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Are you talking about a chronograph, to measure the arrow speed. I have one, and it works just fine. sometimes the ambient light can mess with them, and sometimes the truth of how fast your arrow is going can mess with you!!!!
Yeah....that's it. Seems about every 4th or 5th shot is a problem ( it shows two or three problem types, by code) and some of the responses are just wrong, like, 1/3 of any realistic speed. I'm not happy cause i just know my bow shoots those arrows at 250 to 300 fps and it shows 165 or a bit more, . Gotta be wrong.
Like I said...........sometimes the truth hurts!!!! 😆😆😆
What bow and arrow combination are using to get 250 - 300 fps?
Maybe the lighting is a factor and the reason testing is conducted indoors. It would also take wind out of the mix.
I'm guessing weak battery or bad light conditions. Bright light is as bad as low light.
I bought an LED light kit for my chrono and it hasn't taken a bad reading since. I got the light kit off amazon.
What are you shooting to get 250-300 FPS?
😉 eventually....you will understand me.
Steve...i will try to acquire such a kit.
I was getting pretty consistant 166 to 169 from my go to set up. Fast enough to make me like it, not fast enough to set the woods afire. Wierd though...a 3 piece hybrid design that requires much stiffer arrows for good flight sent those (stiffer..heavier) arrows down range maybe 40 fps SLOWER ! I though...no way. Till i used the above ( first) bow and had similar responses.
I did, also, have some that showed as, like 50ish fps, that were just not explainable, and then the ( i thought) high number of failures.
Well, i think my chronograph is a hbp model ( high blood pressure). That or just a universal POS model. Turned it on, inside, I'm certain i am inducing issues, like LED lighting etc. But. Got results as i expected, then crap results, then really crap results. It even seems ( seems) that arrow color changes reported speed. I was getting a decent cluster of responses, then a few that were ~3/4 of those responses, then some that were ~1/4 of the first responses. The first responses seemed realistic. The others....not so much. Oh, and then the error codes too. Do chronographs work as boat anchors ?
Not heavy enough for a boat anchor!!!!
Maybe the sensor windows are dusty. Blow the sensor windows out with compressed air, or wipe them with glass cleaning cloth, or use a scope cleaner to remove dust, dirt, oil, etc. Might help. I know mine gets grungy just sitting in the shop.
have used one a lot for years, and have not experienced your level of frustration. I get error messages some time, but I just throw them out.
You can get a low reading every 1/2 dozen shots, but in my case its usually a bad release. Again, I throw that out and just average the rest.
I watched a short YouTube video on checking the speed of a pistol with a chronograph. The first qualification mentioned was that the lighting needs to be good (no clouds). The problem with testing arrows may be the feathers, passing over the two sensors at the front and rear of the chronograph. Maybe the color, or shape of the feathers is a factor, or try shooting a bare shaft.