Several different issues can be caused by damaged Skyscreens. Each Skyscreen should be tested individually by plugging it into the “Start” jack on your chronograph. There should be only one Skyscreen plugged in to the chronograph at any time during this test. Proceed to fire over each screen individually; an air-gun, .22 rimfire, or even a slingshot is fine for test purposes. One of three things should happen:
I) The chronograph prints one line of data, and/or the display changes/ flashes: This indicates the chronograph received a trigger and the Skyscreen is functioning correctly. Repeat the test with the next screen.
II) Nothing happened: The Skyscreen did not trigger the chronograph. There is probably a short in the Skyscreen circuit and it will need to be repaired or replaced.
III) The chronograph started printing or triggering as soon as the Skyscreen was plugged in: The chronograph is “False Triggering”. If only one of your Skyscreens exhibits this behavior, it will need to be repaired or replaced. If more than one Skyscreen causes this problem, it is unlikely multiple screens are damaged in the same way, see “35P prints or displays data when I have not shot over it” below.