Newport 300 Series - Mounting Considerations; Model 300 Series Setup

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3.5 Mounting Considerations
The physical arrangement of the TE module, thermistor, heatsink, and the
device to be cooled or heated are crucial to the operation of a Model 300
Series Temperature Controller. This arrangement determines the thermal
load and the rate of heat dissipation to which the control circuitry must
respond. To achieve optimum temperature control the thermal path
between the device to be cooled or heated and the face of the TE module
must be as short as possible and must have high thermal conductivity.
This arrangement also determines the delay that the control circuitry must
respond to, and affects the gain setting of the control loop. Another factor
that must be taken into account is the mass of the heat sink required to
dissipate heat from the TE module. The better the heat sink dissipates
heat, thus reducing the thermal gradient across the TE module, the more
efficient the TE module is at removing heat from the device being cooled.
Figure 4 shows an arrangement that optimizes the cooling and temperature
stability achievable with the Model 300 Series Temperature Controller.
Two TE modules connected in parallel are shown in the diagram. The actual
connection of the TE module depends on the manufacturer’s specifications
for the voltage drop across the TE module and its current requirement.
Heat Sink
TE Module
Laser Diode
Laser Diode Mount
Figure 4: Mounting arrangement of a TE module, heat sink and laser diode
3.6 Model 300 Series Setup
Setting up the Model 300 Series Temperature Controller is a simple proce-
dure. An AC power cord, supplied with each unit, must be plugged into a
properly grounded outlet. The tilt up feet, at the bottom of the unit, may
be extended to enhance the viewing angle of the front panel. Connection to
TE modules and temperature sensors are made with one of the accessory
cables (part #300-02 or #300-04). The Analog Interface card, only available
in Models 325AN and 350AN, may be connected to either a plotter, a X-Y
plotter or to a computer.
3.6.1 Rack Mounting Model 300 Series Units
Two units, either Model 300’s or Model 500’s or one of each, may be mounted
side by side in the standard rack mount kit (part #35-RACK). Remove the
four feet on the bottom of the instrument. Use the screws supplied with the
rack mount kit and secure the bottom of the unit(s) to the bracket using
the two original front feet mounting positions. After tightening the screws
the unit(s) may be slid into a 19" rack and secured to the side rails.
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