PCB fault locator Qmax Test Technologies

QNImits is an innovative hand held test instrument, which uses the industry’s proven V-I Trace technique of learn and compare of Nodal impedances. Using this technique the technician only requires a known good board for comparison with a faulty one without schematics and functional details of PCBs. The known good board’s VI traces can be learnt and stored for future reference as well.

QNImits uses probe – reference to either on-line comparison of each node or alternatively uses external MUX switch and clips / adopters for multi-pin learn and compare.

QNImits displays the test results as VI trace, which shows the current against applied voltage in most commonly used graphical view. These trace formats help the user to easily understand the nodal behavior and interpret the results for quick diagnostics.

Using V-I curve traces one can detect a change in devices’ pin characteristics due to aging or damage caused by external forces. QSM VI mode uses all pins of the device as reference and hence able to detect leakages between pins as well.

This test technique works most of the time, because most of the failing devices shows a different response to VI trace unless there is no terminal failure.

The USB interface which comes as standard with QNImits helps in connecting to PC/AT or Laptop so that signature information learnt from Known Good Board can be saved for further verification and analysis.

Specifications

Fully user programmable VI trace drive patterns
Frequency from DC to 100 KHz
Source Impedance 100 Ohms, 1, 10, 100 KOhms & 1MOhms
Voltage selection: 1.5V, 3V, 6V & 12V
3.2” TFT Screen
Power : Battery or AC adapter