Jon, That's great information--I also anticipate a requirement for heavy industrial immunity in the future and have been wondering what problems I might be in for.
With PCs (and computers in general), isn't it the case that if the cables are shielded and grounded to the cabinet there isn't likely to be a problem? For emissions, BTW, I have also had good luck with DEC. Max Kelson [email protected] %> %>I have tested systems to the heavy industrial immunity specification which %>included class B PCs. Both HP Vectra computers and Dell computers faired %>well. Ocassionally the monitors sold with these systems are disturbed to %>the point of turning themselves off (a failure in most books). To date %>I've always been able to solve this problem by upgrading to an NEC %>multisync monitor. The key distinquinction of all these products is that %>they really do meet class B by wide margins and use very good shielding to %>get to that level. Once you have shielding that good and use digital %>techniques inside (as opposed to small signal, high impedance analog %>signals - thermocouples, etc.) heavy industrial immunity compliance is %>usually a given. %> %>Jon D. Curtis, PE %> %>Curtis-Straus LLC [email protected] %>One-Stop Laboratory for EMC, Product Safety and Telecom %>527 Great Road voice (508) 486-8880 %>Littleton, MA 01460 fax (508) 486-8828 %>http://world.std.com/~csweb %>On Wed, 12 Feb 1997, Tony Fredriksson wrote: %> %>>
