Designed to be economical and flexible, the LDT-5412B Thermoelectric Temperature Controller offers a stable, low noise bipolar output and is optimized for controlling the temperature of laser diodes and photodetectors. Two of the temperature sensor modes, 10 µA and 100 µA, allow the thermoelectric controller to control and display thermistor resistance while delivering bipolar current to a thermoelectric module. A third temperature sensor mode, linearized 10 kΩ, allows the temperature controller to display and control a calculated temperature set point with a 10 kΩ thermistor. The units hybrid proportional-integral controlloop offers fast settling times with a typical long term temperature stability of ±0.01oC.
The intuitive front panel features a highly visible LED display, which has three display modes for easy operation: (1) SET, which displays the setpoint resistance or temperature (linearized mode only) level, (2) ACTUAL, which displays the actual resistance of the thermistor sensor or calculated temperature (linearized mode), and (3) TE CURRENT, which displays the drive current to the TE module.Three visual fault indicators located on the front panel provide immediate information of fault conditions. The SNS OPEN indicator lights when the connection to the thermistor sensor is open. The TEC OPEN indicator lights when the connection to the thermoelectric module is open. When either of these occurs, the unit's output is automatically shut off. The I LIMIT indicator lights whenever the output is actively limited to the user-set current limit value.
The incorporation of user-selectable temperature sensor modes of 10 µA, 100 µA, and linearized ensures versatility over a wide range of temperatures and applications. This allows the LDT-5412B to operate over a thermistor control resistance range of 10 kΩ to 200 kΩ. In addition, the unique linearized thermistor mode of the LDT-5412B can display and control temperature using a 10 kΩ thermistor. By using a precision 10 kΩ thermistor, users can achieve temperature accuracy of ±1.0°C without programming in Steinhart-Hart constants. In linearized thermistor mode, the LDT-5412B can operate over a 10°C to 40°C temperature range.
The LDT-5412B allows the user to bypass the internal set resistance function of the front panel knob and control resistance setpoint with an external resistor of known value. This is convenient for reproducing the same temperature quickly and accurately.In addition, the LDT-5412B 's PI control loop optimizes slew rate and settling time. Adjustment is easy with the rear panel GAIN control. For automated testing or to remotely compute actual temperature, the LDT-5412B also offers an analog voltage output that corresponds to the thermistor resistance.The units output can be current limited anywhere within its 0-2A range by using the recessed front panel LIMIT control knob. During operation, the thermoelectric module current is unconditionally held to the set limit value, ensuring the TE module cannot be over driven.
Full product specifications can be found in the LDT-5412B Brochure .
For additional questions contact ILX Lightwave directly at 800-459-9459 or firstname.lastname@example.org.