Eagle Tree Vector - Manual (Page 60)

USER GUIDE
60
To be able to see when an alarm has triggered, you must have the numeric readout for it displayed, so
that you can see it flash.
5.14.7.1 Low Pack Voltage Alarm
The alarm for pack voltage is set by specifying the per cell voltage that will trigger the alarm. The Vector
automatically detects the cell count for your pack, so you can switch between packs of different cell counts,
without needing to reset the alarm each time.
5.14.7.2 Low Video Transmitter Voltage Alarm
If you use a separate video battery, you can set the alarm for that (in total volts rather than cell volts).
5.14.7.3 Low milliamp-Hours (mAH) Remaining Alarm
When enabled, this alarm will trigger when the remaining mAH in your main pack falls below the specified
percentage. For example, if you want the alarm to trigger when only 20% of your pack’s charge remains, set
this to ‘20’. Note that you must correctly set the total mAH for your pack for this alarm to work.
5.14.7.4 High Barometric Altitude Alarm
When enabled, this alarm will trigger when the altitude of your model above the takeoff point exceeds the
specified barometric altitude.
5.14.7.5 Distance to Pilot Alarm
This alarm will trigger when the horizontal distance between the home point and the model exceeds the
specified value. Note that this alarm is always programmed in either feet or meters (not miles or kilometers).
5.14.7.6 Speaking Alarm Values
If the option is enabled, when an alarm occurs the OSD will make an alert sound, and read off the name and
present value of the readout that is in an alarm condition.
5.15 Configuring and Calibrating the Magnetic Compass
5.15.1 Using the Compass with Fixed Wing Airframes
The magnetic compass built into the GPS/Mag is automatically disabled for fixed wing airframes, and
automatically enabled for multirotors.
For fixed wing airframes, using the compass offers these benefits:
 The magnetic compass operates even if the model is moving slowly, or not at all. If RTH is triggered
downwind, and the wind is so strong that the model is moving very slowly toward home, or even losing
ground, the GPS course readout may not be accurate, which could cause the RTH system to not be able to
identify the direction to home without the compass.
 Loiter and RTH circling modes may be more precise
 The compass reading can be used for easy determination of the “RADAR Up Direction” or the EagleEyes
tracker’s “0 degree pan” settings.
However, if you decide to use the compass with fixed wing, it’s very important that the mounting, installation
and calibration guidelines for the GPS/Mag are followed, or the compass can make things much worse!
To enable the compass for fixed wing, navigate to the “Calibration and Sensor Setup” menu from the main
menu, and change “Enable Compass/Magnetometer” to “Yes”.