Re: Battery for RCM6700

5-years is not that long. How long does the battery in your PC last? 
If you had to replace the battery in your PC every 3-months or so, 
would that be a problem? Besides, our products are sealed and not
meant to be opened by customers. Like Apple products. Open it and 
your warranty is void.

The Rabbit is Ethernet enabled, but our customers keep our products
on private networks that have no access to the outside world. You
wouldn't want some hacker shutting down your satellite TV broadcast
would you? People get real upset when their TV goes off the air.

Rechargeable is also not an option. One, you have to open the box, 
which is a no-no. Two, our customers fear the possibility of 
explosion.

Accurate time and date is important for the logs we maintain. 

It's looking more and more like we are going to have to use a separate
clock device to get reasonable battery life. Something like a PCF8563.
It uses 400na over a temperature range of -40C to +85C. Using a .4AH
lithium coin battery, we can get better than 10-years of life.

--- In [email protected], Phil D <phil.dyke@...> wrote:
>
> I do recall the manual saying something about cycling the power to get
> better RTC current draw performance,
> 5 years is a long time to want the RTC to survive is a rechargeable 3V not
> an option is it realistic that the product will be un-powered for this
> period and require the correct time? as this is a network device NTC may be
> a possibility to explore
> I use a 3V lithium ion that i calculated as 72 days RTC time which is
> suitable for my application as real time isn't essential
> 
> Phil
> 
> On 16 August 2012 20:39, Moore, Robert <robert_moore@...> wrote:
> 
> > **
> >
> >
> > I noticed somewhere in the 6700 manual a REQUIREMENT that you cycle power
> > to the 6700 AFTER attaching the battery. This affects  the drain on the
> > battery . . .
> >
> > bob
> >
> > On Thu, Aug 16, 2012 at 1:45 PM, seecwriter <seecwriter@...> wrote:
> >
> >> That's not a bad choice. But it's half the capacity I need for a
> >> 5-year life, unless I'm over thinking this.
> >>
> >> We may have to go to a separate time-of-day clock device that uses
> >> far less current than the RCM6700's 120ua in order to get the life
> >> span we want with a reasonable size battery.
> >>
> >> Steve
> >>
> >> --- In [email protected], "Moore, Robert" <robert_moore@>
> >> wrote:
> >> >
> >> > On the OP7200 I used a AA 3.6 VDC lithium battery (Saft LS14500CBA or
> >> > equivalent) accessible from the outside of the instrument case using a
> >> > Bulgin 122-BX0011/1 . . .   I'm assuming the RCM6700 has the same pinout
> >> > for this.  My biggest concern was to keep the end-user from opening the
> >> > instrument.
> >> >
> >> > bob
> >> > --
> >> > Robert K Moore, PhD
> >> > Designer, Macular Metrics
> >> > Robert_Moore@
> >> > 401-226-6888
> >> >
> >> >
> >> >
> >> >
> >> > On Thu, Aug 16, 2012 at 12:31 PM, seecwriter <seecwriter@> wrote:
> >> >
> >> > > The battery current draw for the RCM6700 seems rather high, requiring
> >> a
> >> > > large battery to maintain the clock for 5-years.
> >> > > Can anything be done to reduce the battery current? I'm just rying to
> >> > > maintain the time-of-clock.
> >> > > What have others done for a battery?
> >> > >
> >> > > Steve
> >> > >
> >> > >
> >> > >
> >> > > ------------------------------------
> >> > >
> >> > > Yahoo! Groups Links
> >> > >
> >> > >
> >> > >
> >> > >
> >> >
> >>
> >>
> >>
> >>
> >> ------------------------------------
> >>
> >> Yahoo! Groups Links
> >>
> >>
> >>
> >>
> >
> >
> > --
> > Robert K Moore, PhD
> > Designer, Macular Metrics
> > Robert_Moore@...
> > 401-226-6888
> >
> >  
> >
>