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Model 14 User's Manual

1. Carbon Glass Constant Voltage AC 1 4K to 325K Silicon Diode 10uA DC 1 4 to 475K latinum RTD 1mA DC 14 to 1200K GaAlAs Diode 10uA DC 25K to 325K Cryo con Model 12 14 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 10uA 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 CalGen 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 6002 Digital Resolution 0 0015 of full scale range Re
2. Temperature is a floating point string that may be up to 20 characters Query Syntax RELAYS lt num gt HIGHEST Where lt num gt is the relay number Query Response lt temp gt Where lt temp gt is the value of the set point for relay lt 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 O 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 Cryo con Model 12 14 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 gt 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 gt is the relay number Query Response lt temp gt Where lt temp gt is the low temperature se
3. Short Form CALD TYP 90 Cryo con Model 12 14 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 10000 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 coefficient and
4. 12 14 uses current sources to cover the 1 0mA to 10nA in steps of 5 power Voltage Bias 0 1 Resistance Measurement Accuracy 10 0mV 100 100KQ 1 0MQ 3 33mV 3 30 43KO 430KQ 1 0mV 10 10KQ 100KQ Table 5 NTC Resistor Measurement Accuracy 11 Cryo con Model 12 14 Supported Sensor Types A complete list of the sensor types supported by the Model 12 14 is shown below Sensor Max Bias Excitation Voltage Type Typical Use Type Current Resistance Diode Silicon Diode GaAs Diode 1 OmAt NTC resistors including ACR 1Qto IMQ CV i Ruthenium Oxide 10nA CernoxT R16K10UA 16K0 Cl 104A PTC NTC Resistors R8K10UA PTC NTC Resistors R2K100UA 100uA Platinum 1000 R625R1MA cl 1 0mA Pt 100 gt 800K Table 6 Supported Sensors Cl Cl Bias types are CI 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 Sensors 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 fi
5. E Cryo Con Model 14 Temperature Monitor Microsoft Internet Explorer File Edit wiew Favorites Tools Help Back amp fat search Favorites Media Er 3 El Address el http 192 169 0 4 inputchans htm E Cryo con Model 14 Cryogenic Temperature Monitor Input Channel A Hamne ChannelA Units k sensor Puas y 385 High Alarm 100 000 Enable No Low Alarm 10 0000 Enable No Cancel Input Channel B Hame channelB Units Kl Sensor Puo y 285 High Alarm 200 000 Enable No Low Alarm 20 0000 Enable No Update Cancel Input Channel Name Channel C Units K Sensor Pt 00 385 x High Alarm 300 000 Enable No Low Alarm 30 0000 Enable No Update Cancel Input Channel D Name Channel DI Units K Sensor Pe oo 385 High Alarm 400 000 Enable No Low Alarm 40 0000 Enable No Update Cancel ry TT a Internet Figure 9 Input Channel Setup Web Page 40 Cryo con Model 12 14 The Output Channel Configuration Page Output channels on the Model 12 14 include two dry contact relays and an analog output These may be completely configured using this web page Cryo Con Model 14 Temperature Monitor Microsoft Internet Explorer File Edit View Favorites Tools Help da Back mb 3 fai search Favorites Media 4 Gr amp DI Address E http 192 168 0 4 outputchans htm Cryo con Model 14 Cryogenic
6. Ethernet LAN Connection 21 Sensor Connections i 22 RS 232 Connections sli eee NA A 24 Analog Output and Relay Connections 25 Mechanical Form Factors and Environmental o 25 DEN hace abessocnsce ic cane upton besa nenacapicnsa mec arseconanetatenate oguiamaneoecienc aeons 25 ENE 25 Environmental and Safety Concerns 25 The USE hette ua 27 NEA UN 27 The Home Status Display 27 Navigating the Menu Tree iii 28 LED INdIGalo sarai ora 29 Restoring Factory Defaults ooccccoooconccccnncocoononccconnnccnannnnnnos 29 The Input Channel Temperature Displays 30 Sensor Fault Condition siae 30 Reading Out of Range Condition 30 Instrument Setup MENUS i 31 The Root A A tee 31 Input Channel Setup Menu i 32 The Analog Output Menu rrrnrnnnnrnnnnnnrnnrnnnvnrnnnnrnnnnnnsnnnnnnnrnnannsnn 34 The Relays MEN anda ef add ner 34 The System Setup Menu 35 The Network Configuration Menu rrrnnnnnnenrnnnnrnnnnnnrenrnnnnennnsnsnn 36 The Time Date Setup MENU i 36 The Status adan Se 37 Cryo con Model 12 14 The Network Configuration page 38 The Input Channel Configuration Page 40 The Output Channel Configuration Page ccccccoccnncconcn
7. 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 Tne Sensor Sensor Tc Calibration yP Type Excitation Units Carbon Glass ACR 1 0 to 10 0mV AC LogOhm Germanium ACR 10t010 0mVAC LogOhm ACR 1 0to10 0mVAC LogOhm Ruthenium Oxide ACR 1 0 to 10 0mV AC LogOhm ACR 1 0to 10 0mV AC LogOhm Table 8 NTC Resistor Sensor Configuration 13 Cryo con Model 12 14 Sensor Performance Summary ake y 1000 Platinum 10000 Platinum 10KQ Platinum Sensor Type e Riva DIN43760 DIN43760 DIN43760 Input 2 5V 10uA 6250 1 0mA 31250 100uA 16KQ 10uA Configuration PER SN H dea 300K 2 4mV K 800K 0 36Q K 600K 3 7Q K 300K 390 K Sensor Sensitivity 77K 1 9mV K i oa sida o 77K 420 K 4 2K 30mV K 0 di 30K 19Q K 30K 0 190 K 30K 1 90 K Measurement 80uV 0 00005 Accuracy SenVal Temperature 80uV 0 00005 Measurement SenVal Accuracy SenSen Measurement 800K 5 1mK 600K 4mK Temperature EEE 300K 47mK 300K 4mK eda Resolution EP SENSE Mi 77K 1 1mK 77K 0 5mK 20 sa 30K 2 4mK 30K 1 0mK Peer esse 4 2K 17uW 30K 3 7uW 30K 370nW 30K 37nW p TTK 12uW TIK 20uW TTK 2 0uW TTK 200nW resistance Table 9 Sensor Performance for Diode
8. 1 000Q S700 series Silicon Diode Temperature Sensors Temperature range 1 4 to 375K Table 3 Cryogenic Accessories Cryo con Model 12 14 Cryo con Model 12 14 Specifications Features and Functions Specification Summary User Interface Display Type 20 x 4 character or 140x32 graphics VFD Number of Inputs Displayed Model 12 2 Model 14 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 12 and four on the Model 14 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 Temperature Range Constant Voltage AC 0 3 to 420K Ruthenium Constant Voltage AC 50mkK to 273K Oxide Constant Voltage AC 70 to 325K Rhodium lron 1mA DC 1 4 to 800K Constant Voltage AC 0 3K to 100K Plati
9. Factory Installed Curves The following is a list of factory installed sensors and the corresponding sensor index ISENIX No Sensor Used to turn the selected input channel off Cryocon 8700 Cryo con 5700 series Silicon Diode Range 1 4 to 500K 10uA constant current excitation Lakeshore DT 670 series Silicon Diode Curve 11 Range 1 4 to 500K LS DT 670 10uA constant current excitation Lakeshore DT 470 series Silicon Diode Curve 10 Range 1 4 to 500K LS DT 470 coe 10uA constant current excitation SI 410 Diode Scientific Instruments Inc 410 Diode Curve Range 1 5 to 450K 10uA excitation Pt100 385 DIN43760 standard 1000 Platinum RTD Range 23 to 873K 1mA excitation 10KQ at 0 C Platinum RTD Temperature coefficient 0 00385 Range 23 to Pt10K 385 ees 873K 10uA excitation 23 RhFe 27 1mA Rhodium Iron 270 at 0 C 1mA DC excitation 1 5 to 873K SI RO 105 Ruthenium Oxide sensor AC excitation Use only the 1 0V RO 105 AC ae constant voltage excitation 2 to 273K SI RO 105 with DC excitation This is the recommended configuration for nee AS 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
10. INPUT ALARM HIENA Sets or queries the high temperature alarm enable for INPUT ALARM HIENA the specified input channel INPUT ALARM LOENA Sets or queries the low temperature alarm enable for INPUT ALARM LOENA the specified input channel 94 Cryo con Model 12 14 A ee 3 Sensor Calibration Curve Commands CALCUR Sets or queries sensor calibration curve data CALCUR Command Function Relay Commands RELAYS Relay Status Query RELAYS SOURCE Sets or queries the source input channel for a specified RELAYS SOURCE relay RELAYS HIGHEST Sets or queries the temperature setting of the high RELAYS HIGHEST temperature set point for the specified relay RELAYS LOWEST Sets or queries the temperature setting of the low RELAYS LOWEST temperature set point for a specified relay RELAYS HIENA Sets or queries the high temperature enable for the RELAYS HIENA specified relay RELAYS LOENA Sets or queries the low temperature enable for the RELAYS LOENA specified relay Sensor Setup Commands CALDATA Sets or queries the name 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 Please refer to Appendix A SENTYPE NAME Table 24 Remote Comm
11. 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 Cryo con Model 12 14 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 l O errors occur Bits in the ESR are defined as follows ESR Bir mme ets pie em Gia bin Bio Where Bit7 OPC Indicates Operation Complete Bit5 QE Indicates a Query Error This bit is set when a syntax error has occurred on a remote query lt 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
