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Lake Shore Model 331 Temperature Controller User’s Manual 

 

TABLE OF CONTENTS (Continued) 

 

Chapter/Paragraph Title 

Page 

8.9.2.3 

Diode Input Ranges Calibration ................................................................................................ 8-12 

8.9.2.4 Resistive 

Input 

Ranges Calibration .......................................................................................... 8-13 

8.9.3 

Diode Sensor Input Calibration - 1 mA Excitation Current ........................................................... 8-14 

8.9.4 Thermocouple 

Sensor Input Calibration ....................................................................................... 8-14 

8.9.4.1 

Sensor Input Calibration Setup ................................................................................................. 8-14 

8.9.4.2 Thermocouple 

Input Ranges Calibration .................................................................................. 8-14 

8.9.5 Analog 

Output Calibration (Model 331S Only) ............................................................................. 8-15 

8.9.5.1 Analog 

Output Calibration ........................................................................................................ 8-16 

8.9.6 Calibration Specific Interface Commands .................................................................................... 8-17 

APPENDIX A – GLOSSARY OF TERMINOLOGY ........................................................................................................ A-1 

APPENDIX B – TEMPERATURE SCALES .................................................................................................................. B-1 

APPENDIX C – HANDLING OF LIQUID HELIUM AND NITROGEN ............................................................................ C-1 

APPENDIX D – CURVE TABLES ................................................................................................................................. D-1 

 
 

LIST OF ILLUSTRATIONS 

 

Figure No. 

Title 

Page 

1-1 

Model 331S Rear Panel Connections .......................................................................................................... 1-3 

2-1 

Silicon Diode Sensor Calibrations and CalCurve ......................................................................................... 2-4 

2-2 

Typical Sensor Installation In A Mechanical Refrigerator ............................................................................. 2-6 

2-3 Examples 

of PID Control ............................................................................................................................ 2-11 

3-1 

Model 331 Rear Panel .................................................................................................................................. 3-2 

3-2 Line 

Input Assembly ..................................................................................................................................... 3-3 

3-3 Diode/Resistor 

Input Connector ................................................................................................................... 3-4 

3-4 

Thermocouple Input Definition and Common Connector Polarities .............................................................. 3-7 

3-5 

RELAYS and ANALOG OUTPUT Terminal Block ...................................................................................... 3-10 

4-1 

Model 331 Front Panel ................................................................................................................................. 4-1 

4-2 Display 

Definition ......................................................................................................................................... 4-4 

4-3 Display 

Format Definition ............................................................................................................................. 4-5 

4-4 

Record of Zone Settings ............................................................................................................................. 4-22 

4-5 Deadband 

Example .................................................................................................................................... 4-29 

4-6 Relay 

Settings ............................................................................................................................................ 4-31 

5-1 

SoftCal Temperature Ranges for Silicon Diode Sensors .............................................................................. 5-8 

5-2 

SoftCal Temperature Ranges for Platinum Sensors..................................................................................... 5-9 

6-1 GPIB 

Setting 

Configuration .......................................................................................................................... 6-6 

6-2 

DEV 12 Device Template Configuration ....................................................................................................... 6-6 

6-3 

Typical National Instruments GPIB Configuration from IBCONF.EXE........................................................ 6-11 

7-1 

Model 331 Sensor and Heater Cable Assembly ........................................................................................... 7-4 

7-2 

Model 3003 Heater Output Conditioner ........................................................................................................ 7-4 

7-3 Model 

RM-1/2 

Rack-Mount Kit ..................................................................................................................... 7-5 

7-4 

Model RM-2 Dual Rack-Mount Kit ................................................................................................................ 7-6 

8-1 

Power Fuse Access ...................................................................................................................................... 8-2 

8-2 

Sensor INPUT A and B Connector Details ................................................................................................... 8-3 

8-3 

HEATER OUTPUT Connector Details .......................................................................................................... 8-3 

8-4 

RELAYS and ANALOG OUTPUT Terminal Block ........................................................................................ 8-4 

8-5 

RS-232 Connector Details ............................................................................................................................ 8-4 

8-6 

IEEE-488 Rear Panel Connector Details ...................................................................................................... 8-6 

8-7 

Location of Internal Components ................................................................................................................. 8-9 

B-1 Temperature 

Scale Comparison .................................................................................................................. B-1 

C-1 Typical 

Cryogenic Storage Dewar ................................................................................................................ C-1 

 

Table of Contents 

v 

Содержание 331E

Страница 1: ...o 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 an...

Страница 2: ...the exclusion of liability for incidental or consequential damages so the above limitation may not apply to you LIMITED WARRANTY STATEMENT Continued 9 EXCEPT TO THE EXTENT ALLOWED BY APPLICABLE LAW TH...

Страница 3: ...USA hereby declare that the equipment specified conforms to the following Directives and Standards Application of Council Directives 73 23 EEC 89 336 EEC Standards to which Conformity is declared EN61...

Страница 4: ...r 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 This instrument is not intended for u...

Страница 5: ...sor Location 2 5 2 3 3 Thermal Conductivity 2 5 2 3 4 Contact Area 2 5 2 3 5 Contact Pressure 2 6 2 3 6 Lead Wire 2 6 2 3 7 Lead Soldering 2 7 2 3 8 Heat Sinking Leads 2 7 2 3 9 Thermal Radiation 2 7...

