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User`s Guide Model 9302/9304 Cryogenic Temperature Monitor

1. 68 Scientific Instruments Inc Model 9302 9304 The Status Byte Register The Status Enable Register SRE is defined by the mask register for the STB It is set and queried using the Common Commands SRE The logical AND of the SRE and STB registers is used to generate a service request on the GPIB interface 69 Scientific Instruments Inc Model 9302 9304 Remote Commands IEEE488 Common commands The Common Commands are defined by the IEEE 488 2 standard and are supported by the Model 9302 9304 on the all of the remote interface ports The common commands control some of the basic instrument functions such as instrument identification and reset They also provide an instrument status reporting mechanism IDN Query unit Identification Query unit identification string The IDN Query will cause the instrument to identify itself The Model 9302 9304 will return the following string Scientific Instruments 9304 lt device S N gt lt fimware rev code gt Where lt device S N gt is the serial number of the unit and lt firmware rev code gt is the revision level of the firmware code Query Syntax IDN Query Response lt Instrument Identification String gt OPC Operation Complete The OPC command will cause the instrument to set the operation complete bit in the Standard Event SEV status register when all pending device operations have finished The OPC Query places an ASCII
2. ISR Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Biti BitO Alarm Rly1 RlyO SFB SFA Where Bit7 Alarm Indicates that an alarm condition is asserted Use the ALARM commands to query individual alarms Bit6 Rly1 Indicates that Relay 1 has toggled Use the RELAYS command to query individual relays Bit5 RIyO Indicates that Relay 0 has toggled Bit1 to Bit0 SFx Indicates that a sensor fault condition is asserted on an input channel Use the INPUT commands to query the input channels The Instrument Status Enable Register The Instrument Status Enable ISE Register is a mask register It is logically anded with the contents of the ISR in order to set the Instrument Event IE bit in the Status Byte STB register Bits in the ISE correspond to the bits in the ISR defined above 67 Scientific Instruments Inc Model 9302 9304 The Standard Event Register The Standard Event Register ESR is defined by the SCPI to identify various standard events and error conditions It is queried using the Common Command ESR This register is often used to generate an interrupt packet or service request when various I O errors occur Bits in the ESR are defined as follows ESR Bit7 Bite Bits Bits Bits Bit2 Biti Bito OPC QE DE EE CE PWR Where Bit7 OPC Indicates Operation Complete Bit5 QE Indicates a Query Error This bit is set when a syntax error h
3. gt p a Fuse Off AC Power O O d Environmental Conditions Environmental conditions outside of the conditions below may pose a hazard to the operator and surrounding area e Indoor use only e Altitude to 2000 meters e Temperature for safe operation 5 C to 40 C e Maximum relative humidity 80 for temperature up to 31 C decreasing linearly to 50 at 40 C e Power supply voltage fluctuations not to exceed 10 of the nominal voltage e Over voltage category Il e Pollution degree 2 e Ventilation The instrument has ventilation holes in its side covers Do not block these holes when the instrument is operating e Do not operate the instrument in the presence of flammable gases or fumes Operation of any electrical instrument in such an environment is a definite safety hazard 26 Scientific Instruments Inc Model 9302 9304 The User Interface Overview The Model 9302 9304 Cryogenic Temperature monitor s user interface consists of a four line by 20 character Vacuum Fluorescent display and a five key keypad Most features and functions of the instrument can be accessed via this simple and intuitive menu driven interface Complex functions such as downloading a new sensor calibration curve require using one of the remote interfaces The Home Status Display At the root of the instrument s menu tree is the basic Home Status Display This screen shows status information only Figure 6 Mode
4. cece etter ene ieee rene erties naar rr cnn nan rr r rn nan n nr nn a aa 25 Table 17 Function Key Descriptions oooooconnncccnnnnncccnnnnoncccnnnoncccnnnoncccnn non ccc nano nncn canon nr cnn nn n cnc naar nn cn nana nncnnnnns 28 Table 19 Model 9302 9304 Root Menu cooooocccccccoconononoconcnccnnonnnnoncnnnnnnnnnnnn nn nnnnnnnnn nano nn nn rn nnnnnnnannnnnnnnnnnannnes 31 Table 20 Input Channel Setup Menus 0 ccecceeeceececeeeeeeeee eect ee eee ee cece aaaeeeseeeeesecaaeeeeeeeeeesetecnieaeeeeeeteeed 32 Table 21 Analog Output Setup MeNnu cccccceecceceeceeeeeeececeeeaeeeeeeeeeseaaaeaeeeeeeeseccaaaeaeeeeeeeseeecnieeeeereeteeed 34 Table 227 Relay Setup Menus oi Ai 34 Table 23 System Functions MG nu errour diesa aia eaa a it det 35 Table 24 Remote Command Summary coccccccccocccccononcninononcncnonononcnnnnn nn ncnn nn nn rn nano nn rn naar nr cnn naar nn rr naar nrcnnnannninnnns 95 Index of Figures Figure 1 Model 9302 9304 Rear Panel LaYOUt ocococincccccinococcnonononcnnnnnnnnnnn nono nn nn nono rca r nro nn rr nan rra 19 Figure 3 LAN RIS45 Pino escocia lio E EA AAR AAA Ta KA ASAA 21 Figure 6 Model 9302 9304 Front Panel oincccccnnicocicnnococcnonononcnononnonnnn non n nn aran n nn rro aandaa rar rra rn 27 Figure 7 Model 9302 9304 Web Site Status PaYl ooooococinnnccinnnococcconononcnonnnnnnnnnnnno nn nr nano rca rro narran rra 37 Figure 8 Network Configuration Page oooonnnccccnnococinnnoccccnononnoncnonononnn
5. 2 Table 13 Sensor Input Connector Pinout Caution To ensure proper low noise operation cable shields should be connected to the metal backshell of the connector Please refer to the section on shielding and grounding for further information 22 Scientific Instruments Inc Model 9302 9304 Color codes for the Dual Sensor Cable SII part number 402 015 are as follows Input Tha we Curent e Carento o 4 Table 14 Dual Sensor Cable Color Codes The cable used is Belden 8723 This is a dual twisted pair cable with individual shields and a drain wire The shields and drain wire are connected to the DB9 connector s metal backshell in order to complete the shielding connection Four wire connections to the sensor are shown here for Diode and Resistor sensors Vit Four Wire Resistor Sensor Four Wire Diode Sensor VEO _ Sensor Wiring DC offsets can build up in cryogenic temperature measurement systems due to thermocouple effects within the sensor wiring They are commonly referred to as Thermal EMF s Careful wiring can minimize these effects The most effective method of minimizing thermocouple DC offsets is to wire temperature sensors so that connections between dissimilar metals are grouped together For example the connection between sensor leads and cryostat wiring should be kept close together This way the Thermocouple junctions formed by the connection will
6. 36 Scientific Instruments Inc Model 9302 9304 The Model 9302 9304 Web Site The Status Page The Home or Status Page is shown here A S 9304 Cryogenic Temperature Indicator Microsoft Internet Explorer fel File Edit view Favorites Tools Help Q sxx amp a CA DO search sie Favorites A a E las rel 3 Address http 192 168 0 4findex htm v Eco Links gt Google v G Search g Shisblocked 3 Check Autolink gt SI 9304 Cryogenic Temperature indicator Temperature Channel A 188 096K Channel B 14 206K Channel C 196 670K Channel D 4 279K Relay 1 Source ChA Status Off Relay 2 Source ChB Status Off Analog Output Source ChA Status 0 000 Volts Instrument Date 8 23 2006 Time 18 7 47 Status SI9304 12 Scientific Instruments 9304 240012 2 08 Internet Figure 7 Model 9302 9304 Web Site Status Page This page shows the current temperature and alarm conditions for both channels as well as the status of both relays and the analog output Clicking on the Status field of the top navigation bar will refresh this page 37 Scientific Instruments Inc Model 9302 9304 The Network Configuration page The Network Configuration page is accessed by clicking on the Net Config field of the top navigation bar 3 SI 9304 Network Configuration Microsoft Internet Explorer Ob File Edit View Favorites Tools Help A Q sxx A x
7. 1 in the output queue when all pending device operations have completed Command Syntax OPC Query Syntax OPC Query Response 1 70 Scientific Instruments Inc Model 9302 9304 SYSTEM commands SYSTEM commands are a group of commands associated with the overall status and configuration of the Model 9302 9304 rather than a specific internal subsystem SYSTEM DISTC Display Filter Time Constant The SYSTEM DISTC command is used to set or query the display filter time constant The display filter is applied to all reported or displayed temperature data Available time constants are 0 5 1 2 4 8 16 32 or 64 Seconds Command Syntax SYSTEM DISTC lt tc gt Where lt tc gt is the display filter time constant in seconds selected from the following list 0 5 1 2 4 8 16 Query Syntax SYSTEM DISTC Query Response lt tc gt Command Example SYSTEM DISTC 8 This command will set the display time constant to 8 Seconds Query Example SYSTEM DISTC Example Response 2 This indicates that the display filter has a 2 Second time constant Short Form SYST DIST SYSTEM FWREV Instrument Firmware Revision Level Queries the instrument s firmware revision level Query Syntax SYSTEM FWREV Query Example SYSTEM FWREV Example Response 2 08 Indicating that the instrument s firmware is revision level 2 08 Short Form SYST FWR SYSTEM HWREV Instrument Hardware Revision Level Queries the inst
8. 1mA AC 10mV 1 25Hz Autoranged 1mA range used with constant voltage mode sensors 100uA AC 10mV 1 25Hz Autoranged 100HA range used with constant voltage mode sensors 10uA AC 10mV 1 25Hz Autoranged 10HA range used with constant voltage mode sensors 1mA DC 0 2 5VDC 1 0mA DC measurement of 100 Platinum RTD sensors 100uA DC 0 2 5VDC 100pA DC measurement of 1K Ohm Platinum RTDs DC measurement of 10K Ohm 10uA DC 0 2 5VDC 10uA Platinum RTDs or other resistor sensors that use DC current excitation 61 Scientific Instruments Inc Model 9302 9304 Calibration of Silicon Diodes Silicon Diode sensors require the application of a precision 10pA current followed by reading the voltage drop across the device Therefore calibration of a diode requires two steps 1 Calibration of the input voltage reading and 2 Calibration of the 10pA current source Note that the voltage calibration must always be done first since the current source calibration requires a precision voltage reading Diode Voltage Calibration To calibrate the diode voltage range click on the SI Diode V tab and follow the sequence described above to send Gain and Offset values to the instrument The upper target requires connection of a 1 9 Volt source The actual value is between 1 0 Volts and 2 4 Volts If you do not have a precision voltage source you can use a 1 5 Volt battery by using a high precision volt meter to measure it s actual
9. Scientific Instruments Inc Model 9302 9304 Table of Contents Preparing the Monitor for USE oooocccinnccccnnococcconocancnnnncan cnn r nano nn nr nano nanrnnnn ns 1 Model Identification haai eae aeaa aaa aaee aea a a aaia 1 Supplied Items tii iaa a 1 Verify the AC Power Line Voltage Selection ooooooooncnnnnonicinnncaciccnannnos 2 Apply Power to the Monitor ooooccccnnonococcccncnccncononcnncccnnncnnnnnanonocnnnnnnns 2 Factory Default SetU ern n E nano nnnrrnnr nn 3 Technical ASSIStanCe neiii aie aree ae a aee aaa nn aaa ar 4 Returning Equipment cccccccceceeeeeseeeeeaececeeeeeseceaeceeeeeeeseeeenaeess 4 Options and ACCESSOLICS ccccccceceeeeeeeeeeeeeceeeeeteeeeeaeeeeeeeeeseeeeenanes 5 Instrument ACCESSOTICS c cccccceeeeeeeeeeceaeeeceeeeeteeeieaeeeeeeeeneeees 5 Cryogenic Accessories iia dd 5 Specifications Features and Functions ccccccccccesesseseeeeeeeeeeeeeeeeeeees 7 Specification SUMMAIY a ee E AGR 7 InputChannelSz son ta E r EA 10 Constant Current Sensor Excitation ccececseeeeeeeeeeeteeeeneeees 10 Constant Voltage Sensor Excitation eccceeeeeeeeseeeeeeeeeeeeees 10 Supported Sensor Types cccccecececccececeeeeeeseeeeeaeeeeeeeeeeeeeeaaees 12 Sensor Performance SUMMA Y ooiniccccnnnncocinnnonoccnnnoncncnn nn cnn nn 14 Factory Installed Sensors occccconnnccconnocccccnnnoncncnnnancccnnnnccnnnnnnncnnnnnn 16 CalGen Calibrat
10. The Input Channel Configuration Page This page is used to set the characteristics of each input channel including sensor type units and alarm conditions F SI 9304 input Channels Microsoft Internet Explorer File Edit View Favorites Tools Help Q ex X Q x a Search Je Favorites 2 ee E LJ rel 3 Address a http 192 168 0 4finput htm MAA x a Go Google v G Search O E S 15 blocked eS Check K AutoLink gt SI 9304 Cryogenic Temperature indicator Input Channel A Name Channel A Units K Sensor 51410 Diode High Alarm 100 000 Enable No has Low Alarm 10 0000 Enable No yl Input Channel B Name Channel B Units K Sensor RO 105 DC 10uA High Alarm 200 000 Enable No Low Alarm 20 0000 Enable No Input Channel C Name Channel C Units Kv Sensor Pt100 385 High Alarm 300 000 Enable No J Low Alarm 30 0000 Enable No Y Update Cancel Input Channel D Name Channel D Units K Sensor RO 600 AC High Alarm 400 000 Enable No Mil Low Alarm 40 0000 Enable No Y Internet Figure 9 Input Channel Setup Web Page 40 Scientific Instruments Inc Model 9302 9304 The Output Channel Configuration Page Output channels on the Model 9302 9304 include two dry contact relays and an analog output These may be completely configured using this web page System Configuration Page From the System Configuratio
11. 4mK 77K 0 5mK 30K 1 0mK 30K 370nW 77K 2 0uW Moderate 10KQ Platinum DIN43760 16KQ 10uA 300K 390 K 77K 420 K 30K 19Q K 300K 380mQO 77K 50mQ 30K 50mQ 300K 6 2mK 77K 2 8mK 30K 9 8mK 300K 150mQ 77K 18mQ 30K 1 8mQ 300K 4mK 77K 0 5mK 30K 1 0mK 30K 37nW 77K 200nW Moderate Table 9 Sensor Performance for Diodes and Pt Sensors SenVal The sensor output at a given temperature in units of Volts or Ohms depending on the sensor type SenSen The sensor sensitivity at a given temperature in units of Volts Kelvin or Ohms Kelvin depending on the sensor type Example Si410 Silicon Diode T K SenVal V SenSen V K Accuracy V Accuracy K Resolution uV Resolution K 4 1 65 0 0321 163 0 005 15 0 0005 70 1 04 0 00169 132 0 078 15 0 0089 300 0 56 0 00228 108 0 047 15 0 0066 14 Scientific Instruments Inc Model 9302 9304 1 4K 520KQ K 1 4K 240KQ K 1 0K 12600 K Sensor Sensitivity 4 2K 80 3Q9 K 12K 4220 K ee pd TE DiR 77K 2 15Q K oS 300K 0 019 K 300K 0 16Q K 1 4K 7280 1 4K 6750 Measurement 10Q 4 2K 0 580 4 2K 5 10 Accuracy 0 0004 SenVal 77K 14mQ 77K 161mQ 300K 0 020 300K 40ma 1 4K 1 4mK 1 4K 2 2mK memperature 109 4 2K 1 4mK 4 2K 2 2mK eee ee eve 77K 150mK 77K 75mK y 300K 2 1K 300K 295mK AN as 4 2K 11mo 4 2K 46m0 Resolution 0 0001 Senval 77K 0 2ma TIKE ome 300K
12. CALDATA lt index gt NAME lt val gt Where lt index gt is the index of the user installed sensor and lt val gt the sensor s name string The name string must be surrounded with double quotation marks Query Syntax CALDATA lt index gt NAME Query Response lt name gt Where lt index gt is the index of the user installed sensor and lt name gt is the name string for the indexed sensor Query Short Form CALD lt index gt Where lt index gt is the index of the user installed sensor and lt val gt the sensor s name string Query Example CALDATA 3 NAME Example Response User Curve 2 Short Form CALD 89 Scientific Instruments Inc Model 9302 9304 CALDATA TYPE Sensor Type Sets or queries the sensor type at a Sensor Table index Supported sensor types are described above in the Supported Sensors section Command Syntax CALDATA lt index gt TYPE lt stype gt Where lt index gt is the index to the user installed sensor and lt stype gt the sensor type selected from the above list Query Syntax CALDATA lt index gt TYPE Query Response lt stype gt Where lt index gt is the index and lt stype gt is the sensor type Command Example SENT 3 TYPE DIODE This command assigns the Silicon Diode sensor type to the user installed sensor at index 3 Query Example CALDATA 1 TYPE Example Response Diode This response indicates that the sensor at index 1 is a Diode Short Form CALD
13. Si410 series Silicon Diode Temperature Sensors Temperature range 1 5 to 450K RO600 Ruthenium Oxide Sensor 1 kQ RO105 Ruthenium Oxide Sensor 100 kQ Pt100 series Platinum RTD 10040 Ga300 series Gallium Arsenide Sensor Table 3 Cryogenic Accessories Scientific Instruments Inc Model 9302 9304 Scientific Instruments Inc Model 9302 9304 Specifications Features and Functions Specification Summary User Interface Display Type 20 x 4 character or 140x32 graphics VFD Number of Inputs Displayed Model 9302 2 Model 9304 up to 4 Keypad Sealed Silicon Rubber Temperature Display Six significant digits autoranged Display Update Rate 0 5 Seconds Display Units K C F or native sensor units Display Resolution User selectable to seven significant digits Input Channels There are two input channels on the Model 9302 and four on the Model 9304 They are identical and each may be independently configured for any of the supported sensor types Sensor Connection 4 wire differential DB 9 receptacles connect two channels Connections are described in the Sensor Connections section Isolation Sensor circuits are not electrically isolated other internal circuits However there is a single point internal connection to Earth or Shield ground in order to minimize noise coupling Input Protection 30 Volts maximum Supported Sensors Include Type Excitation Tempe
14. Snone Sensor Types are described in the section on Supported Sensors above lt multiplier gt is the temperature coefficient and curve multiplier If this field cannot be identified a value of 1 0 is assumed This field is described in the section Sensor Setup Menu above lt curve units gt is the units of the curve Choices are OHMS VOLTS or LOGOHM The last entry in a calibration curve must be a single semicolon Query Syntax CALCUR lt index gt Query Response lt calibration curve gt Short Form CALC 88 Scientific Instruments Inc Model 9302 9304 CALDATA and SENTYPE Commands The CALDATA commands are used to add delete or edit user installed sensors SENTYPE commands are used to query the name of a factory installed sensor User installed sensors are indexed from zero to 5 Factory installed sensors are indexed from zero to 60 For additional information refer to Appendix A SENT NAME Name for a factory installed sensor Queries the name of a factory installed sensor Query Syntax SENT lt index gt NAME Or SENT lt index gt Query Response lt name gt Where lt index gt is the index of the factory installed sensor and lt name gt is the name string for the indexed sensor Query Example SENT 1 Example Response Scientific Instruments Si410 Short Form SENT CALDATA NAME Name for a user installed sensor Sets or queries the name of a user installed sensor Command Syntax
