OAR 603-017-0040: Chart

The chart shall make one complete revolution in seven days, shall be graduated hourly and daily and must be not less than 10 inches in diameter. (1) Lowest temperature reading must be on the outer edge of the chart. (2) Accuracy. Zero shall be within one degree plus or minus. (3) Charts must be changed each week, properly dated, signed by Plant Manager, and be made available for inspection for at least one year.