Help me trouble shoot my Chronograph...

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Hello Folks...I have a Chrony Master and it was acting up today. For the first 30 rounds (VLD's), I got readings of 356.3, 358.8, 354.1, 349.6, etc. etc. I also got a couple ERR 9 and ERR 2 readings.

This is where it gets weird. I then switched over to 180 Grain Nosler E-Tips and I started getting velocity readings in FPS...and they were right about where I would have expected them to be. I do however need to replace the balance beam bearings on my scale...I was getting quite a bit of deviation (more than normal)...and I had on 180 Grain Nosler E-Tip hit 3382 fps.

Does anyone know what could have been causing the weird readings for the first 30 rounds???

GONESHOOTING

I have the f-1 and never had that kind of problem, I had err for the sky screens not catching the bullet.
Is the 9 volt battery ok[?]

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quote:Originally posted by GONESHOOTING
I have the f-1 and never had that kind of problem, I had err for the sky screens not catching the bullet.
Is the 9 volt battery ok[?]



What exactly do you mean by the sky screens not catching the bullets.?.?

GONESHOOTING

quote:Originally posted by ECC
quote:Originally posted by GONESHOOTING
I have the f-1 and never had that kind of problem, I had err for the sky screens not catching the bullet.
Is the 9 volt battery ok[?]



What exactly do you mean by the sky screens not catching the bullets.?.?
If it is cloudy and it doesn't catch the bullets shadow on the first or second screen you will get an err. Or gives you a false reading.

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quote:Originally posted by GONESHOOTING
quote:Originally posted by ECC
quote:Originally posted by GONESHOOTING
I have the f-1 and never had that kind of problem, I had err for the sky screens not catching the bullet.
Is the 9 volt battery ok[?]



What exactly do you mean by the sky screens not catching the bullets.?.?
If it is cloudy and it doesn't catch the bullets shadow on the first or second screen you will get an err. Or gives you a false reading.


I was actually set up in a shady area...that could have been part of the problem. Those were weird readings though...

sandwarrior

Eric,

Have you first replaced the battery? That was the key in getting the hundreds of fps instead of the thousands for me.

The error message is from the bullet not crossing the screens squarely.

Edit:

To clean the screens if it is them just take a q-tip soaked in isopropyl alcohol.

bpost

Shady gray is better for a chronograph. On bright sunny days I put a walmart bag over the screens to create diffuse light. Did you push the FPS-MPS button? [:D]

Error 2 is missing the second sky screen. Put tape on the screen bars 1" below the diffuser. Make sure the chrony is level in your cross hairs before firing. You might be shooting the bullet so close to the sensor it is missing the shot.