Exergen D501, D501-RS Brochure & Specs
D-Series Handheld IR Scanners
Microscanner
D-Series
A MUST FOR
ISO 9001
ISO 9002
ISO 9003
™
The Only
Certified Accurate
Surface Temperature Instruments
in the World
D501 and D501-RS
TRACEABILITY
PROGRAMS
Common Surface
Temperature
Measurement Errors
Pre-set Emissivity errors? very sensitive
1
Emissivity shift errors? very sensitive
2
User adjustment errors? very sensitive
3
Background reflection errors?
4
Contact errors? no effect
5
Friction heating errors? no effect
6
Heat sinking errors? no effect
7
Time based errors? no effect
8
51 Water Street, Watertown, MA 02172 USA
800-422-3006 • 617-923-9900 • F ax 617-923-9911
Conventional IR
“Point and Shoot”
Microscanner
D-Series IR
Thermometers
no effect
no effect
no effect
no effect no effect
no effect
no effect
no effect
no effect
guns and probes,
including laser
aimed units
very sensitive
51 Water Street, Watertown, MA 02172 USA
800-422-3006 • 617-923-9900 • Fax 617-923-9911
Conventional
contact probes,
thermocouples,
thermistors
very sensitive
very sensitive
very sensitive
very sensitive
RTDs,
no effect
no effect
no effect
D-Series Handheld IR Scanners
The D-Series is an entirely different type of instrument than conventional temper ature measuring devices.
Designed specifically for the highest possible accuracy, it is the only infrared instrument which can be certified
as to NIST-tracable accuracy on real surfaces of unknown emissivity, while completely free of contact errors and
heat sinking errors of contact devices.
Actual measurement area is in
the center, well away from
the area contacted by the edge
of the cone.
Recessed cone traps
all emitted surface
radiation, and blocks
out any radiation
from environment.
Only a thin lip of
material actually
contacts the target,
thus minimizing heat
transfer.
Figure 1. Unique Automatic Emissivity Compensation System (AECS) produces accurate
temperatures everywhere the infrared probe is placed, by creating its own blackbody.
Reflective cone automatically
corrects for emissivity
variations by creating an actual
blackbody at the precise
location of measurement.
Effect of Emissivity on Temperature Reading for a
500°F (260°C) Target in 70°F (21°C) ambient
deg F
550
500
450
400
350
300
Non-metals and Oxides
1. Emissivity errors
The true emissivity of a surface is known only
approximately. Conventional IR de vices
without Exergen’ s A utomatic Emissivity
Compensation System can only display an
approximate temperature ov er their entire
temperature range.
The “accuracy” specifications giv en by most
manufacturers are only f or a “b lack body”
calibration and do not hold outside laboratory
conditions. Blac k body calibr ations do not
include emissivity shifts, ambient change
effects on the target, and other phenomena that
Figure 2. D-Series is accurate over a wide emissivity
range, sufficient to include all non-metals. If a marker
(or any other non-metal coating) is used, the D-series is
accurate on clean metals as well. Conventional IR
devices have considerable inaccuracy.
introduce significant errors.
2. Emissivity shift errors
Even if an IR “gun” is set to the correct emissivity to read a surf ace
accurately at a particular temperature, it does not mean that the IR
“gun” will read the same target correctly at other temperatures.
Emissivity of virtually all surfaces changes with temperature. A
common assumption for conv entional IR thermometry is that
emissivity is constant with changes in target surface temperature.
Real materials do not have this characteristic.
D-Series using marker
D-Series w/o marker
Conventional Infrared
Emissivity
ε
Conventional IR
assumption
290
deg C
200
150
00.20.40.60.81
Clean Metals
Actual emissivity
51 Water Street, Watertown, MA 02172 USA
800-422-3006 • 617-923-9900 • Fax 617-923-9911
Temperature
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