AV-Mag External Magnetometer - Installation, Configuration, & Calibration

Install Equipment Needed

he AV-Mag is designed to be easy to install and configure. The performance of the AV-Mag is dependent on the condition of the systems of the host aircraft. The AV-Mag will not meet the performance specification if the host aircraft systems are not in good working order.

• Camp Compass - What affects the magnetic compass will affect the magnetometer
• Non-magnetic screwdriver and wrench should be used for installation - Using a magnetic screwdriver may cause issues with the AV-Mag but it won’t ruin it. Other units are not that way. 
• Brass fasteners
• Non-magnetic digital level
• Use new wiring - M27500 3 conductor 22AWG wire
• AV-30 Installation Manual / Wiring diagram 

Where to mount the AV-Mag?
This is different aircraft to aircraft.

Considerations

• Existing wiring
• Lighting
• Motors
• Steel control cables
• Pitot Heat
• ELT
• Anything electronic, steel, or loose or coiled wiring

**Mount as close to the angles of the AV-30 in the panel as possible

*Up to 4 AV-30s can be connected to the AV-Mag.

*Parallel just the Brown (Pin 6) and Black (Pin 10) wires to the other AV-30s. 

 AV-Mag Orientation

Configuration of the AV-Mag

• Enter the install menu
• Serial 4 - set to AVMag
  • Once set you will have a MAGCAL flag
  • If you have a NOMAG flag then something is not communicating. (troubleshooting)
• Install menu steps to be completed
  • interference check
  • orientation
  • angles
• Calibration to be completed

Calibration of AV-Mag

• Compass Rose not needed
• Only need to know North
• Orient aircraft to North Press “Next”
• The AV-30 will give you a countdown of 30 degrees.
• Once 0 is shown then Click “Next” 
• Continue this until all 12 points are completed. 
• Once completed check all headings and make sure they are indicating correctly. 
• If the heading is off the same amount at every point then you will need to rotate/shim the AV-30 more closely to the line of flight. 

**EACH AV-30 must have the configuration, installation, and calibration completed.

Interference Check

The interference range indicates fluctuating magnetic fields which will negatively impact calculated magnetic heading values, so a good installation requires this range to be as small as possible. If the range is greater than 10%, attempts should be made to re-site the AV-Mag location or to mitigate interferers.
 

Possible Interference:

Lights:

Landing 

Taxi 

Strobe 

Recognition

All Lights

Avionics:

Comm Radio

GPS

USB Charger

IPad

Tools in Bagage compartment

Controls:

Aileron

Rudder

Elevator

Flaps

Other:

Landing Gear

Speed Brakes

Autopilot Engage

Pitot Heat

Air Conditioner

Blowers

Over braid for shielding for extra protection

Over wiring varglas protection for wiring route to eliminate potential of interference into the wiring?  

Bonding Braid: https://www.awcwire.com/product/aa59569r36s0375