15. s Manual PN 090 264 SII software CD PN 093 033 Two dual input connector cable assemblies PN 402 015 Relay Aout connector 6 pin terminal block plug PN 231 552 Certificate of Calibration Scientific Instruments Inc Model 9302 9304 Verify the AC Power Line Voltage Selection The AC power line voltage is set to the proper value for your country when the controller is shipped from the factory This setting is marked on the rear panel just above the AC Power Entry module AC power line voltage setting is made by internal component selection Refer to the section on AC Line Voltage Selection for details Apply Power to the Monitor Connect the power cord and turn the monitor on by switching the power switch on the rear panel to the 1 position The front panel will show a Power Up display with the model number and firmware revision While the Power Up display is shown the monitor is performing a self test procedure that verifies the proper function of internal data and program memories remote interfaces and input channels If an error is detected during this process the monitor will freeze operation with an error message display In this case turn the unit off and refer to Appendix B Troubleshooting Guide SI 9304 Firmware Rev 2 08B IP 192 168 0 4 Caution Do not remove the instrument s cover or attempt to repair the monitor Other than the AC line voltage selection jumpers there are no us
16. 0 2m0 300K 0 5m0 0 020 4 2K 30uK 4 2K 50uK Ulli 0 0001 SenVal 77K 1 2mK 77K 0 85mK SenSen 300K 12mK 300K 3 5mK ey 1 0K 42W 1 4K 962pW 1 4K 1 1nW ET ISSIp 4 2K 73nW 4 2K 171nW 4 2K 20nW Magneto lt 2 for H lt 2T Moderate lt 1 for H lt 2T resistance 2 10mV Constant Voltage bias Table 10 Sensor Performance for NTC sensors 15 Scientific Instruments Inc Model 9302 9304 Factory Installed Sensors A listing of the sensors installed in the Model 9302 9304 is given below Additional information about these devices can be found in Appendix A Name Description Cryo con S700 series Silicon Diode Range 1 4 to 495K 10uA constant current excitation Lakeshore Silicon Diode Curve 11 for DT 670 LS DT 670 series diodes Range 1 4 to 500K 10uA constant current excitation Lakeshore Silicon Diode Curve 10 for DT470 LS DT 470 series diodes Range 1 4 to 495K 10uA constant current excitation Cryo con S700 Scientific Instruments Inc 410 Diode Curve Range 1 5 to 450K 10uA excitation DIN43760 standard 1000 Platinum RTD Range 23 to 1023K 1mA excitation 1000Q at 0 C Platinum RTD using DIN43760 Pt1K 385 standard calibration curve Range 23 to 1023K 100A excitation 10KQ at 0 C Platinum RTD Temperature Pt10K 385 coefficient 0 00385 Range 23 to 475K 10uA excitation RhFe 27 1mA Rhodium lron 27Q at 0 C SI RO 105 Ruthenium Oxide sensor AC RO 105 AC exc
17. 2 ya Search Sie Favorites B eo E Laa rel 3 Address http 192 168 0 4 net htm JS o g Mpo Google v G Seach g Eisblocked 3 Check Autolink gt d SI 9304 Cryogenic Temperature indicator Se 3 gt Configuration Net Name 19304 12 IP Address 192 168 o 4 Subnet Mask 255 255 255 0 Default 255 Gateway Address 192 168 0 9 TCP Port 5000 Default 5000 Settings do not take effect until the instrument is reset e l Time Server 192 168 0 9 Optional Name Server 192 es 0 9 Optional Settings do not take effect until the instrument is reset eMail Mail Server Adar max 25 characters From max 25 characters To max 25 characters Mail Port 25 default 25 ChA Off ChB Off Y Che Of M chD Off M MAC Address 00 90 23 00 00 00 Scientific Instruments 9304 240012 MD Internet Figure 8 Network Configuration Page This page is used to set the network parameters for the Model 9302 9304 These parameters are modified by entering new data and clicking on the Submit button 38 Scientific Instruments Inc Model 9302 9304 Note that if you change settings on this page the Model 9302 9304 will reset to the new configuration and disconnect from your web browser You will need to enter a new address in the browser to re connect Configuring the Network Connection The Network Nam
18. 43210 Short Form REL LOW 84 Scientific Instruments Inc Model 9302 9304 RELAYS HIENA Relay High Enable Sets or queries the high temperature enable for the specified relay A relay must be enabled before it can be asserted Command Syntax RELAYS lt num gt HIENA lt status gt Where lt num gt is the number of the relay and is 0 or 1 lt status gt is the status of the high temperature enable lt status gt may be either YES or NO Query Syntax RELAYS lt num gt HIENA Query Response lt status gt Where lt num is the relay number and lt status gt is the setting of the high temperature enable for relay lt num gt lt status gt will be either YES or NO Command Example RELAY 1 HIENA NO Disables the high temperature alarm assertion of relay number 1 Query Example REL 0 HIEN Example Response YES Query Command Example RELAY 1 HIGH HIEN NO Example Response 154 2323 The high temperature alarm set point for relay 1 is reported then the high temperature enable for relay 1 is disabled Short Form REL HIEN 85 Scientific Instruments Inc Model 9302 9304 RELAYS LOENA Relay Low Enable Sets or queries the low temperature enable for the specified relay A relay must be enabled before it can be asserted Command Syntax RELAYS lt num gt LOENA lt status gt Where lt num is the relay number and is 0 or 1 lt status gt is the status of the low temperature enable lt status gt m
19. B ALARM LOEN Example Response NO Query Example INP B ALARM HIENA LOENA Example Response YES NO The high temperature alarm enable for input channel B is reported followed by the low temperature alarm enable Short Form INP lt channel gt ALAR LOEN INPUT VBIAS Input channel sensor bias voltage Sets or queries the constant voltage mode voltage used on the specified input channel This value only applies to sensors that use constant voltage excitation They are indicated by a sensor type of ACR If this query is used with a sensor type other than ACR it will always return N A for not applicable Command Syntax INPUT lt channel gt VBIAS lt volts gt Where lt channel gt is the input channel parameter and lt volts gt is the bias voltage Choices are 10V 1 0 Volt 10mV 10milliVolt 3 3mV 3 33milliVolt 1 0mV 1 0milliVolt Query Syntax INPUT lt channel gt VBIAS Where lt channel gt is the input channel indicator Query Response lt volts gt Command Example INPUT B VBIAS 3 3mV Query Example INP A VBias Example Response 1 0mV Note if the sensor on channel A is not a type ACR the response will always be N A Short Form INP VBIAS 80 Scientific Instruments Inc Model 9302 9304 Relay Commands The relay subsystem includes the two auxiliary relays in the Model 9302 9304 Using the RELAYS commands these relays may be independently configured to assert or clear based on the status of
20. Or an erratic display of temperature Input channel voltage measurement is out of range Ensure that the sensor is connected and properly wired Ensure that the polarity of the sensor connections is correct Refer to the Sensor Connections section Many sensors can be checked with a standard Ohmmeter For resistor sensors ensure that the resistance is correct by measuring across both the Sense and Excitation contacts For a diode sensor measure the forward and reverse resistance to ensure a diode type function Input channel is within range but measurement is outside the limits of the selected sensor s calibration curve Check sensor connections as described above Ensure that the proper sensor has been selected Refer to the Input Channel Setup Menus section Change the sensor units to Volts or Ohms and ensure that the resulting measurement is within the selected calibration curve Refer to the section on Sensor Setup to display the calibration curve 100 Scientific Instruments Inc Model 9302 9304 Temperature Measurement Errors Noise on temperature measurements Possible causes Excessive noise pickup especially AC power line noise Check your wiring and shielding Sensors must be floating so check that there is no continuity between the sensor connection and ground Check for shielding problems by temporarily removing the input connector s backshell If the noise changes significantly
21. Otherwise selections are 1 0V 10mV 3 3mV and 1 0mV 4 AHigh Alarm 200 000 Set point for the High Temperature alarm 5 A High Enable High temperature alarm enable Selections are Yes or Noh No 6 HALow Alarm 200 000 Set point for the Low Temperature alarm Low temperature alarm enable Selections are Yes or 7 ALow Alarm Ena Yesh yo Table 20 Input Channel Setup Menus Temperature Units The Units field line 1 assigns the units that are used to display temperature for the input channel Selections are K for Kelvin C for Celsius F for Fahrenheit and S for sensor units Note that if the S option is selected the actual sensor units will be displayed when the field is deselected Sensor units are V for Volts and for Ohms Sensor Type Selection Line 2 selects the Sensor type for the input channel When this field is selected the scroll keys are used to scroll through all of the available sensor types Factory installed sensors appear first and then user sensors For a list of factory installed sensors refer to Appendix A 32 Scientific Instruments Inc Model 9302 9304 Bias Voltage Selection The Model 9302 9304 supports constant voltage AC excitation for resistor sensors Other sensors including diodes are supported by DC constant current excitation Sensor type ACR indicates an AC resistor sensor that uses constant voltage bias Here the Bias Voltage field will show selections of 1
22. Setup the di or Y keys The cursor will scroll down to show additional lines To select the line at the current cursor position press the Enter key In the case of the above display pressing will cause the monitor to display the input channel A setup or ChA Setup menu If the cursor is positioned at a data entry menu line when the Enter key is pressed the cursor will change into a data selection cursor as follows Indicates that the selection is an enumeration field where sequential choices will be displayed each time the or 4 key is pressed To make the displayed selection press the Enter key To abort the selection process without making any change press the d key Indicates that the selection is a numeric entry field Pressing the or 4 keys will increment or decrement the displayed number To enter the displayed value press the Enter key To abort entry without making any changes press the dk key Key Description 1 From Home screen enter setup menu 2 Within a setup menu Enter data or select a field cursor display will indicate function 1 Scroll Display UP 2 When in a field d selection mode abort entry and return to scroll mode cursor display will indicate function Scroll Display DOWN b Scroll to NEXT selection 1 In data selection mode scroll to PREVIOUS selection 2 Within a setup menu return up the 4 menu tree to the prev
23. TYP 90 Scientific Instruments Inc Model 9302 9304 CALDATA MULTIPLY Calibration Curve Multiplier Sets or queries the Multiplier field for a user installed sensor The multiplier field is a floating point numeric entry and is used to specify the sensor s temperature coefficient and to scale the calibration curve Negative multipliers imply that the sensor has a negative temperature coefficient The absolute value of the multiplier scales the calibration curve For example the curve for a Platinum sensor that has 100Q of resistance at 0 C may be used with a 1000Q sensor by specifying a multiplier of 10 0 Default is 1 0 for sensors with a positive temperature coefficient and 1 0 for a negative coefficient Command Syntax CALDATA lt index gt MULTIPLY lt val gt Where lt index gt is the index to user installed sensor 0 through 5 and lt val gt the multiplier lt index gt is an integer and lt val gt is floating point with a range of 100 0 Command Example CALD 1 MULT 10 1 This command sets the calibration table multiplier for user installed sensor 1 to 10 1 and identifies it as having a negative temperature coefficient Query Syntax CALDATA lt index gt MULTIPLY Query Response lt val gt Where lt index gt is the index and lt val gt is the sensor type multiplier Query Example CALD 2 MULT Example Response 1 000000 This response indicates that the sensor at index 2 has a positive temperature c
24. Where lt num is the relay number and is 0 or 1 lt chan gt is source input channel and may be any of the Model 9304 s four sensor inputs or Model 9302 s two Query Syntax RELAYS lt num gt SOURCE Where lt num is the relay number Query Response lt chan gt Where lt chan gt is the source input channel for relay lt num gt and will be ChA ChB ChC or ChD Command Example RELAY 0 SOUR D Causes relay 0 to be asserted or cleared based on the condition of input channel D Query Example RELAY 1 SOUR Example Response CHC Short Form REL SOUR 82 Scientific Instruments Inc Model 9302 9304 RELAYS HIGHEST Relay High Set Point Sets or queries the temperature setting of the high temperature set point for the specified relay When this temperature is exceeded on the source input channel a high temperature condition will cause the specified relay to be asserted Temperature is assumed to be in the display units of the source input channel There is a 0 25K hysteresis in the assertion of a high or low temperature condition Command Syntax RELAYS lt num gt HIGHEST lt temp gt Where lt num is the relay number and is 0 or 1 lt temp gt is the set point temperature Temperature is a floating point string that may be up to 20 characters Query Syntax RELAYS lt num gt HIGHEST Where lt num is the relay number Query Response lt temp gt Where lt temp gt is the value of the set point for relay l
25. any of the four sensor input channels Relay outputs are dry contact and are available on the rear panel of the instrument The user selectable display time constant filter is applied to input channel temperature data before relay conditions are tested RELAYS Relay Status Query The two auxiliary relays available in the Model 9302 9304 are addressed as 0 and 1 The RELAYS command can be used to query the status of each relay where Relay is clear SF Relay is asserted by a Sensor Fault condition HI Relay is asserted by a high temperature condition LO Relay is asserted by a low temperature condition There is a 0 25K hysteresis in the assertion of a high or low temperature conditions Query Syntax RELAYS lt num gt Query Response lt status gt Where lt num is the relay number and is 0 or 1 lt status gt is the assertion status of relay lt num gt and is selected from the above list Query Example RELAY 1 Example Response HI This response indicating that relay 1 is asserted by a high temperature condition Query Example RELAY 0 Example Response Indicating that relay 0 is not asserted Short Form REL The short form is truncated to three characters since the fourth character is a vowel 81 Scientific Instruments Inc Model 9302 9304 RELAYS SOURCE Relay Input Source Sets or queries the source input channel for a specified relay Command Syntax RELAYS lt num gt SOURCE lt chan gt
26. for each channel selected The dialog box will show the channel s Input Identifier Name String and a chart of current temperature E Channel B The update rate of the chart is locked to the program s Data Logging Interval The section below details how to set this value 49 Scientific Instruments Inc Model 9302 9304 Data Logging The Utility Software will perform data logging on all of the instruments input and control output channels The result is a disk file in Comma Separated Value or CSV format This format is compatible with any data analysis or charting software including Microsoft Excel To initiate data logging select the Data Logging button from the Utility Software s main menu The Data Logging Setup dialog box will now appear Data Logging Setup Dialog Input Channels Output Channels M ChannelA l Channel B Select All l Channel C T Channel D Interval 10 sec Apply ore On this dialog box check the desired channels and set an Interval value in Seconds The minimum interval is 0 1 Second 50 Scientific Instruments Inc Model 9302 9304 When the Start button is clicked a file selection dialog box will be shown Save in Data Logs e maa File name Save as type MSExcel Comma Separated Value Files cs Cancel From this dialog box enter a file name and select the directory where data logging results will be saved As soon as the Save butt
27. in the display units of the selected input channel There is a 0 25K hysteresis in the assertion of a high or low temperature alarm condition Command Syntax INPUT lt channel gt ALARM LOWEST lt temp gt Where lt channel gt is the input channel indicator and lt temp gt is the alarm set point temperature Temperature is a floating point string that may be up to 20 characters Query Syntax INPUT lt channel gt ALARM LOWEST Query Response lt temp gt Where lt channel gt is the input channel indicator and lt temp gt is the temperature setting of the low temperature alarm for lt channel gt Temperature is reported to the full precision of 32 bit floating point Command Example INP A ALARM LOW 100 5 Sets the low temperature alarm set point for input channel A to 100 5 Query Example INP B ALARM LOW Example Response 25 43210 If the display units setting for input channel B are Celsius this response is also in units of Celsius Short Form INP lt channel gt ALAR LOW INPUT ALARM HIENA Alarm High Enable Sets or queries the high temperature alarm enable for the specified input channel An alarm must be enabled before it can be asserted Command Syntax INPUT lt channel gt ALARM HIENA lt status gt Where lt channel gt is the input channel indicator and lt status gt is the status of the high temperature alarm enable lt status gt may be either YES or NO Query Syntax INPUT lt channel gt ALARM HIENA Quer
28. is used to separate the functions lt subsystem gt lt function gt lt white space gt lt data gt lt function gt lt white space gt lt data gt lt terminator gt Command headers immediately followed by a question mark are queries After receiving a query the instrument interrogates the requested function and places the response in its output queue The output message remains in the queue until it is read or another command is issued 66 Scientific Instruments Inc Model 9302 9304 Query commands are used to find out how the instrument is currently configured They are also used to get results of measurements The output queue must be read before the next command is sent For example when you send the query you must follow it with an input statement Truncation of Keywords If a keyword contains more than four characters it may be truncated to four or less characters to simplify programming The truncated form of a keyword is the first four characters of the word except if the last character is a vowel If so the truncated form is the first three characters of the word SCPI Status Registers The Instrument Status Register The Instrument Status Register ISR is queried using the SYSTEM ISR command The ISR is commonly used to generate a service request GPIB when various status conditions occur In this case the ISR is masked with the Instrument Status Enable ISE register The ISR is defined as follows
29. justified in order to display the maximum number of significant digits possible SO C If the Input Channel has been disabled a blank display is shown Temperature units are selected in the individual input channel setup menus Temperature Units may be K C or F When Sensor Units S is selected the raw input readings are displayed These will be in Volts or Ohms Table 18 Temperature Units Sensor Fault Condition A sensor fault condition is identified by a temperature display of seven dash characters as shown here The sensor is open disconnected or shorted Reading Out of Range Condition If a temperature reading is within the measurement range of the instrument but is not within the specified Sensor Calibration Curve a display of seven dot characters is shown 30 Scientific Instruments Inc Model 9302 9304 Instrument Setup Menus The root of the instrument s setup menus is accessed by pressing the Enter key from the Home display The Root Menu The Root Menu displays the list of sub menus that are used to configure the instrument Press the Enter key to descend into the sub menu or the 4 key to return to the Home Status display Selections in the root menu are as follows Model 9302 9304 Root Menu 1 ChA Setup M Press Enter to setup input channel A 2 ChB Setup Setup input channel B 3 Chc Setup Setup i
