Ampere-hour is a unit of electric charge. One ampere-hour is the electric charge that flow in electrical circuit, when a current of 1 ampere is applied for 1 hour. 1Ah = 1A 1hour. One ampere-hour is equal to 3600 coulombs.
1 If your propane tank has been requalified, the requalification date will be printed on an oval sticker and affixed to the collar of the tank. 2  If the date on the sticker does not have a letter to the right of it, your propane tank needs to be requalified within 12 years of the date on the sticker.nstructions. Locate the collar of your propane tank. The collar is the raised piece of metal at the top of the tank, surrounding the valve. On the bottom half of the collar, look for the letters MFG DATE.. This indicates the manufacturing date.
where to place your propane tank. For proper delivery service, a tank should not be installed more than 80 feet from your driveway. This helps alleviate any problems of reaching the tank during the winter season. All propane tanks must be: 1  a minimum of 10 feet from any part of a structure, deck, storage shed, property line, air conditioning unit, electric meter, or any source of ignition. 2  a maximum of 80 feet from a driveway.