Look at this last year - did not have required long-term accuracy. As long as your IT admin guys do not mind, this is a decent solution at a decent price for windoze shops, but could still be used with any other OS if you keep to HTML and TCP for I/O.
Brian -----Original Message----- From: Gray, David [mailto:[email protected]] Sent: Monday, June 03, 2013 9:45 AM To: [email protected]; [email protected] Subject: RE: [PSES] recording Temp, % RH & AP I use an Omega iBTHx unit. This connects to your network with a built in server. I also have a LV program that reads and logs the information. -David G -----Original Message----- From: Brian Oconnell [mailto:[email protected]] Sent: Friday, May 31, 2013 3:46 PM To: [email protected] Subject: Re: [PSES] recording Temp, % RH & AP I have used the Vaisala (sp?) stuff. They make some nice modules where all three sensors are embeded in same assembly and do I/O via RS232,422, or 485; which I like to use on a current loop. Nice range and accuracy for most labs inhabitable by humans. As for LabView, meh - would be more apt to spend my spare time at an old ladies classical music chamber society then doing LV. LV has serial IO and string parsing VIs, so feel free to draw wires and move boxes about the screen... Brian -----Original Message----- From: [email protected] [mailto:[email protected]]On Behalf Of Kunde, Brian Sent: Friday, May 31, 2013 1:09 PM To: [email protected]; [email protected] Subject: RE: [PSES] recording Temp, % RH & AP I'm in the market for a good reasonably priced Temp/%RH/AP meter/recorder device which I can easily and directly read from my computer with Labview. Any suggested brands and model numbers? I want to read the values directly so programming command information is a must. SCPI, Ethernet, Serial, etc.. Any suggestions? The Other Brian -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Brian Oconnell Sent: Tuesday, May 28, 2013 2:56 PM To: [email protected] Subject: RE: [PSES] recording Temp, % RH & AP This is a good example for 'lets just get it done now' where the staff does no work other than mounting on wall. There are some long-term problems with this class of stuff. What ya gonna do when your last XP/7 box dies? Can I suck data out of it and/or calibrate without proprietary software? Modularity = long-term support. My policy for all lab equipment has served me well for several years, is if no SCPI, then it had better be readable ASCII, and all commands part of user instructions. IVI is even better. Brian -----Original Message----- From: Boštjan Glavič [mailto:[email protected]] Sent: Tuesday, May 28, 2013 11:13 AM To: <[email protected]> Cc: [email protected] Subject: Re: [PSES] recording Temp, % RH & AP Dear Julias, I believe it is enough to measure pressure in one location only. So you can save some money on calibration We are using omega dataloger in every room. It can store data up to 1 month without the problem and batteries are ok for 6 months. See below link. Best regards, Bostjan http://www.omega.com/ppt/pptsc.asp?ref=OM-CP-PRHTEMP2000&Nav=tems08 On 28. maj 2013, at 18:42, "Brian Oconnell" <[email protected]<mailto:[email protected]>> wrote: Measurement and recording of ambient conditions (temperature, RH, and atmospheric pressure) are and instrumentation and HVAC-control issue. Made more complex for larger labs and/or multiple equipment installed that emit significant amounts of heated/humidified air. There is, of course, the most basic solution of mounting those circular chart recorders about the lab. My solution has been to measure and record where the HVAC-control head is located, and measure/record at the EUT. The other important variables are the placement of the HVAC sensors, placement of exhaust ports, and control of heating/cooling air flow. Data logging is not complex - use decent sensors and an old PC-box or seldom-used server. This will become a legacy system - think very long-term support, so use very simple code (ANSI C or Python) that just streams the data to a CSV file. I recently helped a colleague develop a logging system where each sensor station run by a local microcontroller that dumps data on command via a RS422 current-loop. The remaining issue, for ISO17025 stuff, is calibration. Design modular sensor heads that can be detached and sent to cal lab, or buy sensor stuff intended for that purpose. And if you buy American sensors, you may have to run the data through Google Translate to get British data. Brian -----Original Message----- From: [email protected]<mailto:[email protected]> [mailto:[email protected]]On Behalf Of Julian Jones Sent: Tuesday, May 28, 2013 7:54 AM To: [email protected]<mailto:[email protected]> Subject: recording Temp, % RH & AP I am interested in how people record the local lab environmental conditions. When we only had one test area it was easy. Has anyone got an automated logging to a database system working that they can recommend ? The fall back would be to buy several discrete meters and have one per area, but then there is the usual error between cheap units. Any suggestions greatly appreciated. Julian Jones Hursley EMC Services Tel: 023 8027 1111 Mob: 07787 523 607 [email protected]<mailto:[email protected]> Trafalgar House, Trafalgar Close, Chandlers Ford EASTLEIGH, Hampshire, SO53 4BW Company Registration 3301279 - ---------------------------------------------------------------- This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to <[email protected]> All emc-pstc postings are archived and searchable on the web at: http://www.ieee-pses.org/emc-pstc.html Attachments are not permitted but the IEEE PSES Online Communities site at http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used formats), large files, etc. Website: http://www.ieee-pses.org/ 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]>
