Sierra Monitor Corporation TR-001 user manual

Summary of the content on the page No. 1

Technical Reprint TR-001


To minimize risks, a plant-wide gas monitoring system must meet the specific needs of
the facility in terms of system inputs and outputs and data acquisition.

Plant-Wide Gas Monitoring for Risk Control


as monitoring has become an integral part of many environmental protection and safety programs. Because of
G increased attention to risks posed by gas, systems that simply annunciate an alarm condition are no longer
adequate. Gas monitoring programs now co

Summary of the content on the page No. 2

Technical Reprint TR-001 GAS MONITORING OPTIONS Gases are monitored with permanently installed (fixed) systems or portable instruments, or by taking samples for evaluation in a laboratory. Portables and sampling are by their very nature only spot checks and are appropriate only when the risk is extremely low or fixed instruments are not practical. As a general principle, areas where the risk is sufficient to justify periodic monitoring with a portable instrument, warrant a fixed system

Summary of the content on the page No. 3

Technical Reprint TR-001 PLANT-WIDE MONITORING Plant-wide gas monitoring offers many benefits, among them: • Centralized monitoring of all gas measurements • Monitoring the status of control elements • Establishing a “command center” to respond to alarm events • Remote access to all system data • Centralized reporting In a plant that has been instrumented over a period of years, the gas detection system is likely to be an autonomous installation. The controller might be in the field

Summary of the content on the page No. 4

Technical Reprint TR-001 DCS software in conjunction with Sentry provides the operator enhanced data acquisition, alarming and alarm management, historical trending, distributed architecture, and integration into the plant's distributed control system. Sentry's MODBUS communication interface provides over 620 different parameters accessible by the PC-based DCS software, including: • Gas concentration • Alarm setpoints • Sensor diagnostic messages • Historical reset time/date • Power