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Figure 5
Glossary
Term
Definition
LED
Light Emitting Diode: A solid state device that converts electricity directly into light.
Measurement
Pulse
The momentary application of heater power that is used only to measure heater resistance.
Pulse Heating
Heating that occurs not due to the request for heat, but due to the heater being energized
momentarily to check its temperature.
SSR
Solid State Relay: A type of relay without mechanical contacts constructed from solid state
components.
TCR
Temperature Coefficient of Resistance: The relationship between the temperature and resistance of
a heater.
USB
Universal Serial Bus: A common computer interface on computers for interfacing to various
peripherals.
0
2
4
6
8
10
12
-25
-15
-5
5
15
25
35
45
55
65
R
a
te
d
D
C
S
w
it
c
h
in
g
C
u
rr
e
n
t
Ambient Temperature (°C)
60 VDC
80 VDC