Страница 6: ...7 2 Loop 1 Heater Output Connector 3 8 3 7 3 Loop 1 Heater Output Wiring 3 8 3 7 4 Loop 1 Heater Output Noise 3 9 3 7 5 Loop 2 Output 3 9 3 7 6 Loop 2 Output Resistance 3 9 3 7 7 Loop 2 Output Connec...

Страница 7: ...elays 4 31 4 16 ANALOG OUTPUT 4 32 4 16 1 Analog Output In Input Mode 4 32 4 16 2 Analog Output In Manual Mode 4 34 4 16 3 Analog Output In Loop 2 Mode 4 35 4 17 LOCKING AND UNLOCKING THE KEYPAD 4 35...

Страница 8: ...6 17 6 2 7 1 Visual Basic Serial Interface Program Setup 6 17 6 2 7 2 Quick Basic Serial Interface Program Setup 6 20 6 2 7 3 Program Operation 6 21 6 2 8 Troubleshooting 6 21 6 3 COMMAND SUMMARY 6 22...

Страница 9: ...2 3 2 Line Input Assembly 3 3 3 3 Diode Resistor Input Connector 3 4 3 4 Thermocouple Input Definition and Common Connector Polarities 3 7 3 5 RELAYS and ANALOG OUTPUT Terminal Block 3 10 4 1 Model 33...

Страница 10: ...E 488 Interface Program 6 12 6 4 Serial Interface Specifications 6 15 6 5 Serial Interface Program Control Properties 6 18 6 6 Visual Basic Serial Interface Program 6 19 6 7 Quick Basic Serial Interfa...

Страница 11: ...odel 331 features two inputs with a high resolution 24 bit analog to digital converter and separate current source for each input Sensors are optically isolated from other instrument functions for qui...

Страница 12: ...d The setpoint ramp feature allows smooth continuous changes in setpoint and can also make the approach to a setpoint temperature more predictable The zone feature can automatically change control par...

Страница 13: ...ter range and control output as current or power can also be continuously displayed for immediate feedback on control operation Normal Default Display Configuration The display provides four reading l...

Страница 14: ...K4 Not Recommended Germanium GR 200A B 2500 3 1 K to 100 K4 Not Recommended Carbon Glass CGR 1 500 4 K to 325 K5 T 2 K to 19 T Carbon Glass CGR 1 1000 5 K to 325 K5 T 2 K to 19 T Carbon Glass CGR 1 2...

Страница 15: ...h 1 4J calibration 30 K 3 660 0 191 K 10 5 mK 23 mK 33 mK 21 mK 77 K 20 38 0 423 K 4 8 mK 15 mK 27 mK 9 6 mK 300 K 110 35 0 387 K 5 2 mK 39 mK 62 mK 10 4 mK 500 K 185 668 0 378 K 5 3 mK 60 mK 106 mK 1...

Страница 16: ...of inputs 2 Input configuration Each input is factory configured for either diode RTD or thermocouples Isolation Sensor inputs optically isolated from other circuits but not each other A D resolution...

Страница 17: ...Safety limits Curve temperature power up heater off short circuit protection Table 1 5 Heater Output Loop 1 Loop 2 Heater output type Variable DC current source Variable DC voltage source Heater outpu...

Страница 18: ...pad lock out Interface IEEE 488 interface 331S Features SH1 AH1 T5 L4 SR1 RL1 PP0 DC1 DT0 C0 E1 Reading rate To 10 readings per s on each input Software support LabVIEW driver consult factory for avai...

Страница 19: ...d 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...

Страница 20: ...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 disc...

Страница 21: ...her too high or too low Manufacturer recommendations should always be followed Sensor sensitivity is also dependent on temperature and can limit the useful range of a sensor It is important not to spe...

Страница 22: ...s Install the sensor properly following guidelines in Paragraph 2 3 Have the sensor and instrument periodically recalibrated or in some other way null the time dependent errors Use a sensor calibratio...

Страница 23: ...a temperature response curve Refer to Paragraph 2 2 4 The Model 331 can also perform a SoftCal calibration The user must provide one two or three known temperature reference points The range and accu...

Страница 24: ...ed in it Users download Precision Option breakpoint pairs in ACSII format from a floppy disk Users install a NOVRAM with Precision Option breakpoint pairs loaded in it To increase accuracy perform a S...

Страница 25: ...ce to mount a sensor in an already crowded cryostat is never easy There are less problems if the entire load and sample holder are at the same temperature Unfortunately this not the case in many syste...

Страница 26: ...e must be added to the sensor for proper heat sinking and connecting to a bulk head connector at the vacuum boundary The lead wire must be a good electrical conductor but should not be a good thermal...

Страница 27: ...surface so some cooling power must be directed to the shield to keep it near the load temperature If the cooling system does not include an integrated radiation shield or one cannot be easily made on...

Страница 28: ...r leads should be included so that any heat leaking in does not warm the load when the heater is not running The lead wires should be twisted to minimize noise coupling between the heater and other le...

Страница 29: ...ontrol loop the controller must be retuned As an example a thermal mass acts differently at different temperatures The specific heat of the load material is a major factor in thermal mass and the spec...

