Ocean Optics OOISensors - Manual (Page 100)

6: Hardware Data Sheets and Instructions
Oxygen Probe Temperature Control Accessories
Temperature affects the fluorescence decay time, the fluorescence intensity and the collisional frequency
of the oxygen molecules with the fluorophore -- and therefore, the diffusion coefficient of oxygen.
Temperature also affects the solubility of oxygen in samples. The net effect of temperature fluctuations is
seen as a change in the calibration slope. If you cannot maintain the sample at a constant (+/-3
° C)
temperature, then you should calibrate your Fiber Optic Sensors System by using the temperature
compensation features and measuring temperature and oxygen concurrently. The FOXY-TS1 Thermistor
and the FOXY-TK1 Thermocouple monitor the temperature of the sensing environment and OOISensors
Software corrects for changes in data due to temperature fluctuations.
FOXY-TS1 Omega Thermistor
A thermistor, a type of temperature-to-resistance transducer, is able to transduce temperature into a
continuous electrical signal. A circuit measures the resistance of the thermistor and provides an output
voltage proportional to the temperature. The FOXY-TS1 Thermistor from Omega is a stainless-steel
tubular electrode probe most often used for liquid immersion. The FOXY-TS1 can monitor temperatures
from 0
° C to 100° C. It connects to the FOXY-T-MOD-1, an RS-232 module that interfaces the
thermistor to your PC.
Application Tips
• Immerse the FOXY-TS1 to its cap.
• Use detergents to clean the FOXY-TS1 after use.
Operation
► Procedure
1. Connect the FOXY-TS1 to the FOXY-T-MOD-1 RS-232 module. (Rack-mounted systems have
the modules installed into the rack box.)
2. Connect the FOXY-T-MOD-1 RS-232 module to the PC. You must have an available serial port
on your PC. Note the serial port number (also called COM Port) on the PC to which you are
interfacing.
3. Plug the +12VDC wall transformer into an outlet and connect it to the FOXY-TS1.
4. Open OOISensors software and select Configure | Spectrometer from the menu. Select the
Sensors tab. Next to the Temperature Measurement option, select Omega D5xx1 RS232 for
automatic temperature monitoring. Finally, enable the Compensate function.
5. Select the COM Port number (next to Serial Port) on your PC to which the thermistor is
connected.
90 FOXY-AL300-000-02-0207