I just received my Misco 7084VP. This thing works great and the LED light battery was still good. This is orders of magnitude better than the autozone piece of crap. It only takes a small drop of electrolyte to take a reading. Here's some more info about its operation,
I couldn't find the users manual however. They said it was at their support site (which is under construction). Does anybody have the manual in PDF?
> From:
[hidden email] <
[hidden email]>
> Subject: Re: [EVDL] Favorite Battery Hydrometer?
> To: "Electric Vehicle Discussion List" <
[hidden email]>
> Date: Thursday, November 5, 2009, 1:14 PM
> Roger,
> Thanks for all the great information!
> I bought one from Autozone and it was pretty much useless.
> I figure for $10 I can't go wrong.
> This one has an orange body, so it must be a newer meter.
> Thanks again,
> Rod
>
> --- On Thu, 11/5/09, Roger Stockton <
[hidden email]>
> wrote:
>
> > From: Roger Stockton <
[hidden email]>
> > Subject: Re: [EVDL] Favorite Battery Hydrometer?
> > To: "'Electric Vehicle Discussion List'" <
[hidden email]>
> > Date: Thursday, November 5, 2009, 12:49 PM
> >
[hidden email]
> > wrote:
> >
> > > I just bought this one "Glycol & battery
> tester
> > misco products 7084VP"
> > > for $10 bucks including shipping, item #
> 190345335169
> > after
> > > getting some info from the list. hopefully it
> > works?
> >
> > $10 is a steal for this instrument! Be sure to
> check
> > the calibration by placing a drop of distilled water
> on the
> > measuring window and adjust the screw on the bottom of
> the
> > instrument until the freezing point reads +32F.
> >
> > Misco states that the instrument undergoes a 2 point
> > calibration at the factory, but as far as I can tell
> the
> > only thing you can do in the field is the
> single-point
> > calibration described above. If you have access to
> > electrolyte of a known SG, or to anti-freeze of a
> known
> > freezing point, you should also check that the
> instrument
> > reads accurately somewhere else on the scale after
> adjusting
> > the 'zero' point.
> >
> > We have several of these that we use in our
> battery/charger
> > testing and have had one that went out of cal such
> that it
> > was inaccurate at high SG despite being accurate at
> > 1.000/+32F with distilled water.
> >
> > To get a nice crisp indication on the scale, it is
> > important to keep the sample window clean. You must
> > wipe it dry between samples, and if you notice that
> the line
> > between the light and dark portions of the screen is
> "fuzzy"
> > instead of crisp when taking a reading, then clean
> the
> > sample window and the cover with isopropyl alcohol.
> >
> > You may also find that the battery in the sample cover
> has
> > died. You can order a replacement cover (the
> battery
> > is sealed inside it and is non-replacable) from Misco
> and
> > change it yourself if you wish. The red LED
> > illumination really does make the scale easier to
> read, but
> > in a pinch you can get away with just pointing the
> 7084 at a
> > light source while reading it (it may help to remove
> the
> > label from the viewpoint cover to let more ambient
> light
> > through if you need to use it without the battery).
> >
> > Lastly, I hear that the red-bodied version of these is
> an
> > older model and is less accurate than the newer
> > orange-bodied version. I believe yours would have
> to
> > be several years old if it isn't orange-bodied.
> >
> > Cheers,
> >
> > Roger.
> >
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