12. It will capture data at each of these points and then generate a new curve from that data 53 Cryo con Model 12 14 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 AA a Files of type Curve Files crv Cancel 54 Cryo con Model 12 14 When the curve has been selected the following dialog box will appear Enter three reference points x Enter a reference point close to 4 2K Temperature i Voltage i Enter a reference point close to FE Temperature 0 voltage Enter a reference point close to 300K Temperature fo 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 barometric 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 Once complete the file can be transferred to any Cryo con instrument 55 Cryo con Model 12 14 The Vapor Pressure Calculator The Vapor Pressure Calculator is a conv
13. 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 Cryo con Model 12 14 Cryo con Utility Software Cryo con provides a PC compatible utility software package with all instruments This is available on CD or on the Internet Utility software can be used to control and configure any Cryo con 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 9 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 Cryo con s CalGen function is implemented This function allows the user to fit an existing sensor calibration curve to one two or three user specified points The result is a high accuracy sensor calibration at low cost Upload and download PID tables to a Cryo con temperature controll
14. 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 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
15. a calibration curve multiplier of 1 0 Short Form CALD MULT 91 Cryo con Model 12 14 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 12 14 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 12 14 s MAC address Query Example NETWORK MACADDRESS Example Response 0f 12 34 56 a2 0b Short Form NETW MAC 92 Cryo con Model 12 14 Remote Command Summary 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 pending device operations have finished RST Reset the monitor SYSTEM commands SYSTEM DATE Set or query the instrument s
16. 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 12 14 has a constant current excitation mode with three selectable outputs of 10uA 100uA 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 12 14 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 12 14 is the constant voltage excitation mode where current applied to the sensor 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 tempera
17. 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 ISR Bit7 Bit6 Bits Bits Bits Bit2 Bitt Bito Mam ry RYO 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 RIy0 Indicates that Relay 40 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
18. 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 instrument 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 Cryo con Model 12 14 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 digit
19. menu bar or on Comm gt Connect from the main menu to connect to the instrument After a short delay the connect LED should light and the instrument type will be displayed Also most of the grayed out fields on the menu bars should activate 44 Cryo con Model 12 14 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 JD x Pare Cryo con Utility Software dloader File Comm Firmware Calibration Table PID Table View Data Logging Help Serial Terminal X Enter Command Send 4DN Curt 45 Cryo con Model 12 14 Downloading or Uploading a Sensor Calibration Curve Sensor calibration curves may be transferred between the PC and the instrument by using the Calibration Table menu To download a curve send it from the PC to the instrument either select Sensor Curve Download from the shortcut bar or Operations gt Sensor Curve gt Download from the main menu This will cause a file sel
20. modification or misuse operation outside of the environmental specifications for the product or improper site preparation or maintenance The design and implementation of any circuit on this product is the sole responsibility of the Buyer Cryo con does not warrant the Buyer s circuitry or malfunctions of this product that result from the Buyer s circuitry In addition Cryo con 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 Cryo con 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 Cryo con 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 CalGen and Cryo Con are registered trademarks of Cryogenic Control Systems Inc All other product and company names are trademarks or trade names of their respective companies Safety The Model 12 14 does not contain any user serviceable parts Do not open the enclosure Do not install substitute parts or perform an
21. name of a user installed sensor Command Syntax 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 Cryo con Model 12 14 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
22. preamplifier causes erratic voltage values when unconnected Input Channel factory defaults are Sensor Units Kelvin Sensor Type Pt100 385 DIN standard 1000 Platinum RTD Alarm Enables Off To change these press the key then refer to the Input Channel Setup Menu section Instrument setup factory defaults are Display Filter Time Constant 4 0 Seconds Display Resolution 3 digits RS 232 Baud Rate 9600 Data Logging Off To change these press the 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 r NOTE Factory defaults may be restored at any time by use of the following sequence 1 Turn power to the Model 12 14 OFF 2 Press and hold the key while turning power back ON Cryo con Model 12 14 Technical Assistance Trouble shooting guides and user s manuals are available on our web page at http www cryocon com Technical assistance may be also be obtained by contacting Cryo con as follows Cryogenic Control Systems Inc PO Box 7012 Rancho Santa Fe CA 92067 Telephone 858 756 3900 FAX 858 759 3515 e mail techsupport cryocon com For updates to LabVIEW drivers Cryo con utility software and produc
23. real time clock date value SYSTEM DATE SYSTEM TIME Set or query the instrument s real time clock time value SYSTEM TIME SYSTEM DRES Sets or queries the monitor s display resolution Choices SYSTEM DRES 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 Set or query the display filter time constant Available SYSTEM DISTC time constants are 0 5 1 2 4 8 or 16 Seconds 93 Cryo con Model 12 14 A 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 Sets or queries the temperature setting of the high INPUT ALARM HIGHEST temperature alarm for the specified input channel INPUT ALARM LOWEST Sets or queries the temperature setting of the low INPUT ALARM LOWEST temperature alarm for the specified input channel
24. 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 Model 12 14 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 2 A two line format that displays input channels A and Bina Channel B 123 465K large 10mm high format Channel C 93 152K 3 A two line format that displays input channels C and Dina large 10mm high format The display format is selected by pressing the 4 or keys until 1 2 3 3 4 5 K the desired format is displayed E 9 2 1 4 6 K The Home Status display can be selected from anywhere in the instrument s menu tree by pressing escape 4 key Note that pressing the di key will abort any data entry operation that is in progress 21 Cryo con Model 12 14 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 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 ret
25. 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 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 Cryo con Model 12 14 Query commands are used to find out how the instrument
26. 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 I10UA 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 1000 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 1KQ resistors The test equipment recommended for complete calibration is a Fluke 5700A DMM calibrator 57 Cryo con Model 12 14 The Basic Calibration Sequence You must first connect the Model 12 14 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 button 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 a
27. the root menu The first character on each line of these menus is always the input channel identifier which is a superscripted A B C or D Scrolling to a line using the or Y keys and then pressing the 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 are K C F or S Here S selects sensor units Volts or by Ohms gt i Sensor type selection Allows selection of any user or HSen Pt100 385 factory installed sensor Bias voltage used in Constant Voltage bias mode If N A hy sensor does not support voltage bias N A is shown Otherwise selections are 1 0V 10mV 3 3mV and 1 0mV 4 AHigh Alarm 200 000 Santo e Han Tongues 6 Low Alarm 200 0004 ssipanirtetov Tempe sem ee Mart AA ri Table 20 Input Channel Setup Menus HBias Voltage 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 2 for Ohms Sensor Type Selection Line 2 selects the Sensor type for the inp
