Cryogenic Temperature Controllers 22C- Brochure

Cryogenic Temperature ControllerModel 22CLOT-QuantumDesign Europe. For your local contact click at: www.lot-qd.comE-mail: magnetometry@lot-qd.comThe Model 22C is a two-input, four-control loop cryogenic temperature controller designed for general purpose laboratory and industrial use. Each input is in-dependent and capable of temperature measurement to <200mK with an appropriate temperature sensor. The Model 22C supports virtually any cryogenic tempera-ture sensor produced by any manufacturer.The four-output control loop circuits feature a primary 50W heater, a secondary heater of 25W and two non-powered outputs.The 22C front panel incorporates a large high resolu-tion graphics TFT type Liquid Crystal Display with an exceptionally wide viewing angle. With it‘s bright white LED backlight, complete instrument status can be seen at a glance, even from across the room.Major highlightsnn Two multipurpose input channels support Diode, Platinum RTD and most cryogenic NTC resistive tem-perature sensors. Thermocouple inputs are optional.nn Operation from 200mK to over 1500K with an ap-propriate sensor. Constant-Voltage, AC excitation of resistive sensors minimizes errors and extends their useful temperature range.nn Four independent control loops: Loop #1: 50-Watt, three-range; Loop #2: 25-Watt two-range; Loop #3 and #4: 10-Volt two-range.nn Large, bright and highly configurable display.nn Synchronous input filter improves control accuracy and stability in cryocooler based systems.nn Two large 10-Ampere dry-contact relays.nn Data logging to internal Non-Volatile memory.nn Table mode control automatically switches the loop input sensor to allow smooth, continuous control over a wide range of temperature.nn Remote interfaces include Ethernet, IEEE-488.2 (GPIB) and USB 2.0. LabViewTM drivers available for all interfaces.Flexible InputsThe Model 22C has two identical input channels each of which implements a ratiometric AC resistance bridge.This resistance bridge is used in a constant-voltage AC mode to provide robust support for Negative Tempera-ture Coefficient (NTC) sensors including Ruthenium-oxide, Carbon-Glass, Cernox™, Carbon-Ceramic, Germanium and several others. Since they have a negative temperature coefficient, the use of a constant-voltage measurement will reduce 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 of constant-voltage excitation 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 also improved.Positive Temperature Coefficient (PTC) resistor sensors including Platinum, CLTS and Rhodium-Iron RTDs use the resistance bridge in a constant-current, AC or DC excitation mode. Platinum RTD sensors use a built-in DIN standard calibration curve that has been extended to 14K for cryogenic use. Lower temperature use is possible with custom calibrations. Model 22C supported sensorsTemperature range Example sensorsSilicon Diode 1.4 - 500KCryo-con S900 SI-440, 430, 410 Lakeshore DT-670, 470Platinum RTD 14 - 1200KCryo-con CP-100 Cryo-con GP-100 Cryo-con XP-100 Cryo-con XP-1KRhodium-Iron 1.4 - 800K Oxford PHZ 0002Germanium Thermistor 200mK - 400K AdSemCLTS 4 to 300K Vishay CLTS-2BSilicon Thermistor 0.5 - 720K AdSem, Inc. CernoxTM 200mK- 325K Lakeshore, all typesCarbon-Ceramic 200mK- 300K TMi-A1Ruthenium Oxide 200mK - 270K SI RO-600, SI RO-105Thermistor 193 - 523K Measurement specialtiesThermocouple 1.4 to 1500K All thermocouple typesCryogenic Temperature ControllerModel 22CLOT-QuantumDesign Europe. For your local contact click at: www.lot-qd.comE-mail: magnetometry@lot-qd.comInput specifications Diode sensors PTC resistor sensors NTC resistor sensors constantcurrentNTC resistor sensors constant voltage ThermocouplesInput configurationConstant current, DC Constant current, AC/DCConstant current DC resistance bridgeAutoranging constant voltage AC resistance bridge DC voltageInput range 0.1V – 2.25V1.0mA: 0.1 – 500W 100µA: 1.0 – 5.0KW CLTS: 300W100K – 225KW Minimum: 0.5W Maximum: 100KW ±70mVAccuracy:% Rdg ± % range0.005% ±80µVPTC100: 0.01% ±0.004W PTC1K: 0.02% ±0.04W±1.0KW @ 100KW 14 W to 30KW: 0.05% +0.04% 0.5 W to 100KW: 0.15% +0.15% 0.05%Resolution: % range 10µV 0.0003% 0.004% 0.0003% 0.0003%Excitation 10µA DC 1.0mA, 100µA 10µA, DC10mV, 2.5mA to 100nA continuously variable active DC offset cancellationN/ASilicon diode sensors are supported over their full tem-perature range by using the bridge in a DC, constant-current mode.Thermocouple sensors are supported by using an optional thermocouple module. This module plugs into any of the Model 22C‘s input channels. It