table 3 5 Conversion Parameters for Temperature in K 3 9 Table 3 6 Model 211 Default Values eene 3 10 Table 3 7 Recommended Curve Parameters sess 3 12 Table 4 1 Serial Interface Specifications sess 4 3 Table 4 2 Serial Interface Program Control Properties 4 6 Table 4 3 Visual Basic Serial Interface Program 4 8 Table 4 4 Interface Commands Alphabetical Listing 4 13 Table 5 1 Calibration Table for Resistive Ranges 5 9 Table A 1 Lake Shore DT 470 Silicon Diode Curve 10 A 1 Table A 2 Lake Shore DT 670 Silicon A 2 Table A 3 CTI Curve C Silicon Diode sess A 3 Table A 4 Lake Shore PT 100 1000 Platinum RTD Curves A 4 iv Table of Contents Lake Shore Model 211 User s Manual CHAPTER 1 INTRODUCTION 1 0 GENERAL This chapter provides an introduction to the Model 211 Temperature Monitor The Model 211 was designed and manufactured in the United States of America by Lake Shore Cryotronics Inc A general description is provided in Paragraph 1 1 specifications in Paragraph 1 2 safety su
4. The next setting is the low alarm setpoint indicated by a L on the left of the display Its setting is similar to the high alarm setpoint listed above Press the Enter key to store the low alarm setpoint The next setting is the alarm deadband indicated by a d on the left of the display Its setting is similar to the high and low alarm point settings except that the maximum value that can be set is 99 9 K Press the Enter key to store the alarm deadband The final setting is alarm latching The display will show LtCH along with the setting 0 indicating that the latch function is turned off and a 1 indicating that it is turned on Use the A or Y key to set the alarm latching status Press the Enter key to store the alarm latching status The display will return to normal operation 3 7 RELAY SETUP There are two relays on the Model 211 numbered 1 and 2 They are most commonly thought of as alarm relays but they may be manually controlled The relays are rated for 30 VDC and 1 A The terminals are in the Input Output connector on the Model 211 rear panel See Figure 2 3 When using relays with alarm operation set up the alarms first Paragraph 3 6 Relay 1 is tied to the low alarm operation and relay 2 is tied to the high alarm operation To begin relay setup press the Select key and use the A or Y key to select rELAy and press the Enter key Relay 1 will be setup first indicated by the r1 on the left of the display Us
5. 0 99827 Calibration Command CALG 2 1 0 99827 Send the CALSAVE command to finalize the calibration 5 12 Service Lake Shore Model 211 User s Manual 5 6 4 Calibration Specific Interface Commands ANALOG Input Format Remarks ANALOG Input Returned Format Service Analog Output Parameter Command ANALOG lt mode gt lt range gt term n n lt mode gt Specifies analog output voltage mode current mode voltage calibration mode or current calibration mode 0 Voltage mode 1 Current mode 3 Current calibration mode 4 Voltage calibration mode lt range gt Specifies analog output range Valid entries are 0 0 20 K or 0 output calibration mode 1 20 100 K or 5096 output calibration mode 2 0 200 K or 100 output calibration mode 3 0 325K 420 475K 5 0 1000K Allows manual setting of analog output values for calibration purposes Analog Output Parameter Query ANALOG term lt mode gt lt range gt term n n Refer to command for description CALG Input Format Remarks CALG Input Returned Format Returned Format CALREAD Input Returned Format Remarks 5 14 Lake Shore Model 211 User s Manual Gain Calibration Constant Command CALG lt input gt lt type gt lt value gt term n n n nnnnn input Specifies input or analog output the gain calibration constant will be provided to Valid entries are 1 for input and 2 for the analog output
6. Lake Shore Model 211 User s Manual This Page Intentionally Left Blank Lake Shore Model 211 User s Manual TABLE OF CONTENTS Chapter Paragraph Title Page 1 INTRODUCTION 1 1 1 0 GENERAL nre ROTER IRR pete n 1 1 l l DESCRIPTION etr erdt ERR here 1 1 L2 SPECIFICATIONS icerir aana tereira sr ass 1 3 L3 SAFETY SUMMARY 1 8 14 SAFETY SYMBOLS eet ettet 1 9 2 INSTALLATION u nasa en aeneus 2 1 20 GENERAL tere o POT HOT ERU RHEIN 2 1 2 INSPECTION AND UNPACKING a aaa 2 1 2 0 REAR PANEL DEFINITION cete 2 2 2 3 POWER INPUT CONNECTOR eee 2 2 2 4 EXTERNAL POWER SUPPLY eee 2 3 2 5 CABEB CLAMP prenien dita PU Ue 2 3 2 6 SENSOR INPUT u u ue eee OHIO 2 3 2 6 1 Input Output Connector eese 2 4 2 6 2 Sensor Lead Cable n sse 2 4 2 6 3 Shielding Sensor Leads eee 2 5 2 6 4 Instrument Grounding essere 2 5 2 6 5 Sensor Polarity eene dee 2 6 2 6 6 4 Lead Sensor Measurement sss 2 6 2 6 7 2 Lead Sensor Measurement aaa 2 7 2 6 8 Lowering Measurement Noise eee 2 7 2 1 ANALOG OUTPUT 2 8 2 8 RELAYS socero ente e e Heg er te dde eas 2 8 2 9 PANEL MOUNTING eite emen een rennen 2 9 3 uUn 3
7. When initialization is complete the instrument will begin its normal reading cycle and temperature or sensor units readings should appear on the display Messages will appear in the reading location on the display if the measurement input has not been fully configured Messages listed in Paragraph 5 3 1 Instrument Hardware Errors are related to the instrument hardware and may require help from Lake Shore service The messages listed in Paragraph 5 3 2 Limit Errors do not indicate a problem with the instrument and will disappear when input setup is complete The Model 211 should be allowed to warm up for a minimum of 30 minutes to achieve rated accuracy 3 2 DISPLAY DEFINITION The Model 211 has a 6 digit LED display capable of showing both numeric and character data In normal operation the display shows the current sensor reading in sensor units or temperature units The four annunciators below the right hand side of the display indicate what units the display is reading Other display configurations appear during parameter setting and data entry operations These displays are illustrated in their individual operation paragraphs Operation 3 1 Lake Shore Model 211 User s Manual LLL s Lake Shore 211 Temperature Monitor 211 Display eps Figure 3 1 Model 211 Display 3 8 LED ANNUNCIATORS AND DISPLAY MESSAGES The display units are indicated using LED annunciators below the right side of the main display
8. LOCK LOCK RDGST RELAY RELAY SRDG Function Page Identification Query sess 14 Reset Instrument Command sese Input Alarm Parameter Command Input Alarm Parameter Query eee Alarm Reset Status Command sss 15 Analog Output Parameter Command sss 15 Analog Output Parameter Query esee 15 Analog Output Data Query essere 15 Display Brightness Command sese 16 Display Brightness Query sees 16 Celsius Reading Query sess 16 Curve Delete Command snee ea eect eere 16 Curve Header Command sse 16 Curve Header Query Curve Data Point Command sese 17 Curve Data Point Query sse 17 Factory Defaults Command 18 Displayed Field Command eene 18 Displayed Field s 18 Display ON OFF Command esee 18 Display ON OFF Query 18 Fahrenheit Reading Query eese 18 Input Curve Number Command eee 19 Input Curve Number Query essere Input Type Parameter Command Input Type Parameter Query esee Keypad Status Quety essentiae ne thee 19 Kelvin Reading Query
9. Platinum 250 5 RTD INTYPE 0 term Sets input sensor type to silicon diode Input Type Parameter Query INTYPE term lt sensor type gt term n Refer to command for description Keypad Status Query KEYST term lt keypad status gt term n 1 key pressed 0 no key pressed Returns keypad status since the last KEYST KEYST returns 1 after initial power up 4 19 Lake Shore Model 211 User s Manual KRDG Input Returned Format Remarks LOCK Input Format Remarks Example LOCK Input Returned Format RDGST Input Returned Format Remarks 4 20 kelvin Reading Query KRDG term lt kelvin value gt term nnnnnn Also see the RDGST command Front Panel Keypad Lock Command LOCK lt state gt term n state 0 Unlocked 1 Locked Locks out all front panel entries Refer to Paragraph 3 10 LOCK 1 term Enables keypad lock Front Panel Keypad Lock Query LOCK term lt state gt term n Refer to command for description Input Reading Status Query RDGST term lt status bit weighting gt term nnn Integer returned represents sum of bit weighting of the input status flag bits 000 indicates a valid reading is present Bit Bit Weighting Status Indicator 1 2 A D not responding 2 4 Alarm low 3 8 Alarm high 4 16 Temperature under range 5 32 Temperature over range 6 64 Sensor units zero 7 128 Sensor units over r
10. User s Manual Model 211 Temperature Monitor Serial Numbers 21A0000 and Subsequent akeShore Lake Shore Cryotronics Inc 575 McCorkle Boulevard Westerville Ohio 43082 8888 USA E Mail Addresses sales lakeshore com service lakeshore com Visit Our Website www lakeshore com Fax 614 891 1392 Telephone 614 891 2243 Methods and apparatus disclosed and described herein have been developed solely on company funds of Lake Shore Cryotronics Inc No government or other contractual support or relationship whatsoever has existed which in any way affects or mitigates proprietary rights of Lake Shore Cryotronics Inc in these developments Methods and apparatus disclosed herein may be subject to U S Patents existing or applied for Lake Shore Cryotronics Inc reserves the right to add improve modify or withdraw functions design modifications or products at any time without notice Lake Shore shall not be liable for errors contained herein or for incidental or consequential damages in connection with furnishing performance or use of this material Rev 1 6 P N 119 043 02 March 2011 Lake Shore Model 211 User s Manual LIMITED WARRANTY STATEMENT WARRANTY PERIOD ONE 1 YEAR 1 Lake Shore warrants that this Lake Shore product the Product will be free from defects in materials and workmanship for the Warranty Period specified above the Warranty Period If Lake Shore receives notice of any such
11. nn Syntax of user bright Sets the display parameter input brightness Valid See Key below entries 0 15 0 least bright 15 most Definition of parameter bright Default 8 Commands may additionally include Remarks and Examples Command jpg Remote Operation 4 11 Lake Shore Model 211 User s Manual Serial Interface Command Summary Continued Brief description of query Query name Form of the query input BRIGT Display Brightness Query Input BRIGT lt input gt term Definition of Returned lt bright gt term returned parameter NN refer to command for description Syntax of returned parameter Query jpg Key Begins common interface command Required to identify queries aa String of alphanumeric characters mn String of number characters that may include a decimal point term Terminator characters gm Indicated a parameter field many are command specific state Parameter field with only On Off or Enable Disable states lt value gt Floating point values can have a varying resolution depending on the type of command or query issued 4 12 Remote Operation Lake Shore Model 211 User s Manual Table 4 4 Interface Commands Alphabetical Listing Command IDN RST ALARM ALARM ALMRST ANALOG ANALOG AOUT BRIGT BRIGT CRDG CRVDEL CRVHDR CRVHDR CRVPT CRVPT DFLT DISPFLD DISPFLD DISPON DISPON FRDG INCRV INCRV INTYPE INTYPE KEYST KRDG
12. R 3 TD out 3 TD out h 4 DTR out 6 DSR 6 DSR in lt 4 out 1 NC 7 RTS out 7 DTR tied to 4 8 CTS 8 NC 1 DCD in Model 211 to PC Serial Interface PC with DB 25P 211 DE 9p Standard NukModem Sable PCDB 25P 5 GND 7 GND 2 RD in lt TD out 3 TD out P 3 RD 1 NC a ee 4 RTS out 7 DTR tied to 4 d 5 CTS in 8 NC 8 DCD in 6 DSR in 4 20 DTR out 4 DTR out 6 DSR Model 211 to PC Interface using Null Modem Adapter Model 211 DE 9P Null Modem Adapter PC DE 9P 5 GND lt 5 GND 2 RD in Wer e DE UU 3 TD out 2 RD 1 NC 4 out 6 DSR 1 DCD in 4 DTR out 6 DSR in 7 tied to 4 8 CTS qM 5 9 NC 9 NC NOTE Same as null modem cable design except PC CTS is provided from the Model 211 on DTR 5 6 Service Lake Shore Model 211 User s Manual 5 6 CALIBRATION PROCEDURE The Model 211 requires calibration of both the sensor input and analog output to operate within the specification published in Paragraph 1 2 of this manual None of the other circuits require calibration Refer to Paragraph 5 6 4 for details on calibration specific interface commands WARNING Only qualified personnel should pe
13. The Model 211 has two relays labeled high and low The relays are most commonly associated with the alarm feature The relays can also be placed in manual mode and controlled directly by the user from the front panel or over the computer interface Refer to Paragraph 3 7 and the RELAY command in Chapter 4 Normally Open NO Normally Closed NC and Common COM contacts are available for each relay All contacts including common are isolated from the measurement and chassis grounds of the instrument If a relay is inactive Off it will be in its normal state of open or closed When the relay is active On it will be in the opposite state Relay connections are available on the Input Output connector See Figure 2 3 2 8 Installation Lake Shore Model 211 User s Manual 2 9 PANEL MOUNTING The Model 211 can be easily panel mounted using the panel mount brackets included The Model 211 fits in a 91 x 44 mm 3 6 x 1 7 in cutout To panel mount the instrument unplug the unit and use a 4s inch hex wrench to remove the two set screws holding the brackets in place Remove the two panel mount brackets by sliding them towards the rear of the unit Place the unit into the panel cutout Slide the two panel mount brackets back into the case of the instrument Reinstall the two set screws and tighten them until the instrument is secure The Model 211 can also be purchased with either of two panel mount adapters The Model 2111 or 2112 will
14. but they will be sent in response to a query A leading is not required but a leading is required 4 4 7 Trouble Shooting New Installation 1 Make sure transmit TD signal line from the instrument is routed to receive RD on the computer and vice versa Use a null modem adapter if not 2 Always send terminators 3 Sendentire message string at one time including terminators Many terminal emulation programs do not 4 10 Remote Operation Lake Shore Model 211 User s Manual Trouble Shooting Continued 4 Send only one simple command at a time until communication is established 5 Be sure to spell commands correctly and use proper syntax Old Installation No Longer Working 1 Power instrument off then on again to see if it is a soft failure 2 Power computer off then on again to see if communication port is locked up 3 Check all cable connections Intermittent Lockups 1 Check cable connections and length 2 Increase delay between all commands to 100 ms to make sure instrument is not being overloaded 3 Do not use the front panel keys during serial communication 4 2 SERIAL INTERFACE COMMAND SUMMARY This paragraph provides a summary of the Serial Interface Commands The Interface Commands are detailed in Paragraph 4 2 1 A list of all commands is provided in Table 4 4 Form of the command input Brief description of command Command name Display Brightness Command BRIGT lt bright gt term
15. s Manual 4 1 6 2 Program Operation Once the program is running try the following commands and observe the response of the instrument Input from the user is shown in bold and terminators are added by the program The word term indicates the required terminators included with the response ENTER COMMAND IDN Identification query Instrument will return a string identifying itself RESPONSE LSCI MODEL211 21A0000 022607 term ENTER COMMAND KRDG Kelvin reading query Instrument will return a string with the present kelvin reading RESPONSE 12 345 term ENTER COMMAND INTYPE 0 Input type command Instrument will change the input type to silicon diode No response will be sent ENTER COMMAND INTYPE Input type query Instrument will return a string with the present input type setting RESPONSE O term ENTER COMMAND INTYPE 0 INTYPE Input type command followed by input type query Instrument will change the input type to silicon diode then return a string with the present input type setting RESPONSE O term The following are additional notes on using the Serial Interface program If you enter a correctly spelled query without a nothing will be returned Incorrectly spelled commands and queries are ignored Commands and queries and should have a space separating the command and associated parameters Leading zeros and zeros following a decimal point are not needed in a command string
