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A tachometer (revolution-counter, tach, rev-counter, RPM gauge) is an instrument measuring the rotation speed of a shaft or disk, as in a motor or other machine. [1] The device usually displays the revolutions per minute (RPM) on a calibrated analogue dial, but digital displays are increasingly common.
The tach timer is usually used to schedule engine maintenance, although it is just an approximation of "Time in service" which is used to time and schedule aircraft maintenance. Time in service is defined in 14 CFR 1.1 [ 2 ] as the actual time in the air, whereas tach time measures engine revolutions, which would still count time on the ground ...
Tachometer time or "tach time" is recorded in the engine's log books and is used, for example, to determine when the oil should be changed and the time between overhauls. Tach time differs from Hobbs time in that it is linked to engine revolutions per minute (RPM). Tach time records the time at a specific RPM.
tachometer: revolutions per minute, rate of blood flow, speed of aeroplanes taximeter: distance travelled, displacement tensiometer: surface tension of a liquid theodolite: angle, in the horizontal and vertical planes thermometer: temperature tiltmeter: minor changes to the Earth tintometer: colour universal measuring machine: geometric ...
Tachometer - A gauge to indicate engine speed in RPM or percentage of maximum. Manifold pressure (MP) gauge - Indicates the absolute pressure in the intake manifold. For an aircraft equipped with a constant speed propeller, this is the most direct indication of the engine's operating power.
A host of functions required for ECU software calibration, such as interface-dependent calibration methods, calibration data management, measurement data visualization and analysis, ECU programming, vehicle bus monitoring, as well as remote control through standard interfaces, are part of the product's functional complement.