Is my new keg leaking CO2?

[RunLikeAMeatstick]

First all, just wanted to say I'm new here, and also to kegging beer, so please have mercy.

Just kegged my first beer last night. I have a 5 gal corny ball lock keg with frah o-rings and the usual small CO2 tank the local brew shop normally exchanges. I wanted the beer ready for this weekend, so I turned the pressure up to ~28psi and was going to turn it down tonight to 10psi for the remainder of the week. I heard this method could be used to hasten the carbonation process.

Here's my question: I checked the regulator just now, ~20h after kegging st 28psi, and the tank psi has dropped from ~750 to 500psi, indicating I used 1/3 of the tank overnight. Is this normal or indicative of a major/minor leak?

Thanks in advance to whoever can help me out here!

 

[rekoob]

Spray it all down with soapy water to check for leaks around all the connections.

Your temp of the tank will also change the psi reading.

 

[RunLikeAMeatstick]

Ahh, I didn't think about the simple temp/pressure relationship. I did put both the keg and the co2 tank in the fridge. Darn you physics, you tricked me again.

 

[day_trippr]

Cheers!

 

[mcotter]

If it's a 5# tank then the high pressure gauge isn't necessarily an accurate reflection of the remaining CO2. Mine fluctuates quite a bit when I'm purging or burst carbing.

 

[brewprint]

With any tanks that I've had go out they still do drop on the gauge at the very end. That's when I know I only have a few days left to get a new tank.

As others have stated yours is probably from the temp drop.