Hall Effect Set-Up Dhe-33

The set-up, DHE-33 consists of two sub units to handle the probe parameters (probe current and hall voltage) and measurement of temperature. While the probe current is generated and measured by a constant current source (0-20mA) having a resolution of 10mA, the hall voltage is measured by a high input resistance millivoltmeter in the range 0-200mV having a resolution of 100microvolt. The Probe. Current and hall voltage are both displayed on a 16 x 4 line LCD display. The sample temperature is controlled by a microcontroller based PWM heater current source. Thermo EMF of the thermocouple is converted into temperature and is displayed on the same 16 x 4 line LCD display on the panel. Temperature range is ambient to 100°C and resolution is 1°C.