THIS UNIT IS A COMBINED CONSTANT CURRENT SOURCE AND DIGITAL VOLTMETER. THE USER CAN INPUT THE DESIRED LEVEL OF CONSTANT CURRENT OR CHOOSE A SIMPLE AUTO RANGING FUNCTION. USED IN CONJUNCTION WITH A FOUR POINT PROBE THE READINGS CAN BE USED TO DETERMINE THE RESISTIVITY OF SEMICONDUCTOR SAMPLES. TYPICALLY USED IN RESEARCH APPLICATIONS, THE UNIT CAN BE OPERATED AS A STAND ALONE UNIT, OR BY USING THE SUPPLIED SOFTWARE CAN BE OPERATED BY A PC. THE UNIT CAN DISPLAY RESULTS AS VOLTAGE, OR AS A SHEET RESISTANCE MEASUREMENT IN OHMS PER SQUARE .

CLASSIFICATION IS DETERMINED ACCORDING TO GIRS 1 AND 6 OF THE COMBINED NOMENCLATURE. CN 90308200 FOR MEASURING OR CHECKING SEMICONDUCTOR WAFERS OR DEVICES.