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1. AC excitation of resistive sensors increases temperature range and improves sensitivity Analog voltage output plus two programmable dry contact relays Continuous data logging into internal Non Volatile Memory High speed Ethernet interface Electrically isolated Built in web server Temperature monitoring and instrument configuration can be performed using any web browser TCP IP User Data Socket for complete remote operation using a simple IEEE 488 like command language SMTP interface sends e mail on a selected alarm condition LabView drivers available for both the Ethernet TCIP IP and serial port Sensor Inputs The Model 9302 amp 9304 can be easily configured to support virtually any cryogenic temperature sensor Configuration is performed from the instrument s front panel or a remote interface There are no jumpers trim pots or switches Silicon Diode sensors from Scientific Instruments or any other manufacturer are directly supported over their full 1 4 to 500K range using built in calibration curves and sensor data Plus non volatile Flash memory is available for several custom or calibrated sensors i y i r Platinum RTD sensors can use built in DIN 43760 IEC 750 standard setups for 1000 OR 10000 devices The Model 9302 amp 9304 uses the DIN standard for temperatures from 70K to 1020K and extends it down to 30K for cryogenic use Operation down to about 14K is available using user supplied
2. curves A unique feature of these monitors is the use of a ratiometric resistance bridge technique to measure Platinum RTD sensors This significantly reduces low frequency noise and drift to provide solid measurements These monitors provide robust support for the Negative Temperature Coefficient NTC sensors commonly used by cryogenic applications They include Ruthenium oxide Cernox Carbon Glass Germanium and several others Since they have a negative temperature coefficient the constant voltage measurement method will reduce rather than increase power dissipation in the sensor as temperature decreases By maintaining the lowest possible power level sensor self heating is minimized and useful temperature range is greatly increased An additional advantage to constant voltage biasing is that NTC resistors lose sensitivity in the upper part of their range By auto ranging excitation current to maintain a constant voltage sensitivity and noise immunity in that range is greatly improved Sensor excitation used in conjunction with the constant voltage feature is a 2 5 Hz bipolar square wave This effectively cancels thermal EMF induced offset errors that sometimes occur in Voltage Min Max cryogenic systems The Bias Resistance Resistance maximum and minimum 10 0mV 100 1 0MQ sensor resistance that can 3 33mV 3 30 430KQ be read is a function of 1 0mV 10 100KQ the selected voltage bias Accuracy Measurement accu
3. 2K 140 owt 4 2K 44ocV 77K 1 2mQ 4 7mQ 30K 0K 1 090 77K 161mQ OCS oe reduancy else 30K 1 2mQ 4 7mQ 600K 300K 450mQ Other sensor types include Platinum Excitation Temperature 300K 8 7m 800K 6 7mK 6 2mK 300K 4 0K 1 9mK 1 4K 2 2mK currents are 1 0MA 100 lt A and 10 ADC Measurement Accuracy TTK 12mK 300K 6 2mK 6 2mK 77K 4 2K 17mK 4 2K 2 2mK ed i 4 2K 1 6mK 77K 2 8mK 2 8mK 30K 20K 275mK TIK 75mK Corresponding full scale resistance ranges are A ae eat 9 8mK cp REN 3120 3 2kQ and 31kQ Measurement Resolution 300K 7 4eV 800K 1 8mQ 600K 15mQ 2 0K 11m 4 2K 46mQ NTC sensors include Ruthenium Oxide and FIK ATI 300K 1 8mQ 300K 15MQ 77K 4 2K 11mQ 77K 1 8mQ me 15 1 8mQ 30K i 0 Cernox Constant voltage AC sensor excitation ge Ue TS ae i 20K 11mQ Se Se 30K 460 2 1 8mQ allows the use of these sensors over an extended temperature 600K 4mK i i st Temperature Resolution 300K 3 0mK 800K 1 8mQ arn 9 0K 300cK 4 2K 4 2K 50K 77K 3 8mK 300K 4 7mK 300K 4mK 77K 0 43mK 77K 0 85mK 5000 0 5mK 4 2K 5000 K 77K 1 1mK 20K 2 9mK 300K 3 5mK 30K 2 4mK 30K 1 0mK Power Dissipation 4 2K 170W 30K 3 7QW 30K 370nW 10K 42nW 1 4K 1 1nW 77K 12ccW 77K 200W 77K 20eW 40K 73nW 4 2K 20nW Magneto resistance Very Large Moderate Moderate lt 2 for H lt 2T lt 1 for H lt 2T 1 10mV Constant Voltage excitation Specificati USER INTERFACE Measurement Resolution Sensor dependent Number Two Dry Normally Open cont