30. primitive sensor units In the case of sensor units the instrument will determine if the actual units are Volts or Ohms based on the actual sensor type selected for the input channel Query Syntax INPUT lt channel gt UNITS Where lt channel gt is the input channel indicator Query Response lt units gt Where lt units gt is the display units indicator which will be K C F V for Volts or O for Ohms Command Example INPUT B UNITS F Query Example INP A UNIT Example Response K Query Example INP A TEMP UNIT Example Response 27 9906K Short Form INP UNIT 74 Scientific Instruments Inc Model 9302 9304 INPUT ISENIX Installed Sensor index Sets or queries the sensor index number assigned to an input channel for factory installed sensors Sensor index zero indicates that there is no sensor connected to the selected input channel This will disable all readings on the channel Refer to Appendix A for a description of sensors indices etc Note The use of the ISENIX command to assign a factory installed sensor and the USENIX command to assign a user sensor are preferred to the use of the obsolete SENIX command The SENTYPE command may be used to query the name of a factory installed sensor at a specific index Command Syntax INPUT lt channel gt ISENIX lt ix gt Where lt channel gt is the input channel parameter and lt ix gt is the desired sensor index Query Syntax INPUT lt channel gt IS
31. sensors is extremely high in the low temperature end of their range Therefore the reduced measurement accuracy does not degrade temperature measurement accuracy 2 The low current settings are required since sensor self heating at low temperature is a very significant source of errors Table 5 NTC Resistor Measurement Accuracy In order to minimize large jumps in self heating the Model 9302 9304 uses current sources to cover the 1 0mA to 10nA in steps of 5 power 11 Scientific Instruments Inc Model 9302 9304 Supported Sensor Types A complete list of the sensor types supported by the Model 9302 9304 is shown below Excitation Current Sensor Type Voltage Resistance NTC resistors including ACR 10 to 1MQO k Ruthenium Oxide Cernox Typical Use R16K10UA PTC NTC Resistors R8K10UA ae r PTC NTC Resistors R6K100UA Platinum 1000 R2K100UA Platinum 1000 R625R1MA Pt 100 gt 800K R312R1MA 3120 Cl 1 0mA Pt 100 lt 800K Table 6 Supported Sensors Bias types are Cl Constant Current sensor excitation CV Constant Voltage sensor excitation Voltages of 10 0mV 3 3mV and 1 0mV RMS may be selected Excitation current autoranges from 1 0mA to 10nA in order to maintain the selected voltage Silicon Diode Sensors Silicon Diode sensors 2 volt diodes are configured with a 10uA current source excitation and a 2 5 Volt unipolar input voltage range Gallium Arsenide Diode Sens
32. string for a user installed CALDATA NAME sensor CALDATA NAME CALDATA TYPE Sets or queries the sensor type for a user installed CALDATA TYPE sensor CALDATA MULTIPLY Sets or queries the Multiplier for a user installed sensor CALDATA MULTIPLY SENTYPE Queries the name string for a factory installed sensor SENTYPE NAME SENTYPE NAME Please refer to Appendix A Table 24 Remote Command Summary 95 Scientific Instruments Inc Model 9302 9304 Appendix A Installed Sensor Curves Factory Installed Curves The following is a list of factory installed sensors and the corresponding sensor index ISENIX ISENIX Name Description 0 None No Sensor Used to turn the selected input channel off 1 Cryocon 700 Cryo con 700 series Silicon Diode Range 1 4 to 500K 10uA constant current excitation 2 LS DT 670 Lakeshore DT 670 series Silicon Diode Curve 11 Range 1 4 to 500K 10uA constant current excitation 3 LS DT 470 Lakeshore DT 470 series Silicon Diode Curve 10 Range 1 4 to 500K 10uA constant current excitation 5 SI 410 Diode Scientific Instruments Inc 410 Diode Curve Range 1 5 to 450K 10u4A excitation 20 Pt100 385 DIN43760 standard 100Q Platinum RTD Range 23 to 873K 1mA excitation 91 PHK 385 10004 at 0 C Platinum RTD using DIN43760 standard calibration curve Range 23 to 1023K 100uA excitation 22 PHOK 385 10KQ at 0 C Platinum RTD Temper
33. that the instrument will remain within specification for the next calibration interval This criterion for re adjustment provides the best measure of the instrument s long term stability Performance data measured using this method can easily be used to extend future calibration intervals Minimum Required Equipment All calibrations require a computer with an RS 232 or IEEE 488 connection to the instrument Additionally reference standards are required for each input range as follows e The Silicon Diode input range Calibration Type 110UA and V10UA requires voltage references of 0 5 and 1 5 Volts DC and a resistance standard of 100KQ e The Constant Voltage AC resistance ranges Type AC10UA AC100UA and AC10UA require the use of 100KQ 10KQ 1KQ 1000 and 100 resistances e The 100Q Platinum range Type R1MA requires a 1000 and a 100 resistor e The 10000 range Type R100UA requires 1K Q and 100 Q resistors e The 10 0000 range Type R10UA requires 10KQ and 1KA resistors The test equipment recommended for complete calibration is a Fluke 5700A DMM calibrator 57 Scientific Instruments Inc Model 9302 9304 The Basic Calibration Sequence You must first connect the Model 9302 9304 to a computer via the RS 232 Serial or LAN interface and then run the Utility Software provided with the controller The Utility Software must be version 7 4 2 or higher From the start up menu of the Utility Software click the Connect butt
34. the Model 9302 9304 This is done by modifying the TCP IP settings in the PC to have an IP of 192 168 0 xxx where lt xxx gt is in the range of 0 to 255 excluding 4 The Model 9302 9304 address Once connected you may change the network configuration of the Model 9302 9304 to have any desired values x NOTE The Model 9302 9304 network configuration parameters may be reset to the factory default values by executing the LAN Reset sequence from the front panel This will restore the IP address to 192 168 0 4 as well as other network settings TCP Data Socket Configuration In order to communicate with the Model 9302 9304 in the SCPI command language you must configure a TCP data socket application in your PC using remote port 5000 This will allow you to communicate with the Model 9302 9304 in the same ASCII command language as the RS 232 port 64 Scientific Instruments Inc Model 9302 9304 RS 232 Configuration The user can select RS 232 Baud Rates between 300 and 38 400 The factory default is 9600 The Baud Rate can be changed from the instrument s front panel by using the SYS menu Other RS 232 communications parameters are fixed in the instrument They are set as follows Parity None Bits 8 Stop Bits 1 Mode Half Duplex The RS 232 interface uses a New Line or Line Feed character as a line termination In the C programming language this character is in or hexadecimal OxA When sending strings to the moni
35. voltage The lower target requires connection of a 0 5 Volt source The actual value is between zero Volts and 0 6 Volts If you do not have a precision voltage source you can short the input channel for zero volts Constant current Source Calibration Calibration of the constant current source is performed by using the SI Diode I tab On this screen only an upper target value is required since the current source only requires a gain term The upper target requires connection of a 100KO resistor The actual value should be within 10 of 100KQ Calibration of DC resistors Resistor sensors that use direct current excitation are calibrated by using the 1mA DC 100uA DC and 10uA DC tabs Resistors required for calibration are as follows a 1mA DC Upper 1000 Lower 100 a 100uA DC Upper 1 000 Q Lower 100 Q a 10uA DC Upper 10 000 Q Lower 1 000 Calibration of AC resistors Resistor sensors that use auto ranged AC excitation are calibrated by using the 1mA AC 100uA AC and 10uA AC tabs Resistors required for calibration are as follows a 1mA AC Upper 1000 Lower 100 a 100uA AC Upper 1 000 Q Lower 100 Q a 10uA AC Upper 10 000 Q Lower 1 000 62 Scientific Instruments Inc Model 9302 9304 Remote Operation Remote Interface Configuration The Model 9302 9304 has two remote interfaces The 10 BaseT Ethernet LAN and the RS 232 Connection to these interfaces is made on the rear pane
36. 0 10 0mV 3 3mV and 1 0mV to indicate the voltage that is held on the sensor The Model 9302 9304 has an autoranging current source that will maintain the selected voltage For sensor types other than ACR the Bias Voltage field will show N A for not applicable Additional information on excitation voltages and currents is given in the section Input Channels Setting a Temperature Alarm The Alarm lines are used to setup alarm conditions The Model 9302 9304 allows alarm conditions to be assigned independently to any of the input channels High temperature low temperature and sensor fault alarms may be entered and enabled or disabled Note that there is a 0 25K hysteresis in the assertion of high and low temperature alarms Alarm conditions are indicated on the front panel by the Alarm LED and if enabled They are also reported via the remote interfaces Pressing the 4 key will return to the Root Menu 33 Scientific Instruments Inc Model 9302 9304 The Analog Output Menu The Model 9302 9304 s analog output is programmed from this menu It is selected from the Root Menu Analog Output Menu 1 Channel ChA by Select the controlling input source channel Enable th Selecti 2 Analog Enable Yes hy ous aa analog output Selections are 3 Offset 300 000 H Offset temperature 4 Gain 0 50000 Gain unit less Table 21 Analog Output Setup Menu Setting the Analog Ou
37. 02 9304 series is 2 08B Current Hardware Revision Level As of January 9 2006 the current hardware revision level for the Model 9302 9304 series is B Hardware cannot be upgraded in the field Returning Equipment If an instrument must be returned to Scientific Instruments for repair or recalibration a Return Material Authorization RMA number must first be obtained from the factory This may be done by Telephone FAX or e mail When requesting an RMA please provide the following information 1 Instrument model and serial number 2 User contact information 3 Return shipping address 4 Ifthe return is for service please provide a description of the malfunction If possible the original packing material should be retained for reshipment If not available consult factory for packing assistance SII s shipping address is Scientific Instruments Inc 4400 West Tiffany Drive West Palm Beach FL 33407 Scientific Instruments Inc Model 9302 9304 Options and Accessories Instrument Accessories RS 232 Null Modem Cable 6 AC Power Cord Terminal block for Analog Output and Relay connections Dual Sensor Cable 2 x 8 foot Shielded Sensor Connector Kit DB9 Panel Mount hardware kit See Appendix C Bench top instrument stand See Appendix C Tilt stand and carry handle Additional User s Manual CD Table 2 Model 9302 9304 Instrument Accessories Cryogenic Accessories
38. 4 Instrument Accessories oooooccccccccocononoconcnccnonnononncnnnnnnnnnnennnnnnnnnnnnnannnnnnnnnnnnnannnes 5 Table 3 Cryogenic ACCESSONICS ancien datane ee eis ade mc ede iat a eek oe feed eae ee 5 Table 4 Voltage Bias Selectos ei 10 Table 5 NTC Resistor Measurement Accuracy c coococcccconocccccononcccnnnnnnccnnnnnnnncnn nn nn nc naar n rc cnn nn nn cn naar nr cc naar nnncnnnns 11 Table 6 Supported Sensors iii ri ali o Edito tdo 12 Table 7 PTC Resistor Sensor ConfiguratiON oooooccccnnnnnccnnnnaccccnononcccnnnoncccnnnnncccnn nan nncc nano nn cnn nan nn nc nnanncnnnnnns 13 Table 8 NTC Resistor Sensor Configuration oonomccccnnnnnccnnnnoccccnnnoncccnnnoncnnnnnnncncnn ano nncnn nan n cnc naar nncc naar nncninnns 13 Table 9 Sensor Performance for Diodes and Pt Senso0FS ococcocccccnccccnconononccnnncncnnonnononncnnnnnnnannnnnnnnnnnnnnnannns 14 Table 10 Sensor Performance for NTC sensors cooooocccccccccoconononoconcnncnnonnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnannnnnnnnnnnnnnnannes 15 Table 11 Factory Installed S nsors 00 eds 16 Table 12 AC Power Line FUSES cc lr it Et aaa 20 Table 13 Sensor Input Connector PiNQUt ooococccnnonocccnncncconnnononccnnnnonnnnnnononnnnnnnnnnnnnn nn nn nnnnnnnnnnnnnnnnnnrnnnnnnnes 22 Table 14 Dual Sensor Cable Color CONS ooocococococcconccccoconononccnnnnnnnnnnnnnoncnnnnnnnnnnnnnnnncnnnnnnnannnnnnnnnnnnnannnes 23 Table 15 R5 232 Connect ciu dd dr ti a is tic ease 24 Table 16 Relay Connector Pinout 0
39. 4 also supports almost all types of Negative Temperature Coefficient NTC resistive sensors Using AC constant voltage excitation these sensors can be used down to extremely low temperatures Examples of NTC resistor sensors include Ruthenium Oxide Cernox Carbon Glass Germanium and Thermistors Calibration tables may be entered either directly in Ohms or in base 10 Log of Ohms A table of recommended setups for various types of NTC resistors sensors is shown here ACR o Germanium ACR O ACR O AGR O Toson ACR 1 0 to 10 0mV AC LogOhm Table 8 NTC Resistor Sensor Configuration 13 Scientific Instruments Inc Model 9302 9304 Sensor Performance Summary Sensor Type Input Configuration Sensor Sensitivity Measurement Accuracy Temperature Measurement Accuracy Measurement Resolution Temperature Resolution Power Dissipation Magneto resistance Silicon Diode 2 5V 104 A 6250 1 0mA 31250 1004A 300K 2 4mV K 77K 1 9mMV K 4 2K 30mV K 80uV 0 00005 SenVal 80uV 0 00005 SenVal SenSen 15uV SenSen 0 0020 SenSen 4 2K 17uW 77K 12uW Very Large 100Q Platinum DIN43760 800K 0 360 K 300K 0 39Q K 77K 0 42Q K 30K 0 19Q K 0 004Q 0 0001 SenVal 0 0040 0 0001 SenVal SenSen 30K 3 7uW 77K 20uW Moderate 10000 Platinum DIN43760 600K 3 7Q K 300K 3 9Q K 77K 4 20 K 30K 1 9Q K 600K 4mK 300K
40. 9304 Input Channels There are two independent multi purpose input channels on the Model 9302 and four on the Model 9304 each of which can separately be configured for use with any supported sensor The Sensor Type is selected by the user via the microprocessor Values of excitation current voltage gain etc will be determined by the microprocessor and used to automatically configure the channel There are no internal jumpers or switches Constant Current Sensor Excitation Cryogenic sensors including Diode and Platinum devices require a constant current excitation To support this the Model 9302 9304 has a constant current excitation mode with three selectable outputs of 10u4A 100u4A and 1 0mA DC The maximum compliance of the constant current source is 2 45V Temperature is measured with diode type sensors by providing a 10uA excitation current and reading the resulting voltage The Model 9302 9304 uses a Ratiometric bridge technique to measure resistor sensors Here the measurement is the ratio between the sensor resistance and an internal calibration standard resistance This effectively cancels the DC drift and electronic noise associated with the internal voltage reference and constant current source circuitry Resistor sensors may use any of the three constant current settings Constant Voltage Sensor Excitation A unique feature of the Model 9302 9304 is the constant voltage excitation mode where current applied to the senso
41. COMMANS esia naear oere dida dames 71 INPUT Commands eaaa tdi andina 73 Relay GommMmandS 0 ste eee aaa aR An e ad itd ida 81 CALCUR COMMANdS oaa aaa a a AAN an CERA Aaaa EATARRA ANAA SARAT 87 CALDATA and SENTYPE Commands cccceeceeeeeeneeeeteenaees 89 Network Commands ccccceeeeeeeeceeceeeeeeeseccneaeeeeeeeeeeseesenaeeneess 92 Appendix A Installed Sensor Curves ooooocococccccccccccononnoncnnnnncnnnnnann nn nnnnnn 96 Factory Installed CUIVES rraian aaa aR AA a TERA AARS AREA 96 Scientific Instruments Inc Model 9302 9304 User Installed Sensor CurveS ccccccccceceeceeceeeeeeeseceeaeeeeeeeeeeeeteenaees 97 Sensor Curves On CD eieiei n ninae taaa a enait a aaea aaa naia 98 Appendix B Troubleshooting Guide c ccceceeeeeeeeceeeeeeeeeeeenseneeeeees 100 Error DISPIAYS ean acid E EA 100 Temperature Measurement Errors cccccceececeeeeeeeeeeeeeneeeeeeeeeeeees 101 Remote I O problems casitas da ta 102 Appendix C Enclosure Options is eoi aaa eea aai aaasta 104 Panel MOUNTINO ecaa a E 104 Panel Cutouts n esni aea sche sides a ated a e eaaa aaa a a aAA 104 Panel Mount Kitare aaa a aaa a aaa a aaa aiaa 104 IMStHUMENE Sais ss ies o a tidad ita 105 iii Scientific Instruments Inc Model 9302 9304 Index of Tables Table 1 Model Identification 2 0 0 2 2c cecececcccce cece cece a ere eee aeaeceeeee eae a a E eaa at aa e enie anaE 1 Table 2 Model 9302 930
42. ENIX Where lt channel gt is the input channel indicator Query Response lt ix gt Where lt ix gt is the sensor index for the selected input channel If the index is invalid a value of 1 will be returned Command Example INPUT B SENIX 0 This command sets the sensor index for input channel B to zero disabled Query Example INP A SENIX Example Response 02 This indicates that sensor 02 is assigned to input channel A The name of factory installed sensor 02 may be accessed using the SENTYPE commands Short Form INP SEN 75 Scientific Instruments Inc Model 9302 9304 INPUT USENIX User Sensor index Sets or queries the sensor index number assigned to an input channel for user installed sensors Refer to Appendix A for a description of sensors indices etc An index number of 0 through 3 indicates user sensor curves 0 through 3 Note The use of the ISENIX command to assign a factory installed sensor and the USENIX command to assign a user sensor are preferred to the use of the obsolete SENIX command The CALD command may be used to query information about the user installed sensor curves Command Syntax INPUT lt channel gt USENIX lt ix gt Where lt channel gt is the input channel parameter and lt ix gt is the desired sensor index Query Syntax INPUT lt channel gt USENIX Where lt channel gt is the input channel indicator Query Response lt ix gt Where lt ix gt is the sensor index for
43. K hysteresis built into the high and low temperature alarms Analog Output The Model 9302 9304 has a zero to 4 096 Volt analog output that can be scaled to the current temperature reading on any selected input channel The Analog output has an output impedance of 600 Ohms The formula used to scale the output voltage is Output Temperature Offset x Gain Relay Outputs There are two auxiliary dry contact relay outputs available on the rear panel They may be independently asserted upon a high or low temperature condition on any selected input channel Normally open contacts are available at the rear panel Contact ratings are 1 Amp 24VDC There is a 0 25K hysteresis built into the high and low temperatures Remote Interfaces 10 BaseT Ethernet and RS 232 interfaces are standard on the Model 9302 9304 All functions and read outs available from the instrument may be completely controlled by any of these interfaces The 10 BaseT Ethernet connection is made via the RJ 45 connector on the rear panel The Serial port is an RS 232 standard null modem with male DB9 connector Rates are 9600 38 400 and 57 200 Baud The programming language used by the Model 9302 9304 is identical for all interfaces and is SCPI language compliant The Standard Command Protocol for programmable Instruments SCPI is a sub section of the IEEE 488 2 standard and is a tree structured ASCII command language that is commonly used to program laboratory i