16. type Specifies the input sensor type Valid entries are 0 Silicon Diode or Analog Output Voltage Mode 1 GaAlAs Diode or Analog Output Current Mode 2 1000 Plat 250 3 1000 Plat 500 4 10000 Plat 5 NTC RTD lt value gt Gain calibration constant value Provides the gain calibration constant for the selected input or analog output Gain Calibration Constant Query CALG lt input gt lt type gt term lt mode gt lt range gt term n n lt input gt 1 or 2 lt type gt 0 5 lt value gt term n nnnnn Refer to command for description 6 Digit Input Reading Query CALREAD term value term nnnnnnn Returns 6 digit value of selected input reading Used for CALZ and CALG functions Service CALSAVE Input Remarks CALZ Input Format Remarks CALZ Input Format Returned Format Service Lake Shore Model 211 User s Manual Calibration Save Command CALSAVE term Finalizes the calibration procedure This command calculates and stores a checksum of the calibration memory This checksum is used on power up to determine if the instrument is calibrated properly If this command is not sent after a calibration the instrument will display an Err 03 on power up Refer to Paragraph 5 3 1 Zero Offset Calibration Constant Command CALZ lt input gt lt type gt lt value gt term n n Znnnnnnn input Specifies the input or analog output the zero offset calibration cons
17. 1 98 1 63516 23 109 0 0 970134 48 22 8 1 14495 73 1 74 1 63943 24 100 5 0 986073 49 22 0 1 16297 74 1 53 1 64261 25 93 5 0 998925 50 21 3 1 17651 75 1 40 1 64430 A 2 Curve Tables Curve Tables Lake Shore Model 211 User s Manual Table A 3 CTI Curve C Silicon Diode Breakpoint Temp K Volts 1 320 0 0 2968 2 305 0 0 3382 3 295 0 0 3640 4 285 0 0 3911 5 280 0 0 4050 6 270 0 0 4341 7 250 0 0 4896 8 195 0 0 6408 9 165 0 0 7255 10 140 0 0 7971 11 130 0 0 8245 12 125 0 0 8376 13 115 0 0 8625 14 110 0 0 8769 15 100 0 0 9049 16 95 0 0 9184 17 90 0 0 9314 18 85 0 0 9440 19 71 4 0 9626 20 65 0 0 9958 21 60 0 1 0100 22 36 0 1 0747 23 20 0 1 1162 24 19 0 1 1290 25 18 0 1 1500 26 14 0 1 3161 21 12 0 1 3656 28 11 0 1 3850 29 10 0 1 4000 A 3 Lake Shore Model 211 User s Manual Table A 4 Lake Shore PT 100 1000 Platinum RTD Curves Break PT 100 PT 1000 point Temp K Ohms Q Temp K Ohms Q 1 030 0 3 820 030 0 38 20 2 032 0 4 235 032 0 42 35 3 036 0 5 146 036 0 51 46 4 038 0 5 650 038 0 56 50 5 040 0 6 170 040 0 61 70 6 042 0 6 726 042 0 67 26 7 046 0 7 909 046 0 79 09 8 052 0 9 924 052 0 99 24 9 058 0 12 180 058 0 121 80 10 065 0 15 015 065 0 150 15 11 075 0 19 223 075 0 192 23 12 085 0 23 525 085 0 235 25 13 105 0 32 081 105 0 320 81 14 140 0 46 648 140 0 466 48 15 180 0 62 980 180 0 629 80 16 210 0 75 044 210 0 750 44 17 270 0
18. 1 stop Parity Odd Terminators CR ODH LF OAH Command Rate 20 commands per second maximum 4 1 4 Message Strings A message string is a group of characters assembled to perform an interface function There are three types of message strings commands queries and responses The computer issues command and query strings through user programs the instrument issues responses Two or more command or query strings can be chained together in one communication but they must be separated by a semi colon The total communication string must not exceed 64 characters in length Remote Operation 4 3 Lake Shore Model 211 User s Manual Message Strings Continued A command string is issued by the computer and instructs the instrument to perform a function or change a parameter setting The format is lt command mnemonic gt lt space gt lt parameter data gt lt terminators gt Command mnemonics are listed in Paragraph 4 2 Parameters necessary for each one are described in Paragraph 4 2 1 Terminators must be sent with every message string A query string is issued by the computer and instructs the instrument to send a response The query format is lt query mnemonic gt lt gt lt space gt lt parameter data gt lt terminators gt Query mnemonics are often the same as commands with the addition of a question mark Parameter data is often unnecessary when sending queries Query mnemonics are listed in Paragraph 4 2 Parameter da
19. 2 in mounting plate See Fig 2 5 2112 Panel mount adapter for two Model 211s into 105 mm wide x 132 mm high 4 1 x 5 2 in mounting plate See Fig 2 5 8000 CalCurve floppy disk Consists of a calibrated sensor breakpoint table on a floppy disk in ASCH format for customer download 8001 211 CalCurve factory installed Consists of a calibrated sensor breakpoint table factory installed into nonvolatile memory Calibration certificate CAL 211 CERT Instrument recalibration with certificate CAL 211 DATA Instrument recalibration with certificate and data MAN 211 User s manual Included with Model 211 Options amp Accessories 6 1 Lake Shore Model 211 User s Manual 6 3 WIRES Common cryogenic wire available from Lake Shore Other wire and installation accessories are also available P N Cable Description 9001 005 Quad Twist Cryogenic Wire Two twisted pairs phosphor bronze wire 36 AWG 0 127 mm 0 005 in diameter 9001 006 Duo Twist Cryogenic Wire Single twisted pair phosphor bronze wire 36 AWG 0 127 mm 0 005 in diameter 9001 007 Quad Lead Cryogenic Wire Phosphor bronze wire flat 32 AWG 0 203 mm 0 008 in diameter 9001 008 Quad Lead Cryogenic Wire Phosphor bronze wire flat 36 AWG 0 127 mm 0 005 in diameter 6 4 SENSORS Silicon diode sensors available from Lake Shore Other sensors are also available Sensor No Sensor
20. 4 Table A 1 Lake Shore DT 470 Silicon Diode Curve 10 Ba Tote a 1 475 0 0 09062 30 170 0 0 82405 59 031 0 1 10476 2 470 0 0 10191 31 160 0 0 84651 60 030 0 1 10702 3 465 0 0 11356 32 150 0 0 86874 61 029 0 1 10945 4 460 0 0 12547 33 145 0 0 87976 62 028 0 1 11212 5 455 0 0 13759 34 140 0 0 89072 63 027 0 1 11517 6 450 0 0 14985 35 135 0 0 90161 64 026 0 1 11896 7 445 0 0 16221 36 130 0 0 91243 65 025 0 1 12463 8 440 0 0 17464 37 125 0 0 92317 66 024 0 1 13598 9 435 0 0 18710 38 120 0 0 93383 67 023 0 1 15558 10 430 0 0 19961 39 115 0 0 94440 68 022 0 1 17705 11 420 0 0 22463 40 110 0 0 95487 69 021 0 1 19645 12 410 0 0 24964 41 105 0 0 96524 70 019 5 1 22321 13 400 0 0 27456 42 100 0 0 97550 71 017 0 1 26685 14 395 0 0 28701 43 095 0 0 98564 72 015 0 1 30404 15 380 0 0 32417 44 090 0 0 99565 73 013 5 1 33438 16 365 0 0 36111 45 085 0 1 00552 74 012 5 1 35642 17 345 0 0 41005 46 080 0 1 01525 75 011 5 1 38012 18 330 0 0 44647 47 075 0 1 02482 76 010 5 1 40605 19 325 0 0 45860 48 070 0 1 03425 77 009 5 1 43474 20 305 0 0 50691 49 065 0 1 04353 78 008 5 1 46684 21 300 0 0 51892 50 058 0 1 05630 79 007 5 1 50258 22 285 0 0 55494 51 052 0 1 06702 80 005 2 1 59075 23 265 0 0 60275 52 046 0 1 07750 81 004 2 1 62622 24 250 0 0 63842 53 040 0 1 08781 82 003 4 1 65156 25 235 0 0 67389 54 039 0 1 08953 83 002 6 1 67398 26 220 0 0 70909 55 036 0 1 09489 84 002 1 1 68585 27 205 0 0 74400 56 034 0 1 09864 85 001 7 1 69367 2
21. Equipment protected throughout by double insulation or reinforced insulation equivalent to Class II of IEC 536 see Annex H Caution High voltages danger of electric shock Background color Yellow Symbol and outline Black Caution or Warning See instrument documentation Background color Yellow Symbol and outline Black Fuse Introduction 1 9 Lake Shore Model 211 User s Manual This Page Intentionally Left Blank Introduction Lake Shore Model 211 User s Manual CHAPTER 2 INSTALLATION 2 0 GENERAL This chapter provides general installation instructions for the Model 211 Temperature Monitor To ensure the best possible performance and to maintain operator safety please read the entire chapter before installing and operating the instrument Refer to Chapter 3 for operating instructions Refer to Chapter 4 for computer interface installation and operation 2 4 INSPECTION AND UNPACKING Inspect shipping containers for external damage before opening Photograph any container that has significant damage before opening it If there is visible damage to the contents of the container contact the shipping company and Lake Shore immediately preferably within 5 days of receipt of goods Keep all damaged shipping materials and contents until instructed to either return or discard them Open the shipping container and keep the container and shipping materials until all contents have been accounted for Check off ea
22. Fahrenheit or sensor units V or Q The LEDs to the right of the keys indicate what units are being displayed To select display units continue from input curve selection Paragraph 3 5 2 or press the Select key use the A or Y key to select InPUt then press the Enter key three times The display shows UnitS and a LED shows the selected display units Use the A or Y key to cycle through the display units When the desired unit is highlighted press the Enter key 3 6 ALARM SETUP AND OPERATION The input of the Model 211 has high and low alarm capability Temperature reading data in kelvin can be compared to the alarm setpoint values A reading higher than the high setpoint or off the high end of the temperature curve triggers the high alarm and a reading lower than the low alarm setpoint or off the low end of the temperature curve triggers the low alarm NOTE Alarm setpoints are always set in K but the alarm feature will still operate if the instrument displays C or F If no temperature response curve is chosen the alarm function will not operate Refer to Paragraph 3 5 2 for curve selection If an alarm activates for the input the display flashes between the current reading and ALA K or ALA L for high and low alarms respectively The two relays can also be tied to alarm functions refer to Paragraph 3 7 Latching Alarms Often used to detect faults in a system or experiment that require operator interventio
23. LED Annunciators C The display units are in degrees Celsius K The display units are in kelvin F The display units are in degrees Fahrenheit V Q The display units are in sensor units either volts or ohms depending on input type Alarm messages are displayed alternately with the reading when an alarm condition exists If both a high and low alarm condition exists can only happen when latching alarms are active then the display will alternate between the current reading and the alarm high and alarm low messages Other display messages are described throughout this chapter Alarm Messages ALAK Indicates that the high alarm is active ALAL Indicates that the low alarm is active 3 2 Operation Lake Shore Model 211 User s Manual 3 4 KEYPAD DEFINITION The Model 211 has four keys on the front panel to setup instrument functions A list of front panel setup operations is shown in the Model 211 Menu Structure located on the inside back cover of this manual 3 4 1 Key Descriptions A The up arrow serves two functions to choose between parameters during setting operations and to increment numerical data Holding the button in while setting numerical data increases setting speed v The down arrow serves two functions to choose between parameters during setting operations and to decrement numerical data Holding the button in while setting numerical data increases setting speed Select Places the instrument into settings mode
24. O Off 1 On Remarks Turns display On or Off Display will default to On at power up or if any key is pressed even if the keypad is locked DISPON Display On Off Query Input DISPON term Returned state term Format n Refer to command for description FRDG Fahrenheit Reading Query Input FRDG term Returned temp value term Format nnnnnn Remarks Also see the RDGST command 4 18 Remote Operation Lake Shore Model 211 User s Manual INCRV Input Format Remarks Example INCRV Input Returned Format INTYPE Input Format Example INTYPE Input Returned Format KEYST Input Returned Format Remarks Remote Operation Input Curve Number Command INCRV lt curve number gt term nn lt curve number gt Specifies which curve the input uses If specified curve parameters do not match the input the curve number defaults to 0 Valid entries 0 none 1 20 standard curves 21 user curve Specifies curve the input uses for temperature conversion INCRV 21 term The input User Curve 21 for temperature conversion Input Curve Number Query INCRV term curve number gt term nn Refer to command for description Input Type Parameter Command INTYPE lt sensor type gt term n lt sensor type gt Specifies input sensor type Valid entries 0 Silicon Diode 3 100 Platinum 500 1 GaAlAs Diode 4 1000 Q Platinum 2 100
25. and pin 3 of the DCE connector holds the receive line so the functions complement It is likely both pieces of equipment are wired in the DTE configuration In this case pin 3 on one DTE connector used for transmit must be wired to pin 2 on the other used for receive Cables that swap the complementing lines are called null modem cables and must be used between two DTE wired devices Null modem adapters are also available for use with straight through cables Paragraph 5 5 1 illustrates suggested cables that can be used between the instrument and common computers The instrument uses drivers to generate the transmission voltage levels required by the RS 232C standard These voltages are considered safe under normal operating conditions because of their relatively low voltage and current limits The drivers are designed to work with cables up to 50 feet in length 4 1 2 Hardware Support The Model 211 interface hardware supports the following features Asynchronous timing is used for the individual bit data within a character This timing requires start and stop bits as part of each character so the transmitter and receiver can resynchronize between each character Half duplex transmission allows the instrument to be either a transmitter or a receiver of data but not at the same time The serial output supports a communication speed of 9600 baud Hardware handshaking is not supported by the instrument Handshaking is often used to guaran
26. defects during the Warranty Period and the Product is shipped freight prepaid Lake Shore will at its option either repair or replace the Product if it is so defective without charge to the owner for parts service labor or associated customary return shipping cost Any such replacement for the Product may be either new or equivalent in performance to new Replacement or repaired parts will be warranted for only the unexpired portion of the original warranty or 90 days whichever is greater 2 Lake Shore warrants the Product only if it has been sold by an authorized Lake Shore employee sales representative dealer or original equipment manufacturer OEM 3 The Product may contain remanufactured parts equivalent to new in performance or may have been subject to incidental use 4 The Warranty Period begins on the date of delivery of the Product or later on the date of installation of the Product if the Product is installed by Lake Shore provided that if you schedule or delay the Lake Shore installation for more than 30 days after delivery the Warranty Period begins on the 31st day after delivery 5 This limited warranty does not apply to defects in the Product resulting from a improper or inadequate maintenance repair or calibration b fuses software and non rechargeable batteries c software interfacing parts or other supplies not furnished by Lake Shore d unauthorized modification or misuse e operation outside of the published
27. gSend As Boolean Global used for Send button state Private Sub cmdSend Click Routine to handle Send button press gSend True Set Flag to True End Sub Private Sub Form Load Dim strReturn As String Dim strHold As String Dim Term As String Dim ZeroCount As Integer Dim strCommand As String Main code section Used to return response Temporary character space Terminators Counter used for Timing out Data string sent to instrument Show main window Terminators are lt CR gt lt LF gt Initialize counter Clear return string Clear holding string Close serial port to change settings frmSerial Show Term Chr 13 amp Chr 10 ZeroCount 0 strReturn strHold If frmSerial MSComm1 PortOpen True Then frmSerial MSComml PortOpen False End If frmSerial MSComml CommPort 1 Example of Comm 1 frmSerial MSComml Settings 9600 0 7 1 Baud Parity Data Stop frmSerial MSComml InputLen 1 Read one character at a time frmSerial MSComm1 PortOpen True Open port Do Do Wait loop DoEvents Give up processor to other events Loop Until gSend True gSend False strCommand frmSerial txtCommand Text nn strReturn strCommand UCase strCommand If strCommand EXIT Then End End If Loop until Send button pressed Set Flag as false Get Command Clear response display Set all characters to upper case Get out on EXIT Program cont
