Spectrex Quasar 900 Open-Path Gas Detection System - Manual (Page 70)

SafEye TM Quasar 900 Gas Detector
58 General Conditions for Safe Use
C.2 General Conditions for Safe Use
 The SafEye Quasar 900 IR Open-Path Gas Detector shall consist only of
the approved hardware and software modules.
 The application advice and the limitations of the manual must be taken
into consideration. For calibration and maintenance, the regional and
national regulations have to be taken into consideration.
 The 24V power supply must fulfill the requirements for PELV / SELV of
EN 60950.
 The HART and RS 485 interfaces are not allowed to be used for the
transmission of safety related data.
 The alert conditions according to SIL-2 can be implemented by an Alert
signal via the 20mA current loop.
 After installation and configuration the set-up parameters must be
verified and the function of the SafEye Quasar 900 IR Open-Path Gas
Detector must be checked completely.
 The alarm conditions of the transmitter must be checked periodically
together with the typical gas calibration checks. The SafEye Quasar 900
IR Open-Path Gas Detector must be switched OFF and ON.
 The connected controller must monitor the 4-20mA signal current for
values below 4mA and above 20mA.
 A defect on the SafEye Quasar 900 IR Open-Path Gas Detector must be
repaired within 72 hours.