44. MAC address 92 SMTP 63 subnet mask 63 64 TCP IP 63 64 TIMEP 63 Factory Defaults 3 64 restoring 29 36 64 setting 3 firmware 9 revision level 4 Scientific Instruments Inc Model 9302 9304 fuse 19 20 Fuse Replacement 20 hardware revision level 4 IEEE 488 18 43 70 input channels 10 73 81 94 Instrument Calibration 57 Calibration Interval 57 Calibration Services 57 Password 58 Procedure 57 Instrument Stand 105 Instrument Status Enable 67 Instrument Status Register 67 IP address 92 ISE 67 68 ISR 67 68 LabView drivers 4 LAN 21 87 configuration 36 connection 21 crossover cable 21 64 102 IP 36 patch cable 21 64 102 reset 36 LED indicators 29 Multiplier field 13 Network Configuration 39 OPC command 70 Panel Mount cutout 104 kit 104 PTC Resistor Sensor 12 Ratiometric 10 Relay commands 81 Connection 25 connector 1 5 8 Index 2 display 37 enable 41 85 86 hysteresis 18 81 LED 29 low temperature 86 menu 34 outputs 8 18 query 81 setpoint 34 41 83 84 setup 31 34 41 source 41 82 95 status 67 81 type 8 25 Returning Equipment 4 RS 232 18 35 configuration 65 Connection 24 Safety Concerns 25 Safety Symbols 26 SCPI 18 command header 66 common command 66 compound command 66 keyword truncation 67 sensor type 95 Sensor bias voltage 33 calibration curve 43 46 48 87 88 95 connection 22 constant voltag
45. System Configuration Page The Resolution field is used to select the number of significant digits to the right of the decimal point for all temperature displays Choices are 1 2 3 or Full Selection of Full will left justify temperature displays for the maximum display width Time constant is an averaging filter that can be applied to temperature displays It is in units of seconds The internal data logging capability can be configured from the Data Logging form When enabled internal logging will proceed continuously at the selected interval 42 Scientific Instruments Inc Model 9302 9304 Utility Software Utility software can be used to control and configure the instrument via the RS 232 LAN USB or IEEE 488 interface It runs under all versions of the Windows operating system This software provides several useful functions including 1 2 8 Real time strip charts of temperature Data Logging This function allows the user to record data from the instrument at a specified sample rate The resulting file is compatible with most spreadsheet and data analysis software Download or upload sensor calibration curves The software will accept curves in Cryo con CRV Lakeshore 340 or Scientific Instrument s txt format In fact it will read almost any table of temperature vs sensor units CalGen function is implemented This function allows the user to fit an existing sensor calibration curve to one two or
46. T ALARM HIGHEST Sets or queries the temperature setting of the high temperature alarm for the specified input channel INPUT ALARM LOWEST INPUT ALARM LOWEST Sets or queries the temperature setting of the low temperature alarm for the specified input channel INPUT ALARM HIENA INPUT ALARM HIENA Sets or queries the high temperature alarm enable for the specified input channel INPUT ALARM LOENA INPUT ALARM LOENA Sets or queries the low temperature alarm enable for the specified input channel 94 Scientific Instruments Inc Model 9302 9304 Command Function Sensor Calibration Curve CALCUR CALCUR Command Commands Sets or queries sensor calibration curve data Function Relay Commands RELAYS RELAYS SOURCE RELAYS SOURCE Relay Status Query Sets or queries the source input channel for a specified relay RELAYS HIGHEST RELAYS HIGHEST Sets or queries the temperature setting of the high temperature set point for the specified relay RELAYS LOWEST RELAYS LOWEST Sets or queries the temperature setting of the low temperature set point for a specified relay RELAYS HIENA RELAYS HIENA RELAYS LOENA RELAYS LOENA Sets or queries the high temperature enable for the specified relay Sets or queries the low temperature enable for the specified relay Sensor Setup Commands CALDATA Sets or queries the name
47. User s Guide Model 9302 9304 Cryogenic Temperature Monitor SCIENTIFIC INSTRUMENTS INC 4400 W Tiffany Drive West Palm Beach FL 33407 Tel 561 881 8500 Fax 561 881 8556 www scientificinstruments com Copyright 2006 Scientific Instruments Inc All Rights Reserved Printing History Edition 5b July 2006 Certification Scientific Instruments Inc SII certifies that this product met its published specifications at the time of shipment SII further certifies that its calibration measurements are traceable to the United States National Institute of Standards and Technology NIST Warranty This product is warranted against defects in materials and workmanship for a period of one year from date of shipment During this period SII will at its option either repair or replace products which prove to be defective For products returned to SII for warranty service the Buyer shall prepay shipping charges and SII shall pay shipping charges to return the product to the Buyer However the Buyer shall pay all shipping charges duties and taxes for products returned to SII from another country Warranty Service For warranty service or repair this product must be returned to a service facility designated by SIl Limitation of Warranty The foregoing warranty shall not apply to defects resulting from improper or inadequate maintenance by the Buyer Buyer supplied products or interfacing unauthorized modification or m
48. always in Kelvin The format of an entry is lt sensor reading gt lt Temperature gt Where lt sensor reading gt is a floating point sensor reading and lt Temperature gt is a floating point temperature in Kelvin Numbers are separated by one or more white spaces NOTE Using the Ethernet or RS 232 interface each line must be terminated by a New Line a Carriage Return a Line Feed or a Null character Floating point numbers may be entered with many significant digits They will be converted to 32 bit floating point This supports about six significant digits The last entry of a table is indicated by a semicolon character with no values in the numeric fields NOTE All curves must have a minimum of two entries and a maximum of 200 entries Entries may be sent to the monitor in any order The unit will sort the curve in ascending order of sensor reading before it is copied to Flash RAM Entries containing invalid numeric fields will be deleted before they are stored The following is an example of a calibration curve transmitted to the monitor via the LAN interface CALCUR 1 n Good Diode n Diode n 1 0 n volts n 0 34295 300 1205 n 0 32042 273 1512 n 0 35832 315 0000 n 1 20000 3 150231 n 1 05150 8 162345 n 0 53234 460 1436 n An The monitor would sort the above table in ascending order of volts then write it to FLASH memory as user curve 1 The curve name will be Good Diode and the native units are volt
49. as occurred on a remote query It is often used for debugging Bit4 DE Indicates a Device Error Bit3 EE Indicates an Execution Error This bit is set when a valid command was received but could not be executed An example is attempting to edit a factory supplied calibration table Bit2 CE Indicates a Command Error This bit is set when a syntax error was detected in a remote command Bit0 PWR Indicates power is on The Standard Event Enable Register The Standard Event Enable Register ESE is defined by the SCPI as a mask register for the ESR defined above It is set and queried using the Common Command ESE Bits in this register map to the bits of the ESR The logical AND of the ESR and ESE registers sets the Standard Event register in the Status Byte STB The Status Byte The Status Byte STB is defined by the SCPI and is used to collect individual status bits from the ESE and the ISR as well as to identify that the instrument has a message for the host in its output queue It is queried using the Common Command STB Bits are defined as follows STB Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 BitO RQS SE MAV IE Where Bit6 RQS Request for Service Bit5 SE Standard Event This bit is set as the logical AND of the ESR and ESE registers Bit4 MAV Message Available Bit3 IE Instrument Event This bit is set as the logical AND of the ISR and ISE registers
50. ature coefficient 0 00385 Range 23 to 873K 10uA excitation 23 RhFe 27 1mA Rhodium lron 27Q at 0 C 1mA DC excitation 1 5 to 873K SI RO 105 Ruthenium Oxide sensor AC excitation Use only the 1 0V Ree ae constant voltage excitation 2 to 273K SI RO 105 with DC excitation This is the recommended configuration for 32 Re TOs DE MOUA this high resistance sensor 2 to 273K 33 RO 600 AC SI RO 600 Ruthenium Oxide sensor Constant voltage AC excitation The isenix remote command is used to set factory installed sensors For example the command INPUT B ISENIX 33 would set input B to use the RO 600 sensor INPUT A ISENIX 1 would set input A to use the S700 Diode INPUT A ISENIX 0 would turn input A off by setting the sensor to none 96 Scientific Instruments Inc Model 9302 9304 User Installed Sensor Curves The user may install up to four custom sensors This table shows the sensor index and default name of the user curves User Sensor 0 User Sensor 1 User Sensor 2 User Sensor 3 0 N 0 0 iN 0 When using the CALCUR commands only user curves are addressed therefore the user index usenix shown above is used The USENIX remote commands address user installed curves For example CALCUR 2 would address user curve 2 INPUT A USENIX 1 would set input A to use User Sensor 1 97 Scientific Instruments Inc Model 9302 9304 Sensor Curves on CD The following sens
51. ay be either YES or NO Query Syntax RELAYS lt num gt LOENA Query Response lt status gt Where lt num is the relay number and lt status gt is the setting of the low temperature alarm enable for lt channel gt lt status gt will be either YES or NO Command Example RELAY 1 LOENA YES Enables low temperature assertion for relay 1 Query Example RELAY 0 LOEN Example Response NO Query Example REL 0 HIENA LOENA Example Response YES NO Indicates that relay 0 will assert on a high temperature condition but not on a low temperature condition Short Form REL LOEN 86 Scientific Instruments Inc Model 9302 9304 CALCUR commands The CALCUR commands are used to transfer sensor calibration curves between the monitor and the host controller Curves are referenced by an index number In the Model 9302 9304 there are six user curves numbered 1 through 6 The CALCUR data block consists of a header multiple curve entries and a terminator character The header consists of four lines as follows Sensor Name Sensor name string 15 characters max Sensor Type Enumeration See Sensor Types table Multiplier Signed numeric Units Units of calibration curve OHMS VOLTS or LOGOHM Each entry of a curve contains a sensor reading and the corresponding temperature Sensor readings are in units specified by the units of the curve using the CALDATA UNITS command These units may be OHMS VOLTS or LOGOHM Temperature is
52. ay time constant filter and reported in display units Query Syntax INPUT lt channel gt Where lt channel gt is the input channel parameter Query Response lt temp gt Where lt temp gt is the temperature of the specified input channel in display units K F C or S Floating Point string Query Example INPUT B Example Response 123 4567 Alternate Form INPUT lt channel gt TEMP Short Form INP INPUT TEMPER Input Temperature The INPUT TEMPER query is identical to the input query described above It reports the current temperature reading on any of the input channels Temperature is filtered by the display time constant filter and reported in display units Query Syntax INPUT lt channel gt TEMPER Where lt channel gt is the input channel parameter Query Response lt temp gt Where lt temp gt is the temperature of the specified input channel in display units K F C or S Floating Point string Query Example INP B TEMP Example Response 12 45933 Short Form INP lt channel gt TEMP 73 Scientific Instruments Inc Model 9302 9304 INPUT UNITS Input channel units Sets or reports the display units of temperature used by the specified input channel Command Syntax INPUT lt channel gt UNITS lt units gt Where lt channel gt is the input channel parameter and lt units gt is the display units indicator lt units gt may be K for Kelvin C for Celsius F for Fahrenheit or S for
53. ayed This is a good way to establish a connection Intermittent lockup on RS 232 interface Possible causes Long cables Try using a lower baud rate In some cases inserting a 50mS delay between commands will help Noise pickup Try using shielded cables with the shield connected to a metal backshell at both ends Don t send reset RST commands to the monitor before reading Symptom Condition Can t talk to the LAN interface Possible causes A Category 5 crossover patch cable is being used where a Category 5 patch cable should be used or visa versa The TCP settings between the monitor and the PC are incompatible Review the network configuration section PC Client software not configured to use TCP Data Socket 5000 Debugging tip The utility software can be used to talk to the monitor over the LAN Data Socket port using the terminal mode All command and response strings are displayed Since the software provides the proper interface setup it is a good way to establish initial connection 102 Scientific Instruments Inc Model 9302 9304 103 Scientific Instruments Inc Model 9302 9304 Appendix C Enclosure Options Panel Mounting Panel Cutout Shown here is a cut out drawing for panel mounting of the Model 9302 9304 ro Panel Mount Kit The Model 9302 9304 mounts to panel by sliding the enclosure through a panel cut out hole and then installing th
54. current is being carried by the shields and is being coupled into the monitor Use a longer display filter time constant to reduce displayed noise DC offset in temperature measurements No temperature reading Possible causes The wrong sensor type or sensor calibration curve is being used Refer to the Input Channel Setup Menu section A four wire measurement is not being used Some cryostats use a to a two wire measurement internally This can cause offset errors due to lead resistance Review the Error Displays section above 101 Scientific Instruments Inc Model 9302 9304 Remote I O problems Symptom Condition Can t talk to RS 232 interface Possible causes Ensure that the baud rate of the monitor matches that of the host computer Ensure that the host computer settings are 8 bits No parity one stop bit The RS 232 port does not have an effective hardware handshake method Therefore terminator characters must be used on all strings sent to the monitor Review the RS 232 Configuration section Ensure that you are using a Null Modem type cable There are many variations of RS 232 cables and only the Null Modem cable will work with Model 9302 9304 monitors This cable is detailed in the RS 232 Connections section Debugging tip The utility software can be used to talk to the monitor over the RS 232 port using the terminal mode All command and response strings are displ
55. ding device operations have finished RST Reset the monitor SYSTEM commands SYSTEM DATE SYSTEM DATE Set or query the instrument s real time clock date value SYSTEM TIME SYSTEM TIME Set or query the instrument s real time clock time value SYSTEM DRES SYSTEM DRES Sets or queries the monitor s display resolution Choices are Full 1 2 or 3 SYSTEM HWREV Queries the instrument s hardware revision level SYSTEM FWREV Queries the instrument s firmware revision level SYSTEM RESEED Reseeds the display filter for all of the input channels resulting in faster settling SYSTEM DISTC SYSTEM DISTC Set or query the display filter time constant Available time constants are 0 5 1 2 4 8 or 16 Seconds 93 Scientific Instruments Inc Model 9302 9304 Command Function Input Channel Commands INPUT Query the current temperature reading on any of the INPUT TEMPER input channels INPUT UNITS Sets or reports the display units of temperature used INPUT UNITS by the specified input channel INPUT SENIX Sets or queries the sensor index number assigned to INPUT SENIX an input channel INPUT VBIAS Set or query the sensor voltage excitation used in the INPUT VBIAS constant voltage mode Applies to constant voltage mode sensors only INPUT ALARM Queries the alarm status of the specified input channel INPUT ALARM HIGHEST INPU
56. e excitation 10 current excitation 10 fault 30 index 75 76 77 ISENIX 75 multiplier 91 name 89 NTC resistor 11 Scientific Instruments Inc Model 9302 9304 power dissipation 10 NTC resistor 13 selection 32 PT100 96 self heating 10 11 PT10K 96 SENIX 77 PT1K 96 type 32 74 90 Rhodium lron 7 96 units 13 30 32 40 73 74 94 RO 105 96 USENIX 76 RO 600 96 Wiring 23 RTD 7 96 Sensor Curve File Ruthenium Oxide 7 96 340 format 43 Ruthenium Oxide 13 CRV format 43 700 5 16 96 SENTYPE commands 89 SI 410 96 Silicon Diode 12 Silicon Diode 5 7 16 96 Standard Event Register 68 Thermistors 7 13 Standard Event Status Enable 93 The Home Status Display 27 STB 67 68 69 Thermal EMPF s 23 Strip Chart 49 thermocouple effects 16 Supported Sensors 7 Time Date 36 Technical Assistance 4 VFD display 27 Temperatue Units Selection 32 web browser 39 63 64 92 Temperature Sensors Web Server Carbon Glass 7 Inputs Page 40 Cernox 7 12 13 15 98 Network Configuration 38 DT 470 96 outputs page 41 DT 670 96 Status Page 37 GaAlAs Diode 7 System Page 41 Germanium 7 13 Index 3
57. e is optional and is used as a convenience to identify a specific instrument The factory default is SI9304 the last four digits of the unit s serial number The IP address and subnet mask default to 192 168 0 4 and 255 255 255 0 These should be changed so that the unit is on the same IP segment as the user s network This means that the first three fields of the IP should match the user s network and the last field should be unique to the unit Configuring E mail E mail is configured from this page First a SMTP mail server address must be entered For example smtp mymailhost com Next is a from and a to E mail address Note that the from address must be valid on the specified mail server The Mail Port is usually port 25 Finally select the channels that you want to receive E mail for Mail will be sent whenever an enabled channel asserts an alarm condition Alarm conditions are setup on the Input Channel Configuration page x NOTE If you are connecting the Model 9302 9304 to a Local Area Network with a gateway to the Internet there must be an e mail server program running on the gateway computer Unlike sending e mail from a computer the Model 9302 9304 is an Internet Appliance that requires a local e mail server to forward e mail E mail server programs are commonly available Check with your systems administrator for details 39 Scientific Instruments Inc Model 9302 9304
58. e panel mount kit SII part number 305 240 Drawings and assembly of the panel mount kit are shown here ile 104 Scientific Instruments Inc Model 9302 9304 Instrument Stand The Instrument Stand accessory SII part number 300 011 is used to mount the Model 9302 9304 on a bench top It tilts the instrument up by 15 for an improved viewing angle 105 Scientific Instruments Inc Model 9302 9304 INDEX 10BaseT 21 AC Power connection 19 cord 5 Fuse Replacement 20 Line Voltage Selection 20 Protective Ground 19 Accessories 5 Alarm display 27 37 e mail 39 enable 32 40 79 80 high temperature 32 78 hysteresis 33 78 hysteresis 18 LED 29 33 low temperature 32 79 outputs 18 setpoint 32 40 78 79 setting 33 40 status 67 78 94 visual 8 Analog Output 8 18 25 34 connector 5 setup 34 ASCII 18 66 70 CALDATA commands 89 CalGen 16 43 53 calibration curve 88 Calibration Curve file format 87 94 index 88 multiplier 88 name 88 sensor type 88 sensor units 88 common command 70 CRV 46 Curve 340 46 Data Logging 41 43 50 configuration 50 file format 50 interval 50 setup 35 daylight savings 36 Display resolution 35 72 93 TC 35 time constant 35 e mail conditions 39 configuration 39 Enclosure 25 dimensions 25 weight 25 Environmental 25 ESE 68 93 ESR 68 93 Ethernet 18 21 63 gateway 64 HTTP 63 IP 63 64