Страница 30: ...of the integral setting In the Model 331 the integral term is not set in seconds like some other systems The integral setting can be derived by dividing 1000 by the integral seconds Isetting 1000 Ise...

Страница 31: ...Lake Shore Model 331 Temperature Controller User s Manual P 331 2 3 bmp Figure 2 3 Examples of PID Control Cooling System Design 2 11...

Страница 32: ...er ranges for good control over their full temperature Lower heater ranges are normally needed for lower temperature The Model 331 is of no use controlling at or below the temperature reached when the...

Страница 33: ...emperature act differently than changes that lower the temperature If it was not possible to measure the oscillation period of the load during proportional setting start with an integral setting of 20...

Страница 34: ...an be a problem System nonlinearity is a problem for both AutoTune and manual tuning It is most commonly noticed when controlling near the maximum or minimum temperature of a temperature control syste...

Страница 35: ...ument sensor s accessories and manual were received Please use the packing list and the spaces provided to check off each item as the instrument is unpacked Inspect for damage Be sure to inventory all...

Страница 36: ...ar panel connections This is especially critical when making sensor to instrument connections 60V MAX 60V MAX 120 RS 232 DTE 100 120V 220 240V 1 60 A T 250V 0 80 A T 250V 100 120 220 240 V 10 6 Voltag...

Страница 37: ...r The line fuse is an important safety feature of the Model 331 If a fuse ever fails it is important to replace it with the value and type indicated on the rear panel for the line voltage setting The...

Страница 38: ...330 or Model 340 connector wiring the definition of Pin 3 may be changed with a jumper See Figure 8 7 for jumper location To provide compatibility with sensor input connectors that have been wired fo...

Страница 39: ...sis of the instrument or in the cooling system If one sensor lead must be grounded ground only one lead and ground it in only one place Grounding leads on more than one sensor prevents the sensor exci...

Страница 40: ...voltage together If the leads contribute 2 or 3 to a 10 k reading the error can probably be tolerated When measuring voltage for diode sensors the error in voltage can be calculated as the lead resist...

Страница 41: ...RED Type T Copper vs Copper Nickel Copper BLU Constantan RED Chromel AuFe 0 03 Chromel Gold Chromel AuFe 0 07 Chromel Gold Figure 3 4 Thermocouple Input Definition and Common Connector Polarities 3 6...

Страница 42: ...nd LO terminals The ground terminal is reserved for shielding the heater leads when necessary HEATER OUTPUT HEATER OUTPUT HI HI LO LO 60V MAX 3 7 3 Loop 1 Heater Output Wiring Heater output current is...

Страница 43: ...harmed if the heater resistance is too small It is not recommended because the additional load on instrument power supplies causes noise on internal circuits The second control loop has fewer features...

Страница 44: ...round 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 wit...

Страница 45: ...ower switch is in the off O position CAUTION The sensor must be connected to the rear of the unit before applying power to the Temperature Controller Damage to the sensor may occur if connected with p...

Страница 46: ...oses Press the Setpoint key Press the 7 key twice then press the Enter key Details of setpoint setting are discussed in Paragraph 4 11 77 35 75 35 77 000 0 Off 13 The default setting for the heater is...

Страница 47: ...aragraphs See Figure 4 1 AutoTune Allows selection of closed loop tuning mode AutoTune PID PI P Manual PID or Zone for the currently selected loop Refer to Paragraph 4 9 Loop Toggles the front panel d...

Страница 48: ...o Paragraphs 4 1 4 and 4 3 Press and hold to set display brightness Refer to Paragraph 4 18 Math Allows the user to configure the math features Max Min linear equation and filter Press twice to reset...

Страница 49: ...soon as the key is pressed e g Loop Heater Off and Remote Local Setting Selection Allows the user to select from a list of values During a selection sequence the s or t key are used to select a param...

Страница 50: ...under the Control Setup key All remaining selections in this illustration are made under the Display Format key Display Location 3 Source Units Display Location 1 Source Display Location 2 Source Disp...

Страница 51: ...on 3 Display Location 4 C 331 4 3 eps Figure 4 3 Display Format Definition To configure a display location press the Display Format key to display the following screen Select With Display Location 1 U...

Страница 52: ...the Display Format key Select With Display Location 3 Use the s or t key to increment or decrement through Display Locations 1 thru 4 For this example select Display Location 3 then press the Enter ke...

Страница 53: ...e NTC RTD 7500 10 A Negative Temperature Coefficient NTC RTD log R K Negative Cernox High Temperature Cernox Carbon Glass Germanium Rox and Thermox Thermo 25mV 25 mV NA Thermocouple mV K Positive Chro...

Страница 54: ...mA must be selected for the special sensor input to be available for Input A Press the Enter key Select for InputB Diode Current 1mA Use the s or t key to toggle between 10 A and 1 mA to select the d...

Страница 55: ...d problem is the presence of thermal EMF voltages sometimes called thermocouple voltages in the lead wiring Thermal EMF voltages appear whenever there is a temperature gradient across a piece of volta...

Страница 56: ...4 3 1 to select a room temperature compensation or press the Escape key to return to the normal display 4 4 4 1 Room Temperature Compensation Room temperature compensation is required to give accurat...

