Hi Joe:
> 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.
I believe you mean "tesla" (with a lower-case t), not
"Teslar."
The symbol for tesla is upper case T.
According to ISO Standards Handbook 2, the tesla is a
unit of magnetic flux density.
"The magnetic flux density is an axial vector
quantity such that the force exerted on an element
of current is equal to the vector product of this
element and the magnetic flux density."
1 T = 1 N/(A*m)
1 T = 1 Wb/m^2
1 T = 1 V*s/m^2
I'm sure your customer is referring to an electric
train.
I recall a suburban electric train line where the
stations had color TV monitors to announce the train
and its schedule. A few minutes before the train
arrived in the station (and usually before you could
see the train), the monitor's colors would go awry.
The degradation would increase until the train
arrived, at which time the normal colors were
restored.
Upon departure, the colors would again go awry, and
then gradually return to normal.
The color degradation was due to the magnetic field
around the overhead wire.
Best regards,
Rich
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