The Whirlwind SC48RJ Tester is an excellent tool that enables rapid and reliable testing of NL4 and NL8 type multiline speaker cables, RJ45 type data cables, and XLR cables. By rotating the central switch, it applies voltage to the cable conductors one by one. A SEND LED clearly shows the pin where the voltage is applied, and a RECEIVE LED indicates where it returns. This helps you quickly identify shorts, opens, and cross - wires.
To use the Whirlwind SC48RJ Tester, start by connecting the cable you want to test. Then, rotate the central switch. As you do this, the SEND LED will tell you which pin the voltage is being sent to, and the RECEIVE LED will show where the voltage comes back. If there are any shorts, opens, or cross - wires, the LEDs will show you the problem areas. When using the tester, make sure the cables are properly connected. Don't force the connections as it may damage the tester or the cables. After use, store the tester in a dry and clean place. You can wipe it with a soft cloth to keep it clean.