28. unit identification string The IDN Query will cause the instrument to identify itself The Model 12 14 will return the following string Cryocon Model 12 14 Rev lt fimware rev code gt lt hardware rev code gt Where lt fimware rev code gt is the revision level of the unit s firmware and lt hardware rev code gt is the hardware revision code Current hardware revision codes are A and X3 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 1 in the output queue when all pending device operations have completed Command Syntax OPC Query Syntax OPC Query Response 1 70 Cryo con Model 12 14 SYSTEM commands SYSTEM commands are a group of commands associated with the overall status and configuration of the Model 12 14 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
29. 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 for 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 71 Cryo con Model 12 14 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 inpu
30. 0K 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 Scientific Instruments Inc 410 Diode Curve Range 1 5 to 450K 10uA excitation DIN43760 standard 1000 Platinum RTD Range meer 23 to 1023K 1mA excitation 10000 at 0 C Platinum RTD using DIN43760 standard calibration curve Range 23 to 1023K 100uA excitation 10KQ at 0 C Platinum RTD Temperature Pt10K 385 coefficient 0 00385 Range 23 to 475K 10uA excitation RhFe 27 1mA Rhodium lron 270 at 0 C SI RO 105 Ruthenium Oxide sensor AC RO 105 AC excitation 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 RO 600 AC SI RO 600 Ruthenium Oxide sensor Constant voltage AC excitation 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 12 14 ut
31. 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 12 14 is identical for all interfaces and is SCPI language compliant The Standard Command Protocol for programmable Instruments SCPI is a sub section of the IEEE 488 2 standard and is a tree structured ASCII command language that is commonly used to program laboratory instruments 18 Cryo con Model 12 14 Rear Panel Connections The rear panel of the Model 12 14 is shown here 07100 1204A E Cryogenic Control Systems Inc O 200 240VAC Model 14 Temperature Monitor TAN Max Made in USA Inputs C D Inputs A B Hout Riyi Rlyz BERARE Fuse JAG 1 04 Figure 1 Model 12 14 Rear Panel Layout AC Power Connection The Model 12 14 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 s
32. C 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 Cryo con Model 12 14 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 108 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 64 105 IP 36 patch cable 21 64 105 reset 36 LED indicators 29 Multiplier field 13 Network Configuration 39 OPC command 70 Panel Mount cutout 107 kit 107 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 67 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 voltage excitation 10 current ex
33. EL The short form is truncated to three characters since the fourth character is a vowel 81 Cryo con Model 12 14 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 Where lt num gt is the relay number and is 0 or 1 lt chan gt is source input channel and may be any of the Model 14 s four sensor inputs or Model 12 s two Query Syntax RELAYS lt num gt SOURCE Where lt num gt 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 O 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 Cryo con Model 12 14 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 gt is the relay number and is 0 or 1 lt temp gt is the set point temperature
34. J Favorites ey Media Ea Eyr El Address E http 1192 168 0 4 metconfig htm fr Go Cryo con Model 14 Cryogenic Temperature Monitor Server Configuration REL MAME comi 14999 IP Address 192 168 0 d Subnet Mask 255 255 255 1 Default 255 Gateway Address 192 168 fo 3 TCP Port 5U00 pefault 5000 Cancel Settings do not take effect until the instrument is reset SH Time Server fi Je j fi bo U 3 Optional Name Server fi de hos fo Optional Update Cancel 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 O Che O che Of Cho Off Update Cancel MAC Address 00 90 23 00 00 00 Cryocon Model 14 Rev 1 124 of ESOO A ___y Figure 8 Network Configuration Page This page is used to set the network parameters for the Model 12 14 These parameters are modified by entering new data and clicking on the Submit button 38 Cryo con Model 12 14 Note that if you change settings on this page the Model 12 14 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 Name is optional and is used as a convenience to identify a specific instrument The factory default is CCM14 the last f
35. Temperature Monitor Relay 1 Source Cha High Setpoint 200 000 Enable No Low Setpoint 100 000 Enable No Update Cancel Relay 2 Source ChE High Setpoint 300 000 Enable No Low Setpoint 50 0000 Enable No Update Cancel Analog Output Source ChA Enable ves Gain 0 50000 Offset 300 000 Update Cancel i E GE internet Figure 10 Output Channel Web Page 41 Cryo con Model 12 14 System Configuration Page From the System Configuration page temperature displays and data logging is configured 3 Cryo Con Model 14 Temperature Monitor Microsoft Internet Explorer File Edit View Favorites Tools Help Back b r E bi fal Search Gi Favorites Media 4 Eyr El E Address E http 1192 168 0 4 SysSetup htm Go Cryo con Model 14 Cryogenic Temperature Monitor Display Resolution Full Time Constant 2 Sec Update Cancel Data Logging Logging Enable Ott Interval E Sec Current Count 0 Samples Update Cancel Date Time Date 11 6 2005 iddimrni yyy Time 14 42 29 hhirarn ss Update Cancel El i I mm _y Figure 11 System Configuration Page The Resolution filed 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
36. User s Guide Model 12 14 Cryogenic Temperature Monitor CRYOGENIC CONTROL SYSTEMS ING P O Box 7012 Rancho Santa Fe CA 92067 Tel 858 756 3900 Fax 858 759 3515 www cryocon com O Copyright 2006 Cryogenic Control Systems Inc All Rights Reserved Printing History Edition 5b July 2006 Certification Cryogenic Control Systems Inc Cryo con certifies that this product met its published specifications at the time of shipment Cryo con 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 Cryo con will at its option either repair or replace products which prove to be defective For products returned to Cryo con for warranty service the Buyer shall prepay shipping charges and Cryo con 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 Cryo con from another country Warranty Service For warranty service or repair this product must be returned to a service facility designated by Cryo con 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
37. actory 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 12 14 when the LAN Reset sequence is executed from the front panel The Model 12 14 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 12 14 When the above factory defaults are set the Model 12 14 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 the Model 12 14 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 12 14 address Once connected you may change the network configuration of the Model 12 14 to have any desired values r NOTE The Model 12 14 network configuration parameters may be reset to the factory default values by executing the LAN Reset sequence from the front pane
38. afety standards Power requirement is 25 Watts User replaceable fuses are incorporated in the Power Entry Module 19 Cryo con Model 12 14 AG Line Voltage Selection The Model 12 14 is set at the factory for AC line voltages of 100 120VAC or 200 240VAC The selection is marked on the rear panel above the power entry module Voltage selection can be changed in the field by opening up the unit and moving jumper chips To change the voltage selection please follow the procedure below 1 Disconnect the AC power cord 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 using two 100VAC 120VAC 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 12 14 s fuses and voltage selector switch is made by using a sc
39. al EMFs cannot be generated AC Excitation When a sensor type of ACR or AC Resistance is selected the Model 12 14 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 Cryo con Model 12 14 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 25K hysteresis built into the high and low temperature alarms Analog Output The Model 12 14 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 12 14 All functions and read outs available from the instrument may be completely controlled by any of these interfaces The
40. alternating current power line Earth ground terminal Caution or Warning See instrument documentation l l Background color Yellow Symbol Frame or Chassis terminal and outline Black On AC Power Protective conductor terminal gt e O D Fuse Off AC Power Environmental Conditions Environmental conditions outside of the conditions below may pose a hazard to the operator and surrounding area Indoor use only Altitude to 2000 meters Temperature for safe operation 5 C to 40 C Maximum relative humidity 80 for temperature up to 31 C decreasing linearly to 50 at 40 C Power supply voltage fluctuations not to exceed 10 of the nominal voltage Over voltage category Il Pollution degree 2 Ventilation The instrument has ventilation holes in its side covers Do not block these holes when the instrument is operating Do not operate the instrument in the presence of flammable gases or fumes Operation of any electrical instrument in such an environment is a definite safety hazard 26 Cryo con Model 12 14 The User Interface Overview The Model 12 14 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
