Fuse tester with visual and audible indication?

I am required to develop a Handheld Fuse Continuity Checker suitable for use by our new team of non-technical testers. The Handheld Checker should provide both visual and audible indication of continuity. Complete bought-in units are NOT to be employed. Also, minimum cost criteria should be observed.so need the correct circuit for single rated fuse and a circuit capable of testing fuses of 3 to 100 amp?