English to Portuguese Tech/Engineering Electronics / Elect Eng métodos de ensaio

To increase spread, increase the knockmeter reading to 80 or more by adjusting the fine spread dial clockwise and then reduce the knockmeter reading to 50 ± 3 by adjusting the fine meter reading dial counterclockwise.

spread, n—in knock measurement, the sensitivity of the analog detonation meter expressed in knockmeter divisions per octane number.
Digital Detonation Meter Spread and Time Constant Settings—Experience has shown that these variables can be left constant, and default values can be used. the default value for Spread on the Digital Detonation Meter can be left at 0, and the default value for Time Constant on the Digital Detonation Meter can be left at 38.
Analog Detonation Meter Spread and Time Constant Settings—Optimize these variables to maximize spread commensurate with reasonable K.I. signal stability.

To increase spread, increase the knockmeter reading to 80 or more by adjusting the fine spread dial clockwise and then reduce the knockmeter reading to 50 ± 3 by adjusting the fine meter reading dial counterclockwise.
A2.5.3.3  To decrease spread, decrease the knockmeter reading to 20 or less by adjusting the fine spread dial counterclockwise and then increase the knockmeter reading to 50 ± 3 by adjusting the fine meter reading dial clockwise.
A2.5.3.4  If at any point during the spread adjustment procedure, adequate range of adjustment is not possible using the fine controls, the coarse dial for that function should be moved so that proper range is available using the fine dial.