Ocean Optics TR2 Engineering Note - Manual

Engineering Note
Topic: TR2 Information
Product Affected: TR2 Temperature Regulator, S2000 Spectrometer
Date Issued: 8/29/2002
Operation
The TR2 is a Temperature Regulator unit that stacks onto the 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 pushed out, the display shows the
actual temperature. The set-point temperature is viewed by pressing the pushbutton in.
The temperature is set by a digitally controlled potentiometer with 100 set points. To adjust the set-
point, press the pushbutton and then increment or decrement the toggle switch to the desired
temperature. 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, the operator 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 regulated +12V 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 follows:
• 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 in 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.
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