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Northwind

Which chronomononomanomotomoroaotron?

Nailed it

OK so, thinking of an upgrade and the two that get spoken of well seem to be the competition electronics prochrono, and the caldwell ballistic precison. They both seem pretty comparable, I've spotted some good deals on the caldwell with its indoor/ir light kit and it comes with the smartphone interface, but otoh PC interfacing on the prochrono seems better. Basically i cannot be arsed to write things down any more  Laughing

Not going to rush on this one but any feedback'd be appreciated.
FDT OldNoob

The Caldwell has the app, which makes data collection very easy. It has not bad calibration and I haven't heard anyone get wildly innacurate readings with it, nor have I seen any suspect videos using one online.
The CE ProChrono has no app, meaning you have to faff with data collection, it has good string memory and does averages etc, like the Caldwell but is prone to artificial light over reading, as all open top chronos are. I have found mine very reliable and it has maintained its accuracy despite travelling all over the country and going to GC numerous times.
The CE has 99 shot 9 string memory, which lasts as long as the battery.
Not tried the PC interface on the CE, ask Boff about his. If it's no good then the Caldwell should be good if you don't want writing.
Davera

I have the cladwell and it's smartphone interface is excellent. It really does make doing a 50 dart shoot a breeze. It's also handy to have all your data at the touch of your fingers.

It's accuracy is the only thing I can't be 100% sure on.

Would people be interested if Oldnoob could do a shoot out comparison between his and the Cladwell? That is of course if OldNoob is happy to do that.
FDT OldNoob

If someone lends me a Caldwell I can calibrate it. There's a certificate of conformity usually in the box, or a stated accuracy rating from the manufacturer.
Davera

I will sort out sending it out this week if that's ok.
Northwind

Cheers guys!

OldNoob wrote:
If someone lends me a Caldwell I can calibrate it. There's a certificate of conformity usually in the box, or a stated accuracy rating from the manufacturer.


Yah, but then again shooting chromies have that too. The question is more whether you trust it/whether it stands up to real world examination.
SSGT

To be fair I think most of the issues with the Chrony come down to user error. Poor artificial lighting can affect all open-top chronographs although the Chrony has the additional issue of a hinge. I'd warrant to bet a fair few over-reads have come from people not checking that the Chrony is fully open (or worse, not opened fully on purpose to artificially inflate results).
Davera

I am always aware of bad lighting when using mine so do a test shoot with a stock strongarm to make sure the lighting is about right.
FDT OldNoob

The F1 still gets routinely barred from shooting clubs and archery competition, that's enough for me to not recommend it. If you know how to set it up and don't mind calibrating it correctly almost any cheap open top chrono can be made to work fine, it's just that most people don't bother or cheat them, especially the F1.
mipevi

I got the Caldwell + IR light kit. I've never used another chrono but I do like this one, the app is very helpful. Also interested in seeing OldNoob take a Caldwell for a test drive.
SSGT

OldNoob wrote:
The F1 still gets routinely barred from shooting clubs and archery competition, that's enough for me to not recommend it.


I've heard rumours of that but I can't say I've come across it myself. If it is true it's possible, like you mention, that it's down to being too easy to cheat (you could sneakily partially close the Chrony when no one is looking) although I also can't say I've ever seen chronographs used in competition other than to check rifles meet safety regulations or velocity limits (where making a Chrony read high wouldn't benefit you as it would only lead to the banning of the use of your otherwise borderline acceptable firearm on that range).

On a side note I'm pretty sure the ProChrono has a serial interface for PC connection - it might be possible to modify the program I've made to collect data from my Chrony to work with the ProChrono aswell without needing their expensive adapter/program.
FDT OldNoob

I have to confess to hearing the same rumours, plus it had lousy memory functions. That interface would be useful. No good for me as I only have a MacBook.
Boff

I have also heard the same rumours. Some competitions build for 'how fucking hard can I make this thing shoot?' which would lead to F1s being banned for an obvious reason.

In terms of the Prochrono interface, it does indeed have a PC interface. It uses an analogue output and a 3.5mm stereo jack. Competition Electronics will send you the spec if you ask nicely enough so developing a simple app for a device with a stereo jack would be simple enough.
SSGT

It should be TTL digital out like the Chrony. As far as I can tell the only difference between the Chrony and ProChrono serial interface is the pinout on the 3.5mm jack (no biggie, just wire it differently) and the baud rate - the only issue might be how they send the data. After each shot they send a stream of characters (including spaces and new line characters) which usually include things like string number, shot number, velocity and (at least with the Chrony) some other number that I guess might be the raw time/clock data that it then calculates a velocity from. You basically have to read each character as it comes in and pull out what you need but the thing that separates/identifies each piece of data will likely be different between chronos - you can tell it was meant to be printed out as is rather than exported.

I'm not entirely sure if you could actually use a 3.5mm audio jack on a phone/tablet to read that data - it might be possible but that's something that's a bit beyond me. A TTL to RS232 adapter allows you to send the data to a computer though (and to be honest the program is so simple it probably will work on Mac/Linux with Wine as long as the computer has a RS232 port or there are RS232-to-USB adapter drivers available for the OS). It's a simple command line program that I threw together in C because I was fed up of constantly going back and forth between shooting and entering velocities into spreadsheets - it reads them all in as you shoot and lets you export the data to .csv files.

The Chrony can also display max/min/average/ES/std. dev. but you need a remote that also plugs into the 3.5mm jack (I have made one with a pass-through that you can use at the same time as the data cable though).

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