Страница 57: ...procedure was performed Yes Perform the room temperature calibration procedure that follows Calibration Procedure 1 Attach a thermocouple sensor or direct short across the input terminals of the therm...

Страница 58: ...ed format for the input type selected Refer to Table 4 1 NOTE The sensor reading of the instrument can always be displayed in sensor units If a temperature response curve is selected for an input its...

Страница 59: ...d 9 being relevant to Rox sensors You are also given the choice of None You may also choose from any appropriate User Curves stored in Curve Numbers 21 thru 41 Data points for resistor curves are deta...

Страница 60: ...ature control systems in a fully integrated package Loop 2 Loop 2 the auxiliary control loop 331S only shares most of the operational features of loop 1 but uses the 1 W analog voltage output as its c...

Страница 61: ...st be set to zero if not wanted Heater range must also be considered as part of tuning when using control Loop 1 Manual PID Tuning Manual tuning is the most basic tuning method The user manually enter...

Страница 62: ...p key and press Enter until the following display appears Select for Loop 1 Control Mode Closed The Power Up setting refers to how the control output will respond after the instrument is powered down...

Страница 63: ...is entered using the numeric keypad which includes the numbers 0 9 and decimal point Proportional has a range of 0 1 to 1000 with a default of 50 Press the Enter key then the Escape key to return to...

Страница 64: ...Escape key to return to the normal display 4 8 4 Setting Manual Heater Power MHP Output Manual Heater Power MHP output is a manual setting of control output It can function in two different ways depe...

Страница 65: ...slightly longer to stabilize after setpoint change than Auto PID Expect some overshoot or undershoot of the setpoint and stable temperature control at the setpoint value Auto PID Sets values for P I...

Страница 66: ...r will use the new setting while it is in the same zone and update to the zone table settings when the setpoint is changed to a value outside that zone To enter parameter values into the zone table pr...

Страница 67: ...er key to accept the new setting You will see the next display Enter for Zone 01 Manual Out 0 00 The MHP Output setting is entered using the numeric keypad which includes the numbers 0 9 and decimal p...

Страница 68: ...Heater Range Off Low Med High Proportional 0 1 1000 Integral 0 1 1000 Derivative 0 200 MHP Output 0 100 Heater Range Off Low Med High Proportional 0 1 1000 Integral 0 1 1000 Derivative 0 200 MHP Outpu...

Страница 69: ...ns Table 1 3 The instrument allows a large setpoint range to accommodate a variety of sensors and units With setpoint expressed in sensor units setpoint range is unlimited The user must determine suit...

Страница 70: ...ut curve is changed while a ramp is in progress both ramping and the heater are turned off NOTE If Ramp is on and the setpoint is set to sensor units the ramping function will remain on but when anoth...

Страница 71: ...her error messages are summarized in Paragraph 8 8 Specifications of heater output are provided in Paragraph 1 X Instrument Specifications Heater theory of operation is provided in Paragraph 2 4 Heate...

Страница 72: ...The following paragraphs detail the math settings in order of appearance 4 14 1 Max Min The Max Min feature captures and stores the highest Max and lowest Min reading taken since the last reset The f...

Страница 73: ...ndependently Number represents a number entered by the user X can be set to an input reading in sensor units or temperature in kelvin or Celsius SP1 represents setpoint of Loop 1 and similarly for oth...

Страница 74: ...larger number of points does more smoothing but also slows the instruments response to real changes in temperature The default number of filter points is 8 which settles in approximately 50 readings o...

Страница 75: ...ment off line Pressing the Alarm key clears latched alarms Non Latching Alarms Often tied to relay operation to control part of a system or experiment The alarm state follows the reading value The dea...

Страница 76: ...he High Alarm Point is entered using the numeric keypad which includes the numbers 0 9 and decimal point For this example enter 100 K Press the Enter key Select for Alm A Alarm Latching Off Use the s...

Страница 77: ...ons Low Alarm High Alarm and Both Alarms Press the Enter key Configuration for Relay 2 is identical to Relay 1 Relay 1 Relay 1 Off Off Manual Off relay remains in normal state High Alarm Low Alarm Bot...

Страница 78: ...into a 100 minimum heater load For further specifications refer to the Loop 1 and 2 comparison table in Paragraph 1 X The analog output has four modes of operation Off Input Manual and Loop 2 If you...

Страница 79: ...ess the Enter key Enter for AnOut 10V Value 100 The 10 V value is entered using the numeric keypad which includes the numbers 0 9 and decimal point For this example we will enter 100 K Press the Enter...

Страница 80: ...utput 10 V Output Manual Mode 100 0 0 V 100 0 User Entry For this example we will choose Bipolar Mode On Press the Enter key Enter for AnOut Manual Out 50 The desired fixed output you want as a percen...

Страница 81: ...be viewed but most cannot be changed from the front panel Alarm Reset and Heater Off are the only keypad functions that remain active when the keypad is locked A 3 digit keypad lock code locks and un...

Страница 82: ...When in the Remote mode the Remote LED will be On 4 20 INTERFACE The Interface key serves three functions set the Serial Interface Baud rate set the IEEE 488 Interface Address and Terminators Model 3...

Страница 83: ...R The following Model 330 commands are not supported in 330 Emulation Mode CUID CURV CURV ECUR KCUR and SCAL Please refer to your Model 330 User s Manual for any additional questions concerning remote...