4. INSTRUMENTS Or 04 TEMPERATURE M93 ft INDICATOR Alarm amp Relay 1 rta e nn Relay 2 NI NIN i Il i Mt WT il A iil il i ER OGENIC TEMEKE INDICATORS era VIUUGT VIDOUS VIOUST IVIJOUZ Q Two or four input channels with Ethernet connectivity Scientific Instruments Model 9302 and 9304 are the most flexible and accurate temperature monitors currently available Virtually any cryogenic temperature sensor from any manufacturer can be selected by a single setting of the front panel Additional custom or specially calibrated sensors require only a simple setup procedure In addition to its high accuracy performance and low noise design unique features include Constant Voltage AC sensor excitation Internal Data Logging Ethernet Connectivity a large easy to read display and extensive utility software Ethernet connectivity adds a new dimension of utility to these monitors In both industrial and laboratory applications Ethernet is more reliable and easier to use compared to other communication standards Furthermore it is essential to remote distributed sensor or Local Area Network based systems The Model 9304 has four input channels and Model 9302 has two All channels are identical in function Multipurpose input channels support Silicon Diode GaAs Platinum RTD and Cryogenic NTC resistive temperature sensors Constant Voltage
5. acts Display Type Graphics VFD 10mm character height Nur amp berSxnsor Performance Data Sheet Contact Rating 30VDC at 1A Connector Connection Inputs Displayed Two or Four Digital Resolution 24 bits 6 pin detachable terminal block Keypad Sealed Silicon Rubber Digital Accuracy 0 0015 of full scale REMOTE INTERFACES Temperature Display Six significant digits autoranged DMp syrement Drift lt 15ppm C Ethernet 10 Base T Electrically isolated Update Rate 0 5 Seconds Measurement Filter 0 5 1 2 4 8 16 32 and 64 SecondECP IP user data socket provides remote control and data Display Units K C F or native sensor units Calibration Curves Built in curves for industry standard interface to common data acquisition software by using an Display Resolution User selectable to seven significant dsgitssors plus four user curves with up to 200 entries each ASCII command language INPUT CHANNELS Interpolation is performed using as Cubic Spline HTTP provides built in web server There are two input channels on the Model 9302 and DATA LOGGING SMTP sends e mail based on user selected alarm conditions four on the Model 9304 each may be independently configWata logging is performed to an internal 20K byte circular RS 232 Serial port os an RS 232 standard null modem hata for any of the supported sensor types Sensor Connectiorbuffer and is time stamped with a real time clock Buffer Rates SE 9600 28 2000 and 57 600 Baud Language Se
6. ielded sensor connector kit Dual sensor input 9302 240 Two channel monitor set for 220 to 240VAC connector cable assembly 9304 110 Four channel monitor set for 90 to 120VAC Four channel Detachable 120VAC Line Cord 9304 240 monitor set for 220 to 240VAC Certificate of Calibration 4400 West Tiffany Drive West Palm Beach Florida 33407 Telephone 561 881 8500 Fax 561 881 8556 Visit our website www scientificinstruments com e mail sales scientificinstruments com
7. irectly to the Internet with a user supplied IP address Using Ethernet HTTP protocol the monitor s embedded web Server allows the instrument to be viewed and configured from any web browser Rear Panel Connections Input Connectors Two DB 9 receptacles provide 4 wire measurement connection to two sensors each LAN Standard RJ 45 Ethernet connector with built in connection and activity LEDS RS 232 Null Modem connector DB 9 pins Relays Analog Output 6 pin detachable terminal block 3 5mm AC Power RFI filtered Power Entry Module including AC power line switch and fuse drawer Line voltage selection is performed by Internal jumpers etw i laby Gp Input channels can be configured using text entry and drop down box selections by going to the monitor s Using SMTP protocol the monitor will send e mail based on selected alarm conditions E mail is completely configured by using the web page interface The TCP IP data port server brings fast Ethernet connectivity to all common data acquisition software programs including LabView The TCP IP protocol is used to implement a text based command language like those commonly used with IEEE 488 or RS 232 interfaces This is the primary way that user software interfaces to the monitor The remote command language is SCPI compliant according to the IEEE specification With Ethernet connectivity the user has complete control of the monitor b
8. nsor Selection Front Panel of remote interface Sensoqn al OG OUTPUT LabView Drivers are available for the Ethernet TCP Resolution Sensor Dependent See Sensor Performance Pil amp nalog output is a scaled voltage output that is Data Socket and the RS 232 interface Welty ot roportional to any selected input temperature GENERAL pensoGExeltallone oustan Oc nai SUGU 7 oy ia ut put Range Zero to 4 Volts Ambient Temperature 25 C 5 C for specified accuracy Constant Voltage 10mV 3 3mV and 1 0mV RMS with xa Impedance 500 Ohms Mechanical 8 5 W x 3 5 H x 12 D One half width 2U rack currents from 1 0mA to 10nA in steps of 5 of power Resis gnef Resolution 0 0015 of full scale range Instrument bail standard rack mount kit optional Weight 5 Measurement type Ratiometric bridge Resistance Range nnection Bahaba inalok ne Constant voltage resistance measurement range 10Q to 350KQ AC Power Requirement 110 of 220VAC 5 to 10 50 to AC Excitation Frequency Resistor sensors in constant vB ha OUTPUTS mode 2 5Hz bipolar square wave Each relay output may be programmed to assert upon Sample Rate 10Hz per channel detection of a high or low temperature on any selected inp channel User s Manual Panel Mount hardware Part Number Description 60Hz 30VA AC Power Switch Rear Panel Conformity European CE certified Utility Software CD Null Modem Cable 9302 110 Two channel monitor set for 90 to 120VAC Relay Connector Sh