28. paragraph describes the connectors on the rear panel of the Model 211 See Figure 2 1 Readers are referred to paragraphs that contain installation instructions and connector pin outs for each feature A summary of connector pin outs is provided in Paragraph 5 5 CAUTION Only make rear panel connections with power supply disconnected SERIAL I O DTE Cc D RoHS COMPLIANT OVES 43 INPUT OUTPUT 4 a 211_Rear jpg Description Details POWER 5V DC Paragraph 2 3 Figure 5 1 SERIAL I O DTE DE 9 Paragraph 4 1 1 Figure 5 3 INPUT OUTPUT DB 25 Paragraph 2 6 1 Figure 5 2 Figure 2 1 Model 211 Rear Panel 2 3 POWER INPUT CONNECTOR Power is supplied to the Model 211 through a coaxial connector located on the rear panel of the instrument There is no power switch on the instrument so it is off when not plugged in or on when plugged in Make sensor connections before applying power to the instrument 2 2 Installation Lake Shore Model 211 User s Manual Power Input Connector Continued The instrument requires 5 VDC at 400 mA The coaxial connector accepts a barrel plug 5 5mm OD x 2 1mm ID x 9 9mm L Refer to Figure 2 2 for polarity WARNING To prevent electrical fire or shock hazards do not expose this instrument or its power supply to rain or excess moisture Oo Figure 2 2 Power Connector 2 4 EXTERNAL POWER SUPPLY The Model 211 comes with the universal input power supply
29. range being calibrated from Table 5 1 and accurately determine value of the resistor to the tolerance shown Attach the resistor standard to the 211 sensor input Be sure to connect the resistor using proper 4 lead connection techniques Via the interface obtain the input reading using the CALREAD command and record this number Program the gain calibration by dividing the actual resistance of the calibration resistor by the value read in the previous step and provide the result using the CALG command Note that the gain calibration constant will always be within 5 of 1 00000 Table 5 1 Calibration Table for Resistive Ranges Input Type Calibration Resistor Resistor Value Calibration Nominal Value Tolerance Command Type Number Silicon Diode 250 20 5 Q 0 GaAlAs Diode 250 20 5 Q 1 Platinum 250 Q 250 Q 0 027 Q 2 Platinum 500 500 Q 0 052 Q 3 Platinum 1000 5 KQ 1 03 0 4 NTC RTD 7 5 KQ 1 55 Q 5 Service 5 9 Lake Shore Model 211 User s Manual Input Gain Calibration Continued Example Input Type 100 platinum 250 Measured Value of Calibration Resistor 250 025 Q CALREAD Reading 250 145 Constant Calculation 250 025 250 145 0 99952 Calibration Command CALG 1 2 0 99952 10 Repeat for all input ranges 11 Send the CALSAVE command to finalize the calibration 5 6 3 Analog Output Calibration and Verification The 211 has one analog output which requires calibrat
30. specifications or f improper site preparation or maintenance 6 To the extent allowed by applicable law the above warranties are exclusive and no other warranty or condition whether written or oral is expressed or implied Lake shore specifically disclaims any implied warranties or conditions of merchantability satisfactory quality and or fitness for a particular purpose with respect to the product Some countries states or provinces do not allow limitations on an implied warranty so the above limitation or exclusion might not apply to you This warranty gives you specific legal rights and you might also have other rights that vary from country to country state to state or province to province 7 To the extent allowed by applicable law the remedies in this warranty statement are your sole and exclusive remedies 8 Except to the extent prohibited by applicable law in no event will lake shore or any of its subsidiaries affiliates or suppliers be liable for direct special incidental consequential or other damages including lost profit lost data or downtime costs arising out of the use inability to use or result of use of the product whether based in warranty contract tort or other legal theory and whether or not lake shore has been advised of the possibility of such damages Your use of the Product is entirely at your own risk Some countries states and provinces do not allow the exclusion of liability for incidental or consequenti
31. to calculate temperature between breakpoints From 2 to 200 breakpoints can be entered as a curve The instrument will show an error message on the display if the sensor input is outside the range of the breakpoints No special endpoints are required Sensor units are defined by the format setting in Table 3 7 Breakpoint setting resolution is six digits in temperature Most temperature values are entered with 0 001 resolution Temperature values of 1000 K and greater can be entered to 0 01 resolution Temperature values below 10 K can be entered with 0 0001 resolution Temperature range for curve entry is 1500 K Setting resolution is also 6 digits in sensor units The curve format parameter defines the range and resolution in sensor units as shown in Table 3 7 The sensor type determines the practical setting resolution Table 3 7 lists recommended sensor units resolutions For most sensors additional resolution is ignored The breakpoints should be entered with the sensor units value increasing as point number increases There should not be any breakpoint locations left blank in the middle of a curve The search routine in the Model 211 interprets a blank breakpoint as the end of the curve Table 3 7 Recommended Curve Parameters Typical Type piu Unit Format pis Coefficient issues uu Silicon Diode DT 470 V VIK 475 Negative 0 00001 V GaAlAs Diode TG 120 V VIK 325 Negative 0
32. where all instrument parameters can be setup When pressed while in the settings mode it terminates the settings mode without changing the existing parameter value Press and hold to display code revision date Enter Completes setting function storing any changes to the parameter value Press and hold to lock or unlock the keypad 3 4 2 General Keypad Operation The Model 211 has two keypad operations setting selection and data entry Setting Selection Allows the user to select from a finite list of parameter values During setting selection the A and W keys are used to select a parameter value Enter is used to accept the change and advance to the next parameter Select will cancel the change to that parameter and return to the normal display Data Entry Allows the user to enter numeric parameter values using the A and Y keys Press the A key to increase the value of the setting or press the W key to decrease its value Holding either key down for a few seconds will cause the number to change at a faster rate Once the correct parameter value is entered press Enter to accept the change and advance to next parameter Pressing Select will cancel the change to that parameter and return to the normal display Related setting selection and data entry sequences are often chained together under a single setting sequence To skip over a parameter without changing its value press Enter before pressing an arrow key To return to the normal displ
33. 00001 V Platinum 100 PT 100 Q 800 Positive 0 001 Q Platinum 1000 PT 100 Q QIK 800 Positive 0 01 Q Rhodium lron RF 100 Q QIK 325 Positive 0 001 Q Carbon Glass CGR 1 1000 logQ K 325 Negative 0 00001 1090 Cernox CX 1030 logQ K 325 Negative 0 00001 1090 Germanium GR 200A 100 logQ K 325 Negative 0 00001 logo RX 102A Q logQiK 40 Negative 0 00001 1090 3 12 Operation Lake Shore Model 211 User s Manual CHAPTER 4 REMOTE OPERATION 4 0 GENERAL The Model 211 is equipped with an RS 232C serial computer interface The interface allows computer automation of instrument setup and temperature measurement data collection Nearly every feature of the instrument can be accessed through the computer interface Interface capabilities including setup information and example programs are provided in Paragraph 4 1 Interface commands including a command summary are described in Paragraph 4 2 4 34 SERIAL INTERFACE OVERVIEW The serial interface used in the Model 211 is commonly referred to as an RS 232C interface RS 232C is a standard of the Electronics Industries Association EIA that describes one of the most common interfaces between computers and electronic equipment The RS 232C standard is quite flexible and allows many different configurations However any two devices claiming RS 232C compatibility cannot necessarily be plugged together without interface setu
34. 1 3 0 GENERAL une IURE RO URP 3 1 3 1 INSTRUMENT POWER eere emnes 3 1 3 2 DISPLAY DEFINITION F ec cee e sesoonse e isoin 3 1 3 3 LED ANNUNCIATORS and DISPLAY MESSAGES 3 2 3 4 KEYPAD DEFINITION eere eene 3 3 Key D scriptions eire nia unteren 3 3 3 4 20 General Keypad Operation sse 3 3 3 INPUT SETUP E ORO eee 3 4 Seek Input Type ione eene eei ehe een 3 4 325 2 Curve Selections ios ere ehe 3 5 3 5 3 Display Units Selection sssini netsesa eskeini pesee 3 6 3 6 ALARM SETUP and OPERATION eee 3 6 3 4 RELAY SETUP a sns ien e ie en pee 3 7 Table of Contents 1 Lake Shore Model 211 User s Manual TABLE OF CONTENTS continued Chapter Paragraph Title Page 3 8 ANALOG OUTPUT SETUP esee 3 8 3 9 ANALOG OUTPUT TO TEMPERATURE CONVERSION 3 9 3 10 LOCKING AND UNLOCKING THE KEYPAD 3 10 3 11 RESETTING THE MODEL 211 TO DEFAULT VALUES 3 10 3 12 CHECKING CODE DATE 3 10 3 13 CURVE ENTRY AND STORAGE eee 3 11 3 13 1 Curve Header Parameters assis 3 11 3 132 Curve Breakpoints 5 tete eget 3 12 4 REMOTE OPERA TION 4 1 40 ete 4 1 4 1 SERIAL INTERFACE 4
35. 1 4 1 1 Physical Connection 4 1 4 1 2 Hardware Support sesssssseseseeeenreneneeneeeeeen 4 2 4 1 3 Character Format oeeie eene 4 3 AVA Message Strings see eere re Re err ten 4 3 4 1 5 Message Flow Control eee 4 4 4 1 6 Serial Interface Basic Program esee 4 5 4 1 6 1 Visual Basic Serial Interface Program Setup 4 5 4 1 6 2 Program Operation 4 10 4 1 7 Trouble Shooting annassa 4 10 4 2 SERIAL INTERFACE COMMAND SUMMARY 4 11 4 2 1 Interface Commands In Alphabetical Order 4 14 5 SERVICE 5 1 5 0 GENERAL nien HO Rb e sarees osea 5 1 5 1 CONTACTING LAKE SHORE eee 5 1 52 RETURNING PRODUCTS TO LAKE SHORE 5 2 5 3 ERROR MESSAGES Saa essere ener nennen enne 5 2 5 3 1 Instrument Hardware Errors sss 5 2 5 32 Eaxmit eee Ure eU eet aul 5 3 5 4 OPENING THE ENCLOSURE m 5 3 5 5 CONNECTOR DEFINITIONS eee 5 4 5 5 1 Serial Interface Cable Wiring see 5 6 5 6 CALIBRATION PROCEDURE e 5 7 5 6 1 Equipment Required for Calibration 5 7 5 6 2 Diode Resistor Sensor Input Calibration 5 7 5 6 2 1 Sensor Input Calibration Setup and Seri
36. 4 2 267 mK at 77 K 21 mK at 10K 390 mK at 77 K CalCurve and calibrated 154 mK at 300 K 140 mK at 300 K sensor 140 mK at 500 K 210 mK at 475 K Magnetic Field Use Recommended for Recommended for T gt 60K amp B lt 3T T gt 42K amp B lt 5T 1 6 Introduction Lake Shore Model 211 User s Manual Table 1 2 Sensor Input Performance Chart Continued 100 Q Platinum RTD 500 Q Full Scale 1000 Platinum RTD Cernox RTD Positive Positive Negative ohms Q ohms Q ohms Q 0 5009 0 5000 Q 0 7500 Q 1 mA 40 3 1 mA 40 3 10 pA 0 01 10 mQ 100 mQ 100 mQ PT 103 with PT 1001 CX 1050 SD 14J calibration with 1 4J calibration with 4L calibration 30 800 K 30 800 K 3 5 400 K DIN 43760 Scaled from DIN 43670 Requires calibration 0 19 O K at 30 K 0 42 O K at 77 K 1 9 O K at 30K 4 2 O K at 77 K 770 Q K at 4 2 1 5 O K at 77 K 0 39 Q K at 300 K 3 9 O K at 300 K 0 1 O K at 300 K 0 35 O K at 675 K 3 3 O K at 800 K 0 33 Q K at 800 K 2 mQ 20 mQ 50 mQ 10 6 mK at 30 K 10 6 mK at 30 K 1 mKat42K 10 mK at 77 K 10 mK at 77 K 33 3 mK at 77 K 10 mK at 300 K 10 mK at 300 K 500 mK at 300 K 10 mK at 675 K 10 mK at 800 K 10 mK at 800 K 0 004 Q 0 02 rdg 0 06 0 04 rdg 0 1 40 04 rdg 25 mK at 30 K 40 mK at 30 K 1 mK at 4 2 K 18 mK at 77 K 70 mK at 300 K 162 mK at 675 K 187 mK at 800 K 33 mK at 77 K 135 mK at 300 K 370
37. 8 190 0 0 77857 aT 033 0 1 10060 86 001 4 1 69818 29 180 0 0 80139 58 032 0 1 10263 Curve Tables 1 Lake Shore Model 211 User s Manual Table A 2 Lake Shore DT 670 Silicon Diode eo s Volts pios bus Volts cen Volts 1 500 0 0 090570 26 87 0 1 01064 51 20 2 1 19475 2 491 0 0 110239 27 81 0 1 02125 52 17 10 1 24208 3 479 5 0 136555 28 75 0 1 03167 53 15 90 1 26122 4 461 5 0 179181 29 69 0 1 04189 54 14 90 1 27811 5 425 5 0 265393 30 63 0 1 05192 55 14 00 1 29430 6 390 0 0 349522 31 56 4 1 06277 56 13 15 1 31070 7 346 0 0 452797 32 49 0 1 07472 57 12 35 1 32727 8 320 0 0 513393 33 38 7 1 09110 58 11 55 1 34506 9 298 5 0 563128 34 35 7 1 09602 59 10 75 1 36423 10 279 0 0 607845 35 33 3 1 10014 60 10 00 1 38361 11 261 0 0 648723 36 31 2 1 10393 61 9 25 1 40454 12 244 0 0 686936 37 29 6 1 10702 62 8 50 1 42732 13 228 0 0 722511 38 28 3 1 10974 63 7 15 1 45206 14 213 0 0 755487 39 27 3 1 11204 64 6 80 1 48578 15 198 5 0 786992 40 26 5 1 11414 65 5 46 1 53523 16 184 5 0 817025 41 25 8 1 11628 66 4 56 1 56684 17 171 5 0 844538 42 25 2 1 11853 67 4 04 1 58358 18 159 5 0 869583 43 24 7 1 12090 68 3 58 1 59690 19 148 0 0 893230 44 24 3 1 12340 69 3 18 1 60756 20 137 5 0 914469 45 24 0 1 12589 70 2 62 1 62125 21 127 5 0 934356 46 23 7 1 12913 71 2 26 1 62945 22 118 0 0 952903 47 23 3 1 13494 72
38. 98 784 270 0 987 84 18 315 0 116 270 315 0 1162 70 19 355 0 131 616 355 0 1316 16 20 400 0 148 652 400 0 1486 52 21 445 0 165 466 445 0 1654 66 22 490 0 182 035 490 0 1820 35 23 535 0 198 386 535 0 1983 86 24 585 0 216 256 585 0 2162 56 25 630 0 232 106 630 0 2321 06 26 675 0 247 712 675 0 2477 12 27 715 0 261 391 715 0 2613 91 28 760 0 276 566 760 0 2765 66 29 800 0 289 830 800 0 2898 30 A 4 Curve Tables Lake Shore Model 211 User s Manual APPENDIX B REGULATORY DECLARATIONS B1 0 GENERAL Declarations in this appendix apply to the Lake Shore Cryotronics Model 211 Temperature Controller beginning with serial number 21 A0000 and subsequent as well as its power supply Paragraphs B1 1 and B1 2 refer to the CE and RoHS declarations respectively for the Model 211 alone Paragraphs B1 3 and B1 6 refer to the CE and RoHS declarations respectively for the unit s power supply The declarations included are as follows CE declaration for the Model 211 RoHS declaration for the Model 211 CE declaration for the power supply P N 109 132 RoHS declaration for the power supply P N 109 132 CE and RoHS declarations for discontinued power supplies Regulatory Declarations A 5 Lake Shore Model 211 User s Manual B1 1 MODEL 211 CE DECLARATION OF CONFORMITY C DECLARATION OF CONFORMITY Lake Shore Cryotronics Inc 575 McCorkle Blvd Westerville OH 43082 8888 USA hereby declare that the equipment specified co
39. 999 99 0 1 above 1000 Sensor Units Display Resolution Sensor dependent to 5 digits Display Annunciators K C F V Q Keys Select Enter A Up Arrow Y Down Arrow Front Panel Features Display Units Display Brightness Keypad Lockout Instrument Reset Interface Serial Interface Format RS 232C Baud Rate 9600 baud Reading Rate To 7 rdg s Special Features User Curve Entry LabView Driver Connector DE 9 Alarms Number 2 High and Low Settings High Setpoint Low Setpoint Dead band Latching or Non Latching Alarm On Off Actuators Display message relays Introduction 1 3 Lake Shore Model 211 User s Manual Interface Continued Relays Number 2 Contacts Normally Open NO Normally Closed NC and Common C Contact Rating 30 VDC at 1 A Settings manually off manually on follows alarms Connector DB 25 shares input connector Analog Output Isolation Output is not isolated from chassis ground Update Rate 7 rdg s Voltage Current Range 0 10 V 4 20 mA Resolution 0 15 mV 0 3 pA Accuracy 1 25 mV 5 0 uA Minimum Load Resistance ee d NA Compliance Voltage NA 10V Load Regulation NA 0 02 rdg 0 to 500 Q Scales Temperature Sensor Units Fixed by type 0 20K Diodes 1 V IV 0 100K 100 Q Platinum 1 V 100 Q 0 200 K 1000 Platinum 1 V 1000 Q 0 325 K NTC Resistor 1 V 1000 Q 0 475 K 0 1000 K Settings Voltage or current
40. Accurately determine the value of the 1 kQ resistor using the DMM Determine the verification value by multiplying the actual resistance of the 1 KQ resistor by 1 x 10 9 Attach the 1 KO resistor to the 211 input using proper 4 lead connection techniques configure the DMM to read VDC and attach to the resistor 10 Measure voltage across resistor and verify it is within 0 3 of the value calculated in Step 8 5 6 2 3 Input Gain Calibration Purpose To determine the input offset and gain errors when the input is configured for each of the input types and provide offset and gain calibration constants back to the 211 Refer to CALZ and CALG commands in Paragraph 5 6 4 Process 1 Configure the input for the type to be calibrated 5 8 Service Lake Shore Model 211 User s Manual Input Gain Calibration Continued 2 p Reset the calibration constants to their default values using the CALZ and CALG commands Example Input Type GaAlAs Diode Zero Offset Reset Command CALZ 1 1 0 Gain Reset Command CALG 1 1 1 Attach the 0 Q short resistor standard to the input Via the interface obtain the input reading using the CALREAD command and record this number Program the offset calibration by providing the inverse of the value read in the previous step using the CALZ command Example Input Type GaAlAs Diode CALREAD Reading 0 00005 Calibration Command CALZ 1 1 0 00005 Select resistor standard for the
