Cryogenic Temperature Controllers – Model 44c
The cryogenic temperature controllers (model 44C) are designed for use as a general purpose cryogenic instrument with extended operation into the ultra-low (>1K) temperature range. Additionally, it provides an interface to control external equipment including cryocoolers and most refrigerator systems, offering a complete ‘one box’ solution in many applications.
The cryogenic temperature controllers provide four sensor inputs, each of which support wide range of temperature measurements by use of a ratiometric AC resistance bridge. This is extended into general purpose applications by supporting a DC mode for diode type sensors. Three control loop outputs feature power levels as high as 50W and as low as 50 mW in order to support both high and ultra-low temperature operation. All control modes are supported by all outputs.
The 44C front panel incorporates a high resolution 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.
Standard remote interfaces include 100/10 Ethernet and RS-232. IEEE-488(GPIB) and USB are optional.
- Four multipurpose input channels support Diode, Platinum RTD and virtually all cryogenic NTC resistive temperature sensors.
- Operation from below 50mK to over 1020K with an appropriate sensor.
- Large, bright and highly configurable display.
- Step-less Constant-Voltage sensor excitation extends the useful temperature range of resistive temperature sensors.
- Programmable logic interface controls external equipment. This can provide a complete ‘One Box’ solution for many systems.
- Three precision control loops. Loop #1: 50-Watt, four-range. Loop #2: 10-Watt, two-range, Loop #3: 10-Volt
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- Table control mode automatically switches the loop input sensor to allow smooth, continuous control over a wide range of temperature.
- Fail-safe cryostat protection features protect user equipment from damage.
- Unique synchronous filter improves control accuracy and stability in cryocooler based systems.
- Remote interfaces include 100/10 Ethernet and RS-232. IEEE-488.2 (GPIB) and USB are optional.
- Remote command language is IEEE SCPI compliant.
- LabVIEW™ drivers are available for all interfaces.
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Cryogenic Temperature Controllers – Model 24C
The Model 24C Cryogenic Temperature Controllers provide a four-input, four control loop cryogenic temperature controllers designed for general purpose laboratory and industrial use. Each input is independent and capable of temperature measurement to <300mK with an appropriate temperature sensor.
The Four-output control loop circuits feature a primary 50W heater, a secondary heater of 10W and two 10-Volt non-powered outputs. All control modes are supported by all outputs.
The 24C front panel incorporates a high resolution 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. Standard remote interfaces include 100/10 Ethernet and RS-232. IEEE-488(GPIB) and USB are optional.
- Four multipurpose input channels support Diode, Platinum RTD and most cryogenic NTC resistive temperature sensors. Thermocouple inputs are optional.
- Operation from 200mK to over 1500K with an appropriate sensor. Constant-Voltage, AC excitation of resistive sensors minimizes errors and extends their useful temperature range.
- Four control loops: Loop #1: 50-Watt, three range. Loop #2: 25-Watt two range, Loops #3 and #4: non-powered.
- Large, bright and highly configurable display.
- Synchronous input filter improves control accuracy and stability in cryocooler based systems.
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- Two dry-contact 10A relay outputs.
- Data logging to internal Non-Volatile memory.
- Fail-safe cryostat protection features protect user equipment from damage.
- Table mode control automatically switches the loop input sensor to allow smooth, continuous control over a wide range of temperature.
- Remote interfaces include 100/10 Ethernet and RS-232. IEEE-488.2 (GPIB) and USB are optional.
- Protect your system software: Remote command language is IEEE-488.2 SCPI compliant.
- National Instruments, Inc. LabVIEW™ drivers are available for all interfaces.
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The cryogenic temperature controllers (model 44C) are designed for use as a general purpose cryogenic instrument with extended operation into the ultra-low (>1K) temperature range. Additionally, it provides an interface to control external equipment including cryocoolers and most refrigerator systems, offering a complete ‘one box’ solution in many applications.
