[volt-nuts] 7061 On Board Clock and Battery

[Fabio Eboli]

> I'll investigate the statistics function after I make sure it is 'in range'
> as far as the calibration goes.

Ok, thank you.

>
> I don't understand 'SP1 and SP2 on floating board are both open circuit'.
> To what does this refer?

In this photo, low center (sorry, it's an out of focus area) on the
right side of the last eprom there are two solder jumpers, that
should select the eprom size used. The manual says that one of the
two jumpers has to be closed to select 2716 or 2764. In mine both
are open and if I close the right one (dont remember if SP1 or 2)
my meter stops working correctly.

Fabio.

>
> Thanks.
>
> Joe
>
> -----Original Message-----
> From: volt-nuts-bounces at febo.com [mailto:volt-nuts-bounces at febo.com] On
> Behalf Of Fabio Eboli
> Sent: Monday, June 25, 2012 10:54 AM
> To: Discussion of precise voltage measurement
> Subject: Re: [volt-nuts] 7061 On Board Clock and Battery
>
> Interesting, these roms are mine's:
> http://www.ko4bb.com/Manuals/04)_ROM_Images_and_Drivers/Solartron_7061_ROMs.
> zip
>
> I have also a problem with statistics,
> seem that the standard deviation calculation is
> wrong:
> http://www.febo.com/pipermail/volt-nuts/2012-April/001793.html
> If you have time to test yours for this I would be grateful.
>
> Another thing is that on mine SP1 and SP2 on floating board are both
> open circuit.
>
> Fabio.
>
> "J. L. Trantham" <jltran at att.net> ha scritto:
>
>> Fabio,
>>
>> Thanks for the link to the pictures.  I never seem to remember eevblog
> when
>> it comes to looking for stuff.
>>
>> Your pictures show that your Earthy board is completely different from
> mine
>> in the area of 'B101'.  You have no place for B101.  Also, your Floating
>> board is different in that you have the 'CA' firmware and 28 pin EPROM's.
> I
>> wonder if anyone has modified my 'version' of the Floating board to use 28
>> pin EPROM's and if there would be any utility to doing this.
>>
>> I did not get a message directly from you (that I recognized at least).
>> I'll try to send you one directly to make sure we can 'establish
>> communications'.
>>
>> Joe
>>
>> -----Original Message-----
>> From: volt-nuts-bounces at febo.com [mailto:volt-nuts-bounces at febo.com] On
>> Behalf Of Fabio Eboli
>> Sent: Monday, June 25, 2012 5:14 AM
>> To: Discussion of precise voltage measurement
>> Subject: Re: [volt-nuts] 7061 On Board Clock and Battery
>>
>>
>> Here are some pics of the mine, only one battery:
>>
> http://www.eevblog.com/forum/product-reviews-photos-and-discussion/solartron
>> -7061-help-and-come-photos/msg93650/#msg93650
>>
>> As for the manual I did try to contact you directly,
>> did you read the message?
>>
>> Fabio.
>>
>> "J. L. Trantham" <jltran at att.net> ha scritto:
>>
>>> My 7061 has a single battery installed, B501, a 3.6 V Ni-MH
>>> Rechargeable 3 pin battery.  My 7081 has two batteries installed, the
>>> same 3.6 V Ni-MH Rechargeable battery and a ½ AA Lithium Battery that
>>> serves as the onboard clock backup battery.  It is connected with its
>>> negative pin to a 47K resistor to ground and its positive pin to a
>>> diode that feeds a connection that is also fed by another diode from
>>> the main power supply.  The common connection of these diodes feed the
>>> clock chip.
>>>
>>>
>>>
>>> On my 7061 there is a location, B101 that appears to be for the same
>>> type ½ AA Lithium Battery.  The + pin connects to a diode, in a manner
>>> similar to that described above, and the – pin connects to a ‘space’
>>> for a resistor, R117, with the other end of the resistor going to
>>> ground.  Both the battery, B101, and the resistor, R117, are missing.
>>>
>>>
>>>
>>> My questions are:
>>>
>>>
>>>
>>> 1.	Does anyone have a 7061 with this battery and resistor installed?
>>> 2.	If so, what is the value of the resistor, R117, and what type is the
>>> battery?
>>>
>>>
>>>
>>> It seems that this would be an easy addition to get a live clock
>>> without the need to restart the clock each time the meter is turned
>>> on.  Or, perhaps there is a reason why this in not a good idea.
>>>
>>>
>>>
>>> Thanks in advance.
>>>
>>>
>>>
>>> Joe
>>>
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