Страница 84: ...t Display Format Display Location 1 Input A Temp K Display Location 2 Input B Temp K Display Location 3 Setpoint Display Location 4 Heater Output Display Brightness 75 Heater Heater Range Off Input Se...

Страница 85: ...se the number of available curve locations SoftCal generated curves are stored in user curve locations 5 1 1 Curve Header Parameters Each curve has a set of parameters that are used for identification...

Страница 86: ...nal 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...

Страница 87: ...ith every curve When controlling in temperature the setpoint cannot exceed the limit entered with the curve for the control sensor The default is 375 K Set to 9999 K if no limit is required Coeff The...

Страница 88: ...ess the Enter key Press the Escape key anytime during this routine to return to the normal display Select for Edit Curve 21 User Use the s or t key to cycle through the various curves Curve numbers 21...

Страница 89: ...temperature Press the Enter key then the Escape key The new point is automatically put into its proper place in breakpoint sequence NOTE Typing over an existing reading or temperature will replace th...

Страница 90: ...y to cancel or the Enter key to erase the selected user curve You now return to the normal display 5 2 3 Copy Curve Temperature curves can be copied from one location inside the Model 331 to another T...

Страница 91: ...hase a SoftCal calibrated sensor from Lake Shore There are advantages to both methods User When the user can provide stable calibration temperatures with the sensor installed SoftCal calibration elimi...

Страница 92: ...tCal Accuracy With Silicon Diode Sensors A SoftCal calibration is only as good as the accuracy of the calibration points The accuracies listed for SoftCal assume 0 01 K for 4 2 K liquid helium 0 05 K...

Страница 93: ...e 50 K to 100 K are not allowed Point 2 Calibration data point near room temperature 305 K Temperatures outside 200 K to 350 K are not allowed Point 3 Calibration data point at a higher temperature 48...

Страница 94: ...key to select the user curve location where the SoftCal curve will be stored You can choose any of the user curve locations 21 thru 41 Press the Enter key You will see the following message Serial 012...

Страница 95: ...83v 302 500 NOTE If Point 3 is not being used press the Enter key with both settings at their default value to complete the SoftCal calibration Use the numerical keypad to enter the measured data poin...

Страница 96: ...Lake Shore Model 331 Temperature Controller User s Manual 5 12 Advanced Operation This Page Intentionally Left Blank...

Страница 97: ...TROLLER A TALKER transmits data onto the bus to other devices A LISTENER receives data from other devices through the bus The BUS CONTROLLER designates to the devices on the bus which function to perf...

Страница 98: ...upports several command types These commands are divided into three groups 1 Bus Control Refer to Paragraph 6 1 2 1 a Universal 1 Uniline 2 Multiline b Addressed Bus Control 2 Common Refer to Paragrap...

Страница 99: ...ragraph 6 3 and summarized in Table 6 8 6 1 2 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 q...

Страница 100: ...Register is set If disabled the Status Byte Register can still be read by the BUS CONTROLLER by means of a serial poll SPE to examine the status reports but the BUS CONTROLLER will not be interrupted...

Страница 101: ...of the instrument The first program was written in Visual Basic Refer to Paragraph 6 1 4 1 for instructions on how to setup the program The Visual Basic code is provided in Table 6 2 The second progr...

Страница 102: ...Lake Shore Model 331 Temperature Controller User s Manual Figure 6 1 GPIB Setting Configuration Figure 6 2 DEV 12 Device Template Configuration 6 6 Remote Operation...

Страница 103: ...Visual Basic 1 Start VB6 2 Choose Standard EXE and select Open 3 Resize form window to desired size 4 On the Project Menu select Add Module select the Existing tab then navigate to the location on yo...

Страница 104: ...bject dropdown list select General Add the statement Public gSend as Boolean b Double Click on cmdSend Add code segment under Private Sub cmdSend_Click as shown in Table 6 2 c In the Code Editor windo...

Страница 105: ...Set Flag as False strCommand frmIEEE txtCommand Text Get Command strReturn Clear response display strCommand UCase strCommand Set all characters to upper case If strCommand EXIT Then Get out on EXIT E...

Страница 106: ...R LF 6 1 4 4 Quick Basic Program The IEEE 488 interface program in Table 6 3 works with QuickBasic 4 0 4 5 or Qbasic on an IBM PC or compatible running DOS or in a DOS window It assumes your IEEE 488...

Страница 107: ...the GPIB Valid primary addresses range from 0 to 30 00H to 1EH Adding 32 to the primary address forms the Listen Address LA Adding 64 to the primary address forms the Talk Address TA EXAMPLE Selectin...

Страница 108: ...its to the instrument and displays any response If no query is sent the instrument responds to the last query received Type EXIT to exit the program REM INCLUDE c gpib pc qbasic qbdecl bas Link to IEE...

Страница 109: ...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 deci...

Страница 110: ...connected to the instrument with a straight through cable As an example Pin 3 of the DTE connector holds the transmit line and Pin 3 of the DCE connector holds the receive line so the functions comple...

Страница 111: ...rough user programs the instrument issues responses Two or more command strings can be chained together in one communication but they must be separated by a semi colon Only one query is permitted per...