41. Deadband OK Display Brightness 8 3 12 CHECKING CODE DATE REVISION To check revision date of the firmware code press and hold the Select key until the display shows the code date It is in the format of MMDDYY where MM is the month DD is the day and YY is the year of the code Release the key and the display returns to normal operation 3 10 Operation Lake Shore Model 211 User s Manual 3 13 CURVE ENTRY AND STORAGE The Model 211 has standard curve locations numbered 1 through 20 At present not all locations are occupied by curves the others are reserved for future updates Standard curves cannot be changed by the user and reserved locations are not available for user curves The Model 211 has one user curve location The user curve can only be entered using the serial interface Refer to Paragraph 4 2 for the serial interface curve commands The user curve location can hold from 2 to 200 data pairs breakpoints including a value in sensor units and a corresponding value in kelvin 3 13 1 Curve Header Parameters Each curve has a set of parameters that are used for identification and to allow the instrument to use the curve effectively The parameters must be set correctly before a curve can be used for temperature conversion Curve Number 21 Location 21 is for the user curve Name Up to a 15 character name can be entered Serial Number Up to a 10 character sensor serial number consisting of both numbers an
42. Description The smallest silicon diode Temperature Sensor available For Series DT 420 installation on flat surfaces Sensor incorporates the same type of silicon chip used in the Series DT 470 and DT 471 Silicon Diode Miniature Temperature Sensor Same silicon Series DT 450 chip used in the DT 470 configured for installation in recesses as small as 1 6 mm diameter by 3 2 mm deep Series DT 470 Silicon Diode Temperature Sensor Interchangeable f repeatable accurate wide range customized for cryogenics An economical version of the DT 470 for applications where temperature measurements below 10 K are not required Series DT 471 Lake Shore DT 670 diode temperature sensors offer the best accuracy across the widest useful temperature range 1 4 to Series DT 670 500 K of any silicon diode sensor in the industry Sensors within the DT 670 series are interchangeable to the Curve DT 670 6 2 Options amp Accessories Lake Shore Model 211 User s Manual APPENDIX A CURVE TABLES A1 0 GENERAL The following curve tables are applicable to the Model 211 temperature monitor Curve DT 470 Silicon Diode Table A 1 Curve 2 DT 670 Silicon Diode Table A 2 Curve 3 CTI Curve C Silicon Diode Table A 3 Curve 6 PT 100 Platinum RTD cen Table A 4 Curve 7 PT 1000 Platinum RTD Table A
43. Lake Shore P N 109 132 It can accept input voltages from 100 to 240 VAC 10 50 to 60 Hz For input power it has interchangeable plugs to accommodate power receptacles in different countries It has a barrel plug for the output It can output 5 V at 0 to 1 2 A The power supply is CE certified and meets or exceeds the following safety standards UL 60950 1 and EN 60950 To change plugs press the pad on the side of the plug pull off the old plug and snap in the new plug 2 5 CABLE CLAMP To avoid inadvertent disconnection from the power supply Lake Shore supplies a cable clamp that the user may attach to the cord and the instrument chassis It is a part of the accessories kit supplied with the unit To install the clamp remove the screw at the top left rear of the unit position the cord and clamp as shown in the photo and reinstall the screw 2 6 SENSOR INPUT This paragraph details how to connect diode and resistor sensors to the Model 211 input Refer to Paragraph 3 5 to configure the input Sensor installation instructions are provided in the Lake Shore Temperature Measurement and Control Catalog Installation 2 3 Lake Shore Model 211 User s Manual 2 6 1 Input Output Connector Sensors are connected to the Model 211 through the Input Output connector on the rear panel of the instrument The Input Output connector is also used for the analog output and relay connections Refer to Figure 2 3 for pin descriptions Inpu
44. N 109 132 A 9 B1 5 CE Declarations for Discontinued Power Supplies A 10 B1 6 RoHS Declarations for Discontinued Power Supplies A 12 Appendix C MENU STRUCTURE cccssssssssessesesserseseesersevees A 13 Table of Contents ili Lake Shore Model 211 User s Manual LIST OF ILLUSTRATIONS Figure No Title Page Figure 1 1 Model 211 Front Panel 1 1 Figure 2 1 Model 211 Rear Panel 2 2 Figure 2 2 Power Connector sese 2 3 Figure 2 3 Input Output Connector 2 4 Figure 2 4 Panel Mounting Details esee 2 9 Figure 2 5 2111 and 2112 Panel Mount Adapters 2 10 Figure 3 1 Model 211 Display serene 3 2 Figure 5 1 Power 1 5 4 Figure 5 2 Input Output Connector essen 5 4 Figure 5 3 RS 232 DTE Connector 5 5 LIST OF TABLES Table No Title Page Table 1 1 Temperature Range of Typical Lake Shore Sensors 1 2 Table 1 2 Sensor Input Performance Chart esses 1 6 Table 3 1 Sensor Input Types esee 3 4 Table 3 2 Standard Curves sse 3 5 Table 3 3 Analog Output Range Scales
45. Setup and Serial Communication Verification 1 Allow the 211 to warm up for at least 1 hour with the input configured for Silicon diode and a 250 kQ resistor standard attached to the input Connect the 211 to the PC via the serial port 3 Verify operation of serial communication by sending the IDN command and receiving the proper response from the 211 Service 5 7 Lake Shore Model 211 User s Manual 5 6 2 2 10 uA Current Source Calibration and 1 mA Current Source Verification Purpose To calibrate the 10 uA current source to be within the specified tolerance and verify operation of the 1 mA current source Process 1 Configure the input for the silicon diode input type 2 Accurately determine the value of the 250 resistor using the DMM Determine the calibration value by multiplying the actual resistance of the 250 kQ resistor by 10 x 10 3 Attach the 250 kQ resistor to the 211 input using proper 4 lead connection techniques configure the DMM to read VDC and attach across the voltage terminals of the resistor 4 Remove the four screws on the rear panel of the instrument Slide the PC board assembly out enough to expose R9 5 Adjust the current source calibration pot R9 on the 211 main board until the DMM reads the value calculated in Step 2 to 0 0002 VDC 6 Slide the PC board back into the enclosure and replace the four screws on the rear panel 7 Configure the input for the 1 kO platinum input type
46. air or replacement an RGA number must be obtained from a factory representative or from the Lake Shore web site Do not return a product to Lake Shore without an RGA number The following information must be provided to Lake Shore in order to obtain an RGA number 1 Instrument model and serial number 2 User name company address phone number and e mail address 3 Malfunction symptoms 4 Description of the system in which the product is used If possible the original packing material should be retained for reshipment If not available a minimum of three inches of shock adsorbent packing material should be placed snugly on all sides of the instrument in a sturdy corrugated cardboard box Include the RGA number on the mailing label or written prominently on the outside of the box Include a copy of the customer contact information and RGA number inside the box Consult Lake Shore with questions regarding shipping and packing instructions 5 3 ERROR MESSAGES The following messages appear on the instrument display when it identifies a problem during operation The messages are divided into two groups Instrument hardware messages are related to the instruments internal circuits or non volatile memory If one of these messages persists after power is cycled the instrument requires repair or recalibration Limit messages are most often associated with over voltage conditions caused by an improperly selected range or excessive noise on the m
47. al damages so the above limitation may not apply to you 9 Except to the extent allowed by applicable law the terms of this limited warranty statement do not exclude restrict or modify and are in addition to the mandatory statutory rights applicable to the sale of the product to you CERTIFICATION Lake Shore certifies that this product has been inspected and tested in accordance with its published specifications and that this product met its published specifications at the time of shipment The accuracy and calibration of this product at the time of shipment are traceable to the United States National Institute of Standards and Technology NIST formerly known as the National Bureau of Standards NBS or to a recognized natural standard TRADEMARK ACKNOWLEDGEMENT Manufacturers and sellers claim many designations as trademarks to distinguish their products Where those designations appear in this manual and Lake Shore was aware of a trademark claim the designations appear in initial capital letters with a or symbol CalCurve Cernox Duo Twist Quad Lead Quad Twist Rox and SoftCal are trademarks of Lake Shore Cryotronics Inc Copyright 2002 2005 2011 by Lake Shore Cryotronics Inc All rights reserved No portion of this manual may be reproduced stored in a retrieval system or transmitted in any form or by any means electronic mechanical photocopying recording or otherwise without the expres
48. al Communication Verica Oi ue eet e tee nies 5 7 ii Table of Contents Lake Shore Model 211 User s Manual TABLE OF CONTENTS continued Chapter Paragraph Title Page 5 6 2 2 10 uA Current Source Calibration and 1 mA Current Source bdsm 5 8 5 6 23 Input Gain Calibration esee 5 8 5 6 3 Analog Output Calibration and 5 10 5 6 3 1 Analog Output Voltage Mode Calibration 5 10 5 6 3 2 Analog Output Current Mode Calibration 5 11 5 6 4 Calibration Specific Interface Commands 5 13 6 OPTIONS AND ACCESSORIES 6 1 6 0 GENERAL ipte eire POR ren e ERR sues 6 1 6 1 MODELS rore cep eei RHENO 6 1 6 2 ACCESSORIES intet prre Eee 6 1 6 37 WIRES RO 6 2 6 4 SENSORS wis 6 2 Appendix A CURVE TABLEEG scccsccosssssssssssecsssssessverssesssessonses A 1 ALO GEN RA 5 ete eee n eed 1 Appendix REGULATORY DECLARATIONS A 5 BLO General henu u an ERR Ree teo pee deed A 5 B1 1 Model 211 CE Declaration of Conformity A 6 B1 2 Model 211 RoHS Declaration of A 7 B1 3 Power Supply CE Declaration P N 109 132 A 8 B1 4 Power Supply RoHS Declaration P
49. alibration with certificate CAL 211 DATA Instrument recalibration with certificate and data Introduction 1 5 Lake Shore Model 211 User s Manual Table 1 2 Sensor Input Performance Chart Sensor Type Silicon Diode GaAlAs Diode Temperature Coefficient Negative Negative Sensor Units volts V volts V Input Range 0 2 5V 0 7 5V Sensor Excitation Constant Current 10 uA 0 01 10 uA 0 01 Display Resolution Sensor Units 100 uV 100 uV DT 670 SD TG 120SD Example Lake Shore Sensor Jit 4H calibration with 1 4H calibration Temperature Range 14 475 14 475 Standard Sensor Curve DT 670 Requires calibration Typical Sensor Sensitivity 31 6 mV K at 4 2 K 1 73 mV K at 77 K 2 3 mV K at 300 K 2 12 mV K at 500 K 180 mV K at 10K 1 25 mV K at 77 K 2 75 mV K at 300 K 2 75 mV K at 475 K Measurement Resolution Sensor Units 20 uV 20 uV Temperature Equivalence 0 6 mK at 4 2 K 1 mKat 10 K 11 6 mK at 77 K 16 mK at 77 K 8 7 mK at 300 10 mK at 300 K 9 4 mK at 500 K 10 mK at 475 K Electronic Accuracy Sensor Units 160 uV 0 01 rdg 160 uV 0 02 rdg Temperature Equivalence 10 mK at 4 2 K 6 mK at 10 K 152 mK at 77 K 300 mK at 77 K 94 mK at 300 K 150 mK at 300 K 80 mK at 500 K 110 mK at 475 K Temperature Coefficient 10 pV 5 PPM 20 uV 5 PPM of reading per C of reading per C Temperature Accuracy including electronic accuracy 31 mK at
50. ange Remote Operation RELAY Input Format Example RELAY Input Format Returned SRDG Input Returned Format Remarks Lake Shore Model 211 User s Manual Relay Control Parameter Command RELAY lt relay number gt lt mode gt term n n lt relay number gt Specifies which relay to configure 1 low alarm relay 2 high alarm relay lt mode gt Specifies relay mode 0 Off 1 On 2 Alarms RELAY 1 2 term Low alarm relay activates when low alarm activates Relay Control Parameter Query RELAY lt relay number gt term n relay number Specifies which relay to query 1 low alarm relay 2 high alarm relay n Refer to command for description Sensor Units Input Reading Query SRDG term lt sensor units value gt term nnnnnn Also see the RDGST command Remote Operation 4 21 Lake Shore Model 211 User s Manual This Page Intentionally Left Blank 4 22 Remote Operation Lake Shore Model 211 User s Manual CHAPTER 5 SERVICE 5 0 GENERAL This chapter provides basic service information for the Model 211 Temperature Monitor Customer service of the product is limited to the information presented in this chapter Factory trained service personnel should be consulted if the instrument requires repair 5 1 CONTACTING LAKE SHORE If a Lake Shore product was purchased through a dealer or representative please use that resource for prompt sales or service in
51. ay in the middle of a setting sequence press Select before pressing an arrow key Changes entered before Select is pressed are kept Operation 3 3 Lake Shore Model 211 User s Manual 3 5 INPUT SETUP 3 5 1 Input Type The Model 211 supports a variety of temperature sensors sold by Lake Shore and other manufactures An appropriate sensor type must be selected for the input Refer to Table 3 1 for a list of common sensor types If a particular sensor is not listed in the Input Type selection look at Table 3 1 to find a sensor with similar range and excitation For additional details on sensors refer to the Lake Shore Temperature Measurement and Control Catalog or visit our website at www lakeshore com To select sensor type press the Select key use the A or Y keys to select InPUt then press the Enter key Use the A or Y keys to cycle through the sensor types shown in Table 3 1 When the desired type appears press the Enter key Proceed to Paragraph 3 5 2 to select a temperature curve or press the Select key to return to the normal display Table 3 1 Sensor Input Types Display Input Excit Sensor Curve Coef Lake Shore Form M Message Type ation Type at ficient Sensors A DT 470 Si 2 5 V 10 Silicon Diode V K Neg DT 670 Gallium ME 75 V l0uA Aluminum V K Neg TG 120 Series Arsenide Diode 100 Q Platinum 250Pt 2500 1ma RID lt 675 K PT 100 Series Rhodium Iron Pos Platinum RTD
52. ay pose a hazard to the operator and surrounding area The power supply included with the Model 211 meets or exceeds the European Union Standard EN 60950 Do Not Operate in an Explosive Atmosphere Do not operate the instrument in the presence of flammable gases or fumes Operation of any electrical instrument in such an environment constitutes a definite safety hazard Keep Away from Live Circuits Operating personnel must not remove instrument covers Refer component replacement and internal adjustments to qualified maintenance personnel Do not replace components with power cable connected To avoid injuries always disconnect power and discharge circuits before touching them Do Not Substitute Parts or Modify Instrument Do not install substitute parts or perform any unauthorized modification to the instrument Return the instrument to an authorized Lake Shore Cryotronics representative for service and repair to ensure that safety features are maintained Cleaning Do not submerge instrument Clean only with a damp cloth and mild detergent exterior only 1 8 Introduction 1 4 I P P BHO reOwv 9ge Lake Shore Model 211 User s Manual SAFETY SYMBOLS Direct current power line Alternating current power line Alternating or direct current power line Three phase alternating current power line Earth ground terminal Protective conductor terminal Frame or chassis terminal On supply Off supply