41. and Summary 95 Cryo con Model 12 14 96 Cryo con Model 12 14 EU Declaration of Conformity According to ISO IEC Guide 22 and EN 45014 Product Category Process Control Equipment Product Type Temperature Measuring and Control System Model Numbers Model 12 14 Manufacturer s Name Cryogenic Control Systems Inc Manufacturer s Address P O Box 7012 Rancho Santa Fe CA 92067 Tel 858 756 3900 Fax 858 759 3515 The before mentioned products comply with the following EU directives 89 336 EEC Council Directive of 3 May 1989 on the approximation of the laws of the Member States relating to electromagnetic compatibility 73 23 EEC Council Directive of 19 February 1973 on the harmonization of the laws of Member States relating to electrical equipment designed for use within certain voltage limits The compliance of the above mentioned product with the Directives and with the following essential requirements is hereby confirmed Emissions Immunity Safety EN 55011 1998 EN 50082 1 1997 EN 61010 1994 A2 May 96 The technical files and other documentation are on file with Mr Guy Covert President and CEO As the manufacturer we declare under our sole responsibility that the above mentioned products comply with the above named directives Guy D Covert President Cryogenic Control Systems Inc October 15 2005 97 Cryo con Model 12 14 98 Cryo con Model 12 14 Appendix A Installed Sensor Curves
42. art will be displayed for each channel selected The dialog box will show the channel s Input Identifier Name String and a chart of current temperature Channel B i 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 Cryo con Model 12 14 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 Cryo con Utility Software dloader y JC x File Comm Firmware Calibration Table PID Table View Data Logging Help Data Logging Setup Dialog E Input Channels Output Channels Channel A Channel B I Heater Channel E Analog l Channel D Interval 50 SEC e _ On this dialog box check the desired channels and set an Interval value in Seconds The minimum interval is 0 1 Second 50 Cryo con Model 12 14 When the Start button is clicked a file selection dialog box will be shown el Cryo con Utility Software divader Jol xj File Comm Firmware Calibration Table PID Table View Datalogging Help Firmware Labview __ USEdrive
43. 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 volts 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 Cryo con Model 12 14 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 r 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 12 14 lt curve name gt is a name to be assigned to the calibration curve lt is a minimum of 4 and a maximum of 15 ASCII characters lt sensor type gt is from the following list SiDiod
44. asurement Errors ii 104 Remote O POPES tedio ili 105 Appendix C Enclosure Options i 107 Panel MOUNT id ustavatitvatsaialasttaaitealantiiactavany 107 Panel Cuota e a 107 Ranel Mouse 107 ASU UO VAT SEND sa 108 111 Cryo con Model 12 14 Index of Tables Fable Moda de ESTE 1 Table 2 Model 12 14 Instrument AccessorieS ii 5 Fable 33 CryOgeniG ACCESSOMES Lar 5 Table 4 Voltage Bias Selections iii 10 Table 5 NTC Resistor Measurement Accuracy iii 11 Table 6 Supported SENSORS Jaaa 12 Table 7 PTC Resistor Sensor Configuration iii 13 Table 8 NTC Resistor Sensor Configuration 13 Table 9 Sensor Performance for Diodes and Pt Sensors ii 14 Table 10 Sensor Performance for NTC sensors 15 Table 11 Faetory Installed Sensors nea 16 Table 12 AG PowerLine FUSES 4 20 Table 13 Sensor Input Connector PiNOUt e 22 Table 14 Dual Sensor Cable Color Codes i 23 Table T9 RS 23200 NN 24 Table 16 Relay Connector PIDE See 25 Table 7 Function Key DSSChDUONS usos 28 Table 19 Model 12 14 Root Menu rrannrnnannvnnnnnvrnnnrvnanrnnnnnrvnnnnrnnannnnnnnnvnnnnrnnnnnrnnnnnrnnanennannnnnannnnnnnnennnnnene 31 Table 20 Input Channel Setup Menus cccocccccccnccccnnccoconococononocononononnnnnnonnnnonnnnnonannnonnn
45. 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 require the user to stabalize the input temperature at three user selected points
46. can minimize these effects The most effective method of minimizing thermocouple DC offsets is to wire temperature sensors so that connections between dissimilar metals are grouped together For example the connection between sensor leads and cryostat wiring should be kept close together This way the Thermocouple junctions formed by the connection will have equal but opposite voltages and will cancel each other Frequently sensor leads are 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 Cryo con Model 12 14 RS 232 Connections The Model 12 14 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 RXD Receive data TXD Transmit data The cable used to connect the Model 12 14 to a computer serial i c port is a Dual Female Null Modem cable An example is Digikey Inc se o one art number AE1033 ND i Table 15 RS 232 Connection The wiring diagram for this cable is shown below Note t
47. citation 10 fault 30 index 75 76 77 ISENIX 75 multiplier 91 name 89 NTC resistor 11 Cryo con Model 12 14 power dissipation 10 selection 32 self heating 10 11 SENIX 77 type 32 74 90 units 13 30 32 40 73 74 94 USENIX 76 Wiring 23 Sensor Curve File 340 format 43 CRV format 43 SENTYPE commands 89 Silicon Diode 12 Standard Event Register 68 Standard Event Status Enable 93 STB 67 68 69 Strip Chart 49 Supported Sensors 7 Technical Assistance 4 Temperatue Units Selection 32 Temperature Sensors Carbon Glass 7 Cernox 7 12 13 15 101 DT 470 99 DT 670 99 GaAlAs Diode 7 Germanium 7 13 Index 3 NTC resistor 13 PT100 99 PT10K 99 PT1K 99 Rhodium Iron 7 99 RO 105 99 RO 600 99 RTD 7 99 Ruthenium Oxide 7 99 Ruthenium Oxide 13 5700 5 16 99 SI 410 99 Silicon Diode 5 7 16 99 Thermistors 7 13 The Home Status Display 27 Thermal EMF s 23 thermocouple effects 16 Time Date 36 VFD display 27 web browser 39 63 64 92 Web Server Inputs Page 40 Network Configuration 38 outputs page 41 Status Page 37 System Page 42
48. d by the specific 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 46 Cryo con Model 12 14 The Multiplier field is used to select the sign of the sensor s temperature coefficient A value of 1 selects a Negative Temperature Coefficient sensor while a value of 1 selects a Positive Temperature Coefficient The Unit field selects the units used in the calibration curve Choices are Volts Ohms or LogOhm Checking the Save as crv will save the curve to disk as a 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 Sensor Curve Output Volts 0 100 200 300 400 500 600 Temperature K 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 12 14 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 Cancel 47 Cryo con Model 12 14 When OK is selected the sensor calibration curve will be downloaded to the instrument During the transf
49. d for this purpose 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 12 14 has two green LEDs The left most LED indicates that a valid connection has been made to a hub or computer n 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 Li Possible problems are 1 Using the wrong type of cable For example using a Crossover Cable Connected Activity to connect the Model 12 14 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 Cryo con Model 12 14 Sensor Connections All four sensor connections are made at the rear panel of the Model 12 14 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 12 14 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 fol
50. e R250K10UA R62K10UA R31K10UA R15K10UA R8K10UA R625R1MA R312R1MA R156R1MA or 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 Cryo con Model 12 14 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 Cryocon S700 Short Form SENT CALDATA NAME Name for a user installed sensor Sets or queries the
51. eSiIStors iii 62 Remote Operation lla leali 63 Remote Interface Configuration 63 Ethernet Configuration 63 RS 232 COonliguration riali eee 65 Introduction to Remote Programming 66 STUETONS alli lalla 66 reader lei lee aaa 66 Truncation of Keywords i 67 SUPL Status Regist Sii ei 67 The Instrument Status Register 67 The Instrument Status Enable Register cocoooncococonnnncccononos 67 The Standard Event Register ii 68 The Standard Event Enable Register 68 Tre Status BlE s re 68 The Status Byte Register ii 69 Remote CommandS iii 70 IEEE488 Common commandS 70 SYSTEM COMMandS eds tee SSN 71 INPUT commands leali las 73 Relay Command S ii ered oo 81 CALCUR commands iio 87 CALDATA and SENTYPE CommandsSs 89 Network CommandsS i 92 EU Declaration of Conformity i 97 Appendix A Installed Sensor Curves i 99 Factory Installed Curves rrrrnnnnrnnnnnnnnnvnnnnrnvnnnnrnnnnnsnnnnnnnrnnnnnnrnnnnnnsen 99 Cryo con Model 12 14 User Installed Sensor CUFVESs i 100 Sensor GUIVES ON OD eee 101 Appendix B Troubleshooting Guide 103 ETOP DISDIAY Salad 103 Temperature Me
