NRLM TYPE BLACK BODY FURNACES For High Temperature Model IR-R27 For Medium Temperature Model IR-R26 For Low Temperature Model IR-R24 The NRLM black body furnaces have been developed as large opening black body furnaces for calibration as a result of the joint research with the National Research Laboratory of Metrology, Japan (NRLM), based on the latest radiation thermometer traceability systems. The reference black body furnaces are prepared for high temperature range (800-1450 ) and medium temperature range (200-1050 ), while the standard black body furnace is prepared for low temperature range (50-450 ). The black body furnace for high temperature is used for comparison calibration by using a fixed-point-calibration by using a fixed-point calibrated 0.90 or 0.65 m silicon monochromatic radiation thermometer as the standard thermometer. The black body furnace for medium temperature range is used for comparison calibration by utilizing a fixed-point calibrated 0.90 m silicon monochromatic radiation thermometer as the standard thermometer, and the black body furnace for low temperature is used for calibration by utilizing a optional built-in platinum resistance thermometer as the standard thermometer. The cavity is profiled as a double cone having a curve mirror surface reflection effect, and a high calibration accuracy has been realized with a large opening by uniquely designing the furnace body structure and heaters. Also, these black body furnaces have been designed to be compact and lightweight with low power consumption by taking their operation ease and economy into due consideration. FEATURES High Cavity Emissivity with a Large Opening The opening diameters are 30mm for high temperature, 50mm for medium temperature, and 60mm for low temperature. The cavity emissivity is evaluated as 0.99, 0.997, 0.993, so that the scales can be calibrated easily with high accuracy. Excellent Furnace Temperature Stability The black body furnace for high temperature is stabilized within 0.5K, the black body furnace for medium temperature is stabilized within 0.25K, and the black body furnace for low temperature is stabilized within 0.15K respectively, in about 20 minutes after reached at each preset temperature. lightweight to 1/10 as compared with those of conventional CHINO's products, and they can easily be mounted and operated. Low Power Consumption and Economical The black body furnaces for low and medium temperature can be operated with a 100V AC commercial power source, while the black body furnace for high temperature is operated with 200V AC. The maximum power consumption is 1200VA (for medium temperature) and 500VA (for low temperature) which are 1/10 as compared with those of conventional CHINO's products. Also, the maximum power consumption is 2500VA (for high temperature). Compact, Lightweight, and Easy-to-operate These black body furnaces are compact and

NRLM TYPE BLACK BODY FURNACES STRUCTURE Control thermometer Furnace core tube Furnace core The furnace core is made of a metal having excellent thermal conduction, and a double conic cavity is formed inside. The heaters are embedded along the outer circumference to enhance the thermal efficiency, and arranged to improve the temperature distribution in the cavity. The furnace temperature is controlled by the pulse type PID system using SSR, and the furnace body and the control system are encased into the same case. CALIBRATION EXAMPLE Model IR-R24 Standard platinum resistance thermometer (option)...

Black Body Furnace for Medium Temperature Range Model IR-R26 WORKING TEMPERATURE RANGE: 200 to 1050 MAXIMUM WORKING TEMPERATURE: 1100 MAXIMUM HEATHING TIME: about 4 hours CAVITY PROFILE: Double cone type VERTICAL ANGLE OF THE CAVITY BOTTOM : 120 OPENING DIAMETR OF CAVITY: 50mm OPENING RATIO ( l /d ):6 CAVITY MATERIAL: Inconel CAVITY EMISSIVITY: 0.997 TEMPERATURE STABILITY: 0.25K/30min HEATER MATERIAL: Kantal A-1 CONTROLTHERMETER: R thermocouple TEMPERATURE ONTROL SYSTEM: SSR Drive pulse type PID system POWER CONTROL DEVICE: SSR POWER SUPPLY: 100V AC 1 (Contact CHINO for others) MAXIMUM POWER...

PERFORMANCE SPECIFICATION_ ■EXTERNAL DIMENSIONS Opening Diameter <j, 30 Distance to Cavity Bottom 220 Specifications subject to change without notice. Printed in Japan (I) 2010. 5 CHINO CORPORATION E-mail : [email protected] Website : http://www.chino.co.jp/