EMAXplus™ monitoring

EMAXplus™ will monitor engine and electrical bus data and provide aural and visual signaling for certain critical and abnormal conditions.

The listed conditions are continuously monitored. All conditions will be indicated by tone and visual indication (CAUTION or MESSAGE flashing). The message is then announced on pilot request (ACK/REQ/SETUP button). Until the message has been played, the tone repeats every 60s. CAUTION remains on steady as long as any condition continues.
The pilot can request the information to be announced by pushing the panel mounted button.

How does it work?

EMAXplus™ reads the engine and electrical bus data measured by the Avidyne EMax system’s SIU or DAU computer. If installed in SIU aircraft it also converts the data to DAU  format which is readable by both MFD and PFD, utilizing the enhanced capabilities normally only available in later Avidyne Entegra DAU based installations. At the same time, knowing the electrical and engine parameters, EMAXplus™ is able to provide additional monitoring with voice messages and aural as well as optical signaling.

Parameter Condition ON Condition OFF
Oil Temperature at or above 240°F at or below 235°F
Oil Pressure at or below 10 PSI at or above 15 PSI
CHT High any CHT above 400°F for 5s all CHTs below 380°F
Engine Ready Oil Temperature
at or above 100°F
below 95°F or (RPM > 1500 and Oil > 100°F)
Engine Not Ready OILT < 100°F & RPM > 1000 (2s) OILT ≥ 100°F or RPM < 950
ALT1 Load at or below 1 A for 20 s at or above 4 A
ALT2 Load at or below 1 A for 20 s at or above 4 A
EBUS Low Voltage at or below 24.4 V DC at or above 26.4 V DC
MBUS Low Voltage UMBUS at or below 24.4V for 20 s at or above 26.4 V
High Voltage UMBUS or UEBUS above 30 V for 20 s both below 29 V
ALT1 High Load AMP1 above 50A for 5 s AMP1 below 45 A
ALT2 High Load AMP2 above 13A for 5 s AMP2 below 10 A
Data Missing no valid SIU/DAU data for 5 s SIU/DAU data resumed
Fuel Timer every 8 gallons (after reset) ACK
PITOT Caution Pitot OFF & OAT ≤ 5°C for 5 s Pitot ON or OAT above 8°C
PITOT On Check Pitot ON & OAT ≥ 8°C for 5 s Pitot OFF or ACK
TKS Activation every 15 minutes of TKS pump activation [t = (tNORMAL+2* tMAX)] ACK