I chrony in the cold.
Mine is the one ( Gamma Master?) that has a separate display so the control/display/memory is closer to the shooter.
First, I tried using a big plastic box with a two litre bottle of hot water to keep the chrony warm - small holes in the top for the light sensors. Holes for the little guide rods also. That works, but is a bother.
Then I built a wooden box which is only slightly larger than the chrony and put a sliding glass lid on it.
I don't use the guide rods anymore, just line up the box for straight.
If the sky is bright, I have a white plate of glass that I put over so it can get a perfect shadow of the bullet. If it is gloomy, I may take it off and just use the sky.
If the sky is really gloomy, I slide the glass lid open also.
One little improvement would be a light setup for the skyscreen for dim light use.
***** The weakness of the instrument was not the LCD failing in the cold, but the 9 volt battery failing to put out enough voltage in the cold. *****
It may not read low battery, but it does need more volts in the cold.
To remedy the battery problem, I now use a 12 volt rechargable remote control car battery pack instead of the little 9 volt battery.
You could carry a spare good battery in a warm pocket and try it when the screen fails.
One last little problem is muzzle blast - which messes up my readings if the brain box is too close to the bang.
Last weekend, I finally had a chance to test my loads but could not get a display. I would guess it must be the LCD, I tried to warm it up but got frozen quickly. Or would it be the chrony also?
Does anyone have any tricks to rectify this? Thanks.
Ronnie