is powered by the instrument to provide amplification, cold-junction compensation and connection to copper. Up to four modules can be connected to a single instrument.The Model 22C includes built-in sensor calibration curves that support most industry standard temperature sensors. Additionally, eight user calibration curves are available for custom or calibrated sensors. Each user curve may have up to 200 entries.For all sensor types, conversion of a sensor reading into temperature is performed by using a Cubic spline interpolation algorithm. In addition to providing higher accuracy than conventional linear interpolation, the spline function eliminates discontinuities during tem-perature ramps or sweeps by ensuring that the first and second derivatives are continuous.New calibration curves may be generated using the CalGen® feature. This provides an easy and effective method for obtaining higher accuracy temperature measurements without expensive sensor calibrations.Input Channel Statistics: The Model 22C continuously tracks temperature history independently on each input channel and provides a statistical summary that indi-cates the channel‘s minimum, maximum, average and standard deviation. Also shown are the slope and the offset of the best-fit straight line of temperature history data.Data logging is performed by continuously recording input temperature data to an internal 1,365 entry buf-fer. Data is time stamped. Non-volatile memory is used so that data will survive a power failure.Four control loopsThe Loop #1 heater output is a linear, low noise RFI fil-tered current source that can provide up to 1.0 Ampere into 50O or 25O resistive loads. Three full-scale ranges are available in decade increments down to 500mW.Loop #2 is a two-range linear heater with that will provide 25 or 2.5-Watts into a 50O load.Loop #3 and #4 are non-powered analog voltage outputs designed to control an external booster power supply. Output is zero to 10-Volts or zero to 5.0-Volts by user selection. The controller‘s relays may be used to turn the external supply on and off.All control loops are completely independent and any loop may be controlled by any sensor input. Control modes are Manual, PID, Ramp, PID Table and Ramp Table. The field proven Autotune function of the Model 22C involves the use of a specific output waveform to first develop a process model, then generate the opti-mum P, I and D coefficients.PID tables are available that can be used to store op-timum control parameters vs. point temperature. Each entry of a PID table contains a setpoint, a control input, PID values and a heater output range setting. When the point is changed, the controller will automatically generate new PID values, a controlling input chan-nel and heater range. The Model 22C will perform a temperature ramp function using a specified maximum ramp rate and target setpoint.Cryogenic Temperature ControllerModel 22CLOT-QuantumDesign Europe. For your local contact click at: www.lot-qd.comE-mail: magnetometry@lot-qd.comSpecificationUser interfaceDisplay type 240x64 graphics TFT LCD with LED back-lightNumber of inputs displayedTwoKeypad Sealed silicon rubberTemperature display Six significant digits, auto-rangedDisplay update rate 0.5 secondsDisplay units K, C, F or native sensor unitsDisplay resolution User selectable to seven significant digitsInput channelsThere are two input channels, each of which may be independently configured for any of the supported sensor types.Sensor connection 4-wire differential, DIN-6 connectorThermocouple connectionExternal option, field installable.Sensor types See supported sensor tableSensor selection Front panel or remote interfaceInput configurations See input specifications tableBridge modes Passive, Constant-Current or Constant-Voltage.Bridge type Ratiometric resistance bridge; Two ADCs per input channelAC excitation frequency 7.5Hz bipolar square wave.Voltage excitation 10mV and 1.0mV. Minimum excitation current is 10nA, maximum is 2.5mA.DC offset <8nA by active cancellationSample rate 15Hz per channelDigital resolution 24 bitsMeasurement accuracy See input specifications tableMeasurement drift 15ppm/°C, <10O or >10kO 30ppm/°CIsolation Input channel circuits are electrically isolated from all other internal circuitry but not from each otherMeasurement filter 0.5, 1, 2, 4, 8, 16, 32 and 64 seconds.Calibration curves Built-in curves for industry standard sensors plus eight 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.Data loggingData logging is performed to an internal 1,365 entry circular buffer and