The new 1660 Series Installation Testers are the only installation testers that help prevent damage to connected equipment. The new 1660 Series is even more powerful, enabling you to perform tests quickly and efficiently in accordance with local regulations, protecting equipment that may be inadvertently connected to the system under test, making it easy to share test results via your smartphone, and offering 8 key tests at the touch of a button, reducing test time by up to 40%. Protect the installation. Avoid costly mistakes. The Fluke 1664 FC Installation Tester is the only installation tester with insulation pre-testing, so it can warn you of potentially serious and costly mistakes. When the Installation Tester detects that a device is connected to the system under test, it stops the insulation test and provides a visual warning signal, helping to avoid accidental damage to peripheral equipment. The Fluke 1662 has the renowned reliability of Fluke instruments, is easy to use and offers all the measurement functions needed for basic installation testing.