Many companies have internal standards that are much higher than
the CE requirements. Sometimes they are historical accidents. Before
general ESD requirements out on the production floor 25Kv testing for
product survivability was a good idea. I still have some larger
customers that require 20 to 25 Kv end product survivability. I
personally require our equipment to meet 16 Kv air discharge, and 8 Kv
direct contact discharges because of the mission criticality of large
LAN systems.
In short I would take into account not only the minimum
requirements (Europe may like to think they have all the answers) but
how often people (no people to touch or shove things into the equipment
no ESD event), and the results of an ESD failure, either operationally
or functionally and then make a determination of the levels you want.
Gary McInturff
-----Original Message-----
From: plaw...@west.net [SMTP:plaw...@west.net]
Sent: Wednesday, August 26, 1998 11:47 AM
To: emc-p...@majordomo.ieee.org; me...@world.std.com
Subject: ESD test levels for medical equipment
My company has been testing our standard power supply products
to the ESD test
voltages in IEC601-1-2:1993 (Medical EMC requirements). The
levels are 3kV
contact & 8kV air.
Recently, one of our customers started testing to IEC601-2-24
(Safety of
Infusion Pumps and Controllers). They said the levels in that
spec are 8kV
contact & 15kV air - much higher than our test levels.
Is this a trend for ESD test levels in product-specific
standards, of
significantly higher test levels? Or are other medical
product-specific
standards comparable to IEC601-1-2 (ie, with a few kV)?
I realize that the next version of IEC601-1-2 raises the contact
discharge
voltage to 6kV. This doesn't seem like a big change.
If the trend is toward higher voltages in these other standards,
I'd like to
find out so we can plan accordingly.
--
Patrick Lawler
plaw...@west.net
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