is time-stamped with a real-time clock. Buffer memory is non-volatile and will retain valid data without ac power. All four input channel temperatures are recorded.User setupsFour user setups are available that save and restore the complete configuration of the instrument.Control outputsNumber of independent control loopsFourControl input Any sensor inputLoop update rate 15Hz per loopControl type PID table, Enhanced PID, ramp, ramp on table or manualAutotune Minimum bandwidth PID loop designPID tables Six user PID tables available for storage of setpoint and heater range vs. PID and heater range, 16 entries/tableSet-point accuracy Six+ significant digitsFault monitors Control loops are disconnected upon detection of a control sensor fault or excessive internal temperatureOver temperature disconnectHeater may be relay disconnected from user equipment when a specified temperature is exceeded on any selected input.Loop #1 primary heater outputShort circuit protected linear current source. Compliance is 50VRanges Three output ranges of 1.0A, 333mA and 100mA full-scale, correspond to 50W, 5.0W and 0.5W into a 50O load.Load resistance Selectable at 25O or 50O.Resolution 1.0ppm of full-scale power (20 bits)Readbacks Heater output power, Heatsink temperature.Connection Dual banana plugLoop #2 heater output Short circuit protected linear current source. Ranges Two output ranges of 710mA and 224mA full-scale, which correspond to 25W and 2.5W into a 50O load.Load Resistance 50O for maximum outputResolution 1.0ppm of full-scale power (20 bits)Readbacks Heater output power, Heatsink temperature.Connection Detachable terminal block.Cryogenic Temperature ControllerModel 22CLOT-QuantumDesign Europe. For your local contact click at: www.lot-qd.comE-mail: magnetometry@lot-qd.comLoop #3 and #4 control outputsAnalog voltage outputs that are intended to drive an external booster supply.Output Zero to 10 / 5.0-Volts. Output impedance: ~2,000W.Resolution 1.0ppm of full-scale power (20 bits).Connection Detachable terminal block.Relays Two dry-contact relays. N.O. contacts available. Ratings are 125VAC @ 10A. Maximum switching power: 150WStatus reported via remote interfaceSensor fault, Heater over temperature faultStatus OutputsAudible and Visual Alarms Independent audible remote and visual alarms.Relays Two dry-contact relays. N.O. contacts available. Ratings are 125VAC @ 10A. Maximum switching power: 150W.Status reported via Remote InterfaceSensor fault, Heater over temperature fault.Remote InterfacesMaximum reading rate for all interfaces is >40 rdg/s.Ethernet Connects to any ethernet local area network, electrically Isolated. TCP/IP and udp servers provide remote control by Using an ASCII command language. HTTP provides built-in web server. SMTP sends e-mail based on alarm conditions.USB 2.0 Serial port emulator, data rates to 115,200 baudIEEE-488.2 (GPIB) Full IEEE-488.2 compliantProgramming language IEEE-488.2 SCPI compatible.LabVIEWTM Drivers available for all interfaces.FirmwareInstrument firmware can be updated in the field via the ethernet onnection. Firmware updates are available via the internet free of charge.GeneralAmbient temperature 25°C ±5°C for specified accuracyMechanical 21,3 cm x 8,8 cm x 30 cm (WxHxD) One half-width 2U rack.Instrument bail standard, rack mount kit optional.Weight 4 KgPower requirement 90 – 240VAC, 50-60Hz, 150VAConformity European CE certifiedCalibration NIST traceableOrdering information Model 22C Controller with two multi-function sensor input channels and four control loops. Controller includes: User’s Manual, Cryo-con software CD, two input connectors, heater connector, terminal block plug, detachable power cord and a certificate of calibration.Specify AC Line Voltage or required power cord when ordering (may be changed in the field):- 100 Configured for 90 - 100VAC with detachable USA power cord.- 120 Configured for 110 - 120VAC with detachable USA power cord.- 230 Configured for 220 - 230VAC with detachable universal Euro (Shuko) line cord.- 240 Configured for 240VAC with detachable universal Euro (Shuko) line cord.Ordering information options4039-004 Thermocouple Input Module. Field installable. Supports all thermocouple types. Ordering information accessories4026-016 Input connector kit consisting of four 6-pin circular sensor input connectors.4026-018 Output connector kit consisting of a 3-pin terminal block receptacle and a 10-pin terminal block receptacle.4122-030 Single instrument 2U rack mount kit.4034-031 Two instrument shelf rack mount kit4034-032 One instrument shelf rack mount kit