What is this????????

[Top Cat]

I have a couple, my main use one does 500 v d.c. I also have one that is capable of out loading 1000 v d.c. for over one minute, anything bigger I tend to hire when needed.

So why did you ask the question:-Picture number one gives you all the information has to what it is, what do you test that requires 500 v d.c.?

 

[Jay Sparks]

Thanks TC, I have looked it up and it is for testing in eplosive areas but I cant find the acctual model I have. There is a later model for around £20. But not the grand you are talking about. Not that I could ever sell it!!! I like my pleasures from the missus too much!! BUT if it is actually worth that much....., I can always get a new missus!!!!! lol


Jay

 

[habitual]

I did not ask a question, I just stated a fact, then asked what test would require 500 v d.c.
The guy who asked the question did not know what it was, and rather than give an outright answer I thought a eureka moment would be a better option, I know I prefer to be led onto an answer than to be given it on a plate so to speak. I would also state at this moment that the written word can often be interpreted badly, and if my answer was construed in this way it was not by any means intended to be so.

 

[Top Cat]

I did not ask a question, I just stated a fact, then asked what test would require 500 v d.c.
The guy who asked the question did not know what it was, and rather than give an outright answer I thought a eureka moment would be a better option, I know I prefer to be led onto an answer than to be given it on a plate so to speak. I would also state at this moment that the written word can often be interpreted badly, and if my answer was construed in this way it was not by any means intended to be so.

Sorry pal, it must be getting past my bedtime. I apologize.

 

[habitual]

No problem, its way past mine anyway, but just can not stop having a look around this forum, looks very good to be honest.
I have just dug out my Metrohm tester which is in bits I will have to take a picture an upload it so you can see what's inside them.

 

[Jay Sparks]

I did think it was an IR tester but given the date on it, I wanted to know more and as TC pointed out, its normally used in an explosive atmosphere. The only explosive atmosphere Im used to, is when I come back from the club on a fri night!!!!


Jay

 

[MarkieSparkie]

Edgecume Peebles Metrohm Model 7 Tester
​

Edgecumbe Peebles Ltd became Edgecumbe Instruments Ltd which were then bought by Spirent Communications Scotland Ltd. On the 1st February 2003, Spirent Communications Scotland Ltd (formerly Edgcumbe Instruments Ltd), agreed the transfer of ownership for the metrohm.net domain name, together with the E3511 and E3640 products, to Martindale Electric Company Ltd. Subsequently Martindale also acquired the remaining low voltage test equipment business of Spirent Communications Scotland Ltd. This included the 16R RCD tester, the 16L Loop tester and the 16A and 16D series of Insulation Testers as well as the D2112 EasyPAT and MPAT Series of PAT Testers. Martindale also acquired the Metrohm 7A Intrinsically Safe 7A501C Insulation Tester. Subsequently the 16th Edition Range and the PAT Testers were rebranded as Martindale products. MET16R - MARRC2000, MET16L - MARLP2000, 16D500 - MARIN2001, 16D251 - MARIN2003, 16A500 - MARIN1001 and 16A251 - MARIN1003.

The Metrohm Model 7, 500Vdc Insulation Resistance and Continuity, analogue tester, has been in production for approaching 50 years in one guise or another. The Martindale 7A501C is still available as an intrinsically safe tester for use in Non-EU countries where the lack of ATEX:1994 approval is not seen as a handicap, the current price is £759 +VAT.
Early Metrohm Model 7s were powered by a PP7 9V radio battery, these are near impossible to source now. Later Models are powered by 3x2 AA batteries in a removable battery holder and this solution can be adapted for early models still in service. The twin analogue scales on the Model 7 and later models are the standard of the time, with the insulation resistance upper scale in MΩ reading from right to left and the continuity lower scale in Ω reading left to right.
See the link below for the 7A501 User Manual, the information is similar to the original Model 7 manual:

http://martindale-electric.co.uk/manuals/manMET7A501C.pdf

http://www.cuthbertsonlaird.co.uk/Detail.asp?ProdID=137

 

[mackers]

remember that model well! when i was about 10 i was snooping about in my dads tool bag and found this interesting looking thing with leads and buttons? put leads in and started pressing buttons then WALLOP i IR myself gave me a right shock (excuse the pun)
put everything back and never said owt as i would have been in bother for been i his tool bag!LOL

 

[cogsey133]

Ok....looking at the pictures really makes me feel old....cheers mate! I remember using one of these when i worked for the MOD they are a fantastic bit of kit.

 

[telectrix]

bit late seeing this thread, but here goes. first, open the battery compartment. inside you will probably find an obsolete PP7 battery. it's 9v, so replace with a couple ( or 3) duracell PP3's, parallelled up. then it's a 500v insulation tester by pressing the side of the switch marked M ohms. the ohms side is for continuity. cracking little meter. i've had mine for 20 years. it came from a car boot in 1980.

 

[Engineer54]

This is one solid bit of test kit that has stood the test of time!! The intrinsically safe variant has been safely used in all types of hazardous environments and industries around the world for around 45 years or more. Suddenly, it seems these ''intrinsically safe'' units aren't safe anymore in Europe, according to ATTEX. lol.....
I personally don't know of any other IR test kit that WOULD comply, so one has to wonder if they actually IR circuits in explosive/hazardous areas anymore?? lol!!

If i were you, i'd send that Metrohm unit off for a decent service and calibration, and either keep it in pride of place or sell it to a deserving purchaser...

 

[Jay Sparks]

This is one solid bit of test kit that has stood the test of time!! The intrinsically safe variant has been safely used in all types of hazardous environments and industries around the world for around 45 years or more. Suddenly, it seems these ''intrinsically safe'' units aren't safe anymore in Europe, according to ATTEX. lol.....
I personally don't know of any other IR test kit that WOULD comply, so one has to wonder if they actually IR circuits in explosive/hazardous areas anymore?? lol!!

If i were you, i'd send that Metrohm unit off for a decent service and calibration, and either keep it in pride of place or sell it to a deserving purchaser...

Thanks E54,

I think I may just hold on to it. Its a nice piece of history. And not only that, its not in the best of shape (scuffs and scratches everywere), so I would not get that much for it. Plus the wife would go mental, as her dad gave me it as a pressy thinking I could use it!! lol


Jay

 

[telectrix]

use the bloody thing! i still use mine for fault finding. not as much to lug about as a MFT, and you get that magic moving needle that tells you there's something happening, rather than a fluctuating set of numbers, whose main purpose in life is to drain the batteries in your tester.

 

[kissofjudas]

Probably came from someone who was an electrician in the mining industry, when there was one all those years ago.

 

[Jay Sparks]

use the bloody thing! i still use mine for fault finding. not as much to lug about as a MFT, and you get that magic moving needle that tells you there's something happening, rather than a fluctuating set of numbers, whose main purpose in life is to drain the batteries in your tester.

Id have to look into how much it will cost to sort it out first! Not even sure it works properly.


Jay