53. cale 30 800 K Rhodium Iron RTD RF 800 4 1 4 400 K Negative Temperature Coefficient NTC RTDs Germanium RTD GR 200A 1000 2 100K Germanium RTD GR 200A 250 12 40K Carbon Glass RTD CGR 1 500 3 325K Cernox RTD CX 1050 AA or SD 3 5 325 K Cernox RTD CX 1030 AA or SD 2 325 K High Temperature Cernox RTD CX 1030 SD HT 2 420K Rox Ruthenium Oxide RTD RX 102A 2 40K Rox Ruthenium Oxide RTD RX 202A 3 40K Sensors sold separately t Single excitation current may limit the low temperature range of NTC resistors 1 2 Introduction Lake Shore Model 211 User s Manual 1 2 SPECIFICATIONS Thermometry Number of Inputs 1 Measurement Type 4 lead differential Excitation Constant current 10 uA or 1 mA Isolation Measurement is not isolated from chassis ground A D Resolution 24 bit Input Accuracy Sensor dependent refer to Table 1 2 Measurement Resolution Sensor dependent refer to Table 1 2 Maximum Update Rate 7 rdg s Supported Sensors Diodes Silicon GaAlAs RTDs 100 Q Platinum 1000 Q Platinum Cernox Carbon Glass Rox Standard Curves DT 470 DT 670 CTI Curve C PT 100 PT 1000 User Curve One 200 point CalCurve or user curve in non volatile memory Settings Sensor Type Sensor Curve Input Connector DB 25 Front Panel Display Type 5 digit LED Display Units K C F V Q Display Update Rate 2 rdg s Temperature Display Resolution 0 001 between 0 99 999 0 01 between 100
54. ch item on the packing list as it is unpacked Instruments may be shipped as several parts The items included with the Model 211 are listed as follows Items Included with Model 211 Temperature Monitor Model 211 Instrument Model 211 User s Manual Input Output Mating Connector and Shell Panel Mount Hardware Installed at Factory Universal Input Power Supply interchangeable plug style Cable Clamp Rubber Feet Contact Lake Shore immediately if there is a shortage of parts or accessories Lake Shore is not responsible for any missing items if not notified within 60 days of shipment Inspect all items for both visible and hidden damage that occurred during shipment If damage is found contact Lake Shore immediately for instructions on how to file a proper insurance claim Lake Shore products are insured against damage during shipment but a timely claim must be filed before Lake Shore will take further action Procedures vary slightly with shipping companies Keep all shipping materials and damaged contents until instructed to either return or discard them Installation 2 1 Lake Shore Model 211 User s Manual Inspection and Unpacking Continued If the instrument must be returned for recalibration replacement or repair a returned goods authorization RGA number must be obtained from a factory representative before it is returned The Lake Shore RGA procedure is given in Paragraph 5 2 2 2 REAR PANEL DEFINITION This
55. change outside of an alarm condition to deactivate an unlatched alarm latch enable Specifies a latched alarm remains active after alarm condition correction where 0 off no latch and 1 on Configures the alarm parameters for the input ALARM 1 270 0 0 0 1 term Turns on alarm checking for the input activates high alarm if kelvin reading is over 270 and latches the alarm when kelvin reading falls below 270 high value low value lt deadband gt Remote Operation Lake Shore Model 211 User s Manual ALARM Input Alarm Parameter Query Input Returned Format ALARM term lt off on gt lt high value gt lt low value gt lt deadband gt lt latch enable gt term n nnn n nnn n nn n n Refer to command for description ALMRST Input Remarks ANALOG Reset Alarm Status Command ALMRST term Clears both the high and low status of the alarm including latching alarm Analog Output Parameter Command Input Format Example ANALOG ANALOG lt mode gt lt range gt term n n lt mode gt Specifies mode in which analog output operates where 0 voltage mode and 1 current mode lt range gt Sets temperature range that analog output uses as full scale 0 0 20K 320 325K 120 100K 420 475K 2 0 200K 5 0 1000K ANALOG 0 1 term Sets analog output to voltage mode 0 10V 100 0 K at 100 output 10 0 V and 0 0 K at 0 output 0 0 V Analog Output Param
56. con Diode GaAlAs Gallium Aluminum Arsenide Diode 250 Pt PT 100 250 Q Range 500 Pt PT 100 500 Q Range 1000 Pt PT 1000 5 kQ Range NTCRTD Neg Temp Coefficient RTD Input Curve Selections depend on input type None DT 470 DT 670 DT 670 PT 100 PT 1000 User Display Units front panel LEDs C Celsius F Fahrenheit K kelvin V Q Sensor Units Analog Output Settings Analog Output Mode Voltage Current Analog Output Range 0 0to20K 0 0to 100 0 010 200 0 0 0 325 02010475 0 0 to 1000 Alarm Settings Alarm Mode Off On High Setpoint Low Setpoint Deadband Latching 0 Off 1 On Relay Settings Relay 1 Mode Off On Alarms Relay 2 Mode Off On Alarms Lake Shore is a technology leader in the development of cryogenic temperature sensors precision low temperature measurement and control instrumentation and magnetic measurement and test systems Since 1968 Lake Shore physicists material scientists and engineers have dedicated themselves to the development of tomorrow s technology today Lake Shore serves a worldwide network of Customers including university and national laboratories aerospace and other industries as well as many of the premier companies around the world
57. d format for the input type selected Refer to Table 3 1 NOTE The sensor reading can always be displayed in sensor units If a temperature response curve is selected for an input its readings may also be displayed in temperature To select a curve continue from the input type selection Paragraph 3 5 1 or press the Select key use the A or W key to select InPUt then press the Enter key twice The display will show the curve currently assigned to the input If no curve is attached nonE will be displayed Use the A or V keys to cycle through the temperature response curves When the desired type appears press the Enter key Proceed to Paragraph 3 5 3 to select the display units or press the Select key to return to the normal display Table 3 2 Standard Curves Curve Displa Sensor Lake Shore Temperature No Name Type Sensor Garve 0 nonE None None None None 1 dt470 Silicon Diode DT 470 Curve 10 1 4 475 K 2 dt670 Silicon Diode DT 670 DT 670 1 4 500 K 3 ti Silicon Diode N A CTI Curve C 10 320K 1000 6 Pt 100 Platinum RTD PT 100 DIN 43760 30 800 K 1000 Q 7 PT1000 Platinum RTD N A DIN 43760 30 800 K 21 USEr User defined User defined User defined Operation 3 5 Lake Shore Model 211 User s Manual 3 5 3 Display Units Selection The Model 211 has a 6 character LED display During normal operation it can display the senor reading in temperature kelvin Celsius or
58. d letters Format The format parameter tells the instrument what breakpoint data format to expect Different sensor types require different formats Formats for Lake Shore sensors are V K Volts vs kelvin for diode sensors Q K Resistance vs kelvin for platinum RTD sensors Log Q K Log resistance vs kelvin for NTC resistive sensors Limit Temperature limit in kelvin for the curve Default is 375 K This limit is not used in this instrument but is left in to be compatible with Lake Shore temperature controllers Temperature Coefficient The unit derives the temperature coefficient from the first two breakpoints The coefficient sent by the user is ignored If itis not correct when the curve header is queried check for proper entry of those points A positive coefficient P indicates that the sensor signal increases with increasing temperature A negative coefficient N indicates that the sensor signal decreases with increasing temperature The power must be cycled or the RST command issued for the instrument to calculate the temperature coefficient after curve points have been entered Operation 3 11 Lake Shore Model 211 User s Manual 3 13 2 Curve Breakpoints Temperature response data of a calibrated sensor must be reduced to a table of breakpoints before entering it into the instrument Each breakpoint consists of one value in sensor units and one temperature value in kelvin Linear interpolation is used by the instrument
59. e Limited to 15 characters SN Curve serial number Limited to 10 characters format Curve data format Valid entries 2 VIK 3 Q K 4 log Q K lt limit value gt Curve temperature limit in kelvin Unused lt coefficient gt Curves temperature coefficient Valid entries 1 negative 2 positive Configures the user curve header Remote Operation Lake Shore Model 211 User s Manual Curve Header Command Continued Example CRVHDR Input Format Returned Format Remarks CRVPT Input Format Remarks Example CRVPT Input Format Returned Format Remarks Remote Operation CRVHDR 21 DT 470 00011134 2 325 0 1 term Configures User Curve 21 with a name of DT 470 serial number of 00011134 data format of volts versus kelvin upper temperature limit of 325 K and negative coefficient Curve Header Query CRVHDR lt curve gt term nn curve Valid entries 1 21 lt name gt lt SN gt lt format gt lt limit value coefficient term aaaaaaaaaaaaaaa aaaaaaaaaa n nnn nnn n Refer to command for description Returns a standard or user curve header Curve Data Point Command CRVPT lt curve gt index units value temp value gt term nn nnn nnnnnnn nnnnnnn curve Specifies which curve to configure Valid entry 21 index Specifies curve points index Valid entries 1 200 units value Specifies sensor units for po
60. e manual output of 0 4 mA Example Manual Zero Current Command ANALOG 3 0 Service 5 11 Lake Shore Model 211 User s Manual Analog Output Current Mode Calibration Continued 5 10 11 12 Read the output voltage with the DMM Divide this number by the measured resistor value and record this zero output ZERO value Set the analog output to 100 20 mA Example Manual FS Current Command ANALOG 3 2 Read the output voltage with the DMM Divide this number by the measured resistor value and record this positive full scale FS value Determine the offset calibration constant by subtracting the ZERO value from the zero current point of 4 mA and divide that by the difference of the FS value and the ZERO value Offset constant 4E 3 ZERO FS ZERO Use the CALZ command to send the offset calibration constant Example ZERO DMM Reading 4 03974E 3 FS DMM Reading 20 0674E 3 Offset Constant Calculation 4E 3 4 03974E 3 20 0674E 3 4 03974 3 0 00248 Calibration Command CALZ 2 1 0 00248 Determine the gain calibration constant by adding the FS reading to the inverse of the ZERO reading obtained in step 5 and dividing that number into 16 mA Gain constant 16E 3 FS ZERO Use the CALG command to send the gain calibration constant Example ZERO DMM Reading 4 03974E 3 FS DMM Reading 20 0674E 3 Gain Constant Calculation 16 3 20 0674E 3 4 03974E 3
61. e is too small However this practice is not recommended as the additional load on instrument power supplies causes noise on internal circuits In current mode the analog output can vary from 4 to 20 mA with a resolution of 0 2 uA or 0 0015 of full scale The output is limited by a 10 V compliance voltage so the largest resistive load that the output can drive in current mode is 500 O The analog output has two modes voltage and current and six ranges The ranges are listed in Table 3 3 The low output is the temperature that produces zero output 0 V or 4 mA and the high output is the temperature that produces full output 10 V or 20 mA If no curve is selected for the input the analog output range is fixed to output a signal proportional to sensor units Refer to Table 3 4 NOTE When a curve is selected for the input the analog output always works in kelvin no matter what units are displayed To begin analog output setup press the Select key and use the A or V key to select OUtPUt and press the Enter key Analog output mode will be set up first Use the or V key to choose between voltage mode or current mode Press the Enter key to store the analog output mode The next setting is analog output range Refer to Table 3 3 and use the A or V key to select a range for the analog output Press the Enter key to store the analog output range The display will return to normal operation 3 8 Operation Lake Shore Model 211 Use
62. e sensitivity of a silicon diode at 4 2 K the error in temperature would be only 3 mK At 77 K the sensitivity of a silicon diode is lower so the error would be close to 50 mK Again this may not be a problem for every user 2 6 8 Lowering Measurement Noise Good instrument hardware setup technique is one of the least expensive ways to reduce measurement noise The suggestions fall into two categories 1 Do not let noise from the outside enter into the measurement and 2 Let the instrument hardware features work to their best advantage Use 4 lead measurement whenever possible Do not connect sensor leads to chassis or earth ground Usetwisted shielded cable outside the cooling system Attach the shield pin on the sensor connector to the cable shield Do not attach the cable shield at the other end of the cable not even to ground without taking precautions to prevent ground loops Run different inputs and outputs in their own shielded cable Usetwisted wire inside the cooling system Consider ground strapping the instrument chassis to other instruments or computers Installation 2 7 Lake Shore Model 211 User s Manual 2 7 ANALOG OUTPUT The Analog Output available on the rear panel of the Model 211 can be configured as either a voltage or current output that can be used for monitor and control applications Its most basic function is a temperature monitor where it puts out a voltage or current that is propor
63. e the A or Y key to select the function of relay 1 from manually off r1 OFF manually on r1 On or following the low alarm r1 ALA If the relay is set to follow the alarm it will turn on when the temperature drops below the low alarm setpoint Press the Enter key to store the relay setting The next setting is the relay 2 setup indicated by the r2 on the left of the display Use the A or V key to select the function of relay 2 from manually off r2 OFF manually on 12 On or following the high alarm r2 ALA If the relay is set to follow the alarm it will turn on when the temperature goes above the high alarm setpoint Press the Enter key to store the relay setting The display will return to normal operation Operation 3 7 Lake Shore Model 211 User s Manual 3 8 ANALOG OUTPUT SETUP The Model 211 has a single analog output It is normally configured to provide an analog signal proportional to temperature to a strip chart recorder or separate data acquisition system Pins 6 and 18 on the DB 25 Input Output connector are used for the analog output See Figure 2 3 The analog output is front panel configurable to be either a variable DC voltage or current source In voltage mode the analog output can vary from 0 to 10 V with a resolution of 0 15 mV or 0 0015 of full scale The output can drive a resistive load of no less than 500 The output is short circuit protected so the instrument is not harmed if the load resistanc
64. easurement leads If these messages persist after the input or output is configured properly the instrument may require repair 5 3 1 Instrument Hardware Errors Err 01 Indicates that there is a hardware problem in the instrument memory This error is not correctable by the user and the factory should be consulted Err 02 Indicates there is a soft error in the instrument memory This error can be corrected reinitializing memory Reinitializing memory sets the instrument to defaults and erases the user curve To reinitialize the memory after an Error 02 press both the and Y keys simultaneously The display will blank for about 5 seconds while the memory is initialized 5 2 Service Lake Shore Model 211 User s Manual Instrument Hardware Errors Continued Err 03 Indicates the instrument has lost its calibration To continue using the instrument in an uncalibrated state press the Enter key after the Error 03 message appears The Error 03 message is not cleared and will be displayed again on power up until the unit is calibrated Err 04 Indicates that the A D converter is not communicating with the microprocessor This error is not correctable by the user Please contact the factory for instrument return information 5 3 2 Limit Errors Err 05 Input is at or under zero output Err 06 Input is at or over full scale Err 07 Temperature conversion is off the low end of the curve Err 08 Temperature conversion is off the high
65. end of the curve Err 09 No curve is selected for the input 5 4 OPENING THE ENCLOSURE WARNING To avoid potentially lethal shocks disconnect the power cord from the instrument before performing this procedure Only qualified personnel should perform this procedure REMOVAL 1 Disconnect the power cord from rear of unit 2 Ifattached remove from panel mount 3 Usea Phillips screwdriver to remove the four flat head screws from the corners of the rear panel 4 Slide out the PC board assembly The rear panel is attached to the PC board INSTALLATION 1 Slide the PC board assembly in from the rear of the chassis making sure the keypad aligns with the holes in the front panel 2 Usea Phillips screwdriver to install four flat head screws in the corners of the rear panel 3 If required replace the instrument in the panel mount opening 4 Connect power cord to rear of the unit Service 5 3 Lake Shore Model 211 User s Manual 5 5 CONNECTOR DEFINITIONS The POWER INPUT OUTPUT and RS 232 DTE connectors are defined in Figures 5 1 through 5 3 eee Connector Accepts a Barrel Plug 5 5mm OD x 2 1mm ID x 9 9 mm L Figure 5 1 Power Connector Input Output DB 25 P 211 2 3 bmp Pin Description Pin Description 1 No Connection 2 Shield 14 Shield 3 I 15 I 4 V 16 V 5 Shield 17 Shield 6 Analog Output Signal 18 Analog Output Ground 7 No Connecti