52. ection dialog box to appear as follows E pe1003902 cre E TCTypeT crw E PT1K375 crw CreocalD3 crw E curve ll cry E PT1K 05 crv Curved Lery 51410 crw Ei Cx1030E 1 crv TCTypeE crv TCTypek cry Files of type Curve Files cry 340 Cancel i 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 Cryo con CRV files are ASCII text files that may be edited by any text editor After selecting the file and clicking on Open the selected file will be read and the Edit Curve Header dialog box will appear This box contains information extracted from the curve file header that can be modified if desired before the curve is downloaded Edit Curve Header E i a xj sensor Mame TCAUFE pet Sensor Type Tce Multiolier 1 Unit volts Number of Pts 101 Abort Display Curve Save as crtile 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 Cryo con instruments support different types of sensors Therefore it is important to enter a sensor type that is supporte
53. efficient 0 003902 Q C Range 73K to 833K PT1K375 crv Platinum RTD 10000 at 0 C Temperature coefficient 0 00375 Q C Range 73K to 833K 101 Cryo con Model 12 14 102 Cryo con Model 12 14 Appendix B Troubleshooting Guide Error Displays 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 Or an erratic display of Sensor Connections section temperature 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 103 Cryo con Model 12 14 Temperature Measurement Errors Noise on temperature Possible causes measurements Excessive noise pickup especially AC power line noise Check your wiring and shielding Sensors m
54. enient 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 2 Wapor Pressure Calculator xX Substance Water Pressure 760 Torr Temperature Units k Temperature 373 1571 kK You must select the Substance from a drop down list and then select the barometric pressure and temperature units Substance selections are shown here 2 apor Pressure Calculator y i x Substance Ethyl Alcohol Carbon Dioxide Nitrogen Helium 4 Fi Pressure Temperature Units Calculate Temperature 373 1571 kK 56 Cryo con Model 12 14 Instrument Calibration Calibration of the Model 12 14 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 12 14 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 measurement range is the simple process of generating an offset and gain value However since there are several input ranges available on each sensor input the process can be time con
55. er 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 Flexible Help interface that documents all instrument remote commands with a cut and paste type interface 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 Cryo con Model 12 14 Connecting to an Instrument The desired remote interface connection may be selected by clicking Comm gt Port Select from the main menu TA Cryo con Utility Software dloader y g Ioj x Comm Operations Data Logging View Help User Options be Sensor kurve Download PI Table Download x a Interact select the portto communicate with controller CalG Click GPIB to change GPIB address _ Caen C R5232 Data Logging e me Upload Mata C GPIB eed LAN Connect Comm Type LAN LAM Not Connected Ho Device Wer Select the desired communications port and then click OK Click on the Connect button of the shortcut
56. er curve data points will be displayed in the window s main pane Upon completion the Download Complete dialog box will appear e Cryo con Utility Software dio D x File Comm Firmware Calibration Table PIC Table View Data Logging Help 155 449997 413 149994 163 369995 433 149994 171 289993 453 149994 179 210007 473 149994 187 139999 493 149994 195 059998 513 150024 202 979996 533 150024 210 899994 553 150024 218 820007 573 150024 226 740005 593 150074 234 660004 613 1500 242 569996 633 1500 250 509995 653 1500 2568 429993 673 1500 Downloading to Calibration Curve 1 Please walt 266 350006 693 1500 EE ES Ea a a a a eee nee 274 269989 713 1500 Us III III LI LI LIL LLL 100 282 190002 733 1500 290 109985 753 1500 2986 040009 773 150021 ae de 305 959991 793 150024 313 860005 813 150024 321 7999886 833 150024 Ready 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 Cryo con Model 12 14 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 ch
57. essing the 4 key will return to the Root Menu 33 Cryo con Model 12 14 The Analog Output Menu The Model 12 14 s analog output is programmed from this menu It is selected from the Root Menu Analog Output Menu Select the controlling input source 1 Channel ChA Mo Pra Enable th tout Selecti 2 Anal og Enable Yes M vemo TT Offset 300 000 Offset temperature Gain 0 50000 Gain unites Table 21 Analog Output Setup Menu Setting the Analog Output 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 12 14 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 High temperature relay enable 2 tHigh Enable Nom 3 tLow 200 000 Low temperature relay enable 4 1Low Enable Yesn 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 usi
58. gain 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 x Si Diode V Si Diode Im DC 10044 DE 1048 DC 1048 AC 10048 AC 1m8 AC 1 oof 8 Steps Calibration Reults Channel A Current Step Calibrating CHA Silicon Diode Volt ale 1 9 Apply 1 9 and enter actual volt 2 Capture Abort 3 0 5 Apply 0 5 and enter actual volt Capture A bart Cancel APPLY Calibrate Status Current Gain 1 Offset poo Merit Password Ehange Password Ja Figure 12 Instrument Calibration Screen r Note Newer Cryo con instruments 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 cryocon 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 calibration of a single input channel all calibration types must be calibrated Note the Calibration Results box on the screen The Statu
59. hannels 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 Cryo con Model 14 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 user 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 c NOTE The Model 12 14 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 12 14 will delay about 10 seconds before showing the power up screen Cryo con Model 12 14 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 Note that in some cases there will be an erratic temperature display when no sensor is connected This is not an error condition The high input impedance of the monitor s input
60. hat communication with the Model 12 14 only requires connection of pins 2 3 and 5 All other connections are optional Modem TN Model 34 DCD xz gt _ DCD iy FX TX 3 3 TX DTR 4 4 DTR DSR 6 6 DSR RTS 7 ES CTS 8 8 CTS RI 9 IIIN gt O RI DB9 DB9 DB9 DB9 Male Female Female Male Figure 5 RS 232 Null Modem Cable 24 Cryo con Model 12 14 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 Cryo con 04 4 Jaour a alfa The Analog Output of the Model 12 14 will output zero to 4 096 Volts and 3 Relayino oO has a 1000 Ohm output impedance Connections are made using pins 1 4 Relay 1 Common 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 Relay1NO to Pin Two 6 Foley 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 l
61. ible If the Input Channel has been disabled a blank display is shown Fahrenheit 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 Cryo con Model 12 14 Instrument Setup Menus The root of the instrument s setup menus is accessed by pressing the 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 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 6 Relay1 Setup 8 seupinputReay gt 8 System Setup amp Goto the System Setup Menu 9 Net Config B Gotothe Network Configuration Menu Table 19 Model 12 14 Root Menu 31 Cryo con Model 12 14 Input Channel Setup Menu The Input Channel Setup menus are used to configure the two input channels They are accessed from
62. ic 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 alt for the process to complete Press the Abort button to terminate the process When the capture is complete dismiss the following dialog Cryo con Utility Software EA 59 Cryo con Model 12 14 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 the 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 ha
63. ilities 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 16 Cryo con Model 12 14 measurement errors induced by thermal EMFs can result in unacceptable measurement errors 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 Therefore 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 Therm
64. ill 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 12 14 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 12 14 SMTP The Simple Mail Transport Protocol is used to send E mail from the Model 12 14 to a 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 12 14 will periodically query 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 app
65. in display units K F C or SJ Floating Point string Query Example INP B TEMP Example Response 12 45933 Short Form INP lt channel gt TEMP 73 Cryo con Model 12 14 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 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 Cryo con Model 12 14 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 descript
66. ine by twenty character dot matrix VFD Enclosure The Model 12 14 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 Model 12 14 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 Cryo con Model 12 14 Safety Symbols O H de Direct current power line Equipment protected throughout by double insulation or reinforced insulation equivalent to Class Il 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
