Author Topic: turnigy/doc wattson cumulative readings  (Read 1183 times)

0 Members and 1 Guest are viewing this topic.

defed

  • Sr. Member
  • ****
  • Posts: 493
turnigy/doc wattson cumulative readings
« on: February 14, 2011, 04:49:08 PM »
does anyone know when the meter 'turns' over its cumulative readings?  i have a turnigy (presume the wattson does the same?), and last night, i was at 4600Wh.  we had some serious winds over night and thru the morning, and i checked the meter this afternoon and it says 91Wh.  it appears that i maxed it out and it flipped back to 0....but what is the max reading before the reset?

from the instruction sheet, i see this:

Measures 0-130A, resolution 0.01A
               0-60V, resolution 0.01V
               0-6554W, resolution 0,1W
               0-65Ah, resolution 0.001Ah
               0-6554Wh, resolution 0.1Wh

to me, this means that the 1st 3 are max instantaneous readings, while the last 2 are cumulative, then it flips to 0?  my Ah zeroed a long time ago, but don't recall what it was at.  thought it was a glitch actually and didn't really care as i tend to look at max Wh instead of Ah.  6554Wh seems like it could be correct if i made 2kwh...my high reading for the period was over 400w at 14a (4' piggott).

if anyone can confirm or correct this, it would be appreciated.  thanks!

Dave

joestue

  • Hero Member
  • *****
  • Posts: 1764
  • Country: 00
Re: turnigy/doc wattson cumulative readings
« Reply #1 on: February 14, 2011, 08:02:49 PM »
it probably starts at zero after 6553.6 wat hours.
its just 2^32
My wife says I'm not just a different colored rubik's cube, i am a rubik's knot in a cage.

commanda

  • Hero Member
  • *****
  • Posts: 731
Re: turnigy/doc wattson cumulative readings
« Reply #2 on: February 14, 2011, 08:26:27 PM »
2^32 = 4294967296

whereas

2^16 = 65536

So your highest reading would be 6553.5 WHrs.
It's one less than 65536 because it starts at zero (not one).

Amanda

defed

  • Sr. Member
  • ****
  • Posts: 493
Re: turnigy/doc wattson cumulative readings
« Reply #3 on: February 15, 2011, 05:28:44 AM »
thanks!