[volt-nuts] Solartron 7061 ROM and behaviour questions (was help request (eeprom?))

[Fabio Eboli]

Little update: tried shorting SP2 jumper but the meter
stops reading DC volts, like if the input is disconnected,
no more tests on this, I disconnected the jumper like as before...
strange ?

Fabio.

"David C. Partridge" <david.partridge at perdrix.co.uk> ha scritto:

>> SP1:2716 SP2:2732/64, the instrument mounts 2764 roms and the
>> corresponding jumper SP2 is full of solder,
>> but not jumped correctly, SP1 is not soldered.
>
> SP2 should be jumpered with solder for 2764 ROMS, and SP1 should be  
> open circuit.
>
> So that is correct.
>
> Dave
> -----Original Message-----
> From: volt-nuts-bounces at febo.com [mailto:volt-nuts-bounces at febo.com]  
> On Behalf Of Fabio Eboli
> Sent: 03 March 2012 13:29
> To: volt-nuts at febo.com
> Subject: [volt-nuts] Solartron 7061 ROM and behaviour questions (was  
> help request (eeprom?))
>
> Hello everybody,
> I've some questions for who has the solartron 7061 and/or can help:
> 1- behaviour: is it normal to have measurement "noise" on last digit?
> measuring a lithium battery and a geller labs voltage source i get  
> the reading jumping usually +-3 +-4 counts on last digit, less  
> frequently
> 6-7 digits or 1-2 digits. Range 10V, 7 digits, filter on.
> 2- ROM: I tried download ROMs content. I don't trust the (willem)  
> programmer I used, since it's from a friend of mine and I don't have  
> experience with it.
> I'd like to verify the ROMs content I download if are correct.
> Now on the labels there is the model number and a 4 alphanumeric  
> code, is this checksum? What kind of algorithm should it be?
> 3- Jumper config: I noted a strange thing, that maybe is non  
> significant, on the side of IC804 rom on analogue board there are  
> soler-jumpers SP1 and SP2 marked
> SP1:2716 SP2:2732/64, the instrument mounts 2764 roms and the  
> corresponding jumper SP2 is full of solder, but not jumped  
> correctly, SP1 is not soldered.
> Should this jumper be solder-closed?
>
> Thanks,
> Fabio.
>
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