NRLM TYPE BLACK BODY FURNACESFor High Temperature●Model IR-R27
For Medium Temperature●Model IR-R26
For Low Temperature●Model IR-R24

The black body furnace for medium temperature range isused for comparison calibration by utilizing a fixed-pointcalibrated 0.90μm 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 resistancethermometer as the standard thermometer.

The NRLM black body furnaces have been developed aslarge opening black body furnaces for calibration as aresult of the joint research with the National ResearchLaboratory of Metrology, Japan (NRLM), based on thelatest radiation thermometer traceability systems. The
reference black body furnaces are prepared for hightemperature range (800-1450℃) and medium
temperature range (200-1050℃), while the standard
black body furnace is prepared for low temperature range(50-450℃).

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 byuniquely designing the furnace body structure andheaters.
Also, these black body furnaces have been designed tobe compact and lightweight with low power consumption
by taking their operation ease and economy into due
consideration.

The black body furnace for high temperature is used forcomparison calibration by using a fixed-point-calibrationby using a fixed-point calibrated 0.90 or 0.65μm siliconmonochromatic radiation thermometer as the standard
thermometer.

■FEATURES●High Cavity Emissivity with a Large Opening
The opening diameters are 30mm for high temperature,
50mm for medium temperature, and 60mm for lowtemperature. The cavity emissivity is evaluated as 0.99,0.997, 0.993, so that the scales can be calibrated easily
with high accuracy.

lightweight to 1/10 as compared with those of
conventional CHINO's products, and they can easily bemounted 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 mediumtemperature) and 500VA (for low temperature) whichare 1/10 as compared with those of conventional
CHINO's products.
Also, the maximum power consumption is 2500VA (forhigh temperature).

●Excellent Furnace Temperature Stability
The black body furnace for high temperature isstabilized within ±0.5K, the black body furnace formedium temperature is stabilized within ±0.25K, andthe black body furnace for low temperature is stabilized
within ±0.15K respectively, in about 20 minutes after
reached at each preset temperature.
●Compact, Lightweight, and Easy-to-operate
These black body furnaces are compact and1PSE-608

NRLM TYPE BLACK BODY FURNACES■STRUCTURE
Control thermometer

Furnace core tube

Furnace core210

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 toenhance the thermal efficiency, and arranged to improve thetemperature 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.

425Unit:mm■CALIBRATION EXAMPLE●Model IR-R24●Model IR-R26 & IR-R27
Radiation thermometerto be calibrated

Standard platinum
resistance thermometer(option)

0.90m or 0.65m Si
monochromaticradiation thermometer■SPECIFICATIONS●Black Body Furnace for High Temperature Range
Model IR-R27
TEMPERATURE CONTROL SYSTEM:
Current type PID system
POWER CONTROL DEVICE:
Thyristor Regulator
POWER SUPPLY:
200V AC 1φ (contact CHINO forothers)
MAXIMUM POWER CONSUMPTION:
About 2500VAGROSS WEIGHT:
About 36kg
CABINET SURFACE TEMPERATURE:Lower than 55℃ by air coolingSAFETY MEASURES: Earth linkage, with breaker
EXTERNAL DIMENSIONS:
280W x 425H x 550D (mm)WORKING TEMPERATURE RANGE:
800 to 1450℃
MAXIMUM WORKING TEMPERATURE:1500℃
MAXIMUM HEATING TEMPERATURE:
About 2 hours
CAVITY PROFILE:
Cylindrical cone type
VERTICAL ANGLE OF THE CAVITY BOTTOM:120℃
OPENING DIAMETER OF CAVITY:
30mm
CAVITY MATERIAL:
Silicon carbide
CAVITY EMISSIVITY: 0.99
TEMPERATURE STABILITY:±0.5K/30min
HEATER MATERIAL:
Silicon carbide
CONTROL THERMOMETER:
0.9μm Si monochromatic radiation
thermometer2●Black Body Furnace for Medium Temperature Range
Model IR-R26●Black Body Furnace for Low Temperature Range
Model IR-R24

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 1φ (Contact CHINO forothers)
MAXIMUM POWER CONS UMPTION:
About 1200VAGROSS WEIGHT:
About 32kg
CABINET SURFACE TEMPERATURE:
Lower then 45°by air cooling
SAFETY MEASURES: Earth linkage with breaker
EXTERNAL DIMENSIONS:
280w x 425H x 550D (mm)WORKING TEMPERATURE RANGE:
50 to 450℃
MAXIMUN WORKING TEMPERRATURE:
500℃
MAXIMUM HEATING TIME:
About 2.0 hours
CACITY PROFILE:
Double cone type
VERTICAL ANGLE OF THE CAVITY BOTTOM:120°
OPENING DIAMETER OF CAVITY:60mmOPENING RATIO ( l /d): 5
CAVUTY MATERIAL:
Internal wall is treated with Cu
CAVITY EMISSIVITY: 0.993
TEMPERATURE STABILITY:±0.15k/30min
HEATER MATERIAL:
Kantal A-1
CONTROL THERMOMETER:
Pt resistance thermometer
TEMPERATURE CONTROL SYSTEM:SSR Drive pulse type PID system
POWER CONTROL DEVICE:
SSR
POWER SUPPLY:
100V AC 1φ (Contact CHINO forothers)
MAXIMUM POWER CONSUMPTION:
About 500VAGROSS WEIGHT:
About 30kg
CABINET SURFACE TEMPERATURE:
Lower than 45°by air cooling
SAFETY MEASURES: Earth linkage
EXTERNAL DIMENSIONS:
280w x 425H x 550D (mm)●Options For IR-R24
STANDARD PLATINUM RESISTANCE THERMOMETERFOR MEASURING CAVITY STANDARD TEMPERATURE:
MODEL: NRHS1-0
φ3.2mm x500mm, JIS CLASS AFIXED POINT CALIBRATION (CHINO STARNDARD) FOR
NRHS1-0:
MODEL: F-1C
PRECISION THERMOMETER:MODEL: CAB-F2013

■EXTERNAL DIMENSIONS●Model IR-R27

Distance to Cavity Bottom 220

425

Opening Diameterφ30290

HEATER ON

LT-470PVSVMODEDOWNUPSEL ENT550280●Model IR-R26●Model IR-R24

Opening Diameter:
IR-R24:φ60
IR-R26:φ50290

425

Distance to Cavity Bottom 345

LT-470PVSV

MODE

DOWN

UPSEL ENT

280550

Unit:mm

Specifications subject to change without notice. Printed in Japan（I）2010. 5

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Telephone : +81-3-3956-2171
Facsimile : +81-3-3956-0915
E-mail : inter@chino.co.jp
Website : http://www.chino.co.jp/"