67. ion 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 ISENIX 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 Cryo con Model 12 14 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 sen
68. is not a type ACR the response will always be N A Short Form INP VBIAS 80 Cryo con Model 12 14 Relay Commands The relay subsystem includes the two auxiliary relays in the Model 12 14 Using the RELAYS commands these relays may be independently configured to assert or clear based on the status of any of the four sensor input channels Relay outputs are dry contact and are available on the rear panel of the instrument The user selectable display time constant filter is applied to input channel temperature data before relay conditions are tested RELAYS Relay Status Query The two auxiliary relays available in the Model 12 14 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 gt 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 R
69. l 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 12 14 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 12 14 in the same ASCII command language as the RS 232 port 64 Cryo con Model 12 14 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 monitor any combination of the following characters must be sent to terminate the line 1 Carriage Return Hex OxD 2 Line Feed n Hex OxA 3 Null O The monitor will always return the carriage return linefeed r n character sequence at the end of each line 65 Cryo con Model 12 14 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 c
70. lay 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 Cryo con Model 12 14 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 Cryo con Model 12 14 Input Channels There are two independent multi purpose input channels on the Model 12 and four on the Model 14 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
71. lication protocols that can run over it In the Model 12 14 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 12 14 must be within the range of the computers you want it to communicate with The range is determined by the Subnet Mask The Model 12 14 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 12 14 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 12 14 IP address 192 168 0 x and connect to the instrument using a crossover cable between your PC and the Model 12 14 Once the IP is correctly 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 http 192 168 0 4 and it will take you to the Model 12 14 s Home Page From the Model 12 14 s web page you can completely configure the instrument to meet your network requirements 63 Cryo con Model 12 14 Web site configuration The Model 12 14 f
72. lows Figure 4 Input Connector Input chit Connector Signal Pin ChA Current 8 ChA Current 9 ChA Sense ChB Current ChB Current ChB Sense ChC Current ChC Current ChC Sense ChC Sense ChD Current 7 ChD Sense ChD Sense 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 Cryo con Model 12 14 Color codes for the Dual Sensor Cable Cryo con part number 4034 038 are as follows Input ona we Curent 8 current 9 ona Red Senseo 4 es vie carentes e ome Green Comento 7 ene mer see 4 ene bar Sense 2 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 V Four Wire Resistor Sensor Four Wire Diode Sensor VE 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
73. m 100 to 120VAC Cryogenic temperature monitor with four standard multi Model 14 220 function sensor input channels set for AC power line voltages from 200 to 220VAC Table 1 Model Identification Supplied Items Verify that you have received the following items with your monitor If anything is missing contact Cryogenic Control Systems Inc directly Model 12 or 14 Cryogenic Temperature Monitor User s Manual PN 3038 029 Cryo con software CD PN 4034 029 Two dual input connector cable assemblies 4034 038 Relay Aout connector 6 pin terminal block plug 04 0302 Doo O O Certificate of Calibration Cryo con Model 12 14 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 c
74. nccnoncnnnnoncnnnnnas 41 System Configuration Page ii 42 Cryo con UN SONWANE A ISA a 43 Installing the Utility Software 43 Connecting to an Instrument 44 Using the Interactive Terminal 45 Downloading or Uploading a Sensor Calibration Curve 46 Using the Real Time Strip ChatrtS i 49 Data LOG Min ind add 50 Remote V O command HELP ca id 52 CalGen Calibration Curve Generator 53 CalGen Initial Setup i 53 Using CalGen With Diode SEensors 53 Using CalGen With Resistor SEnSsors 53 Example CalGen Procedure i 53 The Vapor Pressure Calculator 56 Instrument Calibration i 57 Cryo con Calibration SErvices 57 Calibration Intervali ee eee 57 Minimum Required EQUIPMENL 57 The Basic Calibration Sequence 58 Manual Calibration ii ari 59 Automatic Calibrati0N cocoocccccccncccncnccccnnnocnnnconnnnnnnnnononononononos 59 Summary of Calibration TYpeS 61 Calibration of Silicon Diodes 62 Diode Voltage Calibration 62 Constant current Source Calibration 62 Calibration of DC resistors ii 62 Calibration of AC r
75. ng the Ena 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 Cryo con Model 12 14 The System Setup Menu The System Functions Menu is used to set many of the instrument s parameters including display resolution I O port settings etc It is selected from the Root Menu System Functions Menu Sets the display time constant in 1 DisplyTC 2S hy seconds Selections range from 0 5S to 16S a Sets the resolution Selections are 1 2 DisplyRS 3 he El RS232 9600 Selects the RS 232 baud rate Start or stop data logging to an internal Data Log Cnt 195 Erase Data in Log 8 Table 23 System Functions Menu N lt N 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 po
76. ngs 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 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 n The monitor would sort the above table in
77. nonnnnnnannnonannnenanenes 32 Table 21 Analog Output Setup MenNu cccooccncccccnccccnnccocononocononcnnonononononnnnnnnnonnnnnonnnnonnnnnnnnnnnnnrnnnnananenanenes 34 Table 227Relay Setup Men eee 34 Table 23 System Functions Men vies lille ia a 35 Table 24 Remote Command Summary i 95 Index of Figures Figure 1 Model 12 14 Rear Panel Layout rrrrrnnnnrrnnnnnrvnrnnnnnrnnnnrnnnnnnrnnvnnnnrnnnnnnrnnnnnnenrnnnnrnnnnnnsnnnnnnnennnnn 19 Figure 9 EAN RJ 45 POT lella 21 Figure 6 Model 12 14 Front Panel scsi dalla ius 21 Figure 7 Model 12 14 Web Site Status Page iii 37 Figure 8 Network Configuration Page iii 38 Figure 11 System Configuration Page seais lla 42 Figure 12 Instrument Galibration SCre6fi aiii 58 Cryo con Model 12 14 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 Cryogenic temperature monitor with two standard multi Model 12 110 function sensor input channels set for AC power line voltages from 100 to 120VAC Cryogenic temperature monitor with two standard multi Model 12 220 function sensor input channels set for AC power line voltages from 200 to 220VAC Cryogenic temperature monitor with four standard multi Model 14 110 function sensor input channels set for AC power line voltages fro
78. ole and then installing the panel mount kit Cryo con part number 4012 020 Drawings and assembly of the panel mount kit are shown here 107 Cryo con Model 12 14 Instrument Stand The Instrument Stand accessory Cryo con part number 4012 021 is used to mount the Model 12 14 on a bench top It tilts the instrument up by 15 for an improved viewing angle 108 Cryo con Model 12 14 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 42 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 MA
79. omposed 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 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
80. or 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 Query 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 Cryo con Model 12 14 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
81. ote Command Reference Print Cancel 52 Cryo con Model 12 14 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 Most Cryo con temperature controllers support CalGen directly on the instrument However the utility software package implements the same algorithm and can be used with virtually any instrument capable of measuring temperature 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 sensor curve Using CalGen With Diode Sensors Options for generating Diode
82. our 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 r NOTE If you are connecting the Model 12 14 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 12 14 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 Cryo con Model 12 14 The Input Channel Configuration Page This page is used to set the characteristics of each input channel including sensor type units and alarm conditions