Страница 112: ...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 t...

Страница 113: ...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 COM1 communications port at 9600 Baud U...

Страница 114: ...lean b Double Click on cmdSend Add code segment under Private Sub cmdSend_Click as shown in Table 6 6 c In the Code Editor window under the Object dropdown list select Form Make sure the Procedure dro...

Страница 115: ...ue Loop until Send button pressed gSend False Set Flag as false strCommand frmSerial txtCommand Text Get Command strReturn Clear response display strCommand UCase strCommand Set all characters to uppe...

Страница 116: ...Program CLS Clear screen PRINT SERIAL COMMUNICATION PROGRAM PRINT TIMEOUT 2000 Read timeout may need more BAUD 9600 TERM CHR 13 CHR 10 Terminators are CR LF OPEN COM1 BAUD O 7 1 RS FOR RANDOM AS 1 LE...

Страница 117: ...ly 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 L...

Страница 118: ...curves 21 41 user curves Specify input A or B Sample Query Format Query name Brief description of query Form of the query input INCRV Input Input Curve Number Query INCRV input term a input Syntax of...

Страница 119: ...ode Query 31 FILTER Input Filter Parameter Cmd 31 FILTER Input Filter Parameter Query 31 Command Function Page HTR Heater Output Query 32 HTRST Heater Status Query 32 IEEE IEEE Interface Parameter Cmd...

Страница 120: ...a list of event flags Example To enable event flags 0 3 4 and 7 send the command QESE 143 term 143 is the sum of the bit weighting for each bit Bit Bit Weighting Event Name 0 1 OPC 3 8 DDE 4 16 EXE 7...

Страница 121: ...sents the enable disable mask of the corresponding status flag bit in the Status Byte Register To enable a status flag bit send the command QSRE with the sum of the bit weighting for each desired bit...

Страница 122: ...rm low value Sets the value the source is checked against to activate low alarm deadband Sets the value that the source must change outside of an alarm condition to deactivate an unlatched alarm latch...

Страница 123: ...the data at which the analog output reaches 100 output if bipolar or 0 output if positive only manual value If mode is 2 this parameter is the output of the analog output Example ANALOG 0 1 A 1 100 0...

Страница 124: ...t term Format n Refer to command for description CMODE Control Loop Mode Command Input CMODE loop mode term Format n n loop Specifies which loop to configure 1 or 2 mode Specifies the control mode Val...

Страница 125: ...er Example 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 neg...

Страница 126: ...isplays in current or power Valid entries 1 current or 2 power Example CSET 1 A 1 1 term Control Loop 1 controls off of Input A with setpoint in kelvin CSET Control Loop Parameter Query Input CSET loo...

Страница 127: ...ote commands ACUR ACUR BCUR BCUR The following Model 330 commands are not supported in 330 Emulation Mode CUID CURV CURV ECUR KCUR and SCAL EMUL 330 Emulation Mode Query Input EMUL term Returned off o...

Страница 128: ...current terminator the instrument uses EOI mode uses CR LF as the new terminator and responds to address 4 IEEE IEEE 488 Interface Parameter Query Input IEEE term Returned terminator EOI enable addre...

Страница 129: ...A 0 0 term Sets Input A sensor type to silicon diode INTYPE Input Type Parameter Query Input INTYPE input term Format a input Specifies input to query A or B Returned sensor type compensation term Fo...

Страница 130: ...ery Input LINEAR input term Format a input Specifies which input to query A or B Returned equation varM value X source B source varB value term Format n nnnnnn n n nnnnnn Refer to command for descript...

Страница 131: ...mand Input MNMXRST term Remarks Resets the minimum and maximum data for all inputs MODE Remote Interface Mode Command Input MODE mode term Format n mode 0 local 1 remote 2 remote with local lockout Ex...

Страница 132: ...d for description RAMP Control Setpoint Ramp Parameter Command Input RAMP loop off on rate value term Format n n nnnnn loop Specifies which loop to configure 1 or 2 off on Specifies whether ramping is...

Страница 133: ...its overrange RELAY Relay Control Parameter Command Input RELAY relay number mode input alarm alarm type term Format n n a n relay number Specifies which relay to configure 1 or 2 mode Specifies relay...

Страница 134: ...alue Specifies second sensor units point T3 value Specifies third temperature point U3 value Specifies third sensor units point Remarks Generates a SoftCal curve Refer to Paragraph 5 3 Example SCAL 1...

Страница 135: ...re of this zone P value Specifies the P for this zone 0 1 to 1000 I value Specifies the I for this zone 0 1 to 1000 D value Specifies the D for this zone 0 to 200 mout value Specifies the manual outpu...

Страница 136: ...Lake Shore Model 331 Temperature Controller User s Manual 6 40 Remote Operation This Page Intentionally Left Blank...

Страница 137: ...240 Instrument configured for 240 VAC with Universal European line cord VAC 120 ALL Instrument configured for 120 VAC with U S Power Cord and universal European line cord and fuses for 220 240 settin...

Страница 138: ...ment recalibration with certificate CAL 331 DATA Instrument recalibration with certificate and data ES 2 20 Stycast Epoxy 2850 FT Catalyst 9 20 packets 2 grams each Stycast is a common highly versatil...