9. racy is obtained by using a 24 bit analog to digital conversion Accuracy is further enhanced by extensive use of Digital Signal Processing DSP techniques The Model 9302 amp 9304 include built in curves that support most industry standard temperature sensors Additionally four user Calibration curves are available for custom or calibrated sensors Each curve may have up to 200 entries The accuracy of any sensor can be greatly improved by the use of this feature This will fita Diode Platinum RTD or NTC resistor sensor s calibration curve at up to three user specified temperature points It is a built in easy to use method for obtaining higher accuracy temperature measurements without expensive sensor calibrations Lowest Noise These temperature indicators were designed for use in extremely low noise environments that cryogenic systems often require Linear mode power supplies are used throughout and sensor excitation current sources are not multiplexed The enclosure is all Aluminum with wide conductive overlaps on all mating metal surfaces so that radiated RFI noise is virtually eliminated An effective shielding and grounding scheme further allows the user to minimize both conducted and radiated noise Easy to use The Model 9302 amp 9304 front panels consist of a large bright Vacuum Fluorescent display and a 5 key keypad Most features and functions can be accessed via this simple and intuitive menu drives interface Two temperatu
10. re readings can be displayed in a large easy to read 10mm two line font Underlying menus switch to a 5mm high four line font for more content Additionally the Model 9304 can display all four inputs plus alarm and relay status in this smaller font Temperature displays are autoranged to show the most number of significant digits Built in digital filters can be used to smooth temperature data Displays are in units of K C F Volts or Ohms The status of built in alarms and relays are indicated by LEDs located tot he right of the display Outputs The Model 9302 amp 9304 each have two dry contact relay outputs Either may be independently programmed to assert or clear based on a high or low temperature condition Normally open contacts are available on the rear panel Also available is a single analog output channel This is a zero to 4 Volt output that is proportional to any selected input Data logging is performed by continuously recording temperature and status to an internal 20K byte circular memory buffer Data is time stamped so that the actual time of an event can be determined Non volatile memory is used so that data will survive a power failure Ethernet The Model 9302 amp 9304 connects directly to any 10 Based T Ethernet interface to make measurements easily and economically Simple connection to any existing Local Area N distributed data acquisition systems The Model 9302 and 9304 can even be connected d
11. y using any web enabled device from desktop PC to a inputs web page wireless Pocket PC It is platform and operating system independent working equally well with Windows Linux or Macintosh based computers There are no expensive cards or cables and no confusing configuration requirements Software Utility software is provided that connects any Windows based personal computer to either monitor This software provides a graphical control panel that greatly simplifies instrument setup and configuration Sensor calibration curves may be downloaded to the monitor LabView LabView drivers are provided for both the Ethernet mas SaR LMARACES 2 02096 200 ide FR USA Inputs C D RS 232 C nt AB Aout wate Riy 2 um me aus SA 0 120VAC Pa 240VAC amp CE Fuse 3AG 10A Ss x Nn e Sensor Type Silicone Diode 1000 Platinum 10000 Platinum Ruthenium Cernox 1 Silicone Diode sensors use a fixed excitation DIN43760 DIN43760 Oxidet current of 10o lt A 100c lt A and an input voltage Sensor Sensitivity 300K 2 4mV K 77K 800K 0 36Q K 600K 3 7Q K 1 0K 1260Q K 4 2K 1 4K 240KQ K 4 2K FO to 2 5V 1 9mV K 4 2K 300K 0 39Q K 77K 300K 3 9Q K 77K 80 3Q K 20K 2290QIK 77K SERIO Gr 30mVIK 0 420 K 30K 4 20 IK 30K 3 960K 2 150 K 300K Both Negative and Positive Temperature 0 19Q K 1 9Q K 0 16Q K A 7 1 4 TTK 230 2 i 4 2K 5 1Q supported using a ratiometric bridge technique a pe Se ee E 4

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