Universal Process / Temperature Controllers
Ultra-Stable 2.2A Temperature Control Across Ambient
The WTC3243 controller has been upgraded for greater temperature stability, even across ambient. The WTC3243 is designed for electro-optical systems, airborne instrumentation, spectroscopic monitors, and medical diagnostic equipment.
Proprietary circuitry in the WTC3243 does not exhibit loss of control across ambient. An on-ambient stability of 0.0014ºC has been achieved with thermistors.
The linear, PI (proportional, integral) control loop offers maximum stability while the bipolar current source has been designed for higher efficiency. Optimized for ultra-stable thermoelectric temperature control applications, the WTC3243 maintains precision temperature regulation using an adjustable sensor bias current and error amplifier circuit that operates directly with thermistors, RTDs, AD590, and LM335 type temperature sensors. It supplies up to 2.2 A for either thermoelectrics (bipolar) or resistive heaters (unipolar).
The proportional gain (P) and integrator time constant (I) are set by external resistors and can be modified to optimize temperature overshoot and stability. Other features offer added flexibility. Independent heat and cool current limits are set by single resistors. An onboard reference voltage simplifies potentiometer control of the temperature setpoint. The WTC3243 can be operated remotely with an external setpoint voltage. Thermal management accessories such as form-fitting heatsink, thermal washer, and fans maximize power dissipation. An evaluation board is available to quickly integrate the WTC3243 into users' systems.
