HUNTRON Instruments, represented by Metromatics , has released the Huntron Tracker 2700 which extends the capabilities of power-off testing to trouble shoot low voltage logic circuitry.
Its low voltage ranges also make it suitable for testing passive devices such as high value capacitors while still in-circuit.
Using a power off test method known as Tracker Signature Analysis, it eliminates the risk of further circuit damage, which often occurs when power is applied.
The Tracker 2700 also incorporates Huntron's SigAssist feature, which displays real time numeric information relating directly to the displayed signature.
Information such as breakdown voltage, resistance, capacitance and power are displayed on the LCD to assist in signature interpretation.
Due to modern complex switching power supplies with many passive components the Tracker 2700 allows resistors, capacitors and inductors to be analysed without turning on the solid state devices.
The passive devices are essentially tested "out of circuit". Today's electronics devices use 3V or lower logic circuits - the Tracker 2700 has 21 selectable voltage/resistance ranges available in five frequencies resulting in a total of 105 combinations of voltage, source resistance and test frequency.
The Tracker Signature Analysis works by applying a current limited ac signal across two points of a component. The current flow causes a vertical deflection of the trace, while the applied voltage causes a horizontal deflection.
Together they form a unique V/I signature that represents the overall health of the device under test. Analysing the signature can quickly determine whether the component is good, bad or marginal.