66. ent resolution Temperature data can be read up to seven times per second over computer interface the display is updated twice each second The Model 211 converts voltage or resistance to temperature units based on temperature response curve data for the sensor in use Standard temperature response curves for silicon diodes and platinum RTDs are included in instrument firmware The Model 211 also provides non volatile memory for one 200 point temperature response curve which can be entered via the serial interface Measurements are available in temperature units K C F or sensor units V or Q With an RS 232C serial interface and other interface features the Model 211 is valuable as a stand alone monitor and is easily integrated into other systems Setup and every instrument function can be performed via serial interface or the front panel of the Model 211 High and low alarms can be used in latching mode for error limit detection and in non latching mode in conjunction with relays to perform simple on off control functions The analog output can be configured for either 0 to 10 V or 4 to 20 mA output Table 1 1 Temperature Range of Typical Lake Shore Sensors Diodes Model Useful Range Silicon Diodes DT 670 1 4 500 K GaAlAs Diode TG 120 14 475 Positive Temperature Coefficient PTC RTDs 100 Q Platinum RTD PT 100 250 Q full scale 30 675K 100 Q Platinum RTD PT 100 500 Q full s
67. eter Query Input Returned Format ANALOG term mode range term n n Refer to command for definition AOUT Input Returned Format Remarks Analog Output Data Query AOUT term lt analog output gt term nnn nn Returns the percentage of output of the analog output Remote Operation 4 15 BRIGT Input Format BRIGT Input Returned Format CRDG Input Returned Format Remarks CRVDEL Input Format CRVHDR Input Format Remarks Lake Shore Model 211 User s Manual Display Brightness Command BRIGT lt bright gt term nn bright Sets display brightness Valid entries 0 15 0 least bright 15 most bright Default 8 Display Brightness Query BRIGT term lt bright gt term nn Refer to command for description Celsius Reading Query CRDG term lt temp value gt term nnnnnn Also see the RDGST command Curve Delete Command CRVDEL lt curve gt term nn lt curve gt Specifies user curve to delete Only valid entry is 21 Curve number is used to retain compatibility with existing instrument line Curve number 21 must be sent with the command or else the command will be ignored Curve Header Command CRVHDR lt curve gt lt name gt lt SN gt lt format gt lt limit value gt lt coefficient gt term nn aaaaaaaaaaaaaaa aaaaaaaaaa n Tnnn nnn n curve Specifies user curve Valid entry 21 name Curve nam
68. events accidental changes to parameter values When the keypad is locked only the alarm reset function of the Select key still functions All other key functions are ignored To lock the keypad press and hold the Enter key for 10 seconds The display will show LO indicating the keypad is now locked Release the Enter key and the display will return to normal operation To unlock the keypad press and hold the Enter key for 10 seconds The display will show UnLO indicating the keypad is now unlocked Release the Enter key and the display will return to normal operation 3 11 RESETTING THE MODEL 211 TO DEFAULT VALUES It is sometimes necessary to reset instrument parameters that are stored in nonvolatile memory called EEPROM The default values of the Model 211 are shown below in Table 3 6 Resetting to default values does not affect the user curve or the calibration data To reset the Model 211 to default values press and hold both the A or V keys for 10 seconds All of the LED digits will illuminate when the memory has been reset Release the buttons and the display will return to normal operation Table 3 6 Model 211 Default Values Parameter Default Parameter Default Input Type Silicon Diode Alarm Latch Off Input Curve DT 470 Analog Mode Voltage Display Units K Analog Range 5 Alarm Function Off Relay 1 Mode Off Alarm High OK Relay 2 Mode Off Alarm Low OK Keypad Lock Unlocked Alarm
69. ever in recognition that RoHS compliance is in the best interest of our customers employees and the environment Lake Shore has redesigned the Model 211 to eliminate the hazardous substances covered in the RoHS directive Regulatory Declarations A 7 Lake Shore Model 211 User s Manual B1 3 POWER SUPPLY CE DECLARATION PART NUMBER 109 132 20050 SW 112 Ave 2 CUI INC Tualatin OR 97062 SF Phone 800 275 4899 Fax 503 612 2383 EC Declaration Of Conformity For the following equipment Switching Power Supply Part Number EMSA050120 P5P SZ Model Number 3A 066WP05 Imported By CUI Inc 20050 SW 112 Ave Tualatin OR 97062 is herewith confirmed to comply with the requirements set out in the Council Directive on the Approximation of the Laws of the Member States relating to the Electromagnetic Compatibility Directive 2004 108 EC and Low Voltage Directive 2006 95 EC For the evaluation regarding the Electromagnetic Compatibility 2004 108 EC and Low Voltage Directive 2006 95 EC the following standards are applied EN55022 2006 A1 2007 Class EN55024 1998 A1 2001 A2 2003 EN61000 3 2 2006 EN61000 3 3 2008 EN61204 3 2000 Class B EN60950 1 2006 A 11 2009 Technical Support Engineer CUI Inc February 15 2011 A 8 Regulatory Declarations Lake Shore Model 211 User s Manual B1 4 POWER SUPPLY ROHS DECLARATION PART NUMBER 109 132 CUI INC 2 20050 SW 112 Ave Tualatin Oregon 97062 ph
70. formation When contacting Lake Shore directly please specify the name of a department if you do not know the name of an individual Questions regarding product applications price availability and shipments should be directed to sales Questions regarding instrument calibration or repair should be directed to instrument service Do not return a product to Lake Shore without a Return Goods Authorization RGA number Refer to Paragraph 5 2 Contact information may change periodically but current contact information can always be found on the Lake Shore web site www lakeshore com When contacting Lake Shore please provide your name and complete contact information including e mail address if possible It is often helpful to include the instrument model number and serial number located on the rear panel of the instrument as well as the firmware revision information as described in Paragraph 3 12 Lake Shore Cryotronics Inc Mailing Instrument Service Department Address 575 McCorkle Blvd Westerville OH USA 43082 8888 E mail Address sales lakeshore com Sales service lakeshore com Instrument Service Telephone 614 891 2244 Sales Sepe 614 891 2243 ext 131 Instrument Service Fax 614 818 1600 Sales ar 614 818 1609 Instrument Service Service 5 1 Lake Shore Model 211 User s Manual 5 2 RETURNING PRODUCTS TO LAKE SHORE If it is necessary to return the Model 211 or accessories for recalibration rep
71. int to 6 digits temp value Specifies the corresponding temperature in kelvin for this point to 6 digits Configures a user curve data point To finalize curve entry send the RST command or cycle the instrument power after all the curve points have been entered CRVPT 21 2 0 10191 470 000 term Sets User Curve 21 second data point to 0 10191 sensor units and 470 000 K Curve Data Point Query CRVPT lt curve gt lt index gt term nn nnn curve Specifies which curve to query 1 21 index Specifies the points index in the curve 1 200 units value temp value term nnnnnnn nnnnnnn Refer to command for description Returns a standard or user curve data point Lake Shore Model 211 User s Manual DFLT Factory Defaults Command Input DFLT 99 term Remarks Sets all configuration values to factory defaults and resets the instrument The 99 is included to prevent accidentally setting the unit to defaults DISPFLD Displayed Field Command Input DISPFLD lt source gt term Format n lt source gt Specifies input data to display Valid entries 0 kelvin 1 Celsius 2 sensor units 3 Fahrenheit Example DISPFLD 1 term Displays kelvin reading for the input DISPFLD Displayed Field Query Input DISPFLD term Returned lt source gt term Format n Refer to command for description DISPON Display On Off Command Input DISPON lt state gt term Format n statt
72. inues on the next page 4 8 Remote Operation Lake Shore Model 211 User s Manual Table 4 3 Visual Basic Serial Interface Program Continued frmSerial MSComm1 Output strCommand amp Term Send command to instrument If InStr strCommand lt gt 0 Then Check to see if query While ZeroCount lt 20 And strHold lt gt Chr 10 for response If frmSerial MSComml InBufferCount 0 Then frmSerial Timer Enabled True Do DoEvents Add 1 to timeout if no character Wait for 10 millisecond timer Loop Until frmSerial Timer1 Enabled False ZeroCount ZeroCount 1 Else ZeroCount 0 strHold frmSerial MSComml Input strReturn strReturn strHold End If Wend If strReturn lt gt Then Timeout at 2 seconds Reset timeout for each character Read in one character Add next character to string Get characters until terminators Check if string empty strReturn Mid strReturn 1 InStr strReturn Term 1 Strip terminators Else strReturn No Response End If frmSerial txtResponse Text strReturn form strHold ZeroCount 0 End If Loop End Sub Send No Response Put response in textbox on main Reset holding string Reset timeout counter Private Sub Timer1_Timer frmSerial Timer Enabled False End Sub Routine to handle Timer interrupt Turn off timer Remote Operation 4 9 Lake Shore Model 211 User
73. ion Both the voltage and current modes of the output need to be calibrated separately Zero offset and gain errors are calibrated out by programming offset and gain constants to the instrument Reference the CALZ and CALG commands and the extended version of the ANALOG command in Paragraph 5 6 4 5 6 3 1 Analog Output Voltage Mode Calibration Purpose To determine the analog output voltage mode offset and gain errors and provide offset and gain calibration constants back to the 211 Process 1 Reset the calibration constants to their default values using the CALZ and CALG commands Example Zero Offset Reset Command CALZ 2 0 0 Gain Reset Command CALG 2 0 1 2 Connect the 100 resistor standard to the analog output using only the two voltage leads Connect the positive lead of the DMM to the analog output positive terminal the negative lead is connected to the analog output negative terminal 3 Set the analog output to manual mode manual output of 0 Example Manual Zero Voltage Command ANALOG 4 0 4 Read the output voltage with the DMM and record this zero output ZERO value 5 Set the analog output to 1006 Example Manual 4 FS Voltage Command ANALOG 4 2 6 Read the output voltage with the DMM and record this positive full scale FS value 5 10 Service Lake Shore Model 211 User s Manual Analog Output Voltage Mode Calibration Continued 7 Determine the offset calibration constant by dividing the ZERO value b
74. ists In any important research as when using any laboratory equipment results should be carefully examined and rechecked before final conclusions are drawn Neither Lake Shore nor anyone else involved in the creation or production of this firmware can pay for loss of time inconvenience loss of use of the product or property damage caused by this product or its failure to work or any other incidental or consequential damages Use of our product implies that you understand the Lake Shore license agreement and statement of limited warranty FIRMWARE LICENSE AGREEMENT The firmware in this instrument is protected by United States copyright law and international treaty provisions To maintain the warranty the code contained in the firmware must not be modified Any changes made to the code is at the user s risk Lake Shore assumes no responsibility for damage or errors incurred as result of any changes made to the firmware Under the terms of this agreement you may only use the Model 211 firmware as physically installed in the instrument Archival copies are strictly forbidden You may not decompile disassemble or reverse engineer the firmware If you suspect there are problems with the firmware return the instrument to Lake Shore for repair under the terms of the Limited Warranty specified above Any unauthorized duplication or use of the Model 211 firmware in whole or in part in print or in any other storage and retrieval system is forbidden
75. ld be tied to the shield pins on the Input Output connector but should not be terminated at the other end The standard power supply 109 132 does not connect the common pins to earth ground The connection should be made externally If the sensor leads are shielded one end of the cable shield can be tied to the cryostat ground while the other end is tied to the shield pins on the Input Output connector If the sensor leads are not shielded the instrument chassis should be strapped to earth ground Installation 2 5 Lake Shore Model 211 User s Manual 2 6 5 Sensor Polarity Lake Shore sensors ship with instructions that indicate which sensor leads are which It is important to follow these instructions for plus and minus leads polarity as well as voltage and current when applicable Diode sensors do not operate in the wrong polarity They look like an open circuit to the instrument 2 lead resistors can operate with any lead arrangement and the sensor instructions may not specify polarity 4 lead resistors may depend more on lead arrangement Follow any specified lead assignment for four lead resistors Mixing leads could give a reading that appears correct but is not the most accurate DT 670 SD Diode Sensor Leads Cathode Anode 2 6 6 4 Lead Sensor Measurement All sensors including both 2 lead and 4 lead can be measured with a 4 lead technique 4 lead measurement eliminates the effect of lead resistance on the measuremen
76. m February 15 2006 Regulatory Declarations Lake Shore Model 211 User s Manual TA TJIN GOAN XIAMEN INDUSTRIAL LTD PER SE P TI HL S PCIE EA he 2 Tjin Goan Building Xinglong Rd Huli 361006 Xiamen P R C CABLE 6110 TEL 592 6020142 6033645 6033646 6033647 6033648 FAX 592 6020141 Declaration of Conformity Model SW0510 APX Part number IBO5U05LR TJIN GOAN complies with the EU Directive 2002 96 EC WEEE EU Directive 2003 11 EC Council Directive 76 769 EEC and EU Directive 2002 95 EC on Restriction on the use of certain hazardous substances RoHS in electrical and electronic equipment TJIN GOAN Products do not use the restricted hazardous substances Such as mercury hexavalent chromium polybrominated biphenyls PBB and polybrominated diphenyl ethers PBDE TJIN GOAN xiamen Industrial Ltd lt deste Shihuang Li General Manager Date Oct 30 2006 Regulatory Declarations A 13 Lake Shore Model 211 User s Manual This Page Intentionally Left Blank Regulatory Declarations InPut GUE Put rELAY Menu Structure un e r Lake Shore Model 211 User s Manual 1 5 APPENDIX MENU STRUCTURE Model 211 Menu Structure 5 LI GRALAS 250 Pt 500 Pt 1000 ntcrtd non dt 419 dt 8 1 Ce Pt 100 Pt 1000 USEr 3 c uy ru C3 ri OFF ri ALA re OFF re ALA Input Setup Settings Input Type Si Sili
77. mK at 800 K 88 mK at 77 K 1 144 K at 300 K 0 2 mQ 5 PPM 2 0 mQ 5 PPM 20 mQ 15 PPM of reading per C of reading per C of reading per C 45 mK at 30 K 60 mK at 30 K 9 mK at 4 2 K 38 mK at 77 K 53 mK at 77 K 138 mK at 77 105 mK at 300 K 170 mK at 300 K 1 284 K at 300 262 mK at 675 K 470 mK at 800 K 287 mK at 800 K Recommended for T gt 40K amp B lt 2 5T Recommended for T gt 40K amp B lt 25T Recommended for T gt 2K amp B lt 19T No longer available from Lake Shore Specified accuracy includes no effects of thermal EMF voltages An error of 3 mO results from each 1 of thermal EMF voltage In well designed systems thermal EMF voltage should be 10 u V Introduction 1 7 Lake Shore Model 211 User s Manual 1 3 SAFETY SUMMARY Observe these general safety precautions during all phases of instrument operation service and repair Failure to comply with these precautions or with specific warnings elsewhere in this manual violates safety standards of design manufacture and intended instrument use Lake Shore Cryotronics Inc assumes no liability for Customer failure to comply with these requirements The Model 211 protects the operator and surrounding area from electric shock or burn mechanical hazards excessive temperature and spread of fire from the instrument The Model 211 is designed for indoor use only Improper use of the instrument m
