Figure 3-1 Ammeter Placement For Current Measurements - Garmin G5 Installation Manual

Figure 3-1 Ammeter Placement for Current Measurements

7. Ensure all circuit breakers are closed.
8. Apply external power to the aircraft. The voltage of the power source should be set to the
nominal alternator voltage (usually 13.8 VDC or 27.5 VDC).
9. Turn on the battery master switch.
NOTE
Intermittent electrical loads are not measured. It is assumed if additional current is required
beyond what the alternator can supply, this short-duration demand will be provided by the
battery.
10. Set the lighting as described below. These settings will be used for every current measurement
which follows:
o All instrument panel and flood lights should be set to maximum brightness.
o Any displays with a backlight should be set to 50% brightness
11. Using the tabulation completed above, switch on all continuous electrical loads used for the taxiing
phase and record the current measured by the ammeter (measurement (a) in Figure 3-3). The
autopilot circuit breaker (if installed) should be closed, but the autopilot should not be engaged.
WARNING
Pitot heat should be switched on only long enough to take the current measurement and then
switched off to avoid injury to personnel or damage to the Pitot tube.
12. Using the tabulation completed above, switch on all continuous electrical loads used for the
normal takeoff/landing phase and record the current measured by the ammeter. Measurements
must be taken with the landing lights ON and OFF (measurements (b1) and (b2) in Figure 3-3).
13. Engage the autopilot (if installed).
Garmin G5 Electronic Flight Instrument Part 23 AML STC Installation Manual
Page 24 of 53
190-01112-10
Rev. 2