October 25, 2018 at 11:36 am #13460
I am bench testing a dual battery Mauch system with a Pixhawk 2 (hexacopter). The percentage bar is dropping quickly and I am not flying. I have AMPS and VOLTS added together and divided by 2. I had the AMPs just added together but it didn’t seem right so I changed it. What am I missing?October 26, 2018 at 3:14 pm #13502
If you have your ESCs on, that would drain the battery.
Make sure you follow this:
You can calculate the total setting for Batt1 monitor in MissionPlanner:
Voltage divider = (Voltage divider sensor 1 + Voltage divider sensor 2) / 2
Amp/ Volt = Amp/V Sensor 1 + Amp/V Sensor 2November 2, 2018 at 12:15 pm #13534
The volt sensor adds up to around 124 volts? It doesn’t seem right? (125.48076 v) Do I divide the voltage?November 2, 2018 at 1:29 pm #13536
could you send me the calibration values from your sensors, or alternatively the serial numbers?November 2, 2018 at 4:19 pm #13538
So in Mission Planner you need to use:
Voltage divider: 26.77749
Amps per Volt (A/V): 125.48076
The Pixhawk expects a voltage on its analog input that represents the current read by the sensors. For example, if the current sensors report 2V to the Pixhawk, that actually means that the current measured by the sensors is: 2V x 125.48076 A/V = 251 AmpsNovember 5, 2018 at 11:51 am #13549
First test flight has very poor results with percentage bar plummeting resulting in 5 minute flight. I usually get 26 minutes from this setup. Not sure why due to following the above instructions. I am using Pixhawk 2 with Mauch Dual Power system.
Here is the flight video:
Here is pic of battery percentage after flight:
Please let me know if you have ideas or if you need flight logs.November 6, 2018 at 7:14 pm #13559
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