[time-nuts] HP 53131A - reset security code

[Mod Mix]

Hi Bob,

to enter calibration the bottom <Scale & Offset> is to be pressed during 
power on.
In my case, CAL SECURE is displayed and after the next push on <Scale & 
Offset> the display reads: CODE:    0.
Using left arrow it makes up to 7 zeros to appear... - quite a lot of 
options to try it manually... even more pushes needed as e.g. 4 is 
reached be 4-times up arrow...
Still hoping to learn the secret procedure.

I've tried several figures (among them 53131 as said in the manual or 
the number printed on a paper lable sticking on the display)...
Neither Serial number nor date code is working - always: BAD CODE.

Nevertheless: thanks!
Ulli

Am 24.12.2014 um 03:04 schrieb Bob Camp:
> Hi
>
> I believe you will find that when you do the cal it will ask you:
>
> Security yes/no?
>
> (answer yes)
>
> Enter your key?
>
> (enter a random number)
>
> Enter your key again?
>
> (re-enter random number)
>
> Security enabled.
>
> No, that is not a direct quote of what happens. It’s purely a guess based on the process used on other gizmos.
>
> Yes, there pretty much *has* to be a “wipe the memory” command somewhere. I would not find it surprising if the answer involves a trip back to HP for service. I doubt they will do much on a 53131 now that they have killed off support.
>
> What to do:
>
> 1) Try the usual guesses 123, 1234 etc.
>
> 2) Try the end of the serial number on the counter
>
> 3) Try 53131
>
> Again - only a guess. It does fit the given information - no magic code listed anywhere / Magic code does exist.
>
> Bob
>