TR-2 Thermoelectric Temperature Regulator
TR-2 Thermoelectric Temperature Regulator
2
Operation
The TR2 is a Temperature Regulator unit that stacks onto an S2000 Spectrometer. The TR2 displays two
temperature values (in
o
C), the set temperature and actual temperature. The TR2 has two controls, a set point
pushbutton and a toggle switch. The display can toggle between viewing the actual temperature and the set-point
temperature. With the pushbutton out, the display shows the actual temperature. With the pushbutton in, display
shows the set-point temperature. The temperature is set by a digitally controlled potentiometer with 100 set
points. The set-point is stored in a volatile memory location. To store the set point permanently, press the toggle
switch to the down position and then press the set button. This action will lock the set temperature into permanent
memory.
A standard TR2 can be adjusted between 0
°
C and 37
°
C. However the TR2 is only capable operating 15
°
C
below the ambient temperature. At cool temperatures, you must insure that condensation does not occur
on the inside of the optical bench. By design, the maximum temperature set-point is 37
°
C.
The TR2 requires a reg12 V power supply that delivers at least 2 amps. Poor results may be obtained if a
non-regulated power supply or a supply that cannot deliver adequate current is used. The power connection is
configured for a positive center polarity.
The TR2 indicates its status with a two color LED. The status conditions are defined as:
Green – The TR2 has reached temperature stability (within 0.1
o
C)
Red – The TR2 has not reached temperature stability
Blinking Red – The TR2 is not running. Reset by pushing the pushbutton
The S2000-TR2 system operates from two power supplies; the 5V from the ADC Card and the +12V from the
external power supply. Depending on the order which power is applied, the TR2 may power up with a blinking red
LED. To clear the blinking LED press the pushbutton to reset the unit.
The following sections provide instructions for using the TR-2 Thermoelectric Temperature Regulator:
Using the Correct Power-Up Sequence
You must power-up the TR-2 system in the manner listed below to ensure that the TR-2 and sampling system
operate correctly. Otherwise, the unit may malfunction (indicated by a blinking red LED).
1. Connect power to the TR-2 using a reg12V DC power supply that delivers at least 2 amps.
Using a non-regulated power supply or a supply that cannot deliver adequate current/voltage will result
in unreliable or inadequate temperature control.
2. Connect the A/D interface cable to the S2000. Do not connect the A/D interface cable before connecting
power to the TR-2.
3. Disconnect power by unplugging the power source. If the system goes into system malfunction mode
during normal operation, press the set-point temperature button to reset the TR-2.