78. mmary in Paragraph 1 3 and safety symbols in Paragraph 1 4 1 14 DESCRIPTION The Lake Shore single channel Model 211 Temperature Monitor provides the accuracy resolution and interface features of a benchtop temperature monitor in an easy to use easily integrated compact instrument With appropriate sensors the Model 211 measures temperature from 1 4 to 800 K and in difficult sensing conditions including high vacuum and magnetic fields Alarms relays user configurable analog voltage or current output and a serial interface are standard features on the Model 211 Backed by the Lake Shore tradition of excellence in cryogenic and precision temperature measurement for science and industry the Model 211 is a good choice for liquefied gas storage monitoring cryopump control cryo cooler and materials science applications and for applications that require greater accuracy than thermocouples allow Y SELECT ENTER be LakeShore 211 Temperature Monitor 211_LED_Front bmp Figure 1 1 Model 211 Front Panel Introduction 1 1 Lake Shore Model 211 User s Manual Description Continued The Model 211 Temperature Monitor supports diode temperature sensors and resistance temperature detectors RTDs The Model 211 can be configured for the type of sensor in use from the instrument front panel Four lead differential measurement and 24 bit analog to digital conversion ensure high accuracy and 5 digit measurem
79. mount one or two temperature monitors in a 4 DIN cutout measuring 105 mm wide x 132 mm high 4 1 x 5 2 in See Figure 2 5 Panel bmp Figure 2 4 Panel Mounting Details Installation 2 9 Lake Shore Model 211 User s Manual 2111 Option Single 4 DIN Panel Adapter Mount 91 x 44 mm Lake Shore 3 6 x 1 7 in P N 107 306 Cutout 16 5 mm 0 65 in 6 4 mm 5mm 0 25 in 0 2 in 18 hole 12 hole 4 places 2 places 91 x 44 mm 3 6 x 1 7 in Cutout e 2112 Option E 2 Dual DIN zin Panel Adapter Cutout Mount Lake Shore P N 107 307 105 mm 4 1 in Figure 2 5 2111 and 2112 Panel Mount Adapters Installation 2 10 Lake Shore Model 211 User s Manual CHAPTER 3 OPERATION 3 0 GENERAL This chapter provides operating instructions for most features of the Model 211 Temperature Monitor Corresponding computer interface instructions for these features are provided in Chapter 4 3 4 INSTRUMENT POWER The Model 211 is powered on by plugging in the power supply There is no power switch on the instrument When the Model 211 is powered on every segment on the display will illuminate for a few seconds to indicate instrument initialization Most of the instrument setup parameter values are retained when powered off with one exception The latching alarm will reset itself on power up When the instrument is powered on for the first time parameter values are set to their defaults listed in Table 3 6
80. n The alarm state remains visible to the operator for diagnostics even if the alarm condition is removed Relays often signal remote monitors or for added safety take critical equipment off line Pressing the Select key clears latched alarms Non Latching Alarms Often tied to relay operation to control part of a system or experiment The dead band parameter can prevent relays from turning on and off repeatedly when the sensor input reading is near an alarm setpoint Example If the high alarm setpoint 100 K and the dead band 1 K the high alarm triggers when sensor input temperature increases to 100 K and it will not deactivate until temperature drops to 99 K To begin alarm setup press the Select key and use the A or Y key to select ALA and press the Enter key Use the A or Y key to turn the alarm function on or off If the alarm function is powered on the alarm will continue with alarm setup otherwise no other settings need to be made and the display will return to normal operation 3 6 Operation Lake Shore Model 211 User s Manual Alarm Setup and Operation Continued The next setting is the high alarm point indicated by a K on the left of the display The high alarm setpoint is always set in units of kelvin Use the A or Y key to set the high alarm setpoint Holding the button in will increase the rate of change The minimum value is 0 K and the highest is 999 9 K Press the Enter key to store the high alarm setpoint
81. nforms to the following Directives and Standards 73 23 EEC 89 336 EEC Standards to which Conformity is declared EN 61010 1 2001 Overvoltage II Pollution Degree 2 EN 61326 A2 2001 Class A Annex B Ed Maloof Printed Name Vice President of Engineering Position A 6 Regulatory Declarations Lake Shore Model 211 User s Manual B1 2 MODEL 211 ROHS DECLARATION OF CONFORMITY DECLARATION OF CONFORMITY in relation to DIRECTIVE 2002 95 EC OF THE EUROPEAN PARLIAMENT AND OF THE COUNCIL OF 27 JANUARY 2003 ON THE RESTRICTION OF THE USE OF CERTAIN HAZARDOUS SUBSTANCES RoHS IN ELECTRICAL AND ELECTRONIC EQUIPMENT The Lake Shore Model 211 Temperature Monitor Serial Number 21A0000 and subsequent complies fully with the requirements of Directive 2002 95 EC on the Restriction of the use of certain Hazardous Substances RoHS In accordance with Article 4 1 of Directive 2002 95 EC restricted substances are not present above the tolerated values defined within Commission Decision 2005 618 EC Edward Maloof Printed Name Vice President of Engineering akeShore Lake Shore Cryotronics Inc 575 McCorkle Boulevard Westerville OH 43082 Sales 614 891 2244 Fax 614 891 1392 sales lakeshore com e www lakeshore com Position Note The Model 211 is considered Waste Electrical and Electronic Equipment WEEE Category 9 equipment therefore falling outside the current scope of the RoHS directive How
82. nstrument including the terminators Guarantee that no other communication is started during the response or for 50 ms after it completes Notinitiate communication more than 20 times per second 4 4 Remote Operation Lake Shore Model 211 User s Manual Message Flow Control Continued NOTE The serial interface will not function during front panel setup operations Do not use the front panel during serial communications Failure to follow these rules may result in inability to establish communication with the instrument or intermittent failures in communication 4 1 6 Serial Interface Basic Program A Visual BASIC program is included to illustrate the serial communication functions of the instrument Refer to Paragraph 4 1 6 1 for instructions on how to set up the program The Visual Basic code is provided in Table 4 3 While the hardware and software required to produce and implement this program is not included with the instrument the concepts illustrated apply to almost any application where these tools are available 4 1 6 1 Visual Basic Serial Interface Program Setup The serial interface program Table 4 3 works with Visual Basic 6 0 VB6 on an IBM PC or compatible with a Pentium class processor A Pentium 90 or higher is recommended running Windows 95 or better with a serial interface It uses the COMI communications port at 9600 Baud Use the following to develop the Serial Interface Program in Visual Basic 1 S
83. of sensor cable Longer cables 100 feet or more can be used but environmental conditions may degrade accuracy and noise specifications 2 6 3 Shielding Sensor Leads Shielding the sensor lead cable is important to keep external noise from entering the measurement The sensor lead cable should be shielded whenever possible In many systems it is impractical to shield the sensor leads inside the cryostat In theses cases the cable shield should still be used on the room temperature sensor leads up to the cryostat A shield is most effective when it is near the measurement potential so the Model 211 offers a shield pin on the Input Output Connector that stays close to the measurement The shield pin is tied to chassis ground and should be used as the connection point for the sensor cable shield Depending on how the instrument is grounded the shield may or may not need to be terminated at the opposite end See Paragraph 2 6 4 below on instrument grounding 2 6 A Instrument Grounding The Model 211 does not provide isolation between measurement circuits and chassis ground The measurement leads have a finite impedance to chassis ground and should not be tied to ground outside the instrument or an error in reading may result The Model 211 has the best noise performance when the chassis is tied to earth ground This connection should be made at only one point so as to avoid ground loops If the sensor leads are shielded the cable shield shou
84. on 19 No Connection 8 Low Alarm COM 20 Low Alarm NO 9 Low Alarm NC 21 No Connection 10 No Connection 22 No Connection 11 High Alarm COM 23 High Alarm NO 12 High Alarm NC 24 No Connection 13 No Connection 25 No Connection Figure 5 2 Input Output Connector 5 4 Service Lake Shore Model 211 User s Manual Connector Definitions Continued RS 232 DTE 1 Serial Connector bmp Model 211 Temperature Monitor Typical Computers DE 9P DTE DB 25P DTE DE 9P DTE Pin Description Pin Description Pin Description 1 No Connection 2 TD out 1 DCD in 2 Receive Data RD in 3 RD in 2 RD in 3 Transmit Data TD out 4 RTS out 3 TD out 4 Data Terminal Ready 5 CTS in 4 DTR out DTR out 5 Ground GND 6 DSR in 5 GND 6 No Connection 7 GND 6 DSR in 7 Data Terminal Ready DCD in 7 RTS out DTR out tied to 4 8 No Connection 20 DTR out 8 CTS in 9 No Connection 22 Ringin in 9 Ring in in Figure 5 3 RS 232 DTE Connector Service 5 5 5 5 1 Lake Shore Model 211 User s Manual Serial Interface Cable Wiring The following are suggested cable wiring diagrams for connecting the Model 211 serial interface to various customer personal computers PCs Model 211 to PC Serial Interface PC with DE 9P Model 211 DE 9P EC IY masa d Yn S UN PC DE 9P 5 GND gt 5 GND 2 RD in 4
85. one 503 612 2300 toll free 800 275 4899 fax 503 612 2383 CERTIFICATE OF COMPLIANCE RoHS Declaration For the following equipment EMSA050120 Imported by CUI Inc 20050 SW 112th Ave Tualatin OR 97062 This is to certify that all components listed above are RoHS compliant meet the requirements of the current RoHS Directive 2002 95 EC and do not contain above the specified limits any of the below banned substances Lead Hexavalent Chromium Mercury Cadmium Polybrominated Biphenyls PBB Polybrominated Diphenylethers PBDE including DecaBDE 24 May 2010 Jeff Product Compliance Manager CUI Inc 1 800 275 4899 ismoot cui com Regulatory Declarations A 9 Lake Shore Model 211 User s Manual B1 5 CE DECLARATIONS FOR DISCONTINUED POWER SUPPLIES 20050 SW 112 Ave lt lt Tualatin OR 97062 SZ CUI INC Phone 800 275 4899 Fax 503 612 2381 EC Declaration Of Conformity For the following equipment Switching Power Supply Part Number EMS050120 PSP SZ Model Number 3A 061WP05 Imported By CUI Inc 20050 SW 112 Ave Tualatin OR 97062 is herewith confirme to comply with the requirements set out in the Council Directive on the Approximatior of the Laws of the Member States relating to the Electromagnetic Compatibility Direct 89 336 EEC Amended by 92 31 EEC amp 93 68 EEC For the evaluation regarding the Electromagnetic Compatibility 89 336 EEC Amended by 92 31 EEC am
86. orm1 Name frmSerial Caption Serial Interface Program Timer Enabled False Interval 10 4 6 Remote Operation Lake Shore Model 211 User s Manual Visual Basic Serial Interface Program Setup Continued 12 Add code provided in Table 4 3 a b In the Code Editor window under the Object dropdown list select General Add the statement Public gSend as Boolean Double Click on cmdSend Add code segment under Private Sub cmdSend Click as shown in Table 4 3 In the Code Editor window under the Object dropdown list select Form Make sure the Procedure dropdown list is set at Load The Code window should have written the segment of code Private Sub Form Load Add the code to this subroutine as shown in Table 4 3 Double Click on the Timer control Add code segment under Private Sub Timerl Timer as shown in Table 4 3 Make adjustments to code if different Com port settings are being used 13 Save the program 14 Run the program The program should resemble the following ig Serial Interface Program OF x Type exit to end program Command Response 15 Type in command or query in the Command box as described in Paragraph 4 1 6 2 16 Press Enter or select the Send button with the mouse to send command 17 Type Exit and press Enter to quit Remote Operation 4 7 Lake Shore Model 211 User s Manual Table 4 3 Visual Basic Serial Interface Program Public
87. p 93 68 EEC the following standards are applied UL 60950 1 EN 55022 199 A1 2000 2 2003 EN 55024 1991 A1 2001 EN 61000 3 2 2000 EN 61000 3 3 1995 1 2001 Albert 22 QC Product Specialist CUI Ine May 7 7008 A 10 Regulatory Declarations Lake Shore Model 211 User s Manual TO z wamaqa TJIN GOAN XIAMEN INDUSTRIAL LTD ft FR SE C138 HE DC PC te CT Tjin Goan Building Xinglong Rd Huli 361006 Xiamen P R C CABLE 6110 TEL 592 6020142 6033645 6033646 6033647 6033648 FAX 592 6020141 EU Declaration of Conformity according to the Low Voltage Directive 73 23 EEC and EMC Directive 89 336 EEC 92 31 EEC with the Amendment Directive 93 68 EEC For the following equipment Product IB0SUOSLR eco Type Designation Trademark _ TGI it Manufacturer s Name TJIN GOAN XIAMEN INDUSTRIAL LTD 29 Manufacturer s Address Tjin Goan Building Xinglong Rd Huli 361006 Xiamen P R C Is herewith confirment to comply with the requirements set out in the Council Directive T3I23IEEC for electrical equipment used within certain voltage limits and the Amendment Directive 93 68 EEC For the evaluation of the compliance with this Directives 89 336 EEC the following standards were applied EN60850 1 2001 EN55022 1999 EN55024 A2 2003 EN61000 P Responsible for making this declaration is the Manufacturer v authorized representative established within the EU Authorized re
88. p The remainder of this paragraph briefly describes the key features of a serial interface that are supported by the instrument A customer supplied computer with similarly configured interface port is required to enable communication 4 1 1 Physical Connection The Model 211 has a 9 pin D Subminiature plug on the rear panel for serial communication The original RS 232C standard specifies 25 pins but both 9 and 25 pin connectors are commonly used in the computer industry Many third party cables exist for connecting the instrument to computers with either 9 or 25 pin connectors Section 5 3 gives the most common pin assignments for 9 and 25 pin connectors Please note that not all pins or functions are supported by the Model 211 The instrument serial connector is the plug half of a mating pair and must be matched with a socket on the cable If a cable has the correct wiring configuration but also has a plug end a gender changer can be used to mate two plug ends together Remote Operation 4 1 Lake Shore Model 211 User s Manual Physical Connection Continued The letters DTE near the interface connector stand for Data Terminal Equipment and indicate the pin connection of the directional pins such as transmit data TD and receive data RD Equipment with Data Communications Equipment DCE wiring can be connected to the instrument with a straight through cable As an example pin 3 of the DTE connector holds the transmit line
89. presentative established within the EU a applicable Company Name __ TJIN GOAN XIAMEN INDUSTRIAL LTD Company Address Tjin Goan Building Xinglong Rd Huli 361006 Xiamen P R C Person responsible for making this declaration Name LISHIHUANG 0 0 00 Lu Position Title _ PRESIDENT gt TJIN GOAN XIAMEN INDUSTRIAL LTO XIAMEN JUNE 30 2006 a Regulatory Declarations A 11 Lake Shore Model 211 User s Manual B1 6 ROHS DECLARATIONS FOR DISCONTINUED POWER SUPPLIES ZS Gens gy Beaverton OR 97005 ag P 503 643 4899 i e 4 a F 503 372 1266 POWER SUPPLIES SPEAKERS SWITCHING POWER ENCODERS TRANSFORMERS CONNECTORS 800 275 4899 www cui com CUI Inc CERTIFICATE OF COMPLIANCE RoHS Declaration For the Following equipment EMS050120 PSP SZ EMS060100 PSP SZ EMS090066 P5P SZ EMS120050 P5P SZ EMS120050 P6P SZ EMS150040 P5P SZ EMS180033 P5P SZ EMS240025 P5P SZ Imported By CUI Inc 9615 SW Allen Blvd Suite 103 Beaverton OR 97005 This is to certify that all components listed above are RoHS compliant and meet the requirements of the current RoHS Directive 2002 95 EC and do not contain above the specified limits any of the below banned substances Hexavalent Chromium Cadmium Polybrominated Diphenylethers PBDE Lead Mercury Polybrominated Biphenyls PBB EC o Product Compliance Manager CUI Inc 1800 275 4899 smoot cuLco
