This document discusses blackbody calibrators and their use in calibrating temperature measurement devices like thermal cameras. It describes the principles of blackbody radiation and how different types of blackbody calibrators like cavity, extended area, and differential blackbodies work. It provides details on specific calibrator models and customizable options that include temperature ranges from 10°C to 3000°C, stability levels, aperture sizes, and the ability to integrate targets and choppers.

1. TEMPERATURE BLACK BODY CALIBRATOR

2. BLACK BODY THEORY

3. THE ELECTROMAGNETIC SPECTRUM

4. BLACKBODY
• A black body is a body that always absorbs
all EM radiation completely falling on it
irrespective of its frequency and angle.
• There is no real existence of black body. A
good approximation is a small hole in the
wall of a large insulated hollow enclosure.
• The incident energy goes inside through
this hole and gets reflected again and again
against the inner wall of that black body,
not able to escape. The hole acts as a
perfect absorber.
• The nature of the radiation leaving the
cavity through the hole depends only on the
temperature of the cavity.

5. Wien’s Displacement Law

6. Stefan-Boltzmann Law
Visualization of Stefan–Boltzmann law

7. Planck’s Law

8. Emissivity
The emissivity of an object is the ratio of the energy radiated to that which the object
would emit if it were a Black Body. Hence emissivity is expressed
Emissivity = Radiation emitted by an object at temperature T
Radiation emitted by a Black Body at temperature T
Emissivity is therefore an expression of an object’s ability to radiate Infrared energy.
The value of emissivity tends to vary from one material to another. With metals a rough or
oxidized surface usually has a higher emissivity than a polished surface. Here are some
examples:

9. Blackbody Variables

10. Cavity Shape and Size
The size and shape of the cavity
can be varied, and there are no
fundamental restrictions on
creating it, but its emissivity will
depend on the size of the aperture
compared to the total internal
surface area. The lower this ratio
is, the better emitter and closer to
a blackbody the cavity will
become.

11. TEMPSENS MAKE CAVITY & EXTENDED
AREA BLACK BODY

13. LBBCH
• Extended area BB with emitter size up to 300 x 300 mm.
• Wide Temp Range : 10 to 110 C. (-15 to 120 C Optional).
• N2 purging facility in case working below ambient (optional).
• Better aesthetic Design.
• Absolute mode and Differential mode of operation.
• Accessories like Chopper /targets can be integrated.
• Stability: +/- 0.01 C with uniformity +/- 0.2 C.
EXTENDED AREA BLACK BODY

14. EXTENDED AREA BLACK BODY
LBBH
• Wide temp range : 50 to 500 C.
• Emitter size up to 300 x 300 mm (customized size available).
• Better aesthetic Design.
• Better stability of +/- 0.1 C and Uniformity +/- 0.4 C @100 C.
• Multi zone control .
• Integrated with PCB.
• Can be integrated with Separate controller with 5 inch LCD display.

15. DIFFERENTIAL BLACK BODY
• Emissive area 80 x 80 mm.
• Absolute Temperature Range -35°C
with respect to ambient to 90°C with
respect to ambient.
• Differential Temperature Range -
30°C to 80°C (Ambient 0°C).
• Emissive area uniformity ±0.20°C
@50°C
• Stability ±0.01°C
• Display 5” LCD °C or °F user
selectable .
• Can be integrated with chopper and
target to test MRDT,NETD,MTF
Function and other parameters for
thermal imagers.

16. DIFFERENTIAL BLACK BODY
USER INTERFACE
Absolute Mode: In absolute mode
there will be temperature indication
for Emitter plate and target but no
temperature difference will be shown.
We can control only emitter temp
only.
Differential Mode: In differential
mode we can change temperature
difference between emitter and target
needed. We have to put delta T value
as set point. Controller will automatic
change emitter temperature to achieve
desired delta T value.

17. DIFFERENTIAL BLACK BODY

18. BLACK BODY WITH IR TARGETS
o Black body can be integrated with various Targets for measure different
characteristic of Thermal camera like MRTD, NETD, SiTF, MTF, 3-D
Noise etc.