59. ear panel above the power entry module Voltage selection can be changed in the field by opening up the unit and moving jumper chips 2 a gt N To change the voltage selection please follow the procedure below 1 Disconnect the AC power cord a rL J TI 2 Lay the unit upside down on a flat surface and remove the four screws that hold the rear panel in place 3 Gently slide the circuit board out by about two inches This will expose the voltage selection jumpers shown here Figure 2 Voltage Selection Jumpers 4 Add or remove the chip jumpers required to select the desired voltage Note the chip Line Voltage Remove Install jumpers are easily removed by usingtwo 4oovAG 120VA0 RA220 RA120 RB120 soldering irons If you do not have a chip 220VAC 240VAC RA120 RB120 RA220 substitute a short piece of wire 5 Slide the unit back together and re install the four screws Mark the voltage selection on the rear panel in the space provided Do NOT reconnect the AC power cord until the unit is completely reassembled Fuse Replacement Access to the Model 9302 9304 s fuses and voltage selector switch is made by using a screwdriver to open fuse drawer in the power entry module The fuse drawer cannot be opened while the AC power cord is connected Line Voltage Fuse Example In the fuse drawer there is one active fuse and one 100VAC 120VAC 1 0A slow blow L
60. el 9302 9304 protects the operator and surrounding area from electric shock or burn mechanical hazards excessive temperature and spread of fire from the instrument e Keep Away From Live Circuits Operating personnel must not remove instrument covers There are no internal user serviceable parts or adjustments Refer instrument service to qualified maintenance personnel Do not replace components with power cable connected To avoid injuries always disconnect power and discharge circuits before touching them e Cleaning Do not submerge instrument Clean exterior only with a damp cloth and mild detergent only e Grounding To minimize shock hazard the instrument is equipped with a three conductor AC power cable Plug the power cable into an approved three contact electrical outlet only 25 Scientific Instruments Inc Model 9302 9304 Safety Symbols Direct current power line Equipment protected throughout by double insulation or reinforced insulation equivalent to Class II of IEC536 Alternating current power line Alternating or dirrect current power line Caution High voltages danger of electric shock Background color Yellow Symbol and outline Black Three phase alternating current power line Earth ground terminal Caution or Warning See instrument documentation Background color Yellow Symbol Frame or Chassis terminal and outline Black On AC Power Protective conductor terminal
61. en Calibration curve generator fits any Diode or resistor sensor curve at 1 2 or 3 user specified temperature points Analog Output Type Voltage output 0 to 4 096 Volts Input impedance 6000 Digital Resolution 0 0015 of full scale range Relay Outputs Number Two Fully independent Contact Rating 1 Amps 30VDC Contacts Available Normally Open Rear Panel Connector Detachable terminal block Status Outputs Visual Alarms Independent visual alarms can be configured for each input They are displayed on the front panel display and as an LED indicator Status reported via Remote Interface Input channel alarms Remote Interfaces Remote interfaces are electrically isolated to prevent ground loops RS 232 Serial port is an RS 232 standard null modem Rates are 9600 38 400 and 57 600 Baud Ethernet Industry standard 10 BaseT Electrically isolated Language Remote interface language is IEEE SCPI compliant National Instruments LabVIEW drivers available for all interfaces Scientific Instruments Inc Model 9302 9304 Firmware Internal firmware and all data tables are maintained in FLASH type memory General Ambient Temperature 25 C 5 C for specified accuracy Mechanical 5 75 W x 2 875 H x 8 75 D Weight 3 Lbs Enclosure Aluminum Extrusion Machined Aluminum front and rear panels Power Requirement 100 120 or 200 240 VAC 50 or 60Hz 25 Watts Scientific Instruments Inc Model 9302
62. er serviceable parts jumpers or switches inside the unit Further there are no software ROM chips trim pots batteries or battery backed memories All firmware installation and instrument calibration functions are performed externally via the remote interfaces After about ten seconds the self test will complete and the monitor will begin normal operation x NOTE The Model 9302 9304 attempts to connect with the Ethernet as soon as power is applied If there is a valid Ethernet connection the power up sequence is immediate However if there is no connection the Model 9302 9304 will delay about 10 seconds before showing the power up screen Scientific Instruments Inc Model 9302 9304 Factory Default Setup A monitor with factory default settings will have an operational display like the one shown here The dash or dot characters indicate that there is no sensor connected Channel A 301 455K Note that in some cases there will be an erratic temperature display Channel B 312 523K when no sensor is connected This is not an error condition The Channel C 362 321K high input impedance of the monitor s input preamplifier causes Channel D 394 312K erratic voltage values when unconnected Input Channel factory defaults are Sensor Units Kelvin Sensor Type Pt100 385 DIN standard 100Q Platinum RTD Alarm Enables Off To change these press the Enter key then refer to the Input Channel Setup Men
63. es 30 Reading Out of Range ConNditiON ooooooccccnnnccccnnnocccccnnancccnanancnnnnnn 30 Instrument Setup MenuS ccceceesecceceececeeeeeeeeeaeeeceeeeesensenasaeeeeees 31 The Root MENUS estat ocak riot ls latin betis leiste 31 Input Channel Setup Menu oooocococccccccccnccnonnononccnnnnnnnnnnnonncnncnnnnnnnns 32 The Analog Output MeNU ooconncccccnnonoccnonononcnononnn nono nnno nan r nano nanrcnnnns 34 The Relays Mens oca eh ER SRA ANE AAA EARRA 34 The System Setup Menu scccssctstecseiectecsatencgeetsisiceen OA 35 The Network Configuration Menu ccccceeeeeeeeeeeesneeeeeenteeeeeeeaas 36 The Time Date Setup Menu cecceceeeeceeceeeeeeeeeeetaeeeeeeeeeeeees 36 THE Status Page insti aaa 37 Scientific Instruments Inc Model 9302 9304 The Network Configuration Page eccccceeceeeeeeeeeeeteeeeeeeseeeeeeeeeenaees 38 The Input Channel Configuration Page ccceessceeseeeeeeneeeeeeenaees 40 The Output Channel Configuration Page cccsceeseeeeeeseeeeeeneees 41 System Configuration Pageant aaeeea E AE EAER 41 Utility SOfWare eiin irese E E AEE EEEE ia 43 Installing the Utility Software o nnooonnnnnninnninococnnncocininincornnnnnnanncnnnnn no 43 Connecting to an Instrument eee cette teeter eee e aaa 44 Using the Interactive Terminal cccccceeeeseneeeeeeeneeeeeenceeeeeeneeeeseaas 45 Downloading or Uploading a Sensor Calibration Curve ee 46 Using
64. have equal but opposite voltages and will cancel each other Frequently sensor leads are made from the same material as the cryostat wires Therefore there is no significant thermocouple formed by this connection In a four wire measurement scheme only connections in the voltage sense lines can cause measurement errors So the sense wires should have adjacent contacts in a multi pin connector in order to minimize any temperature difference between them Usually the connection to copper in a cryostat is made at the top of the cryostat After this point Thermal EMFs cannot be generated 23 Scientific Instruments Inc Model 9302 9304 RS 232 Connections The Model 9302 9304 uses a Female DB 9 connector for RS 232 serial communication A Rear view of the connector and it s pin out are shown below Pin Function a oone O 2 RXD Receive data 3 TXD Transmit data _ O O Pa ne 7 ps Ground The cable used to connect the Model 9302 9304 to a computer serial port is a Dual Female Null Modem cable An example is Digikey Inc part number AE1033 ND The wiring diagram for this cable is shown below Note that communication with the Model 9302 9304 only requires connection of pins 2 3 and 5 All other connections are optional Table 15 RS 232 Connection Gs gt Model 34 PC DCD 1 S DCD RX 2 2 RX TX 3 3 TX DTR 4 4 DTR DSR 6 6 DSR RTS 7 7 RTS CTS 8 8 CTS RI Oe RI DB9 DB9 DB9 DB9 Male Female Fe
65. he Capture button on Line 4 The software will wait for the reading to stabilize and then will capture the reading and display it in the edit box on Line 4 When the above procedure is complete you will have established upper and lower target values as well as upper and lower measurements The edit boxes on lines 2 and 4 will contain the measured values At this time you may still change the target values on line 1 and 3 if desired Now you can automatically compute the required gain and offset values by clicking on the Calibrate button in the Calibration Results box This will change the Status field from Current to Calibrated and will update the Offset and Gain values with those calculated At this point to values have been transmitted to the instrument In order to send the offset and gain values to the instrument s calibration memory click the APPLY button You will be required to confirm that you really want to update calibration memory 60 Scientific Instruments Inc Model 9302 9304 Summary of Calibration Types Calibration data must be generated for each input channel by sequencing through the various calibration types on each channel A summary of types is given here Calibration Voltage Output Destrintion Type Range Current P a Voltage measurement for use with S Leb OSAN UA Silicon Diode temperature sensors 10A constant current source used S Diode WA oe with Silicon Diode sensors
66. hms depending on the calibration type Nominal value is 0 0 Positive or negative numbers are accepted It is usually calculated by Offset UT gain UM Automatic Calibration Automatic calibration uses the left hand side of the calibration screen and is a four step process 1 Line 1 requires setting a upper target value on the input channel Depending on the calibration range selected this will be in Volts or Ohms First establish a voltage or resistance on the selected input channel that is near the recommended value Then enter the actual value in the box provided 2 Click the Capture button on Line 2 The software will wait for the reading to stabilize and then will capture the reading and display it in the edit box on Line 2 While waiting for a stable reading the following dialog box will be displayed Capturing Data in Progress Capturing input data from instrument Wait for the process to complete Press the Abort button to terminate the process When the capture is complete dismiss the following dialog SI Utility Software 1 Captured Upper Value Scientific Instruments Inc Model 9302 9304 3 Line 3 requires setting a lower target value on the input channel Depending on the calibration range selected this will be in Volts or Ohms First establish a voltage or resistance on the selected input channel that is near the recommended value Then enter the actual value in the box provided 4 Click t
67. ings etc It is selected from the Root Menu System Functions Menu 1 DisplyTc 2s nn 2 DisplyRS 3 hy e the resolution Selections are 1 2 3 or 3 RS232 9600 by Selects the RS 232 baud rate 4 Data Log Off by Start or stop data logging to an internal buffer 5 Data Log 5 sec Internal data logging interval 6 DataLog Cnt 195 Current log count 7 a Data Log Erase internal data logging buffer Table 23 System Functions Menu Display Time Constant The first line of the System Functions Menu is Display TC Or Display time constant This is an enumeration field that sets the time constant used for all temperature displays Choices are 0 5 1 0 2 0 4 0 8 0 and 16 0 Seconds The time constant selected is applied to all channels and is used to smooth data in noisy environments Display Resolution The Display Resolution line Display RS is used to set the temperature resolution of the front panel display Settings of 1 2 or 3 will fix the number of digits to the right of the decimal point to the specified value A setting of FULL will left justify the display in order to show the maximum resolution possible RS 232 RS232 Rate is an enumeration of the RS 232 baud rate Choices are 9600 19 200 38 400 and 57 600 x NOTE Changing the RS 232 baud rate will result in an instrument reset When reset is complete the selected baud rate will be used Data Logging The ne
68. ion Curve GeneratoOF oooococccccncococococcccncnncnananonoos 16 Thermal EMF and AC Bias ISSUES oooooonnococcccocccicocononcnnnnnncncnnnnos 16 Output Channel Features i receten eeaeee aa a a aa RaRa 18 Alarm Outputs i tanei eee aaaea aes eaa a ae aaa eaaa aaa 18 Analog Outputs orein Eea EE E 18 Relay OUDS ooye E AAE EAE 18 Remote Intertaces t i ieccct tested teste aaea eaea E Aa EAE 18 Rear Panel Connections e coi iati e eaS 19 AC Power COnMmeCton itsetnctecteancaeadtatecectanubieettaacetcessdastechsseneteetatade 19 Ethernet LAN Connector ae nana ncnnnnns 21 DENSOF CONMECUONS A aa e e aea a aa E a 22 RS 232 CONNECTIONS eae aaaea eoa eiaa a ea aaae aa std ates 24 Analog Output and Relay Connections 25 Mechanical Form Factors and Environmental cccccccccccconnconnnnnn 25 DIS Play uti R A AAE RAT 25 ENCIOSUTO vacio EE E EAA E AA E O E T 25 Environmental and Safety Concerns eseeeeeseeereseerreseerereeee 25 The User Interface iii tibia ata 27 A A E A O 27 The Home Status Display ooooooococnnnnocinnnocccnnconononcno nan a 27 Navigating the Menu Tel oococcoonoccccnnnocccccnnoncccnononcncna nana ncnnnnnnncnnnns 28 LED indicators aarne aeea aE eaa a Aid ida 29 Restoring Factory Defaults ooonnnccccnnnncccnnnoccccccnnoncccnnnancccnnnncncnnnn 29 The Input Channel Temperature Displays cceceeeeteeeeeeeees 30 Sensor Fault Condition c ccccceeeeeeeeeeeceeeeeeeeeeeeeeeeaeeeeeeeeeeeenae
69. ion curve will be downloaded to the instrument During the transfer curve data points will be displayed in the window s main pane Upon completion the Download Complete dialog box will appear 3 SI Utility Software dloader Operations Data Logging View Help User Opti 28 000000 27 000000 26 000000 25 000000 24 000000 23 000000 22 000000 21 000000 20 000000 19 000000 18 000000 17 000000 16 000000 15 000000 14 000000 13 000000 12 000000 11 000000 10 000000 9 000000 8 000000 7 000000 6 000000 5 000000 4 000000 3 000000 2 000000 1 000000 Short Cuts Sensor Curve Download PID Table Download Download Upload Message Downloading to User Curve 1 Please wait 0 MORAN 100 SI Utility Software ix Connect Comm Type LAN A Download Complete LAN Connected OK No Device Ver Dismiss this dialog box to complete the download process To upload a calibration curve use the same procedure and select Upload This will transfer a curve from the instrument to the PC 48 Scientific Instruments Inc Model 9302 9304 Using the Real Time Strip Charts The real time strip chart feature of the Utility Software lets the user continuously display any combination of input channels on the computer display This function is initiated by selecting the View command on the Utility Software s main toolbar then selecting the desired channels to monitor A strip chart will be displayed
70. ious level cursor display will indicate function Table 17 Function Key Descriptions 28 Scientific Instruments Inc Model 9302 9304 LED indicators There are three LED indicators on the right hand side of the instrument They indicate the following Alarm Red An enabled alarm condition is asserted Relay 1 Green Relay 1 is energized Relay 2 Green Relay 2 is energized Restoring Factory Defaults Factory default settings may be restored with the following simple procedure 1 Turn AC power OFF 2 Press and hold the Enter key while turning AC power back ON Keep the key pressed until you see the power up display indicating that defaults have been restored 29 Scientific Instruments Inc Model 9302 9304 The Input Channel Temperature Displays An Input Channel Temperature Display consists of the input channel designator a Temperature reading and the temperature units The input channel designator is a superscripted A B C or D An input channel may also have a name that may be set by the user On the Home Status display only the first nine characters are displayed The temperature is a seven character field and is affected by the Display Resolution setting in the system menu This setting will be 1 2 3 or Full Settings of 1 2 or 3 indicate the number of digits to the right of the decimal point to display whereas the Full setting causes the display to be left
71. isuse operation outside of the environmental specifications for the product or improper site preparation or maintenance The design and implementation of any circuit on this product is the sole responsibility of the Buyer SII does not warrant the Buyer s circuitry or malfunctions of this product that result from the Buyer s circuitry In addition SII does not warrant any damage that occurs as a result of the Buyer s circuit or any defects that result from Buyer supplied products Notice The information contained in this document is subject to change without notice SII makes no warranty of any kind with regard to this material including but not limited to the implied warranties of merchantability and fitness for a particular purpose SII shall not be liable for errors contained herein or for incidental or consequential damages in connection with the furnishing performance or use of this material No part of this document may be photocopied reproduced electronically transferred or translated to another language without prior written consent Trademark Acknowledgement All product and company names are trademarks or trade names of their respective companies Safety The Model 9302 9304 does not contain any user serviceable parts Do not open the enclosure Do not install substitute parts or perform any unauthorized modification to the product For service or repair return the product to SII or an authorized service center
72. itation Use only the 1 0V constant voltage excitation SI RO 105 with DC excitation This is the RO 105 DC 10uA recommended configuration for this high resistance sensor SI RO 600 Ruthenium Oxide sensor Constant voltage AC excitation Si410 Pt100 385 RO 600 AC Table 11 Factory Installed Sensors CalGen Calibration Curve Generator The CalGen feature is used to generate new calibration curves for Silicon Diode or Platinum sensors This provides a method for obtaining higher accuracy temperature measurements without expensive sensor calibrations Curves can be generated from any user selected curve and are written to a specified internal user calibration curve area The CalGen function may be performed in the instrument by using the front panel Alternatively the feature is also implemented in the Model 9302 9304 utilities software Thermal EMF and AC Bias Issues DC offsets can build up in cryogenic temperature measurement systems due to Thermocouple effects within the sensor wiring Careful wiring can minimize these effects However in a few systems errors 16 Scientific Instruments Inc Model 9302 9304 induced by thermal EMFs can result in unacceptable measurement inaccuracies These cases will require the use of an AC bias or chopped sensor excitation in order to remove DC offsets Sensor Wiring Diode and Platinum RTD type sensors use a DC measurement scheme Theref