Страница 139: ...y times this dead air power rating MAN 331 Model 331 Temperature Controller User s Manual RM 1 2 Half Rack Mounting Kit for One Model 331 Temperature Controller Half length mounting panel and mounting...

Страница 140: ...er and requires no external power supply The High and Low terminals on the controller must be connected to the High and Low terminals marked From Controller on the Model 3003 The binding posts or a du...

Страница 141: ...Lake Shore Model 331 Temperature Controller User s Manual P 331 7 3 bmp Figure 7 3 Model RM 1 2 Rack Mount Kit Options and Accessories 7 5...

Страница 142: ...n head screws from side of instrument 2 Place Instrument on shelf 3 Use 5 64 inch 2 mm hex key to reinstall two 6 32 x 1 4 black button head screws through side of rack into corresponding holes in the...

Страница 143: ...few hundred volts may damage electronic components such as semiconductors thick and thin film resistors and piezoelectric crystals during testing handling repair or assembly Discharge voltages below...

Страница 144: ...e voltage indicator in the window of the line input assembly 10 Connect the instrument power cord 11 Turn the line power switch On l 120 100 120 220 240 V 10 6 Voltage 50 60 Hz 120 VA MAX 100 120V 220...

Страница 145: ...put Relays and Analog Output and RS 232 connectors are defined in Figures 8 2 thru 8 5 For thermocouple connector details refer to Figure 3 4 I I V V C331 8 2 eps Pin Symbol Description 1 I Current 2...

Страница 146: ...Output Lo Figure 8 4 RELAYS and ANALOG OUPUT Terminal Block 1 2 3 4 5 6 7 8 9 RS 232 DTE F 331 8 5 eps Model 331 Temperature Controller Typical Computers DE 9P DTE DB 25P DTE DE 9P DTE Pin Descriptio...

Страница 147: ...out 7 DTR tied to 4 8 CTS in 8 NC 1 DCD in Model 331 to PC Serial Interface PC with DB 25P Model 331 DE 9P Standard Null Modem Cable DE 9S to DB 25S PC DB 25P 5 GND 7 GND 2 RD in 2 TD out 3 TD out 3 R...

Страница 148: ...n and signal names as viewed from the Model 331 rear panel 11 12 10 9 8 7 6 5 4 3 2 1 23 24 22 21 20 19 18 17 16 15 14 13 IEEE 488 INTERFACE SH1 AH1 T5 L4 SR1 RL1 PP0 DC1 DT0 C0 E1 C 331 8 6 eps PIN S...

Страница 149: ...at may potentially require replacement The location of the ICs is shown in Figure 8 7 Input Microcontroller U16 Contains software that configures the inputs takes readings and performs control functio...

Страница 150: ...ration of Input B where DI RE diode resistor and TC thermocouple JMP7 330 340 330 Set at factory to reflect configuration of Input B where 330 1 mA excitation current on Pin 3 of the connector and 340...

Страница 151: ...Lake Shore Model 331 Temperature Controller User s Manual P 331 8 7 bmp Figure 8 7 Location Of Internal Components Service 8 9...

Страница 152: ...ine communication Example program in Paragraph 6 2 7 is ideal for this purpose DE 9 to DE 9 cable Pin to pin connections on all 9 pins Female connectors on both ends DE 9 null modem adapter Test and M...

Страница 153: ...t least 1 hour with 100 k resistors attached to all inputs configured as diode resistor and all thermocouple inputs shorted Connect the Model 331 to the PC via the serial port Verify serial communicat...

Страница 154: ...V terminal from the others and connect to the positive output of the voltage reference Connect the voltage reference negative output to the V I and I terminals 7 Set the voltage reference to provide t...

Страница 155: ...l Off CALREAD Reading 000 003 Calibration Command CALZ A 2 0 003 6 From Table 8 2 select the calibration resistor for the range being calibrated and use the DMM in 4 lead resistance measurement mode t...

Страница 156: ...rts The input circuitry is not adjusted during calibration Instead precision voltages are supplied to each input and mathematical calibration constants are calculated and programmed into the Model 331...

Страница 157: ...ation by dividing the measured value of the reference voltage by the value read in the previous step and provide the result using the CALG command Note that the gain calibration constant will always b...

Страница 158: ...ne the offset calibration constant by dividing the FS value by 10 adding 1 and then negating the result 5 Use the CALZ command to send the offset calibration constant EXAMPLE FS DMM Reading 10 0564 Of...

Страница 159: ...ery Input CALG input type term Format a nn input A B or V type 0 7 or 10 13 Returned value term Format nnnnnnn Refer to command for description CALREAD Six Digit Input Reading Query Input CALREAD inpu...

Страница 160: ...nput CALSAVE term Remarks Saves all CALZ and CALG calibration constants to the E2 prom CALZ Zero Offset Calibration Constant Command Input CALZ input type value term Format a nn nnnnnnn input Specifie...

Страница 161: ...11 38 0 00397 0 1007 9 0 1144 2 906 19 0 0359 0 9116 29 0 0113 0 2859 39 0 00353 0 08969 10 0 1019 2 588 20 0 0338 0 8118 30 0 0100 0 2546 40 0 00314 0 07987 ambient temperature The temperature of the...

