Industrial ppm CO measurements

Written by Scott Cowe of Dover Gas Technologies

It is a well known and heavily publicized fact that carbon monoxide is a dangerous gas even at low exposure levels. While measurement solutions for residential applications are fairly simple, industrial and commercial applications require a much more sophisticated instrument. Problems withrepparttar accuracy of many measurement devices arise due to zero instability and cross sensitivity to other gasses onrepparttar 133520 sensors especially in industrial situations where temperature changes andrepparttar 133521 presence of other process gasses are an ongoing part of everyday life. Upper exposure limits for CO inrepparttar 133522 work place are normally set to provide alarms or warnings at 25-50ppm, sensor inaccuracies often cause alarms to be triggered when in fact no actual carbon monoxide danger exists.

When higher levels of CO are present, proper safety procedure calls forrepparttar 133523 halt of production andrepparttar 133524 evacuation of all personnel fromrepparttar 133525 area untilrepparttar 133526 levels can be verified, reduced andrepparttar 133527 source identified. These precautions taken against this potentially deadly gas show responsibility onrepparttar 133528 part ofrepparttar 133529 employer and can saverepparttar 133530 lives of many who work to makerepparttar 133531 company profitable. The resulting down time can however have many detrimental effects including, employee stress, safety concerns from outside agencies, and reduced production, it is therefore vitally important that we ensure that CO alarms are set off only by actual increased levels of carbon monoxide. In an effort to reach this goal there are a number of considerations to be looked at,repparttar 133532 following information is provided for that purpose.

The most common types of detectors used for Carbon Monoxide measurements are,

1) NDIR or infra-red which although is very specific torepparttar 133533 gas being measured requires a warm-up time, is fairly large, can consume larger amounts of power making it unsuitable for small or portable instruments, and is more expensive. For ranges of CO measurement in industrial uses other than Low ppm this technology is by farrepparttar 133534 number one choice.

2) Solid State, while this technology is small and cost effective it is not selective enough for CO only measurements and usually has higher temperature drift makingrepparttar 133535 zero unstable.

3) and Electrochemical which isrepparttar 133536 primary choice forrepparttar 133537 majority of Carbon Monoxide analyzers onrepparttar 133538 market today due to itís many benefits which include, size, weight, power, cost, and proven performance.

The remainder of this article will deal only withrepparttar 133539 electrochemical sensor.

There are a number of electrochemical sensor manufacturers worldwide and each of these has a number of sensors designed for carbon monoxide measurements in different applications, choosingrepparttar 133540 right one isrepparttar 133541 key to success. The output from most of these sensors is very low, (pico amps per parts per million) so even subtle changes or correction procedures must be dealt with using extreme care in order to preserverepparttar 133542 integrity ofrepparttar 133543 signal. Sensors designed for higher concentrations of CO have a lower output per ppm which can cause it to have a

Installing Nessus 2.0 on SuSE 9.0 Pro with KDE 3.1

Written by Lew Newlin

Installing Nessus 2.0 on SuSE 9.0 Pro with KDE 3.1

The following is a simple how-to guide for installingrepparttar Nessus vulnerability scanner, server daemon, and client on SuSE Linux. The instructions do not include in depth explanations as it is assumed that you are familiar with features and benefits of Nessus and have a general working knowledge of Linux.

As with any software installation, your results may vary depending onrepparttar 133519 machine. The installation steps were conducted usingrepparttar 133520 commercial version of SuSE 9.0 Professional steps were tested on a notebook, workstation, and server to insure accuracy. The one difference that may occur during your installation is that ofrepparttar 133521 network card and/or Internet connection. At SiteRecon we do not use DHCP and each installation required manual setup of NIC and IP information. If you use DHCP,repparttar 133522 network and Internet setup will differ fromrepparttar 133523 instructions below.

The installation process should be conducted usingrepparttar 133524 "root" account. It is strongly suggested that your install take place on a safe non-routable network that does not have hostile traffic. Your system will be vulnerable and could easily become infected with a virus, worm, bomb, or hacked.

Install SuSE 9.0 Professional

  • Insert Disk 1 and boot system
  • Press F2 - select screen resolution
  • Use up/down arrows to select "Installation"
  • Select Language
  • Select "New Installation" (Screen may not appear depending on installation)
  • "Installation Settings" change anything needed then
  • YaST2 "Start installation" (Screen may not appear depending on installation)
  • System Reboots...
  • Insert Disk 2 as requested, select
  • Click "Expert Options" button and change Encryption type to MD5
  • Enter root user password
  • "Network Configuration" - change as needed
  • "Test Internet Connection"
  • "User Authentication Method"
  • "Add a New Local User" - uncheck "Auto Login, enter data as desired
  • "Release Notes"
  • "Hardware Configuration"
  • "Installation Completed"
  • System boots to KDE interface
  • Login as root
  • "Welcome to SuSE Linux 9.0"
  • Click "Control Center" on task bar
  • Click "Desktop"
  • Click "Size & Orientation"
  • Select desired screen resolution, check "Apply settings on KDE startup"
  • Click "Accept Configuration"
  • Close "Size & Orientation" window

  • Network Card Setup (if needed)
    • Click "Control Center" on task bar
    • Click "YaST2 modules"
    • Click "Network Devices"
    • Click "Network card" and setup you NIC

  • SuSE Watcher
    • Click "SuSE Watcher" on task bar (round green or red icon on right)
    • Click
    • Click "Start online update"
    • "Welcome to YaST Online Update"
    • Take desired actions when prompted.
    • When completed, check "Remove Source Packages after Update", click

You now have a fully functioning and patched installation of SuSE and are ready to installrepparttar 133525 applications required for Nessus. It should be noted that by installingrepparttar 133526 programs below, you are also setting up an environment to compile GCC C programs. Additional information on GCC can be found at

Nessus Application Requirements

  • Click "Control Center" on task bar
  • Click "YaST2 modules"
  • Click "Software"
  • Click "Install and Remove Software" and installrepparttar 133527 following programs:
    • Bison
    • Flex
    • Gcc
    • Gcc-c++
    • GTK2
    • GTK2-devel
    • GTK-devel
    • kdepim3-time-management package
    • libnet
    • Make
    • OpenSSL
    • OpenSSL-devel
    • Perl
    • sharutils
    • xfree86
    • xfree86-compat-libs
    • xfree86-devel
  • Run YaST Online Update to patch all installed programs

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