Patent ID: 6242903
Filing Date: 2001-06-05
Classification: G01R

Abstract:
A method of replacing a circuit board disposed in an insulated electrical probe, comprising:providing an elongate and hollow casing member, a tip rotatably attached to the casing member, a sensor disposed within the casing member for sensing the presence of a voltage when the sensor is positioned adjacent an electrically conductive member, an indicator disposed within the casing member, an integrated circuit disposed within the casing member, a first filter attached to the integrated circuit and a power source disposed within the casing member for powering the sensor, the indicator and a first integrated circuit;positioning the sensor adjacent an electrically conductive member;the sensor sensing a voltage of the electrically conductive member;the sensor transmitting a detection signal to the first filter;the first filter receiving the detection signal from the sensor;the first filter transmitting the detection signal to the indicator when the detected voltage has a frequency that is greater than about 10 Hertz;disengaging a circumferential radial protrusion of the casing member from a circumferential groove defined inside the rotatable tip and removing the tip from the casing member;removing the circuit board disposed inside the casing member;installing a second circuit board into the casing member, the second circuit board having a second filter;positioning the sensor adjacent the electrically conductive member;the sensor sensing a voltage of the electrically conductive member;the sensor transmitting a second detection signal to the second filter;the second filter receiving the second detection signal from the sensor;the second filter transmitting the second detection signal to the indicator when the detected voltage has a frequency that is greater than about 20 Hertz; andterminating the detection signal when the detected voltage has a frequency that is less than about 20 Hertz.