There are a series of ENs, 50121, relating to EMC 
requirements for "railway equipment".
That's all I know - I just noted in my records back
in 1997 that they were starting to appear.

I also note in EN 61000-4-8 Power frequency magnetic
field immunity, that 1 A/m corresponds to a free space
induction of 1.26 uT, and test levels of 1, 3, 10, 30,
and 100 A/m are given for continuous field. 

Regards,
John Crabb, Development Excellence (Product Safety) ,     
NCR  Financial Solutions Group Ltd.,  Discovery Centre, 
3 Fulton Road, Dundee, Scotland, DD2 4SW
E-Mail :john.cr...@scotland.ncr.com
Tel: +44 (0)1382-592289  (direct ). Fax +44 (0)1382-622243. 

-----Original Message-----
From: marti...@appliedbiosystems.com
[mailto:marti...@appliedbiosystems.com]
Sent: 07 February 2002 22:22
To: emc-p...@majordomo.ieee.org
Subject: Teslars???



We have a customer that is concerned about how our product, laboratory
equipment, will respond to electromagnetic disturbances from a high speed
train that runs close to their lab.  The customer states that the
disturbance will be around 0.7-1.2 m Teslar.

Can someone please explain what the unit Teslar is and how that unit
relates, or if it relates, to the immunity tests of EN 61000-4-3 Radiated
immunity, or any other immunity test.

Has anyone ever had a similar concern from a customer dealing with this
type of disturbance?

Your responses are appreciated.

Regards

Joe Martin
EMC/Product Safety Engineer
Applied Biosystems
marti...@appliedbiosystems.com

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