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Products => Test Equipment => Topic started by: Elektrongeek on March 11, 2013, 05:46:24 pm

Title: Vintage multimeter : AOIP Multipréci Mn5121
Post by: Elektrongeek on March 11, 2013, 05:46:24 pm
Hi.
Last year my teacher gave me a couple of bench Multimeter. :)
My school didn't want them anymore because the power switch was broken.  :(

So I bring them back home and I have repaired them.
So now I would like to share some pictures from inside the Multimeter.

Let's start by the faceplate and screen. 

Here the AOIP next to my fluke 83 series 1  <3 :-DMM
(http://img689.imageshack.us/img689/1956/img20130311155732.th.jpg) (http://img689.imageshack.us/img689/1956/img20130311155732.jpg)

The screen.
(http://img607.imageshack.us/img607/643/img20130311155750.th.jpg) (http://img607.imageshack.us/img607/643/img20130311155750.jpg)

Mains measurement.
(http://img26.imageshack.us/img26/4452/img20130311160131.th.jpg) (http://img26.imageshack.us/img26/4452/img20130311160131.jpg)

Fuses.

(http://img694.imageshack.us/img694/2125/img20130311160404.th.jpg) (http://img694.imageshack.us/img694/2125/img20130311160404.jpg)

The back with mains plug.

(http://img560.imageshack.us/img560/2475/img20130311160519.th.jpg) (http://img560.imageshack.us/img560/2475/img20130311160519.jpg)

The mains fuse.

(http://img845.imageshack.us/img845/395/img20130311160658.th.jpg) (http://img845.imageshack.us/img845/395/img20130311160658.jpg)

Oh a date code .

(http://img202.imageshack.us/img202/287/img20130311160559.th.jpg) (http://img202.imageshack.us/img202/287/img20130311160559.jpg)
1983 This thing is way older than me !

On the bottom 4 screws.

(http://img248.imageshack.us/img248/1994/img20130311160730.th.jpg) (http://img248.imageshack.us/img248/1994/img20130311160730.jpg)

Good quality screws.

(http://img838.imageshack.us/img838/3424/img20130311160813.th.jpg) (http://img838.imageshack.us/img838/3424/img20130311160813.jpg)

And we are inside.

2 boards one for the transformer and the other one for the multimeter part.

(http://img69.imageshack.us/img69/4246/img20130311160938.th.jpg) (http://img69.imageshack.us/img69/4246/img20130311160938.jpg)

Here you can see the tiny transformer and the bridge rectifier .

(http://img836.imageshack.us/img836/1841/img20130311161028.th.jpg) (http://img836.imageshack.us/img836/1841/img20130311161028.jpg)

And the motherboard.

(http://img546.imageshack.us/img546/3333/img20130311161231.th.jpg) (http://img546.imageshack.us/img546/3333/img20130311161231.jpg)

The main chip.

(http://img837.imageshack.us/img837/767/img20130311161341.th.jpg) (http://img837.imageshack.us/img837/767/img20130311161341.jpg)

The screen driving circuit.

(http://img132.imageshack.us/img132/6922/img20130311161317.th.jpg) (http://img132.imageshack.us/img132/6922/img20130311161317.jpg)

The input diodes.

(http://img28.imageshack.us/img28/2738/img20130311161349.th.jpg) (http://img28.imageshack.us/img28/2738/img20130311161349.jpg)

A resistor network

(http://img856.imageshack.us/img856/5659/img20130311161358.th.jpg) (http://img856.imageshack.us/img856/5659/img20130311161358.jpg)

A resistor network and various pots.

(http://img607.imageshack.us/img607/2607/img20130311161406.th.jpg) (http://img607.imageshack.us/img607/2607/img20130311161406.jpg)

The new on switch.

(http://img607.imageshack.us/img607/8585/img20130311161432.th.jpg) (http://hhttp://img607.imageshack.us/img607/8585/img20130311161432.jpg)

The input jacks .

(http://img835.imageshack.us/img835/1182/img20130311161059.th.jpg) (http://img835.imageshack.us/img835/1182/img20130311161059.jpg)

And then  a quick video tour .

AOIP Multipréci Mn5121 (https://www.youtube.com/watch?v=5WSDWuqy50k#ws)
<iframe width="420" height="315" src="https://www.youtube.com/embed/5WSDWuqy50k" frameborder="0" allowfullscreen></iframe>

By the way if someone has got the owner manual for this multimeter can he post it here  ;) That will be very nice.

Also please forgive me if i make some english mistakes :( i'm french  :)
Title: Re: Vintage multimeter : AOIP Multipréci Mn5121 WARNING 8MPX photos
Post by: firewalker on March 11, 2013, 05:54:04 pm
It's not difficult to to use thumbnails. For ImagesHack just add .th before the the .jpg extension.

something like

Code: [Select]
[url=http://img689.imageshack.us/img689/1956/img20130311155732.jpg][img]http://img689.imageshack.us/img689/1956/img20130311155732.th.jpg[/img][/url]
Note the added .th to the img tag.

The result:
(http://img689.imageshack.us/img689/1956/img20130311155732.th.jpg) (http://img689.imageshack.us/img689/1956/img20130311155732.jpg)

Large images makes the thread unreadable.

Alexander.
Title: Re: Vintage multimeter : AOIP Multipréci Mn5121 WARNING 8MPX photos
Post by: Elektrongeek on March 11, 2013, 05:57:52 pm
Thanks i have forget that :p
Title: Re: Vintage multimeter : AOIP Multipréci Mn5121
Post by: Nack486 on March 11, 2013, 07:36:13 pm
Vintage gear has this awesome look to it. Here  (http://imgur.com/a/QYTfL)is some stuff from my school's lab.
Title: Re: Vintage multimeter : AOIP Multipréci Mn5121
Post by: moemoe on March 12, 2013, 11:29:02 am
It's really scary what they rated the devices for these times.

I got an Monacor MT-650 (http://www.fox43.de/Flohmarkt09/Bider/04/1dsc_0038-01_04_gr.jpg) from my grandfather. Look at these lousy connectors, and they rated this device for up to 1200KV AC and DC…

But I still like the analog display for measuring low voltages or currents, because it gives the ability to see trends (rising/falling) just in the corner of your eye. This is much more easy then reading and interpretating digits all the time.
Title: Re: Vintage multimeter : AOIP Multipréci Mn5121
Post by: Elektrongeek on March 12, 2013, 12:35:04 pm
Omg that thing is rated for 1KV  :o

But i have finded worse and they sells that in a store near my house  ;)
http://www.bricodepot.fr/arcachon-biganos/multimetre-analogique/prod11000/ (http://www.bricodepot.fr/arcachon-biganos/multimetre-analogique/prod11000/)

they says on the packaging that it is rated for 500V  :-DD
Title: Re: Vintage multimeter : AOIP Multipréci Mn5121
Post by: Elektrongeek on March 12, 2013, 12:43:25 pm
Hey Nack486 your school lab instruments look like what we are using in my school lab :-+
I'm studying electrical engineering (3 phases motors , Programmable Logic Controller ,and other nice things)
Title: Re: Vintage multimeter : AOIP Multipréci Mn5121
Post by: la6ala on March 12, 2013, 01:09:12 pm
Awesome to see vintage gear like this!  8)