Additel 680 - Calibration Points for Pressure Gauges; Single Scale Gauge Calibration Points; Compound Gauge Calibration Points

7.2 Calibration Points
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(1) Single scale gauge: We recommend at least two pressure calibration points should be used
when calibrating the 680 gauge. Usually at 0 and 100% of full scale(Vacuum gauge should
use vacuum point).
(2)
(1) The first point should be smaller than the second point.
(2) The second point should be smaller than the third point.