NRLM Type Blackbody Furnace IR-R24/26/270 pages

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

PSE-608