56 Chapter 5 Temperature Controller Operation
→
→→
→
Lim Th= 50.00 °C
Lim Tl= 10.00 °C
Tol Time= 5.000 S
Tol Temp= 0.20 °C
→
→→
→
C1= 3.9080 x 10-3
C2=-0.5802 x 10-6
C3=-4.272 x 10-12
R0= 100.00
Ω
ΩΩ
Ω
Figure 30 - TEC Setup Screens
5.4.3.1 Sensor
Selects the temperature sensor type used in your TEC mount. If the
None
is selected,
only the I
TE
mode is allowed. This type is intended for applications running without
a temperature sensor. After selecting desired sensor, press ENTER. See the following
sections for discussions of the various sensor types. TEC modules support the
thermistor sensors (10µA and 100µA range), AD590, LM335, and RTD sensors.
5.4.3.2 Mode
5.4.3.2.1 Constant Temperature Mode (Const T)
This mode holds the TEC at a constant temperature based on feedback from the
sensor in the TEC mount, using “
Ts=
” and “
T=
” variables. In this mode, the 6000
uses a control loop comparing the sensor input to the temperature set point, driving
the I
TE
current positive or negative to reach and maintain that set point. The sensor’s
input is converted to temperature for display of actual TEC temperature. The I
TE
current is also displayed in this mode.
5.4.3.2.2 Constant Resistance/Reference Mode (Const R/Const v/Const i)
This mode operates identically to the Const T mode, but the sensor input is not
converted to temperature, and is displayed in unconverted form. Likewise, the set
point is used directly, not converted from temperature. Thermistor and RTD sensors
use resistance (Const R mode, “
Rs=
” and “
R=
” variables), LM335 sensors use
millivolts (Const v mode, “
vs=
” and “
v=
” variables), and AD590 sensors use
microamps (Const i mode, “
is=
” and “
i=
” variables). Const R, Const v, and Const i
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