Overview:

The SBIR Infinity EXLT Series Extended Area Low-Temperature Blackbody Source is designed for applications where temperatures below the 0°C limit of standard blackbodies must be generated. This blackbody system can achieve temperatures as low as -40°C in an uncontrolled lab environment. For applications such as low-background flood mode testing of detectors, the Model EXLT can eliminate the need for expensive and cumbersome temperature chambers or other special provisions to achieve these cold backgrounds.

A recirculating refrigerated bath cools the blackbody to approximately the desired temperature using a proprietary fluid. Then a sophisticated electronic control system and an array of thermoelectric coolers control the blackbody surface precisely at the desired setpoint. The EXLT Series includes all of the components needed for operation: blackbody, refrigerated bath, temperature controller, cables, and hoses. Operation of the system is straightforward, and maintenance is minimal.

The EXLT is a low cost, easy-to-use solution for applications requiring a low temperature blackbody source.

Features:

• Extended Temperature Range
  
  The EXLT Series has a standard temperature range of -40ºC to +100ºC. An optional range of -40ºC to +175ºC.

• Absolute Temperature Control
  
  The absolute temperature of the blackbody may be set directly, or the blackbody temperature may be set relative to the temperature of an optional external iProbe sensor.

• Dry Gas Purge
  
  When a blackbody is operated below the dew point, condensation can be a problem. To address this issue, the front plate of the blackbody includes a mounting feature so that the volume between the blackbody and the Unit Under Test can be enclosed with a customer supplied shroud and purged with dry gas. Alternately, instead of a shroud, the mounting feature can be used to install an IR window in front of the exit aperture of the blackbody. A gas fitting on the rear plate of the blackbody is provided as a convenient way to route the dry gas into the sealed system.

• Intelli-Probe (iProbe)
  
  The iProbe is an intelligent temperature sensor that is calibrated independently of the blackbody system. To re-calibrate the system you need only exchange the probe with a recently calibrated one. No special equipment is required thus minimizing downtime.

• Accuracy
  
  Ultra-stable, highly responsive iProbes are used to provide very precise control, long term accuracy, and accurate repeatability. The iProbes are calibrated to an accuracy of under 0.010ºC. System uncertainty including calibration and stability is +/- 0.01ºC or +/- 0.1% of set delta T whichever is greater.

• Uniformity
  
  The Infinity blackbody incorporates design and construction features that maximize spatial uniformity and minimize convection influences resulting in typical surface uniformity of > 98% of set absolute temperature less ambient temperature over 90% of the emitting surface area.

• Emissivity
  
  A surface treatment is used to create a spectrally flat emissivity of greater than .970 for 2µ to 14µ.

• Milli-Kelvin Temperature Stability
  
  SBIR has developed unique temperature measurement and analog-to-digital conversion circuitry with integrated control logic that results in extremely responsive temperature control. True set point and accurate milli-kelvin control have been achieved allowing for precision testing at contrast levels of 1 milli-kelvin.

• Multi-Function Controller
  
  The controller features a touch screen display and supports remote computer control over Ethernet or RS-232. The controllers are also available with an optional IEEE 488 Interface.
  
  The controller will also operate all of the SBIR peripherals: target wheels, visible illuminators, pulsed laser diodes, range slides, source slides and filter wheels.
  

• Automatic Radiometric Compensation
  
  Attenuation caused by optics, differences in emissivity, ambient temperature change, and waveband of interest result in system output that is not radiometrically correct. When operating the controller in the radiometric mode, compensation for these factors is automatically applied, adjusting the blackbody as required to maintain the proper system output.  

• IRWindows™ Advanced EO Test and Analysis Tool
  
  The Infinity Series is also optimized for seamless integration with the SBIR IRWindows™ test system. IRWindows™ is an advanced software tool that automates the setup, execution, data collection and results analysis for industry standard performance testing of infrared, visible and laser sensor systems.

Options:

• IEEE Std. 488 Interface (GPIB)
  The thorough implementation of the ANSI/IEEE Std. 488.1-1987 allows for computer control of all blackbody, calibration, illuminator, and target wheel functions.
  
  
• Radiometric Temperature
  Temperature errors due to optical attenuation or emissivity differences can be corrected with this feature.
  
  
• Rack Mounting
  The blackbody controller is designed for bench-top or standard 19 inch rack use. Rack mounting ears come standard with the instrument. A rack slide kit is also available.

Dimensions:

See PDF outline drawings:

4" Infinity EXLT Blackbody PDF
8" Infinity EXLT Blackbody PDF
Infinity Controller PDF

Specifications:

Available Sizes	4”& 8”
Standard Temperature Range C	-40ºC to +100 Absolute
Optional Range D	-40ºC to +175 Absolute
Emissivity	0.970, 2 µ to 14 µ
Uniformity	>98% of Tset – Tambient or 0.01ºC, over 90% of the emitting surface area
Absolute Accuracy	±0.007ºC for 0ºC<T<50ºC or ±0.0005 (T-25) elsewhere
Stability	σT≤0.001ºC (0ºC to 50ºC), σT≤0.002ºC (-40ºC to 0ºC and 50ºC to 100ºC), σT≤0.003ºC (110ºC to 175ºC)
Display Resolution	0.001ºC or 0.0001ºC
Setpoint Resolution	0.001ºC
Ready Indicator Selectable	±0.001ºC to ±5.000ºC
SLEW RATE1
Approximate Heating Rate	+0.40ºC/sec. at 25ºC
Approximate Cooling Rate	-0.20ºC/sec. at 25ºC
Settling Time	45-120 seconds
ENVIRONMENTAL
Operating Temperature	0˚C to 50˚C
Storage Temperature	-20˚C to 70˚C
Relative Humidity	5% to 95%, non-condensing
Power Requirements	100-120/220-240 VAC at 60/50Hz
Maximum Power Consumption	850W-1600W depending on size and temperature range
Approximate Blackbody Weight	EXLT-04—25.0 lbs., EXLT-08—65 lbs.
Approximate Controller Weight	15.0 lbs.
Notes: Slew rates vary depending on blackbody size and environmental conditions * Specifications subject to change without prior notice

PDF Application Drawings

PDF Data Sheet:

See PDF Datasheet

Order Information:

SBIR classifies model numbers based on six different features that a customer can choose from. They are blackbody model number, blackbody size, temperature range, input voltage, cable length, communications interface option and configuration option. For example, a 4" EXLT Infinity model with IEEE 488 GPIB communication interface, 115/60Hz with US power cable, temperature range of -40˚C to +100˚C, cable length of 10 feet and no configuration option has the following part number:
EXLT-04-C-L-10-EG-X

Differential Blackbody: EXLT

Differential Blackbody Size: 04", 08"

Temperature Range:

• C = -40ºC to 100ºC Absolute
• D= -40ºC to 175ºC Absolute

Power Cable:

• H- Europe (Germany, Netherlands, France, Sweden)
• I- Australia & China
• J- UK & Ireland
• K- Italy
• L- US & Japan

Cable Length: 10 ft., 25 ft., 50 ft.

Interface Options:

• ES- Ethernet and RS-232
• EG- Ethernet and IEEE-488 GPIB

Configuration Options:

• R- Radiometric Compensation
• X- No Option Selected

Please contact the SBIR sales team at (805) 965-3669 to ensure the proper part number and to receive a quotation.
Information subject to change without notice