[volt-nuts] 7061 On Board Clock and Battery

[Fabio Eboli]

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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