Gage adjustments.—When a weighted gage is adjusted for altitude, it needs no further regulation.
A dial gage should be checked before the canning season. If you use the canner frequently, have the gage checked several times a year. Ask your extension home economist, your dealer, or the manufacturer about checking the accuracy of a dial gage.
If the dial gage is not accurate, tie a warning tag to the canner. On the tag, write the margin of error, the date the canner was tested, and the gage setting to use for the correct pressure (see below).
All directions in this bulletin require processing at 10 pounds of steam pressure. The following adjustments give the correct pressure:
If the gage reads high—
1 pound high—process at 11 pounds.
2 pounds high—process at 12 pounds.
3 pounds high—process at 13 pounds.
4 pounds high—process at 14 pounds.
If the gage reads low—