Isolation methods for surge immunity tests

2001-10-26 Thread Biggs, Daniel (IndSys, GEFanuc, NA)
We are testing a comm line for 61000-4-5 and are using a laptop PC for support equipment (EUT will be talking to the PC). Do any of you know what could be used to isolate the PC from the surge being applied to the EUT comm line? Are opto-isolaters typically used for this purpose, and if so, can

ENV 50121-5

2001-09-06 Thread Biggs, Daniel (IndSys, GEFanuc, NA)
I am looking for a short description of ENV 50121-5. What does it cover? What tests does it specify? What limits does it specify for tests? Thanks, DB --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc

61000-4-5 on unshielded E-net

2001-06-14 Thread Biggs, Daniel (IndSys, GEFanuc, NA)
Greetings, What method is used to test unshielded ethernet lines for voltage surge? Thanks, DB ___ GE Fanuc Automation Daniel Biggs Test Engineer Hardware Design Services ph: 804-978-6946 fax: 804-978-5588 e-mail: daniel.bi...@cho.ge.com

EN 50021 question

2001-05-23 Thread Biggs, Daniel (IndSys, GEFanuc, NA)
Greetings, In 1999, pR EN 50021 went to EN 50021. My question is...why have the spacings for Pollution degree 2 been changed between the preliminary version to the adopted version of 50021. The spacing requirements seem to have increased. DB ___

Voltage fluctuations and flicker 61000-3-3

2001-04-27 Thread Biggs, Daniel (IndSys, GEFanuc, NA)
Is anyone familiar with this test and its applicability to control and display station equipment used for automation? Is this test appropriate for this type of equipment? Thanks, DB

ISA-S71.04

2001-01-09 Thread Biggs, Daniel (IndSys, GEFanuc, NA)
Greetings, I was wondering if anyone out there is familiar with this standard and/or know of a coating that can be used on PCBs to protect them from potentially corrosive gases and airborne contaminents. The standard specifically deals with process measurement and control systems. Thanks, DB

PLC's in radioactive environment?

2000-11-20 Thread Biggs, Daniel (IndSys, GEFanuc, NA)
Is there anyone out there that has had any experience with installing automation in a radioactive environment where the equipment would be possibly exposed to gamma and xrays? Are there any products or organizations that build/develops gamma X-ray protection for electronics?? Thanks, DB

SEMI F47

2000-07-27 Thread Biggs, Daniel (IndSys, GEFanuc, NA)
Has anyone on this list heard of standard SEMI F47? Is there a similar european standard to this? What exactly does the standard deal with? DB g GE Industrial Systems ___ Daniel Biggs Test Engineer

RE: Is Your Head Clamp CE Marked?

1999-11-15 Thread Biggs, Daniel (IndSys, GEFanuc, NA)
The Truth Is Out There.. -Original Message- From: Scott Douglas [mailto:s_doug...@ecrm.com] Sent: Monday, November 15, 1999 11:18 AM To: EMC-PSTC (E-mail) Subject: Is Your Head Clamp CE Marked? Hi All, Happened to see the X-Files last night and noted that the clamp used to

Australia vs. New Zealand

1999-08-02 Thread Biggs, Daniel (IndSys, GEFanuc, NA)
Greetings, Does anyone know what the differences there are between the New Zealand and Australian EMC regulations? I know they are trying to harmonize but if someone could either tell me or point me to a web page it would certainly be appreciated. Thanks, Dan

Operator Interface Displays

1999-07-30 Thread Biggs, Daniel (IndSys, GEFanuc, NA)
Does anyone know of a standard that talks about the testing requirements on a display/keyboard interface. I am interested in knowing what kind of ESD tests to perform on it. Are contact, air and indirect discharge necessary? Does anyone have experience with Operator Interfaces? Are there

IEC950 vs. EN 60950

1999-07-19 Thread Biggs, Daniel (IndSys, GEFanuc, NA)
To those LVD expertshow do IEC950 and EN 60950 differ? I understand one is an international standard and one is european but are they considered the same basic standard? DB ___ Daniel W. Biggs HW Development