Precision Control Systems ChamberIR E4 - Manual (Page 6)

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Time (sec)
Te
m
p
(ºC
)
dissipates to ten percent within five seconds after power is removed. The instant on/off feature
offers a great number of benefits to the user including reduced warm up and cool down times.
Focused -
T3 lamps have a small filament, which allows the energy to be focused towards a target. By
focusing the IR, the concentration of heat is greatly increased, which allows small targets to see
more thermal energy and allows higher process line speeds.
Controlled -
The ability to control the direction of the infrared heat,
along with rapid response, allows higher heat transfer
rates than with other infrared and convection systems.
Figure 2 shows the heating of a silicone-jacketed wire.
Using an E4, the wire is heated to curing temperature
in several seconds, as compared to 2 to 5 times longer
with other systems.
Applications
Low Temperature Applications-
Most pre- and post- plastics and rubber extrusion
applications are low temperature (under 400
°C). Under these conditions, it is only necessary
to provide water-cooling to the reflectors to allow the heaters to run continuously. The
recommended maximum product diameter in these applications is 0.25 inch (6 mm). The
heater will accommodate product size up to 2.5 inches in OD, however the heating will not be
uniform around the circumference if the OD is greater than 0.25 inch (6 mm). Refer to the
Model 4069 product data sheet for uniform heating of larger materials.
High Temperature Applications -
The Model E4 may also be operated as a high temperature furnace. Transient product
temperatures to 2000
°F (1100°C) and continuous product temperatures to 1500°F (815°C) can
be achieved with the Model E4. Air-cooling options (A/AA) are recommended if operated in this
mode.
Specimen Sizes -
The Chamber will accommodate specimens up to 2.50 inches in diameter. When operating at
high heat flux outputs (lamp rated voltage or greater) the specimen should be no less than 1/8th
inch in diameter and of a length equal to lamp lighted length, to prevent lamp damage.
Specimen Temperature -
Transient temperature up to 3000˚F can be reached and higher specimen temperatures may be
reached but at a risk of premature lamp failure. A continuous set point of up to 2000˚F may be
achevied. Shorter periods at constant temperature apply as specimen approaches maximum.
For highest specimen temperatures and heating rates, specimen surface should be blackened
to increase the absorptive characteristics.
Figure 2 – Silicone Jacketed Wire Heating
0.1” (2.5 mm) OD Silicone Wire - 275º C
Cure
E4-25 with 2500-watt lamps