IR Question

[KEITH KUHN]

Hello Gang
Keith from Ohio.
2 part Question.
I use the Duo T240 Charger.
When doing my IR check.

I noticed different readings,as I tapped
my IR button 4 different times. In other words
I get 16 different readings.
This is on a fully
charged Batt. Yes the
charger shows readings
On each individual cell.
Does anyone know the
Meaning of this please ?

Question 2
Being that a load is put on the Batt when doing
an IR test, is this a
possibility for the different readings ?

Example 6 5 5 7.
10 6 7 8.
3 5 2 3. 1 1 2 1.

Darned if I know. LOL
Keith Kuhn

 

[Ric B]

I have the same charger, and have noticed a slight variation in IR readings if I checked multiple times. But only by 1 or 2 mΩ. A new battery is always very low and an older battery that is retired is pretty high.

 

[KEITH KUHN]

I have the same charger, and have noticed a slight variation in IR readings if I checked multiple times. But only by 1 or 2 mΩ. A new battery is always very low and an older battery that is retired is pretty high.

Hello There
Yes these batteries are
a bit older, this is why
I am keeping an Eye
on them.
Try to get a reading.
Then tap the IR button
again.wait approx 10 sec
and see if you get a
different reading.
Repeat a few times.
Let me know what you
get. Just Curious
Keith

 

[Mrgs1]

Temperature will make a slight difference too.

 

[KEITH KUHN]

Temperature will make a slight difference too.

Hmmm
OK

 

[Mrgs1]

You'll get better performance from a warmer battery as resistance is lower.
A battery with low internal resistance delivers high current on demand. High resistance causes the battery to heat up and the voltage to drop. ... Temperature also affects the resistance; heat lowers it and cold raises it. Heating the battery will momentarily lower the internal resistance to provide a little extra runtime

 

[KEITH KUHN]

You'll get better performance from a warmer battery as resistance is lower.
A battery with low internal resistance delivers high current on demand. High resistance causes the battery to heat up and the voltage to drop. ... Temperature also affects the resistance; heat lowers it and cold raises it. Heating the battery will momentarily lower the internal resistance to provide a little extra runtime

Wow I caught you just in time.
I just did another flight
and IR check after flight.
All numbers below.
1 - fully charg Batt 16.7
Run Time 5.10 min
V on controller 15v
Brought it down at hover
Because she was starting
to toilet bowl.
Fought to keep it
Stable. Had to land it.
Getting worried,phewww.
Bat V at 15.7 outside of
Drone.
IR. 1 1 1 3
1 1 2 3
Thank God is in one
Piece.
Outside temp 58 & sunny.
Week before that 14 min
Runtime. Go figure
LOL. Keith

 

[Mrgs1]

Wow I caught you just in time.
I just did another flight
and IR check after flight.
All numbers below.
1 - fully charg Batt 16.7
Run Time 5.10 min
V on controller 15v
Brought it down at hover
Because she was starting
to toilet bowl.
Fought to keep it
Stable. Had to land it.
Getting worried,phewww.
Bat V at 15.7 outside of
Drone.
IR. 1 1 1 3
1 1 2 3
Thank God is in one
Piece.
Outside temp 58 & sunny.
Week before that 14 min
Runtime. Go figure
LOL. Keith

Pilot style of flying, wind and conditions, lots of variables I'm afraid I suspect no two flights are ever the same, it's all general information at the end of the day.

 

[Rubik]

Wow I caught you just in time.
Because she was starting
to toilet bowl.
Fought to keep it
Stable. Had to land it.

Toilet bowl can be very serious! My refurb TH was doing it on about half of the flights. On one, it was so bad I almost ran into a car when trying to land. The only fix that seems to work is a new flight controller board. The refurb vendor graciously replaced the flight controller for me, no charge. No problems now. I hope you can get that fixed before flying again.

 

[KEITH KUHN]

Toilet bowl can be very serious! My refurb TH was doing it on about half of the flights. On one, it was so bad I almost ran into a car when trying to land. The only fix that seems to work is a new flight controller board. The refurb vendor graciously replaced the flight controller for me, no charge. No problems now. I hope you can get that fixed before flying again.

Yes
Thank you
I will be keeping a close eye on the situation
Keith Kuhn