Need Large display DMM for biasing amps

Rwwear
Thanks... I'm seeing several online at various sites but I'm wondering if the info being sent to the PC isn't past tense info... I would need real time, "right now" feedback viewable as it changes on the screen...

I did glean the triplet, and Fluke cust service #'s late last night so I'll be in touch with them Monday.

Guidocorona
Whoa. Thanks very much.
The only talking meter I've seen anyone talking about online, was one made by Omega, and is now out of production. In fact there was a blog by one buyer who had issues upon receipt of his and he let it slip he was visually impaired (not knowing that would matter), and Omega would not repair the unit for him and insisted on him ONLY returning the meter to them.... as Omega said the "talking meter" was not intended for use by blind, or visually impaired people, as such use posed a hazzard to the user... and apparently, Omega wanted no part of it at all.

I will start calling those numbers Monday and see what's up with what. thanks again.

In microbiology labs, "Quebec Colony Counters TM" used to be used to quantify microbial colonies on agar plates. These simply provided a backlit grid over which a petridish was placed. Above the dish a magnifying lens was suspended. I'm guessing, but magnification is on the order of 10X??? (don't have access to one at the momment. Would some sort of mounted magnifying lens help with visualization of read out from a conventional meter?

CA

Sounds good BlindJim, let me know how the quest goes. . . there are many ways to skin this particular cat. Ghosthouse, yes there are dedicated magnifying lenses and mono/binoculars for visually impaired people. Problem with magnifying lenses is that they tend to distort the image. A better solution may be to place the display of a regular DMM under one of the many electronic magnifyiers for VIPs available from such companies as Humanware, Freedom Scientific, Optalek, Guerrilla Technologies and so forth. These things used to be Huge, but now they are sometimes smaller than a paperback book and are quite flexible in their applicability.

Ghosthouse
yes. Either 1.5 inch characters are the now need... or some other gizmo is necessary.... and I may have one that I had not thought of lately as it sees such little use..

Guidocorona is right. As magnification increases the field of view diminishes... and distorts some as well. usually it will remain legible or at least intelligible... enough. Under severe mag, as the field size drops you can end up getting down to just one character, or even a portion of it. So be it.

That is truly not too much the issue... the issue is hands free determination of the integers being displayed... as one hand is busy holding the bias switch, and the other turning the screwdriver.

I recently acquired an "AMIGO" portable blower-upper. Rechargeable battery powered. Super huh? Nope.

No good. Why?

The back light of the meter itself. It blinds the CCD chip inside the AMIGO and covers the area with a big spot which hides the numbers… but it’s a fine device for non back lit things… and costs about the price of a nice sub, or good DAC. >$1500.

The current RAT SHAK meter numbers are about 0.5 or 0.6 in tall.... and if the light weren't on when the meter is on, I'd have a shot then.

But hey, it's nothing but a thing. It'll all work out. It always does. I just gotta do some serious leg work and seek another path. Nuttin' to it.

... and a large read out I think is the ticket. I got enough beeping, booping, buzzing, and talking stuff around here already.

Just for closure... and the benefit of those whose eyeballs have seen better days.

I pursued all of the listings posted previously in this thread... many to no avail. Although I am grateful for each and every one of them BTW.

By doing some surfing and countless Google searches, as well as receiving the input of some other members offline, (thanks Tim & Chris), i found some nifty gizmos for digitally measuring electrical values, and some other values pertinent to audio.

For a simple inexpensive unit, Triplett has a large display DMM which has 1+ inches tall characters, some sites say 1.5, but the maker says 1.15 inches. Period. Model 9005 & 9015. Neither are Auto ranging, nor will they interface with a PC.

Fluke also has a few models which allow for disabling the back lighting function which will be of immense value if a CCTV is used to read the numbers. The 80 series models namely the 87v at $350 list.

Fluke also has an RS 232 (USB) INTERFACE ON SOME MODELS. One 'All in one' package item is the model # 189 FVF2. it comes complete with all the needed cables, and software necessary to get the info from the portable DMM into the PC and either log it all for reference, or see it in real time! The price tag is $500. it also does far, far more than what you might expect from a DMM. The Fluke also has the best accuracy of those listed here.

Extech MM560 is yet another handheld which does nearly all the Fluke 189 FVF2 does BUT comes in at a lesser tag, of $319. The Txtech also provides real time results via the PC.

Still available are LED read out meters which do consume more energy than the LCD types, yet have higher contrasting displays. many of these are bench models, though some do have self contained power sups for portability. TTi an English co. offers a model 1604 bench type with red LED display.

There are far more units that will aid those with limited visual skills or whose eyes aren't what they used to be. it will depend upon your specific needs which choice you may make.

My persoanl solution came via a Jordy II portable head set with docking station. I used it briefly as a portable unit. in it's current state of use as a standard CCTV, it serves the purpose... and one last 'trick' if using a CCTV with back lit DMMs, turning off the light (if possible) on the CCTV being used may help defeat the glare the back lit meter produces. Some other ambient light may well suffice.

Thanks for all the help folks.