Made an external trigger wheel to test the function of the engine speed sensor. Then I checked the rotor speed sensor using a variable speed drill. Checked high and low rotor RPM lights. Next I tested the temperature sendors with a heat gun and the pressure sensors by gooking up a compressed air source. I could only check the general function of the gauges, but could not check accuracy. I did that by checking the accuracy of the gauges before installing hem into the panel.