Страница 162: ...tance temperature detector based on a ceramic oxy nitride resistance material CGR Carbon Glass Resistor cgs system of units A system in which the basic units are the centimeter gram and second 2 Cheby...

Страница 163: ...c data exchange DDE A method of interprocess communication which passes data between processes and synchronized events DDE uses shared memory to exchange data between applications and a protocol to sy...

Страница 164: ...ing The addressable parallel bus specification is defined by the IEEE initial permeability The permeability determined at H 0 and B 0 initial susceptibility The susceptibility determined at H 0 and M...

Страница 165: ...medium to an applied field H The relationship is given by the following equation B 0 H M for SI and B H 4 M for cgs where H magnetic field strength M magnetization and 0 permeability of free space 4...

Страница 166: ...function of the dependent variable positive temperature coefficient PTC Refers to the sign of the temperature sensitivity For example the resistance of a PTC sensor increases with increasing temperat...

Страница 167: ...rage is taken over one complete cycle Also known as effective value 1 room temperature compensation Thermocouples are a differential measurement device Their signal represents the difference in temper...

Страница 168: ...from a difference in temperature at two points along a circuit as in the Seebeck effect 1 thermocouple A pair of dissimilar conductors so joined at two points that an electromotive force is developed...

Страница 169: ...onomer Fahrenheit Abbreviation F A temperature scale that registers the freezing point of water as 32 F and the boiling point as 212 F under normal atmospheric pressure Originally devised by Gabriel F...

Страница 170: ...48 116 67 243 67 153 15 120 240 151 11 122 04 239 67 150 93 122 22 238 150 123 15 230 145 56 127 59 229 67 145 37 127 78 225 67 143 15 130 220 140 133 15 219 67 139 82 133 33 210 134 44 138 71 209 67...

Страница 171: ...quick comparison between LHe and LN2 is provided in Table C 1 Table C 1 Comparison of Liquid Helium and Liquid Nitrogen PROPERTY LIQUID HELIUM LIQUID NITROGEN Boiling Point 1 atm in K Thermal Conduct...

Страница 172: ...ry effort to protect eyes and skin from accidental contact with liquid or the cold gas issuing from it Protect your eyes with full face shield or chemical splash goggles Safety glasses even with side...

Страница 173: ...09062 0 10191 0 11356 0 12547 0 13759 0 14985 0 16221 0 17464 0 18710 0 19961 0 22463 0 24964 0 27456 0 28701 0 32417 0 36111 0 41005 0 44647 0 45860 0 50691 0 51892 0 55494 0 60275 0 63842 0 67389 0...

Страница 174: ...4506 1 36423 1 38361 1 40454 1 42732 1 45206 1 48578 1 53523 1 56684 1 58358 1 59690 1 60756 1 62125 1 62945 1 63516 1 63943 1 64261 1 64430 20 2 17 10 15 90 14 90 14 00 13 15 12 35 11 55 10 75 10 00...

Страница 175: ...00 0 3 820 4 235 5 146 5 650 6 170 6 726 7 909 9 924 12 180 15 015 19 223 23 525 32 081 46 648 62 980 75 044 98 784 116 270 131 616 148 652 165 466 182 035 198 386 216 256 232 106 247 712 261 391 276...

Страница 176: ...6 3 05322 3 05466 3 05618 3 05780 3 05952 3 06135 3 06330 3 06537 3 06760 3 06968 3 07190 3 07428 3 07685 3 07922 3 08175 3 08447 3 08786 3 09150 3 09485 3 09791 3 10191 3 10638 3 11078 3 11558 3 1208...

Страница 177: ...62 63 64 65 66 3 40482 3 40688 3 40905 3 41134 3 41377 3 41606 3 41848 3 42105 3 42380 3 42637 3 42910 3 43202 3 43515 3 43853 3 44230 3 44593 3 44984 3 45355 3 45734 3 46180 3 46632 3 47012 3 47357...

Страница 178: ...5 110 5 113 5 116 5 119 5 122 5 125 5 128 5 131 5 134 5 137 5 140 5 144 147 5 151 154 5 158 161 5 165 168 5 172 176 180 184 188 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113...

Страница 179: ...6 720200 6 582330 6 442220 6 299900 6 155400 6 008740 5 859960 5 687430 5 512090 5 334130 5 153520 4 970330 4 784590 4 596330 4 405600 4 212440 3 992330 3 769140 3 543070 3 314120 3 082340 2 847790 2...

Страница 180: ...913940 3 821970 3 728520 3 633620 3 537260 3 439460 3 340240 3 239610 3 122930 3 004370 2 884040 2 761910 2 638010 2 512340 2 384920 2 255770 2 124900 1 992320 1 858060 1 705090 1 549970 1 392820 1 2...

Страница 181: ...6 35 8 15 9 75 12 5 16 95 19 3 22 2 26 29 1 31 3 34 5 36 3 49 8 55 4 60 5 65 5 70 5 76 80 85 5 89 5 90 5 94 95 5 100 110 120 130 140 150 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52...

Страница 182: ...80 2 877550 2 776950 2 675700 2 563610 2 450770 2 337230 2 223010 2 097700 1 971630 1 844890 1 706840 1 568040 1 428520 1 277520 1 114900 0 940599 0 754604 0 556906 0 358437 0 170179 0 041150 0 152699...

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