90. r s Manual Analog Output Setup Continued Table 3 3 Analog Table 3 4 Analog Output Output Range Scales Scales In Sensor Units Range Low High Input Low High Number Output Output Type Output Output 0 OK 20K Silicon Diode OV 10 V 1 OK 100 K GaAlAs Diode OV 10 V 2 OK 200 K PT 100 250 Q 00 1 kO 3 OK 325K PT 100 500 O 09 1 KQ 4 OK 475 PT 1000 0 10 kQ 5 OK 1000 K NTC RTD 0Q 10 kQ 3 9 ANALOG OUTPUT TO TEMPERATURE CONVERSION The output current or voltage is directly proportional to the temperature reading For the 4 20 mA output the following formula converts output current to temperature T A Bx lout where T temperature in kelvin Iour output current in mA and A and B are constants from Table 3 5 For the 0 10 V output the following formula converts output voltage to temperature T C x where T temperature in kelvin Vour output voltage and C is a constant from Table 3 5 Table 3 5 Conversion Parameters for Temperature in K 4 20 mA 0 10 V RANGE TEMP K A K B K mA C K V 0 0 20 5 00 1 2500 2 0 1 0 100 25 00 6 2500 10 0 2 0 200 50 00 12 5000 20 0 3 0 325 81 25 20 3125 32 5 4 0 475 118 75 29 6875 47 5 5 0 1000 250 00 62 5000 100 0 Operation 3 9 Lake Shore Model 211 User s Manual 3 10 LOCKING AND UNLOCKING THE KEYPAD The keypad lock feature pr
91. rform this procedure 5 6 1 Equipment Required for Calibration PC and Interface PC with software loaded providing serial command line communication example program in Paragraph 4 1 6 is ideal for this purpose Serial interface cable Test and Measurement Equipment Digital Multimeter DMM with minimum of 6 digits resolution DMM DC voltage and 4 lead resistance specifications to be equivalent to or better than Agilent 34401 specifications Cable to attach resistor standards to input Resistor Standards Resistor standards with the following nominal values if standards are not available 0 25 W 25 ppm C metal film resistors can be used resistors should have connectors for 4 lead measurement short 1000 250 Q 5000 2 5 5 7 5 100 250 5 6 2 Diode Resistor Sensor Input Calibration The sensor input contains a current source that can supply 10 uA or 1 mA of current but only the 10 uA current source is adjusted during calibration Itis calibrated by adjusting the pot on the Model 211 main board The sensor input contains multiple gain stages to accommodate the various sensors the Model 211 supports The input gain and 1 mA circuitry are not adjusted during calibration Instead calibrated resistors are attached to the input and mathematical calibration constants are calculated and programmed into the 211 to compensate for input offset and gain errors 5 6 2 1 Sensor Input Calibration
92. s written permission of Lake Shore Lake Shore Model 211 User s Manual ELECTROMAGNETIC COMPATIBILITY ADDENDUM Electromagnetic Compatibility EMC of electronic equipment is a growing concern worldwide Emissions of and immunity to electromagnetic interference is now part of most electronics design and manufacture To qualify for the CE mark the Model 211 meets the generic requirements of the European EMC Directive 89 336 EEC as a Class B product The instrument was tested under normal operating conditions with sensor and interface cables attached If the installation and operating instructions in the User s Manual are followed there should be no degradation in EMC performance Pay special attention to instrument cabling Improperly installed cabling may defeat even the best EMC protection For the best performance from any precision instrument follow the grounding and shielding instructions in the User s Manual In addition the installer of the Model 211 should consider the following Leave no unused or unterminated cables attached to the instrument Make cable runs as short and direct as possible Do not tightly bundle cables that carry different types of signals FIRMWARE LIMITATIONS Lake Shore has worked to ensure that the Model 211 firmware is as free of errors as possible and that the results you obtain from the instrument are accurate and reliable However as with any computer based software the possibility of errors ex
93. scale Connector DB 25 shares input connector General Ambient Temperature Range 15 35 C 59 95 F at rated accuracy 10 40 C 50 104 F at reduced accuracy Power Requirement Regulated 5 VDC at 400 mA Barrel Plug 5 5mm OD x 2 1mm ID x 9 9mm L Size 96 mm W x 48 mm H x 166 mm D 3 8 x 1 9 x 6 5 in Mounting Panel mount into 91 mm W x 44 mm H 3 6 x 1 7 in cutout Weight 0 45 kg 1 1b Approval CE mark RoHS compliant 1 4 Introduction Lake Shore Model 211 User s Manual Power Supply 109 132 Power requirements 100 240 VAC 50 or 60 Hz 0 3 A max Output 5 V at 1 2 A Size 40 5 mm W x 30 0 mm H x 64 mm D 1 6 in x 1 2 in x 2 5 in Weight 0 15 kg 0 33 1b Ordering Information Part Number Description 2115 Model 211 temperature monitor single channel 211N Model 211 with no power supply Accessories included with the Model 211 Temperature Monitor 109 132 100 240 V 6 W power supply universal input interchangeable input plugs G 106 253 Sensor input mating connector DB 25 G 106 264 Shell for sensor input mating connector G 110 110 Rubber feet 0 204 Cable clamp Calibration certificate MAN 211 User s manual Options and Accessories 2111 Single 14 DIN panel mount adapter see Figure 2 5 2112 Dual 4 DIN panel mount adapter see Figure 2 5 8000 CalCurve CD ROM included with calibrated sensor 8001 211 CalCurve factory installed CAL 211 CERT Instrument rec
94. t If it is not taken out lead resistance is a direct error when measuring a sensor sb V 4 Lead Diode Platinum v In a 4 lead measurement current leads and voltage leads run separately to the sensor With separate leads there is little current in the voltage leads so their resistance does not enter into the measurement Resistance in the current leads will not change the current as long as the voltage compliance of the current source is not reached When 2 lead sensors are used in 4 lead measurements the short leads on the sensor have an insignificant resistance 2 6 Installation Lake Shore Model 211 User s Manual 2 6 7 2 Lead Sensor Measurement Sometimes a crowded cryogenic system forces users to read sensors in a 2 lead configuration because there are not enough feedthroughs or room for lead wires If this is the case plus voltage to plus current and minus voltage to minus current leads are attached at the back of the instrument or at the vacuum feedthrough I We 2 Lead Diode We The error in a resistive measurement is the resistance of the lead wire run with current and voltage together If the leads contribute 2 or 3 Q to a 5 KQ reading the error can probably be tolerated When measuring voltage for diode sensors the error in voltage can be calculated as the lead resistance times the current typically 10 uA For example a 10 lead resistance times 10 uA results in a 0 1 mV error in voltage Given th
95. t Output P 211 2 3 bmp Pin Description Pin Description 1 No Connection 2 Shield 14 Shield 3 I 15 I 4 V 16 V 5 Shield 17 Shield 6 Analog Output Signal 18 Analog Output Ground 7 No Connection 19 No Connection 8 Low Alarm COM 20 Low Alarm NO 9 Low Alarm NC 21 No Connection 10 No Connection 22 No Connection 11 High Alarm COM 23 High Alarm NO 12 High Alarm NC 24 No Connection 13 No Connection 25 No Connection Figure 2 3 Input Output Connector 2 6 2 Sensor Lead Cable The sensor lead cable used outside the cooling system can be much different from what is used inside Between the instrument and vacuum shroud heat leak is not a problem but errors from noise pick up need to be minimized Larger conductor 22 to 28 AWG stranded copper wire is recommended because it has low resistance yet remains flexible when several wires are bundled in a cable 2 4 Installation Lake Shore Model 211 User s Manual Sensor Lead Cable Continued The arrangement of wires in a cable is also important For best results twist voltage leads V and V together and twist current leads I and I together Cover the twisted pairs of voltage and current leads with a braided or foil shield connected to the shield pin of the instrument This type of cable is available through local electronics suppliers Instrument specifications are given assuming 10 feet
96. ta if necessary is described in Paragraph 4 2 1 Terminators must be sent with every message string The computer should expect a response very soon after a query is sent A response string is the instruments response or answer to a query string The response can be a reading value status report or the present value of a parameter Response data formats are listed along with the associated queries in Paragraph 4 2 1 The response is sent as soon as possible after the instrument receives the query Typically it takes 10 ms for the instrument to begin the response Some responses take longer 4 1 5 Message Flow Control It is important to remember that the user program is in charge of the serial communication at all times The instrument cannot initiate communication determine which device should be transmitting at a given time or guarantee timing between messages This is the responsibility of the user program When issuing commands only the user program should Properly format and transmit the command including terminators as one string Guarantee that no other communication is started for 50 ms after the last character is transmitted Notinitiate communication more than 20 times per second When issuing queries or queries and commands together the user program should Properly format and transmit the query including terminators as one string Prepare to receive a response immediately Receive the entire response from the i
97. tant will be provided to Valid entries are 1 for input and 2 for the analog output type Specifies the input sensor type Valid entries are 0 Silicon Diode or Analog Out Voltage Mode 1 GaAlAs Diode or Analog Out Current Mode 2 100 Q Plat 250 3 100 Plat 500 4 1000 Plat 5 RTD lt value gt Zero offset calibration constant value Provides the zero offset calibration constant for the input or analog output Zero Offset Calibration Constant Query CALZ lt input gt lt type gt term n n input 1 0 2 lt type gt 0 5 lt value gt term xnnnnnnn Refer to command for description 5 16 Lake Shore Model 211 User s Manual This Page Intentionally Left Blank Service Lake Shore Model 211 User s Manual CHAPTER 6 OPTIONS AND ACCESSORIES 6 0 GENERAL This chapter provides lists of models options accessories sensors wires and special equipment available for the Model 211 61 MODELS Part Description 211S Model 211 temperature monitor single channel 211N Model 211S with no power supply 6 2 ACCESSORIES Part Description 109 132 100 240 V 6 W power supply universal input changeable input plugs G 106 253 Sensor input mating connector DB 25 G 106 264 Shell for sensor input mating connector 0 204 Cable clamp G 110 110 Rubber feet 2111 Panel mount adapter for one Model 211 into 105 mm wide x 132 mm high 4 1 x 5
98. tart VB6 2 Choose Standard EXE and select Open 3 Resize form window to desired size 4 On the Project Menu click Components to bring up a list of additional controls available in VB6 5 Scroll through the controls and select Microsoft Comm Control 6 0 Select OK In the toolbar at the left of the screen the Comm Control will have appeared as a telephone icon 6 Select the Comm control and add it to the form 7 Add controls to form a Add three Label controls to the form b Addtwo TextBox controls to the form c Add one CommandButton control to the form d Addone Timer control to the form 8 the View Menu select Properties Window Remote Operation 4 5 Lake Shore Model 211 User s Manual Visual Basic Serial Interface Program Setup Continued Label1 Command1 ig Serial Interface Program Label3 Label2 9 Inthe Properties window use the dropdown list to select between the different controls of the current project 10 Set the properties of the controls as defined in Table 4 2 11 Save the program Table 4 2 Serial Interface Program Conirol Properties Current Name Property New Value Labell Name IbIExitProgram Caption Type exit to end program Label2 Name IbICommand Caption Command Label3 Name IbIResponse Caption Response Textl Name txtCommand Text lt blank gt Text2 Name txtResponse Text lt blank gt Command Name cmdSend Caption Send Default True F
99. tee that data message strings do not collide and that no data is transmitted before the receiver is ready In this instrument appropriate software timing substitutes for hardware handshaking User programs must take full responsibility for flow control and timing as described in Paragraph 4 1 5 4 2 Remote Operation Lake Shore Model 211 User s Manual 4 1 3 Character Format A character is the smallest piece of information that can be transmitted by the interface Each character is 10 bits long and contains data bits bits for character timing and an error detection bit The instrument uses 7 bits for data in the ASCII format One start bit and one stop bit are necessary to synchronize consecutive characters Parity is a method of error detection One parity bit configured for odd parity is included in each character ASCII letter and number characters are used most often as character data Punctuation characters are used as delimiters to separate different commands or pieces of data Two special ASCII characters carriage return CR ODH and line feed LF OAH are used to indicate the end of a message string Table 4 1 Serial Interface Specifications Connector Type 9 pin D style plug Connector Wiring DTE Voltage Levels EIA RS 232C specified Transmission Distance 50 feet maximum Timing Format Asynchronous Transmission Mode Half duplex Baud Rate 9600 Handshake Software timing Character Bits 1 start 7 data 1 parity
100. tional to temperature Refer to Paragraph 3 8 to configure the analog output In voltage mode the analog output can vary from 0 10 V with a resolution of 0 15 mV or 0 0015 of full scale The output can drive a resistive load of no less than 500 Q The output is short circuit protected so the instrument is not harmed if the load resistance is too small However this practice is not recommended as the additional load on the instrument power supply causes noise on internal circuits In current mode the analog output can vary from 4 to 20 mA with a resolution of 0 3 uA or 0 0015 of full scale The output is limited by a 10 V compliance voltage so the largest resistive load that the output can drive in current mode is 500 The output for the analog output is available from Pins 6 and 18 of the Input Output connector See Figure 2 3 The terminal marked analog output signal is the output voltage terminal the terminal marked analog output ground is the ground and is attached to chassis ground inside the instrument It is not recommended to attach the analog output ground to a ground outside the instrument The output should be read by an instrument with an isolated or differential input wherever possible Connecting to an external ground can cause noise in the analog output voltage or the sensor input measurement If this cannot be avoided try to keep the chassis of the two instruments at the same potential with a ground strap 2 8 RELAYS
101. y the difference of the FS value and the ZERO value and then inverting the result Offset constant ZERO FS ZERO 8 Use the CALZ command to send the offset calibration constant Example ZERO DMM Reading 0 05632 FS DMM Reading 10 0135 Offset Constant Calculation 0 05632 10 0135 0 05632 0 00559 Calibration Command CALZ 2 0 0 00559 9 Determine the gain calibration constant by adding the FS reading to the inverse of the ZERO reading obtained in step 3 and dividing that number into 10 Gain constant 10 FS ZERO 10 Use the CALG command to send the gain calibration constant Example ZERO DMM Reading 0 05632 FS DMM Reading 10 0135 Gain Constant Calculation 10 10 0135 0 05632 0 99307 Calibration Command CALG 2 0 0 99307 5 6 3 2 Analog Output Current Mode Calibration Purpose To determine the analog output current mode offset and gain errors and provide offset and gain calibration constants back to the 211 Process 1 Reset the calibration constants to their default values using CALZ and CALG commands Example Zero Offset Reset Command CALZ 2 1 0 Gain Reset Command CALG 2 1 1 2 Accurately determine the value of the 250 Q resistor using the DMM 3 Connect 250 resistor standard to the analog output with the two current leads Connect the DMM to the two voltage leads of the resistor standard 4 Set the analog output to manual mod

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