[ubuntu-uk] Reverse engineering data files

[Gareth France]

It is a bit more complex than testing an IEC lead many times. That won't 
give all the results and there are a large combination of differing 
settings within the tester.

The results you just plucked out are not correct, but they are damn 
close! They should be:
ID	Earth	Insulation	Load	Leakage	Continuity	Descript
D7785	0.05	>99.99		0.05	0.73	(No result)	Washing Machine
D7786	0.06	>99.99		0.05	0.1	(No result)	Fridge

Also in there may be visual test pass/fail, the rating of the earth test 
(25A, 10A, 100ma) but this is probably stored in that large string. As 
you can see your load results don't quite match up and I can't quite see 
where you got 19976 for the insulation result. The greater than symbol 
is relevant, the result is essentially saying off the scale.

On 26/11/14 07:45, Paul Sladen wrote:
> On Tue, 25 Nov 2014, Gareth France wrote:
>> tell me where the numbers 0.06 and >99.99 are.
>
>    f2 80 05   f3 4e 08   f6 80 49 00 08   f8 80 00  (Washing machine)
>    f2 80 06   f3 4e 08   f6 80 01 00 08   f8 80 00  (Fridge)
>
> If you know the numbers, they are easy to find.  The top bit ('0x80')
> is probably "test passed".  Perhaps you can fill out what the rest of
> the field/function codes:
>
>    01 Visual pass
>    02 Visual fail
>    F0 Overall pass
>    F1 Overall fail
>    F2 (Earth continuity) 0.06 [Ohm x 100]
>    F3 (Earth insulation) 19976 [kOhm]
>    F6 (??) pass 0.01, 0.08 ... (0.73, 0.08 for the other appliance)
>    F8 (??) pass 0.00
>    FB (free form strings) [4 * 21-characters]
>
> I think at this stage the example file can now be fully decoded now
> (closer to 80 minutes than 8 years and we can be thankful that writing
> these emails took longer!).  If you want to help produce more example
> data, don't wait for new jobs, just re-test the same IEC lead one
> hundred times with different menu items/tests selected and keep a
> corresponding note of what values are shown on the display with that
> menu item selected.
>
> Alternatively work out how to get you, I, the tester and a handful of
> resistors in one place for a couple of hours.
>
> 	-Paul
>
>