Good morning, We do use a chart recorder to monitor the general conditions, however; the required records are actually written on the test setup sheet at the beginning and end of testing. Readings are made from a calibrated (NIST traceable) Omega chart recorder. I agree, that the requirement are that the conditions during testing are the critical values, but it is a good idea to watch the trends. Indoors, the values should be stable during a test lasting an hour or two. -Doug
_____ From: [email protected] [mailto:[email protected]] On Behalf Of Jon Larkin Sent: Tuesday, June 06, 2006 3:10 AM To: [email protected] Subject: Fw: Temperature Humidity Pressure Recorder in ESD room Hello Wendy, We have got a very cheap digital temperature/humidity meter that was bought for only a few Euros. It has a memory function that records the maximum and minimum values. This memory function can be reset, for example, at the start of each day's testing. This gives us the temperature and humidity range for that day. However, in my experience, ESD testing does not take very long. Therefore I think that it is adequate to just note the temperature and humidity at the start of the test, and then check the values after an hour, if the testing is still going. Jon Larkin Cranage EMC & Safety ----- Original Message ----- From: Wendy <mailto:[email protected]> To: [email protected] Sent: Tuesday, June 06, 2006 4:36 AM Subject: Temperature Humidity Pressure Recorder in ESD room Dear Group, Is it necessary to have a recorder (for 24hr/7day/31days) for temperature/humidity/pressure in the ESD room? I cant find this stated anywhere in the 61000-4-2 standard. I have a thermohygrometer that only displays the temperature/humidity but does not record. Is this sufficient? If not, can anybody recommend me a reliable recorder? We have 2 Omega CTH89 but the pen arm was not working and hence could no longer record. And the repair cost is high! (FYI I do not use a barometer because my country’s pressure does not vary too much and is always within that required by the standard). Regards, Wendy Nya - ---------------------------------------------------------------- This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. Website: http://www.ieee-pses.org/ To post a message to the list, send your e-mail to [email protected] Instructions: http://listserv.ieee.org/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas [email protected] Mike Cantwell [email protected] For policy questions, send mail to: Jim Bacher: [email protected] David Heald: [email protected] All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc - ---------------------------------------------------------------- This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. Website: http://www.ieee-pses.org/ To post a message to the list, send your e-mail to [email protected] Instructions: http://listserv.ieee.org/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas [email protected] Mike Cantwell [email protected] For policy questions, send mail to: Jim Bacher: [email protected] David Heald: [email protected] All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc - ---------------------------------------------------------------- This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. Website: http://www.ieee-pses.org/ To post a message to the list, send your e-mail to [email protected] Instructions: http://listserv.ieee.org/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas [email protected] Mike Cantwell [email protected] For policy questions, send mail to: Jim Bacher: [email protected] David Heald: [email protected] All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
