Re: [PSES] Spark Ignition Source

[Kevin Robinson]

A common source used for calibration of the spark test chamber for intrinsic 
safety testing is a 95 mH air core inductor connected to a 24vDC source with 
current limiting that is adjusted based on the gas group you are using.  

Kevin Robinson




On Tue, Aug 16, 2016 at 7:57 PM -0400, "Doug Powell"  wrote:










All,
I am looking for a supplier of electrical spark ignition sources used in 
flammable vapor or dust testing.  It needs to have a calibrated energy level 
and be able to provide two sparks per second with sufficient energy to ignite 
natural gas.  Any help is much appreciated.
All the best, Doug


-- 

Douglas E Powell

doug...@gmail.com
http://www.linkedin.com/in/dougp01


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Re: [PSES] Spark Ignition Source

[Brian O'Connell]

Is typically two different things - the ASTM E2019/EN13821 MIE stuff or the Mil 
stuff based on an LEL mix.

Has been a very long while since these tests were witnessed, but do remember 
that the MIE tests can be rather sensitive to the shape of the VI curve per 
time, so L needs good control. Remember that the test conditions can be rather 
complex as it depends on suspensive gas, LOC/gas blanketing, colloids, 
volumetric R, charge build-up, temp/humidity, etc. The two labs that did my 
tests both used home-grown ignition sources: typical lab DC source that charged 
a series of calibrated RLC networks for the energy 'bucket'.

The test containers (steel spheres and columns) were complex and had several 
different types of igniter electrode pairs, and connections for multiple power 
sources.

Brian


From: Doug Powell [mailto:doug...@gmail.com] 
Sent: Tuesday, August 16, 2016 4:53 PM
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: [PSES] Spark Ignition Source

All,

I am looking for a supplier of electrical spark ignition sources used in 
flammable vapor or dust testing.  It needs to have a calibrated energy level 
and be able to provide two sparks per second with sufficient energy to ignite 
natural gas.  Any help is much appreciated.

All the best, Doug

-- 

Douglas E Powell

doug...@gmail.com
http://www.linkedin.com/in/dougp01

-

This message is from the IEEE Product Safety Engineering Society emc-pstc 
discussion list. To post a message to the list, send your e-mail to 


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formats), large files, etc.

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