Cruzinchris
Pre-takeoff checklist
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- Jul 18, 2017
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Cruzinchris
I got a used one that I am going to install in my plane. It needs a "keep alive" voltage. This could be provided by a "hot" lead from the battery, fused of course. This would be a long run for my plane. There is presently nothing on the panel that is not activated by the master relay.
The other way is the M800 can be ordered with a battery for keep alive. Mine doesn't have it. I've done some test and the keep alive needs to be at least 8 volts. I put a 9V battery on it and it works okay, but over the past week the voltage is dropping and it projects to go below 8V in months.
Ideas:
Build a charge circuit to top off a rechargeable battery when the master is on. Hesitant to use lithium because of the fire hazard. Revert to Nicd? Any other thoughts?
The other way is the M800 can be ordered with a battery for keep alive. Mine doesn't have it. I've done some test and the keep alive needs to be at least 8 volts. I put a 9V battery on it and it works okay, but over the past week the voltage is dropping and it projects to go below 8V in months.
Ideas:
Build a charge circuit to top off a rechargeable battery when the master is on. Hesitant to use lithium because of the fire hazard. Revert to Nicd? Any other thoughts?