83. r __ UsersManual File name Save as type MSExcel Comma Separated value Files cz Cancel si From this dialog box enter a file name and select the directory where data logging results will be saved As soon as the Save button is clicked the software will begin continuous data logging to the specified file While data logging is in progress a dialog box will be displayed that allows the user to stop logging When this Stop button is clicked logging is stopped and the log file is closed SI Cryo con Model 12 14 Remote I O command HELP Help for the remote interfaces and remote commands is available by clicking on the HELP gt Contents button from the Utility Software s main menu A standard HELP screen will be shown that is indexed and searchable 2 Cryo con Utility Software dloader ioj x File Comm Firmware Calibration Table PID Table View Data Logging Help Help Topics Cryocon Remote Interface Help E gt x Contents Index Find Click a topic and then click Display Or click another tab such as Index Remote Interface Configuration Remote O Data Types Instrument Status Register 15A Instrument Status Enable Register 15E 19 The Standard Event Register E SF 9 The Standard Event Enable Register ESE 2 The Status Byte STE 2 The Status Enable Register SAE Mame Strings 19 Curve Multiplier 19 Curve Units 19 Sensor Types B Input Channel Designators d Rem
84. rewdriver 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 Littelfuse 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 Cryo con Model 12 14 Ethernet LAN Connection The 10BaseT Ethernet network RJ 45 system is used by the Model 12 14 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 ETHERNET Name _ Description Transmit Data Transmit Data Receive Data Not Connected Not Connected Receive Data 7 Not Connected Not Connected Figure 3 LAN RJ 45 Pinout 10BaseT Straight Through Patch Cable When connecting the Model 12 14 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 12 14 directly to the computer the transmit data pins of the computer should be wired to the receive data pins of the Model 12 14 and vice versa The 10BaseT crossover cable should be use
85. rmed by using the SI Diode I tab On this screen only an upper target value is required since the current source only requires a gain term The upper target requires connection of a 100KQ resistor The actual value should be within 10 of 100KQ Calibration of DC resistors Resistor sensors that use direct current excitation are calibrated by using the 1mA DC 100uA DC and 10uA DC tabs Resistors required for calibration are as follows OQ 1mA DC Upper 1000 Lower 100 2 100uA DC Upper 1 000 Q Lower 100 Q a 10uA DC Upper 10 000 Q Lower 1 000 Q 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 QO 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 Q 62 Cryo con Model 12 14 Remote Operation Remote Interface Configuration The Model 12 14 has two remote interfaces The 10 BaseT Ethernet LAN and the RS 232 Connection to these interfaces is made on the rear panel 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 w
86. s Time Date Setup Menu 1 Time 11 04 03 8 2 Date 7 1 04 8 k Enable automatic daylight savings 3 Daylight No n 36 Cryo con Model 12 14 The Model 12 14 Web Site The Status Page The Home or Status Page is shown here 3 Cryo Con Model 14 Temperature Monitor Microsoft Internet Explorer File Edit View Favorites Tools Help ga Back mp 3 fat O search Gg Favorites FP Media E Eyr EY Address El http 1192 168 0 index htm ED Cryo con Model 14 Cryogenic Temperature Monitor Temperature Channel A 302 95376K Channel B 301 217K Channel 301 896K Channel D 301 481K Relays Relay 1 Source ChA Status Off Relay 2 Source Che Status Off Analog Output Source ChA Status 1 189 Volts Instrument Date 11 6 2005 Time 14 37 36 Status COoMI4 9999 Cryocon Model 14 Rev 1 124 E T Internet Z Figure 7 Model 12 14 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 Cryo con Model 12 14 The Network Configuration page The Network Configuration page is accessed by clicking on the Net Config field of the top navigation bar 3 Model 14 Network Configuration Microsoft Internet Explorer File Edit View Favorites Tools Help se Back mb 3 O search
87. s and Pt Sensors 14 Cryo con Model 12 14 Sensor Type Hj 2 Carbon Glass Example Sensor RX102A CGR 1 500 CX 1050 1 4K 520KQ K 1 4K 240KQ K 1 0K 12600 K Sensor Sensitivity Measurement Accuracy Temperature Measurement Accuracy Measurement Resolution Temperature Resolution 4 2K 80 30 K 20K 3 960 K 1 0K 1 90 4 2K 1 40 20K 1 090 1 0K 1 9mK 4 2K 17mK 20K 275mK 2 0K 11mO 4 2K 11mQ 20K 11mQ 2 0K 32uK 4 2K 0 13mK 20K 2 9mK 1 0K 42nW Power Dissipation 4 2K 73nW resistance 10mV Constant Voltage bias Table 10 Sensor Performance for NTC sensors 15 4 2K 4220 K TIK 0 1Q K 300K 0 01Q K 1 4K 7280 4 2K 0 580 TIK 14mQ 300K 0 020 1 4K 1 4mK 4 2K 1 4mK TIK 150mK 300K 2 1K 4 2K 11mQ TIK 0 2mQ 300K 0 2m0 4 2K 30uK TIK 1 2mK 300K 12mK 1 4K 962pW 4 2K 171nW Moderate 4 2K 2290Q K TIK 2 15QR K 300K 0 160 K 1 4K 675Q 4 2K 5 10 TIK 161mQ 300K 40mQ 1 4K 1 1nW 4 2K 20nW lt 1 for H lt 2T Cryo con Model 12 14 Factory Installed Sensors A listing of the sensors installed in the Model 12 14 is given below Additional information about these devices can be found in Appendix A Name Description Z O o o Crvo con S700 Cryo con S700 series Silicon Diode Range 1 4 Li to 495K 10uA constant current excitation Lakeshore Silicon Diode Curve 11 for DT 670 LS DT 670 series diodes Range 1 4 to 50
88. s field will initially be set to Current and the Gain and Offset values shown will be those read from the instrument c 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 Cryo con Model 12 14 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 Ohms depending on the calibration type Nominal value is 0 0 Positive or negative numbers are accepted It is usually calculated by Offset UT gain UM Automat
89. s 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 date string in double quotes Command Example SYSTEM DATE 15 8 2003 Sets the Model 12 14 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 12 14 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 Cryo con Model 12 14 SYSTEM RESEED Re seed the display filters Re seeds the input channel s averaging filter allowing it to settle significantly faster Command Syn
90. setting the sensor to none Pt1K 385 10000 at 0 C Platinum RTD using DIN43760 standard calibration curve Range 23 to 1023K 100uA excitation 99 Cryo con Model 12 14 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 When using the CALCUR commands only user curves are addressed therefore the user index usenix shown above Is used ojo 4 4 Usersensort a a 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 1 100 Cryo con Model 12 14 Sensor Curves on CD The following sensors are available on the CD supplied Cryocon 5700 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 Sl 410 Silicon Diode Range 1 5 to 450K Curve10 crv Lakeshore Curve 10 Silicon Diode curve for DT 470 series diodes Range 1 4 to 495K Curve11 crv Lakeshore Curve 10 Silicon Diode curve for DT 670 series diodes Range 1 4 to 500K PT100385 crv Cryocon CP 100 DIN43760 or IEC 751 standard Platinum RTD 1000 at 0 C Range 23 to 1020K PT1K385 crv DIN43760 or IEC751 standard Platinum RTD 10000 at 0 C Range 23 to 1020K PT1003902 crv Platinum RTD 100Q at 09C Temperature co
91. sor 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 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 Cryo con Model 12 14 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
92. ssible RS 232 RS232 Rate is an enumeration of the RS 232 baud rate Choices are 9600 19 200 38 400 and 57 600 r 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 next 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 to begin the erasure sequence The unit will then request confirmation Data accumulated into the log may be read out by using Cryo con s utility software or by use of remote commands 35 Cryo con Model 12 14 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 Network Configuration Menu Press to change the unit s Press to reset all Ethernet LAN 2 Reset Net Confi g E settings 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 setting
93. suming 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 Cryo con 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 Cryo con Calibration Services When the controller is due for calibration contact Cryo con for low cost recalibration The Model 12 14 is supported on our automated calibration systems which allow Cryo con to provide this service at competitive prices Calibration Interval The Model 12 14 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 Cryo con does not recommend extending calibration intervals beyond 2 years Whatever calibration interval you select Cryo con recommends that complete re adjustment should always be performed at the calibration interval This will increase your confidence that the instrument will remain within specification for the next calibration interval This criterion for re adjustment provides the best measure of the instrument s long term
94. t 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 temperature is exceeded an enabled high temperature alarm condition will be asserted Temperature is assumed to be in the display units of the selected input channel There is a 0 25K hysteresis in the assertion of a high or low temperature alarm condition 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 uni
