Electronics International M-1 Manifold Pressure - Manual (Page 8)

Route the (Optional) External Warning Control Line:
The white/yellow wire can be connected to an external light (AL-1), buzzer (ATG-1), voice annunciator (AV-
17), a relay, etc. This wire grounds when the red warning light is on. The current in this line must be limited to 2/
10 of an amp maximum. Exceeding this limit will damage the unit. If this feature is not used, leave this line
open. Tie wrap this wire so it does not obstruct the freedom of travel of any controls.
Install the Instrument in the Panel:
Install the instrument from behind the instrument panel using 6 x 32 screws. These screws should not be any
longer than 1/2".
Connect the Circular Connector to the Instrument:
1) Push the two mating connectors together and twist them until they snap into position.
2) Turn the locking ring on the instrument connector clockwise (1 1/2 turns) until it locks into position.
Connect the Manifold Pressure Line:
Connect the aircraft manifold pressure line to the pressure port on the back of the instrument. Be sure this
line is tight. This pressure port is a 1/4" flare union and is standard for most manifold pressure gauges. Care
should be taken not to put excess pressure on the flexible line between the flare union and the pressure transducer
mounted on the back of the instrument. The Pressure Transducer Port can break. Make sure the flexible pres-
sure line does not have any kinks.
Pressure Transducer.
Back of Unit.
.170 ID Flexible Line.
Pressure Port.
Aircraft Manifold Pressure
Line.
6 Rev. C: 9/30/97