Electronics International R-1-N1 - Manual (Page 10)

Route the External W Route the External W Route the External W Route the External W Route the External Warning Control Line: arning Control Line: arning Control Line: arning Control Line: arning Control Line:
The white/yellow wire can be connected to an external light (AL-1), buzzer (ATG-1), voice annuncia-
tor (AV-17), a relay, etc. This wire grounds when the red warning light is on. The current in this line must
be limited to 1/10 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
Tie wrap this wire so it does not obstruct the freedom of travel of any Tie wrap this wire so it does not obstruct the freedom of travel of any Tie wrap this wire so it does not obstruct the freedom of travel of any Tie wrap this wire so it does not obstruct the freedom of travel of any
controls. controls. controls. controls. controls.
Install the Instrument in the P Install the Instrument in the P Install the Instrument in the P Install the Instrument in the P Install the Instrument in the Panel: anel: anel: anel: anel:
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: Connect the Circular Connector to the Instrument: Connect the Circular Connector to the Instrument: Connect the Circular Connector to the Instrument: 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 posi-
tion.
Check Instrument Operation: Check Instrument Operation: Check Instrument Operation: Check Instrument Operation: Check Instrument Operation:
To check instrument operation perform the follows:
1. Turn the master switch on and verify that the instrument sequences through all the analog lights and
reads "8888" on the digital display for 3 seconds or less and then switches to "0000." A problem at
this step could be caused by poor connections on the red and/or black leads.
2. Check the digital display backlight. With high or medium ambient light it is hard to see the digital
display backlight (it is only required during low ambient light conditions but should be on all the
time).
3. Start the aircraft engine and allow it to idle with the mag switch on "Both." The digital and analog
display should be reading properly. An engine’s RPM will fluctuate 10 to 20 RPM at low idle. A
problem at this step could be caused by a poor or improper connection on the brown or orange mag
wires. To troubleshoot, connect the brown mag wire to the mag (through an isolator), leave the
orange mag wire disconnected and look for proper operation with the engine at a stable idle RPM.
Then connect the orange mag wire to the mag (through an isolator) and leave the brown mag wire
disconnected. Look for proper operation with the engine at a stable idle RPM.
4. With all wires connected and the engine at idle select "Left" on the mag switch. Check the analog
and digital display for proper operation. A large drop in the RPM for one second is normal. The
microprocessor is switching to the other mag. Do this same test for the right mag. A problem at
this step could be caused by a poor or improper connection on the brown or orange pickup cables.
To troubleshoot see step 3 above.
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Rev. C 9/24/97