Nexus Solutions Inc.

Nexus Solutions Inc.

- Gas Auditor Software



CEMView Gas Auditor is a dynamic, configurable software application to automate the cylinder gas auditing and testing procedures. Complex and labor intensive regulatory compliance tests, such as a Cylinder Gas Audit (CGA) or a Linearity check, are initiated, controlled, recorded and reported with the CEMView Gas Auditor.

The application is designed to work in parallel with the CEMView Data Acquisition & Reporting Software or as a stand-alone application with direct connectivity to an instrument with an appropriate instrument OPC server. With the CEMView Gas Auditor, various cylinder gas checks can be pre-programmed and easily run, on demand. Automatic and / or manual control sequences are easily developed with the integrated Windows Scripting Languages (VB Script and JScript).

The powerful Nexus Calculation Processor (NCP) integrated into the Gas Auditor application ensures unparalleled control capability of the gas valve solenoids and other analog and discrete I/O. With the Gas Auditor application, the process to capture any data to the database is very simple to configure and control. Charts and reports are easily created and viewed, and the information is readily available in Excel spreadsheet format for effortless inclusion with the final reports and test results submitted to the regulatory authority.

For example, the following is done to configure a Cylinder Gas Audit test in Gas Auditor.

  • Specify the gases to be audited.
  • SO2, NO, CO2
  • Specify the sequence for the test
  • Low, High, Mid, High, Low, Mid, Low, High, Mid
  • Configure purge time and averaging time for the sequence

The application’s built-in inventory management capabilities for the gas cylinders allows the tracking of the following information

  • Gas cylinder manufacturer name
  • Cylinder serial number
  • First used on date
  • Cylinder expiry date
  • Gases in the cylinder
  • Concentration of each gas in the cylinder

Before a CGA test starts, the application will automatically check and generate warning alarms if:

  • Gas cylinder is out-of-date
  • Cylinder gas pressure is low

The application will then proceed if everything is okay and it will automatically control the appropriate solenoid valves to produce the pre-programmed timing and sequence as it was previously specified. At the end of the pre-programmed sequence, the application will compute the following

  • Average CEM response value for the three audit points for each gas
  • Average CEM response value and the accuracy in percent, for each gas
  • Pass / Fail based on the results of the test.

A Cylinder Gas Audit Data Assessment Report is then automatically generated for the test by the system.

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