M2 Multi

Automatic Activation Device (AAD) M2 Multi is an electronic device, operating on the principle of pressure reading. The primary means of detecting the altitude and fall rate is a pressure sensor. The altitude is calculated based on the difference between the two atmospheric pressures. The pressure at current altitude and pressure on landing location “GROUND ZERO”. The pressure on the landing location is measured and set after switching on the device during calibration. This pressure is automatically adjusted by a change in barometric pressure during the day without the need for user intervention. The m² multi checks the ambient barometric pressure every 32 seconds and it determines whether the aircraft has taken off. If yes, it begins to monitor the skydiver’s altitude and fall rate. The pressure sensor measures the atmospheric pressure 8 x per second in free fall.

The information collected is evaluated by means of a microprocessor and ingenious software and it is converted to a real fall rate and altitude. Thanks to this, the m² multi-device is capable of meeting the preset criteria of fall rate in combination with altitude above the landing location, cut the reserve parachute closing loop by means of the cutter and thus initiate the deployment sequence.

The device is activated only in the case the preset criteria are met; the criteria differ depending on the set profiles – STUDENT (Stu), INTERMEDIATE (Int), PROFESSIONAL (Pro), CANOPY PILOTING (Cpi) and TANDEM (Tan)

STUDENT (Stu) The STUDENT profile is designed for basic training of students and AFF. It is activated when the height above the landing location is lower than approx. 330m / 1100 ft and fall rate is higher than approx. 13 m/s (29 mph). The altitude lock opens at approx. 450m / 1475 ft. The device does not activate when below approx. 60m / 195 ft. The activation zone is thus in the range of approx. 330m to 60m / 1100 ft to 195 ft above the landing location. Warning: The speed of approx. 13 m/s (29 mph) may be also reached with a fully functional parachute! If the student skydiver does not go on with the jump and lands onboard the aircraft, switch off the M2 Multi device always in the STUDENT setting. If this is not possible, the aircraft must not descend faster than approx. 13 m/s (29) mph.

INTERMEDIATE (Int) The INTERMEDIATE profile is designed for basic training of advanced students and AFF. It is activated when the height above the landing location is lower than approx. 330m / 1100 ft and fall rate is higher than approx. 20 m/s (45 mph).  The altitude lock opens at approx. 450m / 1475 ft. The device does not activate when below approx. 60m / 195 ft. The activation zone is thus in the range of approx. 330m to 60m / 1100 ft to 195 ft above the landing location. It is the recommended setting for students after completing the first ten jumps. It is solely upon the decision of the instructor to determine the setting and suitability of its use for a particular student. Warning: The speed of approx. 20 m/s (45 mph) may be also reached with a fully functional parachute! If the student skydiver does not go on with the jump and lands on board the aircraft, switch off the m2 multi device always in the INTERMEDIATE setting. If this is not possible, the aircraft must not descend faster than approx. 20 m/s (45 mph).

PROFESSIONAL (Pro) The PROFESSIONAL profile is the most commonly used setting of the device. Is designed for experienced skydivers. It is activated when the height above the landing location is lower than approx. 270m / 885 ft and fall rate is higher than approx. 35 m/s (78 mph). The altitude lock opens at approx. 450m / 1475 ft.  The device does not activate when below approx. 100m / 330 ft. The activation zone is thus in the range of approx. 270m to 100m / 885 ft to 330 ft above the landing location. Warning: The speed of approx. 35 m/s (78 mph) may be also reached with a fully functional parachute!

CANOPY PILOTING (CPi) The CANOPY PILOTING profile is primarily intended for the Canopy Piloting sports discipline. The profile is used only for the most experienced pilots with extremely quick parachutes and vast experience. It is activated when the height above the landing location is lower than approx. 270m / 885 ft and fall rate is higher than approx. 45 m/s (101 mph). The altitude lock opens at approx. 450m / 1475 ft. The device does not activate when below approx. 150m / 490 ft.  The activation zone is thus in the range of approx. 270m to 150m / 885 ft to 490 ft above the landing location. Warning: The speed of approx. 45 m/s (101 mph) may be also reached with a fully functional parachute!

TANDEM (TAn) The TANDEM profile is designed for tandem kits. It is activated when the height above the landing location is lower than approx. 610m / 2000 ft and fall rate is higher than approx. 35 m/s (78mph). The altitude lock opens at approx. 900m / 2950 ft.  The device does not activate when below approx. 100m (330 ft). The activation zone is thus in the range of approx. 610m to 100m / 2 000 ft to 330 ft above the landing location.

For more information and manuals go to the manufacturer page here.