Micro-ohmmeter
QT25 Qmax Test Technologies

QT25 uses a unique method to detect exact PCB short circuit locations and also pinpoint the shorted components/tracks. Ideally PCB tracks are suppose to have zero resistance, but in actual conditions they have small resistance. The exact location of the short is where the instrument reads the lowest value of resistance and this resistance could be detected with a sensitive instrument like QT25, even in power planes.

QT25 can also be used in measuring the contact resistance of switches and relays in its milli-ohm mode.

QT25 is designed to apply a drive voltage of less than 200 millivolts, while detecting shorts in the populated PCBs, so as to avoid turning on the semiconductor devices inside the circuit, which could lead to misleading results.

There is a composite '16 character alpha numeric backlit LCD display' to show the Resistance range selected, Offset indication, Resistance value, and also the Units.

1. 4 wire resistance measurement
2. Back-lit 16 character alpha numeric display
3. Complimenting modulated audio tone
4. Resistor range of 200 milliohms, 2 ohms and 200 ohms.100 micro ohm resolution in 200 milli ohm range
5. Auto offset capability upto 200 ohms