Author Topic: Reed ST-9919 pics  (Read 5303 times)

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Offline BloodyCactusTopic starter

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Reed ST-9919 pics
« on: October 28, 2011, 01:24:55 am »
Since I didnt find anything on the net, I took my Reed DMM apart for pics! It arrived last week from www.tequipment.net There was 9 screws holding the board to the front so I did not bother to get to turn it over. This works fine for what I need to do... shrug.

front;


battery, two brass screw holders (nice) and golden pineapple (bzzzzt)


cracking it open, 6 of these babies, and I already lost one of those little black washers! :( These are raw into the plastic. no brass :(


the inside is fairly clean;


the chip is an ES 51966P


we have a 500ma and 10A ceramic fuse




look at the state of these grey fellas!


oh it gets better! 3 resistors covered in solder wired together.. and just about touching the one underneath!!!!


-- Aussie living in the USA --
 

Offline FenderBender

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Re: Reed ST-9919 pics
« Reply #1 on: October 28, 2011, 02:05:21 am »
Looks kind of like that Extech Dave had in the $100 shootout. Whether that's an Extech design or Extech stole it from someone else...I don't know.
 

Offline vl400

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Re: Reed ST-9919 pics
« Reply #2 on: October 28, 2011, 05:16:26 am »
And a Jaycar QM-1541 which has been discontinued.

 

Offline ciccio

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Re: Reed ST-9919 pics
« Reply #3 on: October 29, 2011, 05:07:05 pm »
I've checked the EXTECH video, and the PCB has some slight differences.
It seems a different revision or a smart copy..
Strenua Nos Exercet Inertia
I'm old enough, I don't repeat mistakes.
I always invent new ones
 

Offline somlioy

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Re: Reed ST-9919 pics
« Reply #4 on: October 29, 2011, 05:39:59 pm »
Looks like one of Elits multimeters aswell:

I dont like it. Too slow on the auto-range detection imo.
 

Offline BloodyCactusTopic starter

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Re: Reed ST-9919 pics
« Reply #5 on: October 29, 2011, 06:44:17 pm »
Yeah, its obviously a design that is shopped around for house brands and the like. There is no name silkscreened on the PCB that I saw, it had a revision date of 2005. DT9919-6 05-11-15..

So a november 15 2005 revision...

-- Aussie living in the USA --
 

Offline Kiriakos-GR

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Re: Reed ST-9919 pics
« Reply #6 on: October 29, 2011, 11:19:07 pm »
Yes looks to be an OEM production of CEM China.
More details here http://www.cem-instruments.com/en/pro/sort7-1.html

All those OEM designs have acceptable built quality, but not speed ,
and this is normal, for low cost real multimeter s.  :)
 


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