MSA BACHARACH MGS-401, Руководство пользователя

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BACHARACH MGS-401 User Manual
Warning: This instrument indicates gas concentration(s) that may be present in the space
where the attached gas detectors are located. The primary instrument to alarm personnel of
a low alarm or high alarm concentration level are the gas detectors that are monitoring the
space. If the attached gas detectors indicate a low alarm or high alarm concentration level,
DO NOT enter the monitored space.
Failure to follow this warning can result in serious bodily injury or death.
Warning: If gas concentrations are increasing rapidly or are approaching OEL (Occupational
Exposure Levels) or STEL (Short Term Exposure Limit) levels, evacuate the space and take
measures to reduce gas concentrations to acceptable levels before re-entering.
Failure to follow this warning can result in serious bodily injury or death.
2.2 System Guidance
The MGS-401 Entrance Monitor is but one piece of a complete gas detection system. MGS-400 Series
Gas detectors in the monitored area can signal via digital bus, relays and/or audible and visual
output. The digital Modbus connection from the gas detectors provides the responses to the MGS-
401, which in turn provides an audible and visual alarm outside the monitored space. In addition, the
MGS-401 displays any gas concentration level in the space for additional information and visual
monitoring. System configuration will determine whether the alarms signals are addressed in the
monitored space or at a controller or BMS/BAS level. Consultation with local inspection authorities is
recommended.
For recommended alarm levels refer to NIOSH (National Institute of Occupational Safety and Health)
and OSHA (Occupational Safety and Health Administration) standards for OEL (Occupational
Exposure Limit) and STEL (Short-Term Exposure Limit) gas exposure levels for best practice. In
addition, ASHRAE 15/34, IIAR 2, EN378 and CSA-B52 provide recommended alarm levels for certain
types of gases.