73. ittelfuse 313 002 spare Fuse current is determined by the AC line 220VAC 240VAC 0 5A slow blow Littelfuse 313 001 voltage Table 12 AC Power Line Fuses 20 Scientific Instruments Inc Model 9302 9304 Ethernet LAN Connection The 10BaseT Ethernet network RJ 45 system is used by the Model 9302 9304 for Ethernet network connectivity The 10 Mbps twisted pair Ethernet system operates over two pairs of wires One pair is used for receiving data signals and the other pair is used for transmitting data signals This means that four pins of the eight pin connector are used Transmit Data 8 Transmit Data ETHERNET Name Description _ 1 Figure 3 LAN RJ 45 Pinout 10BaseT Straight Through Patch Cable When connecting the Model 9302 9304 to a hub or switch a standard patch cable is used This will connect the instrument s transmit lines to the hub s receive lines etc 10BaseT Crossover Cable When connecting the Model 9302 9304 directly to the computer the transmit data pins of the computer should be wired to the receive data pins of the Model 9302 9304 and vice versa The 10BaseT crossover cable should be used for this purpose A crossover cable is usually a different color than the straight through patch cable Ethernet LAN Connector LEDs The RJ 45 LAN connector on the rear panel of the Model 9302 9304 has two green LEDs The left most LED indicates that a valid connection has been made
74. l 9302 9304 Front Panel The Home Status display has three user selectable formats as follows 1 A four line format that shows the current temperature on all four input channels plus any alarm conditions Displayed text is 5mm high Note that the channel name displayed is defined by the user The Channel A 323 455K factory default of Channel A etc is shown here Channel B 123 465K 2 A two line format that displays input channels AandBina ChannelC 93 152K large 10mm high format Channel D 63 123K 3 A two line format that displays input channels C and D in a large 10mm high format The display format is selected by pressing the amp or keys until A 1 23 345 K the desired format is displayed The Home Status display can be selected from anywhere in the E 92 146K instrument s menu tree by pressing escape dk key Note that pressing the amp key will abort any data entry operation that is in progress 27 Scientific Instruments Inc Model 9302 9304 Navigating the Menu Tree Setup and configuration functions are performed by working with the monitor s menu tree To access this tree from the Home Display press the Enter key The root menu shown here will be displayed ChA Setup The character in the far right column is the cursor To exit ChB Setup this menu and return to the Home Display press the 4 key ChC Setup To navigate the menu move the cursor up or down by pressing ChD
75. l of the instrument For specifics about the connectors and cables required refer to the section above on Rear Panel Connections Configuration of the remote interfaces is done at the instrument s front panel by using the Remote I O Setup Menu All configuration information shown on this screen is stored in non volatile memory and once setup will not change when power is turned off or a remote interface is reset Ethernet Configuration Supported Protocols HTTP The Hypertext Transfer Protocol is a standard protocol used for transferring information between hosts over TCP IP based networks the most common being the Internet HTTP is often referred to as the World Wide Web protocol because it manipulates interconnected information around the globe The Model 9302 9304 HTTP server manages multiple connections simultaneously HTTP is a client server protocol The client host initiates a transfer by contacting the server host The most common HTTP client is a web browser such as Microsoft Internet Explorer or Netscape Navigator The web browser referred to as the web client issues HTTP requests to access information from the Model 9302 9304 SMTP The Simple Mail Transport Protocol is used to send E mail from the Model 9302 9304 toa selected address TIMEP The Time Protocol allows a client to obtain the date and time from a host TIMEP server If a time server is available on the Local Area Network the Model 9302 9304 will periodically quer
76. libration of a single input channel all calibration types must be calibrated Note the Calibration Results box on the screen The Status field will initially be set to Current and the Gain and Offset values shown will be those read from the instrument x Note If your calibration procedure requires saving historical values you will want to record the Gain and Offset values shown on the initial screen before proceeding with actual calibration 58 Scientific Instruments Inc Model 9302 9304 There are two methods available for calibration 1 Automatic The software will recommend voltages and resistances You can set these values on the input channel and capture the instrument s actual readings Then the software will automatically generate offset and gain values for you 2 Manual You can manually enter Offset and Gain values and send them to the instrument Manual Calibration To manually calibrate a range select the desired range from the range type tabs and enter the desired Gain and Offset values in the boxes given and then click the APPLY button Gain is a unit less gain factor that is scaled to a nominal value of 1 0 It is usually computed by gain UT LT UM LM where UT is the upper target and LT is the lower target UM is the upper measurement and LM is the lower measurement Gain values greater than 1 2 or less than 0 8 are rejected as out of range Offset is in units of Volts or O
77. male Male Figure 5 RS 232 Null Modem Cable 24 Scientific Instruments Inc Model 9302 9304 Analog Output and Relay Connections Rear panel Analog Output and Relay connections are made using the six pin pluggable 3 5mm terminal block provided Pins are defined as shown in the table The six pin terminal block plug is a Weidmuller part number 161018 It is Pin Function available from Digikey Inc 281 1057 ND or directly from Scientific Pa Aout Instruments Inc 231 552 o The Analog Output of the Model 9302 9304 will output zero to 4 096 Volts 3 Relay1no and has a 1000 Ohm output impedance Connections are made using pins a Relay 1 Common 1 and 2 Pin One of this block left hand pin is the positive output and Pin Two is the ground return The shield of the output cable may be connected 5 Relayino to Pin Two 6 Relay2 Common Both relays are dry contact Normally open contacts are available on the terminal block These contacts are open and close when the relay is Table 16 Relay Connector Pinout energized Contact ratings are 1 Ampere at 30 VDC Mechanical Form Factors and Environmental Display The display is a four line by twenty character dot matrix VFD Enclosure The Model 9302 9304 is bench mountable Rack mounting can be done by using an optional rack mount kit Dimensions are 5 75 W x 2 875 H x 8 75 D Weight is 3Lbs Environmental and Safety Concerns Safety The Mod
78. ment range is the simple process of generating an offset and gain value However since there are several input ranges available on each sensor input the process can be time consuming Caution Any calibration procedure will require the adjustment of internal data that can significantly affect the accuracy of the instrument Failure to completely follow the instructions in this chapter may result in degraded instrument performance The utility software used in this procedure will first read all calibration data out of the instrument before any modifications It is good practice to record these values for future reference and backup Calibration Services When the controller is due for calibration contact Scientific Instruments Inc for low cost recalibration The Model 9302 9304 is supported on our automated calibration systems which allow SII to provide this service at competitive prices Calibration Interval The Model 9302 9304 should be calibrated on a regular interval determined by the measurement accuracy requirements of your application A 90 day interval is recommended for the most demanding applications while a 1 year or 2 year interval may be adequate for less demanding applications SII does not recommend extending calibration intervals beyond 2 years Whatever calibration interval you select SII recommends that complete re adjustment should always be performed at the calibration interval This will increase your confidence
79. n nano nn anno nn r anni r rn rar rra nr rra 38 Figure 11 System Configuration Page oonnnocicnnnnocinnnocccnnononcnnnnnnnnn nn crono cnn nr nono rra r nn rra rn nr rra 42 Figure 12 Instrument Calibration Screen oocnncccononinocicnnonacnnnnnnancnnnnnn nn nn rro nn rnnnn rra rn rr 58 iv Scientific Instruments Inc Model 9302 9304 Preparing the Monitor for Use Model Identification The model number is identified on the front and rear panel of the instrument as well as in various instrument displays Model Description Model 9302 110 Cryogenic temperature monitor with two standard multi function sensor input channels set for AC power line voltages from 100 to 120VAC Model 9302 220 Cryogenic temperature monitor with two standard multi function sensor input channels set for AC power line voltages from 200 to 220VAC Model 9304 110 Cryogenic temperature monitor with four standard multi function sensor input channels set for AC power line voltages from 100 to 120VAC Model 9304 220 Cryogenic temperature monitor with four standard multi function sensor input channels set for AC power line voltages from 200 to 220VAC Supplied Items Verify that you have received the following items with your monitor If anything is missing contact Table 1 Model Identification Scientific Instruments Inc directly O ovo oOo O Model 9302 or 9304 Cryogenic Temperature Monitor User
80. n page temperature displays and data logging is configured SI 9304 Output Channels Microsoft Internet Explorer Ea x File Edit View Favorites Tools Help Q sxx v Q x 2 CA ya Search Pg Favorites B Ne E LJ rel 3 Address amp http 192 168 0 4foutput htm Y a Go Google v G Search O gO Grisblocked F Check Autolink gt SI 9304 Cryogenic Temperature indicator Source ChA Y High Setpoint 200 000 Enable No Low Setpoint 100 000 Enable No Update Cancel Source ChB High Setpoint 300 000 Enable No Low Setpoint 50 0000 Enable No Analog Output Source ChA v Enable Yes Y Gain 0 50000 Offset 300 000 Figure 10 Output 41 Scientific Instruments Inc Model 9302 9304 System Configuration Page From the system configuration page temperature displays and data logging is configured 3 S 9304 System Setup Microsoft Internet Explorer BAR Ar Fie Edit View Favorites Tools Help Q sa amp x E ya Search Ig Favorites 2 2 EA LJ rel 3 Address E http 192 168 0 4 Sys htm de SE Google w G search Y ge 15blocked Check Autolink SI 9304 Cryogenic Temperature indicator Resolution 3 Y Time Constant 4 Y Sec Data Logging Logging Enable Off i Interval 5 Current Count 0 Samples Date Time Date 8 23 2006 mm dd yyyy Time 18 25 57 hh mm ss Internet Figure 11
81. nononcccnonannncnnnnnncnnnnno 62 Constant current Source Calibration oooooonnnninnnninnnnnnnacccnnnacccnns 62 Calibration of DC resistors 0 ec eceeeee cence ee eeneee ee eneee eee taeeeeetnaeeeeee 62 Calibration of AC resistors ooooonnnccccnnnnicccnnnoncccnnnoncccnnnonnccnn non cccnnnnn anna 62 Remote OperatiON vtooi tidad 63 Remote Interface Configuration ooooncccnnnniccnnnocccccnnonnncnanannnc canon nnarnnnns 63 Ethernet Configuration oooononccccnnnnccccnnoncccnnnoncncnanoncncnn nana iN aa 63 RS 232 Configuration oceniania iaaio inana NARRAR A aA 65 Introduction to Remote Programming sssesesseseereseerresrerresrerresrerrrs 66 NStrUCtONS 2d an abc eSa EE R ETAETA 66 Headers ici ld ndo 66 Truncation Of KeywordS oococincicococnnococcnonononcnonono nano nnnnn cnn nono nnnrnnno 67 SCPI Status REQIS ONS vocacional din ea ate ete tddi 67 The Instrument Status Register ce ceeeeeeseeeeeeeteeeeeenteeeeeeaas 67 The Instrument Status Enable Register 67 The Standard Event RegisSter oooocnncccocnnncoccconoconcnonanancnncnanoncnnnnos 68 The Standard Event Enable Register ooooccniccoccconicociccnocancnncnnnnns 68 The Status Byte Da ea aE ddr nares 68 The Status Byte Register oooonniococnninocicnnococncononconcno nano nano nano nara 69 Remote Commands desiere iiia dantai soi ecesanendenevateddenatcneveenatis 70 IEEE488 Common COMMANAS cooccccconocccccononcncnanancnnnnnancnn cana ncnnnnnnns 70 SYSTEM
82. nput channel C 4 ChD Setup Setup input channel D 5 Analog Output Setup the Analog Output 6 Relayl Setup Setup input Relay 1 7 Relay2 Setup Setup input Relay 2 8 System Setup E Goto the System Setup Menu 9 Net Config Go to the Network Configuration Menu 10 Time Date Setup E Setup the instrument s time and date Table 19 Model 9302 9304 Root Menu 31 Scientific Instruments Inc Model 9302 9304 Input Channel Setup Menu The Input Channel Setup menus are used to configure the two input channels They are accessed from the root menu The first character on each line of these menus is always the input channel identifier which is a superscripted A B Cor D Scrolling to a line using the d or keys and then pressing the Enter key will cause the cursor to change from a block cursor to the data entry cursor type that corresponds to the type of data that may be entered in this field ChA ChB ChC ChD Setup Menu Input channel units Temperature is displayed in real time on the left and is in the selected units Selections 1 A 77 123 Kh are K C F or S Here S selects sensor units Volts or Ohms Sensor type selection Allows selection of any user or 2 ASen Pt100 385 H el factory installed sensor Bias voltage used in Constant Voltage bias mode If 7 sensor does not support voltage bias N A is shown 3 A Bias Voltage N A H
83. nstruments 18 Scientific Instruments Inc Model 9302 9304 Rear Panel Connections The rear panel of the Model 9302 9304 is shown here 100 120VAC SCIENTIFIC INSTRUMENTS INC 200 240VAC Model 9304 Temperature Indicator 25W Max Made in USA Inputs C D RS 232 z LAN Inputs A B Aout Rly1 Rly2 NOC NOC q EMS a Fuse 3AG 1 0A Figure 1 Model 9302 9304 Rear Panel Layout AC Power Connection The Model 9302 9304 requires single phase AC power of 50 to 60 Hz Voltages are set by the factory to either 110VAC or 220VAC Caution Protective Ground To minimize shock hazard the instrument is equipped with a three conductor AC power cable Plug the power cable into an approved three contact electrical outlet or use a three contact adapter with the grounding wire green firmly connected to an electrical ground safety ground at the power outlet The power jack and mating plug of the power cable meet Underwriters Laboratories UL and International Electrotechnical Commission IEC safety standards Power requirement is 25 Watts User replaceable fuses are incorporated in the Power Entry Module 19 Scientific Instruments Inc Model 9302 9304 AC Line Voltage Selection The Model 9302 9304 is set at the factory for AC line voltages of 100 120VAC or 200 240VAC The selection is marked on the r
84. oefficient and a calibration curve multiplier of 1 0 Short Form CALD MULT 91 Scientific Instruments Inc Model 9302 9304 Network Commands These commands are used to configure the Ethernet interface Once the IP address has been configured it is expected that other network configuration will be performed using a web browser NETWORK IPADDRESS Network IP address Command Syntax NETWORK IPADDRESS lt IP gt Where lt IP gt is the IP address string enclosed in double quotes Query Syntax NETWORK IPADDRESS Query Response lt IP gt Where lt IP gt is the Model 9302 9304 s IP address Command Example NETWORK IPADDRESS 192 168 0 4 Query Example NETWORK IPADDRESS Example Response 192 168 0 100 Short Form NETW IPAD NETWORK MACADDRESS MAC address Query Syntax NETWORK MACADDRESS Query Response lt MAC gt Where lt MAC gt is the Model 9302 9304 s MAC address Query Example NETWORK MACADDRESS Example Response 0f 12 34 56 a2 0b Short Form NETW MAC 92 Scientific Instruments Inc Model 9302 9304 Remote Command Summary Command Function IEEE Common Commands ESE The ESE command sets and queries the Standard Event ESE Status Enable ESE Register bits ESR Returns the Standard Event SEV register IDN Returns Instrument Identification String OPC Set the operation complete bit in the Standard Event SEV status register when all pen
85. of the command or query Each instruction s syntax definition shows the parameters as well as the values they accept Headers There are three types of headers Simple Command Compound Command and Common Command Simple command headers contain a single keyword CONTROL and STOP are examples of single command headers The syntax is lt function gt lt terminator gt When parameters indicated by lt data gt must be included with the simple command header for example INPUT CHA the syntax is lt function gt lt white space gt lt data gt lt terminator gt Compound command headers are a combination of two or more keywords The first keyword selects the subsystem and the last keyword selects the function within that subsystem Sometimes you may need to list more than one subsystem before being allowed to specify the function The keywords within the compound header are separated by colons For example SYSTEM AMBIENT To execute a single function within a subsystem use the following lt subsystem gt lt function gt lt white space gt lt data gt lt terminator gt Command headers control IEEE 488 2 defined functions within the instrument such as clear status etc Their syntax is lt command header gt lt terminator gt No space or separator is allowed between the asterisk and the command header CLS is an example of a common command header To execute more than one function within the same subsystem a semi colon
86. om the main menu This will cause a file selection dialog box to appear as follows Look in Model 9304 e e EJ E CryocalD3 crw E RhFe100 crv El curvelD crw E RO104_DC10u4 crv ll curve11 crv E RO105_DC10uA crv l pr100385 crv E RO600_DC10uA crv Es pt1003902 crw E s700curve cry E rhfe27 crv E 51410 crv File name Files of type Curve Files crv 340 X Cancel From this screen the desired calibration curve is selected Cryo con calibration curves have the file extension of CRV Lakeshore curves with the extension 340 may also be selected Scientific Instruments txt files may be downloaded by first selecting a file type of and then selecting the desired calibration curve file After selecting the file and clicking on Open the selected file will be read and the Edit Curve Header dialog box will appear This box contains information extracted from the curve file header that can be modified if desired before the curve is downloaded Edit Curve Header Sensor Name SI 410 Sensor Type Diode Multiplier 1 Unit Volts Number of Pts Abort Display Curve ja Sensor Name is any 15 character string and is only used to identify the sensor Sensor type can be selected from a pull down menu or entered directly Note that different models of SII instruments support different types of sensors Therefore it is important to enter a sensor type that is supported by the s
