Short Circuit, Branch Circuit, Soak Test

3M™ Advanced Systems Tester 900AST Series

Short Circuit

A short circuit (or zero-Ohm resistance fault) will show up as the lowest dip on the screen. You cannot see events past a short circuit

Branch Circuit

The beginning of the branch circuit will look like a small dip and the end of the branch will look like an open (upward peak). Use the 900AST tester Resistance function to measure the resistance of the conductors. If the resistance is high, you may suspect a branch circuit.

Resistance Faults on Coaxial Cable

A resistance fault will show as a dip on screen. The lower the value of resistance (or the closer to a zero- ohm short), the lower the dip. Use the resistance function to check the coaxial cable for a resistive fault. Use the Soak test function to determine if the resistive fault is caused by moisture, corrosion or if it is purely resistive.

Soak Test

Use the Soak Test function to continuously measure the insulation resistance of a coaxial conductor inner conductor to shield.