19. E-O TEST SYSTEM: SETUP FOR TESTING THERMAL CAMERA PROPERTIES
APPLICATION

20. Targets of Different Shapes

22. BLACK BODY WITH CHOPPER
Aperture wheel integrated with blackbody.
Apertures Size : 0.0125'', 0.025'', 0.050'', 0.10'', 0.20'',0.40'',0.60''and 1.0'‘ .
(Tolerance ± 10%).
Black body can be integrated with Chopper with The variable frequency range
from 2 Hz to 1000 Hz.
Aperture wheel Aperture wheel with BB

23. CAVITY BLACK BODY
CALsys 1200BB v1
• Highly accurate temperature
Calibrator for Industrial / Laboratory
field use
• Cavity type Black body.
• Wide temp range: 300 to 1200 C.
• Better aesthetic design with stability
+/- 0.5 C.
• 40 mm aperture Size, Silicon Carbide
Cavity.

24. CAVITY BLACK BODY
CALsys 1500BB v1
• Highly accurate temperature
Calibrator for Industrial / Laboratory
field use
• Cavity type black body.
• Wide temp range 500 to 1500 C.
• Better aesthetic design with stability
+/- 0.5 C.
• 40 mm aperture Size, Silicon Carbide
Cavity.

25. CAVITY BLACK BODY
CALsys 1700BB v1
• Highly accurate temperature Calibrator
for Industrial / Laboratory field use
• Cavity type black body.
• Wide temp range 500 to 1700 C.
• Better aesthetic design with stability +/-
1.5 C.
• 29 mm aperture Size, ceramic Cavity.

26. CAVITY BLACK BODY
FASTCAL 3000 v1
• Cavity type Black Body Furnace.
• Temp range : 600 to 3000 C.
• Cavity Accuracy : +/- 0.25 % of Set
Temp +/- 1 C.
• Resolution : 0.1 C
• Stability : +/- 1C
• Emissivity : 0.9995(+/- 0.005)
• Cavity : Closed end graphite tube
length 292 mm heated length 127
mm.
• Safety interlock: Cooling water
over temp, low purge gas flow, low
cooling water flow rate, over
current and over temp protection.

27. FAST CAL GRAPHITE CAVITY ASSEMBLY
FASTCAL 3000

28. FASTCAL 3000 & AUTOMATIC CALIBRATION
High temp BB with Automatic Calibration
System for testing multiple pyrometers.
Multiple desired temperature set points
can be pre programmed for calibrating
pyrometer or thermal camera.
FASTCAL 3000

29. CUSTOMISED CALIBRATOR
CLIMATE CHAMBER WITH BB
Temperature range 0 to 70 C
with stability +/- 0.25C.
CALsys 1000BB
Temperature range 50 to 1000 C with stability
+/- 0.3 C . Aperture Size 29 mm.

30. Parameters Specification
Temperature Range 20 to 50 C
Power 100W
Supply Frequency 50/60 Hz
Resolution 0.01°C
Stability ± 0.01 at 37°C
Time to reach max.
Temperature
10 to 15 Min.
Operating
Temperature
5 to 50 °C
Dimensions 150 (H) x 110(W) x 137(D) mm
Emissivity 0.98 (±0.01)
Working aperture 70 mm X 70 mm
Weight Approx 4 kg
BLACK BODY CALIBRATOR
CALsys 37BB+

31. Parameters Specification
Temperature Range Ambient +5°C to 50°C
Power 100W
Supply Frequency 50/60 Hz
Resolution 0.01°C for CALsys 37BB-A
0.1°C for CALsys 37BB-B
Stability ± 0.04 at 37°C
Time to reach max.
Temperature
10 to 15 Min.
Operating
Temperature
20 to 40 °C
Dimensions 110 (H) x 110(W) x 137(D) mm
Emissivity 0.98 (±0.01)
Working aperture 70 mm X 70 mm
Weight Approx 3 kg
BLACK BODY CALIBRATOR
CALsys 37BB

32. SPECIAL FEATURES & VARIENTS
• High Accuracy
• High Stability
• Simple to use and cost effective
• Portability
• It has Tripod/Wall Mounting provision
• Reference RTD port for RTD calibration.

33. TESTING BLACKBODY

34. THANK YOU…