87. on in the bottom of the Short Cuts toolbar The software will connect to the instrument and display the connection status below the button In case of an error please correct the port connection settings and try again From the main menu select Operations gt Unit Cal The program will read the current calibration values from the instrument and display a calibration screen as shown below All calibration operations can be performed by using this screen Instrument Calibration Si Diode Y SiDiode 1mA DC 100uADC 10uA DC 10uA AC 100uA AC 1mAAC T o o Steps Calibration Reults Channel A y Current Step Calibrating CHA Silicon Diode Yolt il hi Apply 1 9 and enter actual volt Status Current Verify Password 2 Capture Gain 0 999961 I 05 Apply 0 54 and enter actual volt Offset 1 9e 005 eed 4 Capture Cancel Figure 12 Instrument Calibration Screen x Note The instrument will require a password before calibration data can be saved The utility software will allow you to enter and change the password The default password is SII On the far right of the screen a drop down box selects the channel to be calibrated Be sure you have selected the correct channel In order to perform a complete calibration you will need to calibrate each channel individually Along the top of the screen there are tabs that show the types of calibration that are supported by the instrument To perform a complete ca
88. on is clicked the software will begin continuous data logging to the specified file While data logging is in progress a dialog box will be displayed that allows the user to stop logging When this Stop button is clicked logging is stopped and the log file is closed 51 Scientific Instruments Inc Model 9302 9304 52 Scientific Instruments Inc Model 9302 9304 CalGen Calibration Curve Generator The CalGen feature is used to generate new calibration curves for Silicon Diode or resistor sensors This provides a method for obtaining higher accuracy temperature measurements without expensive sensor calibrations New Curves can be generated from any user selected sensor calibration curve and are written to a specified file For Diode sensors the user may specify one two or three data points CalGen will generate the new curve based on fitting the input curve to the user specified points Platinum or other resistor calibration curves require one or two data points The generated curve will be a best fit of the input curve to the two specified input points Since CalGen fits a sensor calibration curve to measured data any errors in the instrument s measurement electronics are also effectively cancelled CalGen Initial Setup To start the CalGen process either select CalGen from the shortcut bar or select Operations gt CalGen from the main menu This will initiate the process of generating a new
89. or the selected input channel Command Example INPUT B SENIX 0 This command sets the sensor index for input channel B to zero disabled Query Example INP A SENIX Example Response 02 This indicates that sensor 02 is assigned to input channel A The name and configuration of sensor 02 may be accessed using the SENTYPE commands Short Form INP SEN 77 Scientific Instruments Inc Model 9302 9304 INPUT ALARM Input Channel Alarm Status Queries the alarm status of the specified input channel Status is a two character string where indicates that no alarms are asserted SF indicates a Sensor Fault condition HI indicates a high temperature alarm LO indicates a low temperature alarm There is a 0 25K hysteresis in the assertion of a high or low temperature alarm condition The user selectable display time constant filter is applied to input channel temperature data before alarm conditions are tested Query Syntax INPUT lt channel gt ALARM Query Response lt alarm gt Where lt channel gt is the input channel indicator and lt alarm gt is the alarm status indicators for that channel Query Example INP A ALARM Example Response Which indicates that no alarm is asserted for input channel A Short Form INP lt channel gt ALAR INPUT ALARM HIGHEST Alarm High Set Point Sets or queries the temperature setting of the high temperature alarm for the specified input channel When this temperatu
90. ore the only effective method of minimizing thermocouple DC offsets is to wire temperature sensors so that connections between dissimilar metals are grouped together For example the connection between sensor leads and cryostat wiring should be kept close together This way the Thermocouple junctions formed by the connection will have equal but opposite voltages and will cancel each other Frequently sensor leads are made from the same material as the cryostat wires Therefore there is no significant thermocouple formed by this connection In a four wire measurement scheme only connections in the voltage sense lines can cause measurement errors So the sense wires should have adjacent contacts in a multi pin connector in order to minimize any temperature difference between them Usually the connection to copper in a cryostat is made at the top of the cryostat After this point Thermal EMFs cannot be generated AC Excitation When a sensor type of ACR or AC Resistance is selected the Model 9302 9304 uses a 1 25Hz square wave sensor excitation This eliminates DC offsets by computing the sensor resistance at two different excitation points This method will not work diode sensors 17 Scientific Instruments Inc Model 9302 9304 Output Channel Features Alarm Outputs Alarm outputs include a LED indicator and an on screen display Alarms may be asserted based on high or low temperature conditions There is a 0 25
91. orrectly set you can go to the DOS Prompt and ping 192 168 0 4 If you receive responses back you can go to the Web browser and type in htip 192 168 0 4 and it will take you to the Model 9302 9304 s Home Page From the Model 9302 9304 s web page you can completely configure the instrument to meet your network requirements 63 Scientific Instruments Inc Model 9302 9304 Web site configuration The Model 9302 9304 factory default settings are as follows IP address 192 168 0 4 Subnet Mask 255 255 255 0 Gateway 192 168 0 1 TCP Data Socket 5000 These settings are also entered into the Model 9302 9304 when the LAN Reset sequence is executed from the front panel The Model 9302 9304 does not support DHCP since dynamic addressing could possibly relocate the unit on the LAN with each power up LAN configuration is performed by the Network Configuration web page described in the Network Configuration section above To display this page in your web browser you must first connect to the Model 9302 9304 When the above factory defaults are set the Model 9302 9304 can be connected to a PC on the same LAN segment by using the LAN connector on the rear panel If you are connecting to a LAN switch or hub use a standard Category 5 patch cable with standard RJ 45 connectors If you wish to connect directly to a PC use a Category 5 Crossover type patch cable The PC may need to be configured to be on the same LAN segment as
92. ors Gallium Arsenide Diodes or 6 Volt Diodes can be used down to a minimum temperature of about 25K This limitation is imposed by the fact that the controller s maximum input voltage is 2 25 Volts Gallium Arsenide sensors do not fit standard calibration curves therefore the user must provide a sensor specific curve before using this type sensor To use diodes Gallium Arsenide select the Diode input sensor type PTC Resistor Sensor Devices RTDs The Model 9302 9304 supports all types of Positive Temperature Coefficient PTC resistive sensors Various combinations of excitation current and full scale input voltage allow the user to trade off accuracy vs sensor self heating The Supported Sensors table above gives a complete list of combinations that can be selected 12 Scientific Instruments Inc Model 9302 9304 Standard calibration curves are provided for DIN43760 and IEC751 Platinum sensors While these curves are based on a 1000 sensor they may easily be extended to other resistance values by using the Multiplier field of the sensor setup A table of recommended setups for various types of PTC resistor sensors is shown here Sensor Sensor Calibration Platinum 1000 R625R1MA 1 0mA AC DC Platinum 10000 R6K100UA 100uA AC DC Platinum 10KQ lt 425K R16K10UA 104A AC DC Rhodium Iron R312R1MA 1 0mA AC DC Table 7 PTC Resistor Sensor Configuration NTC Resistor Sensor Devices The Model 9302 930
93. ors are available on the CD supplied File Description Cryocon S700 Cryo con S700 series Silicon Diode Range 1 4 to 500K 10uA constant current excitation CryocalD3 crv Cryocal D3 Silicon Diode Range 1 5 to 300K SI410 crv Scientific Instruments Inc SI 410 Silicon Diode Range 1 5 to 450K Curve10 crv Lakeshore Curve 10 Silicon Diode curve for DT 470 series diodes Range 1 4 to 495K Curve1 1 crv Lakeshore Curve 10 Silicon Diode curve for DT 670 series diodes Range 1 4 to 500K aufe0O7cr crv PT100385 crv Cryocon CP 100 DIN43760 or IEC751 standard Platinum RTD 100Q at 0 C Range 23 to 1020K PT1K385 crv DIN43760 or IEC751 standard Platinum RTD 1000Q at 0 C Range 23 to 1020K PT1003902 crv Platinum RTD 100Q at 0 C Temperature coefficient 0 003902 Q C Range 73K to 833K PT1K375 crv Platinum RTD 1000Q at 0 C Temperature coefficient 0 00375 Q C Range 73K to 833K Chromel AuFe 7 Thermocouple Range 3 to 610K TCTypeE crv TCTypeK crv Thermocouple Type E Range 3 2 to 1273K Thermocouple Type K Range 3 2 to 1643K TCTypeT crv Thermocouple Type T Range 3 2 to 673K CX1030E1 crv Cernox CX1030 example curve Range 4 to 325K 98 Scientific Instruments Inc Model 9302 9304 99 Scientific Instruments Inc Model 9302 9304 Appendix B Troubleshooting Guide Error Displays Display Condition
94. pecific product If the instrument receives a sensor type that it does not support the Diode type is selected The section titled Supported Sensor Configurations gives complete information on sensor types The Multiplier field is used to select the sign of the sensor s temperature coefficient A value of 1 selects a Negative Temperature Coefficient sensor while a value of 1 selects a Positive Temperature Coefficient The Unit field selects the units used in the calibration curve Choices are Volts Ohms or LogOhm 46 Scientific Instruments Inc Model 9302 9304 Checking the Save as crv will save the curve to disk as a Cryo con crv file The sensor curve may be viewed as a graph by clicking the Display Curve button An example plot is shown here 460 000 0 204 347 716 1 789 20 0 260 Temperature iK After completing any desired changes in the Edit Curve Header dialog box click Accept to proceed Then the curve number dialog box will appear A user calibration curve should be entered here For the Model 9302 9304 user curves are 1 through 4 Please check user manual for the number of user curves for the target model The user curves are after the factory curves in Sensor Setup Enter user curve number fi coe 47 Scientific Instruments Inc Model 9302 9304 When OK is selected the sensor calibrat
95. quire the user to stabalize the input temperature at three user selected points It will capture data at each of these points and then generate a new curve from that data When a 3 point CalGen is started for a Silicon Diode sensor the reference curve must first be selected This is the curve that will be rotated and shifted to fit the selected points 53 Scientific Instruments Inc Model 9302 9304 Look in Model 9304 e Be CryocalD3 crv RhFe100 crv curvelO crv RO104_DC10u4 crv Curvell crw RO105_DC10u4 crv E PT100385 crv E RO600_DC10uA crv pt1003902 crw s70Dcurve crw rhfe27 crv 51410 crv File name Files of type Curve Files crv al Cancel 54 Scientific Instruments Inc Model 9302 9304 When the curve has been selected the following dialog box will appear Enter three reference points Enter a reference point clase to 4 2K Temperature fo Voltage 0 Enter a reference point close to 77K Temperature 0 Voltage 0 Enter a reference point close to 300K Temperature 0 Voltage fo Cancel Vapor Pressure The process requires you to completely fill out this dialog box by selecting a temperature and then copying the voltage or resistance reading corresponding to that temperature from the instrument Note that the Vapor Pressure button will take the user to a convenient calculator that will compute the temperature of various cryogens from the current ba
96. r is autoranged in order to maintain a constant RMS voltage level across the sensor A constant voltage excitation is necessary since the resistance thermometers used below about 10K exhibit a negative temperature coefficient Therefore a constant voltage measurement will reduce the power dissipation in the sensor as temperature decreases By maintaining a low power levels sensor self heating errors that occur at very low temperatures are minimized In the constant voltage mode sensor excitation is a 1 25Hz bipolar square wave This provides DC offset cancellation without loss of signal energy Bias Resistance Resistance 3 33mV 100KQ Excitation current sources used with constant voltage bias are 20KQ calibrated from 1 0mA to 0 1uA so that the accuracy of resistance measurement will be 0 1 Accuracy will steadily Table 4 Voltage Bias Selections degrade at lower excitation currents down to the minimum available output current of 10nA where the accuracy of resistance measurement is about 0 7 Available voltage selections are 1 0V 10 0mV 3 33mV and 1 0mV RMS The maximum and minimum sensor resistance that can be read is a function of the selected voltage bias Power dissipation in the sensor is computed by V P bias sensor 10 Scientific Instruments Inc Model 9302 9304 The tradeoff in measurement accuracy vs minimum sensor excitation current is taken for two reasons 1 The sensitivity of NTC resistor
97. rature Range Cernox Constant Voltage AC 0 3 to 420K Ruthenium Oxide Constant Voltage AC 50mK to 273K hermistors Constant Voltage AC 70 to 325K Rhodium Iron 1mA DC 1 4 to 800K Germanium Constant Voltage AC 0 3K to 100K Carbon Glass Constant Voltage AC 1 4K to 325K Silicon Diode 10uA DC 1 4 to 475K Platinum RTD 1mA DC 14 to 1200K GaAlAs Diode 10uA DC 25K to 325K Scientific Instruments Inc Model 9302 9304 Sensor Selection Front Panel or remote interface There are no internal jumpers or switches Sensor Resolution Sensor Dependent See Sensor Performance Data table Sensor Excitation Constant current mode 1mA 100uA or 10pA Constant voltage mode 1 0V 10mV 3 333mV and 1 0mV RMS Excitation Current 1 0mA to 10nA in steps of 5 of power Resistance Measurement type Ratiometric bridge Resistance Range Constant voltage Maximum resistance 1V 1MQ 10mV 1MQ 3 3mV 430KQ 1 0mV 100KQ AC Excitation Frequency Resistor sensors in constant voltage mode 1 25Hz bipolar square wave Sample Rate 10Hz per channel in all measurement modes Measurement Resolution Sensor Dependent See Sensor Performance Data table Digital Resolution 24 bits Measurement Drift lt 15ppm C Measurement Filter 0 5 1 2 4 8 and 16 Seconds Calibration Curves Built in curves for industry standard sensors plus six user curves with up to 200 entries each Interpolation is performed using a Cubic Spline CalG
98. re is exceeded an enabled high temperature alarm condition will be asserted Temperature is assumed to be in the display units of the selected input channel There is a 0 25K hysteresis in the assertion of a high or low temperature alarm condition Command Syntax INPUT lt channel gt ALARM HIGHEST lt temp gt Where lt channel gt is the input channel indicator and lt temp gt is the alarm set point temperature Temperature is a floating point string that may be up to 20 characters Query Syntax INPUT lt channel gt ALARM HIGHEST Query Response lt temp gt Where lt channel gt is the input channel indicator and lt temp gt is the temperature setting of the high temperature alarm for lt channel gt Temperature is reported to the full precision of 32 bit floating point Command Example INP A ALARM HIGH 200 5 Sets the high temperature alarm set point for input channel A to 200 5 Query Example INP A ALARM HIGHEST Example Response 125 4321 If the display units setting for input channel A are Kelvin this response is also in units of Kelvin Short Form INP lt channel gt ALAR HIGH 78 Scientific Instruments Inc Model 9302 9304 INPUT ALARM LOWEST Alarm Low Set Point Sets or queries the temperature setting of the low temperature alarm for the specified input channel When the input channel temperature is below this an enabled low temperature alarm condition will be asserted Temperature is assumed to be
99. rometric pressure Once the dialog box has been completed click OK to proceed To finish the process you will be prompted to save the modified calibration curve to a file 55 Scientific Instruments Inc Model 9302 9304 The Vapor Pressure Calculator The Vapor Pressure Calculator is a convenient aid that computes the actual temperature of most cryogens given the current barometric pressure It can be launched directly off of the utility disk by executing Vapor Pressure Calculator exe or from the CalGen dialog as shown above A typical calculation is shown here apor Pressure Calculator You must select the Substance from a drop down list and then select the barometric pressure and temperature units Substance selections are shown here Vapor Pressure Calculator Carbon Dioxide Nitrogen Heliurn 4 F Ry a 373 1621 56 Scientific Instruments Inc Model 9302 9304 Instrument Calibration Calibration of the Model 9302 9304 requires the use of various voltage and resistance standards in order to generate calibration factors for the many measurement ranges available Calibration is Closed Case There are no internal mechanical adjustments required The Model 9302 9304 cannot be calibrated from the front panel Calibration data is stored in the instrument s non volatile memory and is accessed only via the remote interfaces Calibration of a measure
100. rument s firmware revision level Query Syntax SYSTEM HWREV Query Example SYSTEM HWREV Example Response B Indicating that the instrument s firmware is revision level B Short Form SYST HWR 71 Scientific Instruments Inc Model 9302 9304 SYSTEM DRES Display Resolution Sets or queries the monitor s display resolution Choices are FULL The VFD will display temperature with the maximum possible resolution 1 2 or 3 The VFD display will display the specified number of digits to the right of the decimal point NOTE This command only sets the number of digits displayed on the front panel VFD It does NOT affect the internal accuracy of the instrument or the format of measurements reported on the remote interfaces The main use for this command is to eliminate the flicker in low order digits when the monitor is used in a noisy environment Command Syntax SYSTEM DRES lt res gt Where lt res gt is the display resolution as follows FULL 1 2 3 Command Example SYSTEM DRES 2 Causes the VFD display to show temperature with two digits to the right of the decimal point Query Syntax SYSTEM DRES Query Response lt res gt Where lt res gt is the display resolution Query Example SYSTEM DRES Example Response FULL Short Form SYST DRES SYSTEM DATE System Date Set or query the instrument s date String format is dd mm yyyy Command Syntax SYSTEM DATE lt date gt Where lt date gt is the da
101. s When a complete curve is received it is conditioned sorted and copied to FLASH memory This process can take as long as 250 milliseconds with a long table 87 Scientific Instruments Inc Model 9302 9304 NOTE When using the RS 232 interface a time delay should of about 500mS should be inserted after sending the last line of a calibration table This will allow the flash memory update to complete Other remote interfaces do not require a delay x NOTE Factory installed calibration curves may not be changed or deleted with these commands CALCUR Calibration Curve Set or Query Sets or queries sensor calibration curve data Command Syntax CALCUR lt index gt lt sensor name gt lt sensor type gt lt multiplier gt lt curve units gt lt sensor reading 1 gt lt Temperature 1 gt lt sensor reading 2 gt lt Temperature 2 gt o o lt sensor reading N gt lt Temperature N gt A new line In character must be appended to each line The maximum number of entries in a curve is 200 and the minimum is 2 lt index gt is a numeric index to the user calibration curve list Values are 1 through 6 in the Model 9302 9304 lt curve name gt is a name to be assigned to the calibration curve It is a minimum of 4 and a maximum of 15 ASCII characters lt sensor type gt is from the following list SiDiode R250K10UA R62K10UA R31K10UA R15K10UA R8K10UA R625R1MA R312R1MA R156R1MA or
