Calibration Source M310-HT

Portable, compact low temperature blackbody calibration source with a large surface area.
Ambient +5 ... 450 °C (+9 ... 842 °F)

Calibration Source M310-HT

Key Features

  • Excellent general purpose calibration
  • High emissivity 1.00 effective @ 8 ... 14 µm
  • Highly uniform
  • Large aperture (3” diameter)
  • High accuracy, high resolution
  • Excellent stability ± 0.3 °C per 8 hour period
  • Manufactured and tested to meet rigid quality control standards
  • Furnished with certificate of calibration traceable to NIST
  • RS232 serial communication included


The M310-HT is a portable blackbody calibration source utilizing a digital indicating temperature controller that may be set to any temperature between ambient +5 °C to 450 °C (+9 to 842 °F). A precision RTD temperature sensor is embedded in the blackbody emitter, providing high accuracy and repeatability.

The temperature controller uses the industry standard PID algorithms to control the emitter temperature to within 0.3 °C of the set points. The blackbody emitter mechanism uses a resistive heating device that provides long life, short stabilization times, and stable temperature control.

Temperature set points are changed by pressing the up or down arrow buttons on the controller. The lower display is the set point and the upper display is the actual blackbody emitter temperature.

Typical Calibration Applications

  • Infrared Temperature Sensors
  • Infrared Thermal Imaging Systems
  • Spectrographic Analyzers
  • Radiometers
  • Flux Meters


Technical Specifications

Measurement Specifications
Temperature Range Ambient + 5 ... 450 °C (+ 9 ... 842 °F)
Temperature Uncertainty1 0.25% of reading ± 1 °C
Display Accuracy vs. NIST Calibration See supplied NIST calibration report
Temperature Resolution 0.1 °C
Stability2 0.3 °C per 8 hour period
Source Non-Uniformity Approximately ± 1 °C @ 250 °C or ± 2 °C @ 400 °C
Heated Emitter Shape Flat Plate
Exit Port Diameter 76 mm (3.00 in)
Emissivity 1.00 effective emissivity at 8 ... 14 μm
Standard Calibration Method Radiometric at 8 ... 14 μm
Temperature Sensor Precision platinum RTD
Warm-up Time < 30 minutes ambient to 400 °C
Slew Rate to 1 °C Stability Approximately 6 min for a + 50 °C change
Slew Rate to 0.1 °C Stability Approximately 10 min for a + 50 °C change
Communication / Interface
Remote Set Point Via RS232
Method of Control Digital PID Controller
Environmental Specifications
Operating Ambient Temperature 0 ... 44 °C (30 ... 110 °F)
Cooling Fan cooled, air inlet on rear panel
Operating Humidity 90% RH max, non-condensing
Dimensions (H x W x D) 207.3 mm x 280.4 mm x 266 mm
(8.2” x 11” x 10.5”)
Weight 5.6 kg (12.4 lbs)
CE Certified Yes
Power Requirements 115 V AC ± 10% 50 & 60 Hz 920 VA fused max, 600 W heater (230 V AC Optional)

1 Accuracy calibration performed radiometrically, the uncertainty of emissivity and transfer standard are already included.
2 Provided stable AC mains voltage and minimum air flow across the exit port or emitter plate.

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