95. t 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 12 14 series is 2 006 Current Hardware Revision Level As of January 9 2006 the current hardware revision level for the Model 12 14 series is B Hardware cannot be upgraded in the field Returning Equipment If an instrument must be returned to Cryo con 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 Cryo con s shipping address is Cryogenic Control Systems Inc 17279 La Brisa Street Rancho Santa Fe CA 92067 Cryo con Model 12 14 Options and Accessories Instrument Accessories RS 232 Null Modem Cable 6 AC Power Cord Additional User s Manual CD Table 2 Model 12 14 Instrument Accessories Cryogenic Accessories CP 100 series Ceramic Wound RTD 100Q GP 100 series Glass Wound RTD 100Q CPX 100 series Thin Film Platinum RTD 100Q CPX 1K series Thin Film Platinum RTD
96. t 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 43210 Short Form REL LOW 84 Cryo con Model 12 14 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 gt 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 Cryo con Model 12 14 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 Synta
97. t 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 12 14 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 Cryo con Model 12 14 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 Tvpe Sensor Sensor TC yP Type Excitation Units Platinum 1000 R625R1MA 1 0mA AC DC Platinum 10000 R6K100UA 100uA AC DC Calibration Platinum 10KQ lt 425K R16K10UA 10uA AC DC Ohms Rhodium Iron R312R1MA 1 0mA AC DC Table 7 PTC Resistor Sensor Configuration Ohms NTC Resistor Sensor Devices The Model 12 14 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
98. tage mode sensors 4mA DC 0 2 5VDC 1 OmA DC measurement of 100 Platinum RTD sensors 100uA DC 0 2 5VDC 1004A ER of 1K Ohm Platinum DC measurement of 10K Ohm 10uA DC 0 2 5VDC 10uA Platinum RTDs or other resistor sensors that use DC current excitation 61 Cryo con Model 12 14 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 10uA current source Note that the voltage calibration must always be done first since the current source calibration requires a precision voltage reading Diode Voltage Calibration To calibrate the diode voltage range click on the SI Diode V tab and follow the sequence described above to send Gain and Offset values to the instrument The upper target requires connection of a 1 9 Volt source The actual value is between 1 0 Volts and 2 4 Volts If you do not have a precision voltage source you can use a 1 5 Volt battery by using a high precision volt meter to measure it s actual 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 perfo
99. tax 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 display 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 SJ 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
100. tility software can be used to talk to the monitor over the RS 232 port using the terminal mode All command and response strings are displayed This is a good way to establish a connection Intermittent lockup on Possible causes IMENesa 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 Can t talk to the LAN Possible causes Interface 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 Cryo con 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 105 Cryo con Model 12 14 106 Cryo con Model 12 14 Appendix C Enclosure Options Panel Mounting Panel Cutout Shown here is a cut out drawing for panel mounting of the Model 12 14 TV Panel Mount Kit The Model 12 14 mounts to panel by sliding the enclosure through a panel cut out h
101. 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 Bur eis ees pie bia eno em om Where Bit6 ROS 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 68 Cryo con Model 12 14 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 Cryo con Model 12 14 Remote Commands IEEE488 Common commands The Common Commands are defined by the IEEE 488 2 standard and are supported by the Model 12 14 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
102. to the previous level cursor display will indicate function Table 17 Function Key Descriptions 28 Cryo con Model 12 14 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 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 Cryo con Model 12 14 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 justified in order to display the maximum number of significant digits poss
103. ts of Kelvin Short Form INP lt channel gt ALAR HIGH 78 Cryo con Model 12 14 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 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 f
104. ture 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 20KO 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 yo P bias R sensor 10 Cryo con Model 12 14 The tradeoff in measurement accuracy vs minimum sensor excitation current is taken for two reasons 1 The sensitivity of NTC resistor 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 In order to minimize large jumps in self heating the Model
105. urn to the Home Display press the 4 key ChC Setup To navigate the menu move the cursor up or down by pressing CNhD Setup the d or Y keys The cursor will scroll down to show additional lines To select the line at the current cursor position press the 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 key is pressed the cursor will change into a data selection cursor as follows M 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 key To abort the selection process without making any change press the d key FF 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 key To abort entry without making any changes press the amp key 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 selection mode abort entry and return to scroll mode cursor display will indicate function Scroll Display DOWN Scroll to NEXT selection 1 In data selection mode scroll to PREVIOUS selection 2 Within a setup menu return up the menu tree
106. ust 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 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 Possible causes temperature measurements 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 No temperature Review the Error Displays section above reading 104 Cryo con Model 12 14 Remote I O problems Can t talk to RS 232 Possible causes Interface 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 Cryo con monitors This cable is detailed in the RS 232 Connections section Debugging tip Cryo con u
107. ut 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 Cryo con Model 12 14 Bias Voltage Selection The Model 12 14 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 0 10 0mV 3 3mV and 1 0mV to indicate the voltage that is held on the sensor The Model 12 14 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 12 14 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 Pr
108. ve 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 Cryo con Model 12 14 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 Denia Type Range Current p SI DiodeV 0 25V N A Voltage measurement for use with Silicon Diode temperature sensors SI Diode I N A 10uA 10uA constant current source used with Silicon Diode sensors 4mA AC 10mV 1 25Hz Autoranged 1mA range used with constant voltage mode sensors 100uA AC 10mV 1 25Hz Autoranged 190HA range used with constant voltage mode sensors 10uA AC 10mV 1 25Hz Autoranged 10H range used with constant vol
109. x RELAYS lt num gt LOENA lt status gt Where lt num gt is the relay number and is 0 or 1 lt status gt is the status of the low temperature enable lt status gt may be either YES or NO Query Syntax RELAYS lt num gt LOENA Query Response lt status gt Where lt num gt 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 Cryo con Model 12 14 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 12 14 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 readi
110. y unauthorized modification to the product For service or repair return the product to Cryo con or an authorized service center Cryo con Model 12 14 Table of Contents Preparing the Monitor for US ooocccccccnoncccocnncoconnnoconcnnnonanoncnnannncnnnos 1 Modelldenmealibn salita 1 SUPPE ENN 1 Verify the AC Power Line Voltage Selection 2 Apply Power to the Monitor ii 2 Factory Default SeEUP oia a eaasesgnnd 3 Technical ASS ENE 4 FRETUPMING Equipment sil 4 Options and ACCESSOMOS cu ala 5 Instrument ACcCESssories D Cryogenic Accessories ii D Specifications Features and FUNCHIONS 7 Specitication SUMIMANY ca diabetes teas 7 NU ENER 2 10 Constant Current Sensor Excitation 10 Constant Voltage Sensor Excitation 10 Supported Sensor Types ii 12 Sensor Performance SUMMAFy 14 Factory Installed Sensors 16 CalGen Calibration Curve Generator 16 Thermal EMF and AC Bias ISSUES 16 Output Channel Features iii 18 MANNS 18 NAT 18 Relay ONE 18 Remote Interfaces cooocccccccncccocnnococonononnncnnnnononnonanononannnonannononnnenanenes 18 Rear Panel Connections iii 19 AC Power Connection i 19

Model 14 User's Manual

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