102. sensor curve Using CalGen With Diode Sensors Options for generating Diode calibration curves are 1 One point near 300K The portion of a Diode Sensor curve above 30K will be fit to a user specified point near 300K This is a two point fit where the 30K point is taken from the existing calibration curve The portion of the curve below 30K is unaffected 2 Two points 300K and 77K Here two user specified points are taken to fit the diode curve region above 30K The entire curve is offset to match the 77K point then the gt 30K region is fit to the two points 3 Three points 300K 77K and 4 2K Two points above 30K are fit as in the selection above Then a third point is used to fit a single point in the high sensitivity region below 20K 4 One point near 4 2K This is a two point fit where the 20K point is taken from the existing calibration curve The portion of the curve above 20K is unaffected Using CalGen With Resistor Sensors The calibration curve generation procedure for Platinum or other resistor sensors is the same as for the diode However these sensor curves are generated using two user specified points Therefore the selection of the number of points is not required Example CalGen Procedure A complete procedure for calibrating a diode sensor at three points is shown here Before the procedure can be started the instrument must be connected and have a valid sensor connected The CalGen procedure will re
103. t num gt Temperature is reported to the full precision of 32 bit floating point Command Example RELAY 0 HIGHEST 25 947 Sets the high temperature set point for relay 0 to 25 947 Query Example RELAY 1 HIGHEST Example Response 125 4321 If the display units setting for the source input channel are Kelvin this response is also in units of Kelvin Short Form REL HIGH 83 Scientific Instruments Inc Model 9302 9304 RELAYS LOWEST Relay Low Set Point Sets or queries the temperature setting of the low temperature set point for a specified relay When the source input channel temperature is below this value an enabled low temperature condition will be asserted Temperature is assumed to be in the display units of the selected source input channel There is a 0 25K hysteresis in the assertion of a high or low temperature alarm condition Command Syntax RELAYS lt num gt LOWEST lt temp gt Where lt num is the relay number and is 0 or 1 lt temp gt is the set point temperature Temperature is a floating point string that may be up to 20 characters Query Syntax RELAYS lt num gt LOWEST Where lt num is the relay number Query Response lt temp gt Where lt temp gt is the low temperature set point Temperature is reported to the full precision of 32 bit floating point Command Example RELAY 1 LOW 100 5 Sets the low temperature set point for relay 1 to 100 5 Query Example RELAY 0 LOW Example Response 25
104. te string in double quotes Command Example SYSTEM DATE 15 8 2003 Sets the Model 9302 9304 s date to August 15 2003 Query Syntax SYSTEM DATE Query Example SYSTEM DATE Example Response 12 9 2004 for September 12 2004 Short Form SYS DAT SYSTEM TIME System Time Set or query the instrument s time String format is hh mm ss Command Syntax SYSTEM TIME lt time gt Where lt time gt is the date string in double quotes Command Example SYSTEM TIME 22 23 00 Sets the Model 9302 9304 s time to 22 23 00 or 10 23PM Query Syntax SYSTEM TIME Query Example SYSTEM TIME Example Response 11 22 04 Short Form SYS TIM 72 Scientific Instruments Inc Model 9302 9304 SYSTEM RESEED Re seed the display filters Re seeds the input channel s averaging filter allowing it to settle significantly faster Command Syntax SYSTEM RESEED Command Example SYSTEM RESEED Short Form SYS RES INPUT commands The INPUT group of commands is associated with the configuration and status of the four input channels INPUT may also be a stand alone query Parameter references to the input channels may be e Numeric ranging in value from zero to two e Channel ID tags including ChA ChB ChC or ChD e Alphabetic including A B C or D INPUT Input Channel Temperature Query The INPUT query reports the current temperature reading on any of the input channels Temperature is filtered by the displ
105. the Real Time Strip Charts cccccceceeeesneeeeeeeneeeeeenieeeeeeeaas 49 Data LOGGING ciencia ataca 50 Remote I O command HELP eececeeeeeteeeeeeeeneeeeeeeneeeeeeneeeeeenieeeeeneaas Error Bookmark not defined CalGen Calibration Curve Generator conooccccnoccccccnconccccnnoncncnnnanccinnnno 53 CalGen Initial Setup ccccccceceeeeeeeeceeceeeeeeeeeeeeaeeeeeeeeeeeetenaees 53 Using CalGen With Diode Sensors 53 Using CalGen With Resistor Sensors oonnccccinnncccnnnocccccnnancccnnnns 53 Example CalGen Procedure ccceceeeeeeeeceeeeeeeeseesesueeeeeeees 53 The Vapor Pressure Calculator ccccccceeceeceeceeeeeeeseeencaeeeeeeeeeeeees 56 Instrument Calibration ccececccccececeeeee aeaa i oaa aaa narr e ea eaaa 57 Calibration Sencesa Sar aria cinder ea A atte ted aaa tiene 57 Calibration Interval errepi did do it 57 Minimum Required Equipment ceccccecceeeceeeeeeeeceeeeeeeeeteeeeenaees 57 The Basic Calibration SEQUENCE oocooooocccccccccccocononccnncnccnnnnncnncnnnnnnnnnnns 58 Manual Calibration enoia araa aa iaa E eaa aeaa 59 Automatic CalibratiON oooooooinnninocccnnnnnnnnnnononcconcnnnnnnnnnn nc cnnnnnnnnnns 59 Summary of Calibration TypeS onnnnccninninicinnnncoccnnnocccnnn arar cnnnnn nn 61 Calibration of Silicon Diodes oooooonnncccnnnnoniccnnnancccnnnancccnnnanncccnnnnncnnnn 62 Diode Voltage Calibration oooonnoncccnonnccccnnnocccc
106. the selected input channel If the index is outside of the range 0 through 3 a value of 1 will be returned Command Example INPUT B USENIX 0 This command sets the sensor index for input channel B to zero disabled Query Example INP A USENIX Example Response 2 This indicates that sensor 02 is assigned to input channel A Short Form INP SEN 76 Scientific Instruments Inc Model 9302 9304 INPUT SENIX Sensor index obsolete Sets or queries the sensor index number assigned to an input channel This command is used to assign the sensor type to a channel Sensor types and configurations are accessed using the SENTYPE commands Sensor index zero indicates that there is no sensor connected to the selected input channel This will disable all readings on the channel Refer to Appendix A for a description of sensors indices etc Note To ensure portability of software written for the Model 32 you should use the ISENIX command to assign a factory installed sensor or USENIX to assign a user sensor This way the index will always correspond to the correct sensor regardless of the Model 32 firmware revision Command Syntax INPUT lt channel gt SENIX lt ix gt Where lt channel gt is the input channel parameter and lt ix gt is the desired sensor index Query Syntax INPUT lt channel gt SENIX Where lt channel gt is the input channel indicator Query Response lt ix gt Where lt ix gt is the sensor index f
107. three user specified points The result is a high accuracy sensor calibration at low cost Upload and download PID tables to a temperature controller These tables can be generated by using a simple text editor and downloaded to the controller Configuration of any of the instrument s remote interfaces Interactive Mode provides interactive communication with the instrument over any of the remote interfaces Instrument calibration using a simple step by step menu driven process Installing the Utility Software From a CD the utility software package does not require installation It can be executed from the CD directly by running the UTILITY EXE program When the software is downloaded off of the Internet it is in a self extracting ZIP format and must first be un zipped onto hard disk 43 Scientific Instruments Inc Model 9302 9304 Connecting to an Instrument The desired remote interface connection may be selected by clicking Comm gt Port Select from the main menu 3 SI Utility Software dloader Operations Data Logging Port Select Dialog Select the port to communicate with controller Click GPIB to change GPIB address RS232 C USB GPIB C LAN Connect Conce a Comm Type AS232 LAN Not Connected No Device Ver Select the desired communications port and then click OK Click on the Connect button of the shortcut menu bar or on Comm gt Connect from the main menu to connect
108. to a hub or computer ita If the LAN is plugged in and the Connected LED is not on there is a problem that must be addressed before you can communicate with the instrument BA Possible problems are ASS 1 Using the wrong type of cable For example using a Crossover Cable T Activity Gonn eted to connect the Model 9302 9304 to a hub instead of a computer See the sections above 2 Connection to the wrong type of hub The hub must be capable of accepting 10 BaseT connections Some older hubs do not support this The right most LED indicates activity on the LAN It should flicker periodically during normal operation 21 Scientific Instruments Inc Model 9302 9304 Sensor Connections All four sensor connections are made at the rear panel of the Model 9302 9304 using the two DB 9 receptacles provided There are two channels on each connector Four Wire Sensor Connections Silicon Diode and all resistor type sensors should be connected to the Model 9302 9304 using the four wire method It is strongly recommended that sensors be connected using shielded twisted pair wire Cable shields should be dressed for connection to the conductive backshell of the connector Signal connection is as follows Figure 4 Input Connector Lower Sense 2 upper cuen 8 Ueper Gurrente o Upper Sensor 4 Upper sense 5 Upper Current 6 Soper Currency 7 upper Sensor 1 T Uoper sense
109. to the instrument After a short delay the connect LED should light and the instrument type will be displayed Also most of the grayed out fields on the menu bars should activate 44 Scientific Instruments Inc Model 9302 9304 Using the Interactive Terminal The Utility Software s Interactive Terminal mode allows the user to send commands to the instrument and view the response Terminal mode is selected by selecting Comm gt Interact from the main menu or Interact from the shortcut bar This will result in the display shown below To interact with the instrument type a remote command into the dialog box and click Send The command will be transmitted to the instrument and a response if any will be displayed on the background window To exit terminal mode click the Quit button on the dialog box a Si Utility Software dloader Iperations Data Logging MM Serial Terminal Enter Command Send DN Interact CalGen Quit Data Logging Upload Data Log Connect Comm Type LAN LAN Connected No Device Wer 45 Scientific Instruments Inc Model 9302 9304 Downloading or Uploading a Sensor Calibration Curve Sensor calibration curves may be transferred between the PC and the instrument by using the Calibration Table menu To download a curve send it from the PC to the instrument either select Sensor Curve Download from the shortcut bar or Operations gt Sensor Curve gt Download fr
110. tor any combination of the following characters must be sent to terminate the line 1 Carriage Return Hex OxD 2 Line Feed in Hex OxA 3 Null 0 The monitor will always return the carriage return linefeed r n character sequence at the end of each line 65 Scientific Instruments Inc Model 9302 9304 Introduction to Remote Programming Instructions Instructions both commands and queries normally appear as a string embedded in a statement of your host language such as BASIC or C Instructions are composed of two main parts The header which specifies the command or query to be sent and the parameters which provide additional data needed to clarify the meaning of the instruction An instruction header is comprised of one or more keywords separated by colons Queries are indicated by adding a question mark to the end of the header Many instructions can be used as either commands or queries depending on whether or not you have included the question mark The command and query forms of an instruction usually have different parameters Many queries do not use any parameters The white space is used to separate the instruction header from the instruction parameters If the instruction does not use any parameters you do not need to include any white space White space is defined as one or more spaces ASCII defines a space to be character 32 in decimal Instruction parameters are used to clarify the meaning
111. tput The first line of the Analog Output Menu selects the source input channel The analog output voltage will be scaled to the selected channel Next is the enable If the analog output is not enabled it will output a constant zero Volts The Offset and Gain values are used to scale the output to be within it s zero to 10 Volt range The formula is Output Temperature Offset x Gain Where Temperature is the current reading of the selected input channel The Relays Menu There are two dry contact relays available in the Model 9302 9304 They can be independently programmed by using this screen The relay number 1 or 2 is superscripted in the first column Relay 1 Relay 2 Setup Menu 1 i High 200 000 ch ie for the High Temperature 2 1High Enable A 3 1 Low 200 000 el for the Low Temperature 4 i Low Enable Low temperature relay enable Yesh Selections are Yes or No Table 22 Relay Setup Menu Setting up a Relay The various conditions that can cause a relay to assert may be enabled or disabled by using the Enable fields provided High and Low temperature set points are entered as floating point numeric values There is a 0 25K hysteresis between the asserted and de asserted states 34 Scientific Instruments Inc Model 9302 9304 The System Setup Menu The System Functions Menu is used to set many of the instrument s parameters including display resolution I O port sett
112. u section Instrument setup factory defaults are Display Filter Time Constant 4 0 Seconds Display Resolution 3 digits RS 232 Baud Rate 9600 Data Logging Off To change these press the Enter key and then select the System Setup Menu Analog Output Control Channel ChA Enable No Offset 300 Gain 0 5 To change these press the key and then select Analog Output Relay settings Relay 1 Relay 2 Off To change these press the key and then select Relays Network settings are IP Address 192 168 0 4 Subnet Address 255 255 255 0 x NOTE Factory defaults may be restored at any time by use of the following sequence 1 Turn power to the Model 9302 9304 OFF 2 Press and hold the Enter key while turning power back ON Scientific Instruments Inc Model 9302 9304 Technical Assistance Trouble shooting guides and user s manuals are available on our web page at http www scientificinstruments com Technical assistance may be also be obtained by contacting SII as follows Scientific Instruments Inc 4400 West Tiffany Drive West Palm Beach FL 33407 Telephone 561 881 8500 FAX 561 881 8556 e mail sales scientificinstrtuments com For updates to LabVIEW drivers utility software and product documentation go to our web site and select the Download area Current Firmware Revision Level As of January 9 2006 the current firmware revision level for the Model 93
113. xt four fields are used to configure internal data logging Logging is turned off or on by using the Data Log field This will start or stop recording all input channel data to an internal non volatile memory The data logging interval in seconds is set by the next field The Data Log Cnt field is display only and shows how many samples there are in the log buffer The Erase Data in Log field is selected to erase the internal log memory Press Enter to begin the erasure sequence The unit will then request confirmation Data accumulated into the log may be read out by using the utility software or by use of remote commands 35 Scientific Instruments Inc Model 9302 9304 The Network Configuration Menu The Network Configuration Menu is accessed from the System Setup Menu It is used to configure basic Ethernet LAN settings For advanced network settings use a web browser to view the embedded web server Press Enter to change the unit s Ethernet IP 1 IP 192 168 0 4 a 9 address Press Enter to reset all Ethernet LAN settings 2 Reset Net Config a back to their original factory defaults s The Time Date Setup Menu The Time Date Setup Menu is used to set the system s time and date settings 1 Time 11 04 03 a Enter time in 24 hour format 2 Date 7 1 05 Enter Date Enable automatic daylight savings 3 Daylight No M compensation
114. y Response lt status gt Where lt channel gt is the input channel indicator and lt status gt is the setting of the high temperature alarm enable for lt channel gt lt status gt will be either YES or NO Command Example INPUT A ALARM HIENA NO Disables the high temperature alarm for input channel A Query Example INP B ALARM HIEN Example Response YES Query Command Example INP B ALARM HIGH HIEN NO Example Response 154 2323 The high temperature alarm set point for channel B is reported Then the high temperature alarm for channel B is disabled Short Form INP lt channel gt ALAR HIEN 79 Scientific Instruments Inc Model 9302 9304 INPUT ALARM LOENA Alarm Low Enable Sets or queries the low temperature alarm enable for the specified input channel An alarm must be enabled before it can be asserted Command Syntax INPUT lt channel gt ALARM LOENA lt status gt Where lt channel gt is the input channel indicator and lt status gt is the status of the low temperature alarm enable lt status gt may be either YES or NO Query Syntax INPUT lt channel gt ALARM LOENA Where lt channel gt is the input channel indicator Query Response lt status gt Where lt status gt is the setting of the low temperature alarm enable for lt channel gt lt status gt will be either YES or NO Command Example INPUT A ALARM LOENA YES Enables the low temperature alarm for input channel A Query Example INP
115. y it to update it s internal clock TCP IP The Transmission Control Protocol Internet Protocol provides reliable flow controlled end to end communication between two machines TCP operates even if datagrams are delayed duplicated lost delivered out of order or delivered with corrupted or truncated data TCP IP uses port numbers to identify the many application protocols that can run over it In the Model 9302 9304 a TCP IP port is available for communication using an ASCII command language This is how the instrument interfaces to data acquisition software including LabView Ethernet IP Configuration Each device on an Ethernet Local Area Network must have a unique IP Address This is similar to IEEE 488 systems where each device required a unique GPIB address Further the address assigned to the Model 9302 9304 must be within the range of the computers you want it to communicate with The range is determined by the Subnet Mask The Model 9302 9304 is shipped with a default IP address of 192 168 0 4 and Subnet Mask of 255 255 255 0 You can configure the Model 9302 9304 to use any IP address from the front panel by going to the Network Configuration Menu Alternatively You can configure your PC s Network connection with an IP address that is in the same range as the Model 9302 9304 IP address 192 168 0 x and connect to the instrument using a crossover cable between your PC and the Model 9302 9304 Once the IP is c

User`s Guide Model 9302/9304 Cryogenic Temperature Monitor

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