General Monitors IR5500, Инструкция по эксплуатации

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Model IR5500
42
All faults have a 10-second delay before activating, unless otherwise noted.
During a fault, the ability of the system to detect gas depends on which fault is
active. Fault groups are to highlight that gas detection is generally disabled during
detection and flash input faults (dEt and inF) and enabled during electrical faults
(ELc). Exceptions are noted. If both types of faults are active, the fault which
prevents gas detection has priority.
Fault
Code
Fault
Group
Can
detect
gas
Fault
Code
Fault
Group
Can
detect
gas
F0 dEt Yes F14 ELc No
F1 bbF Yes* F15 ELc Yes
F2 dEt No F16 inF No
F3 dEt No F18 dEt Yes
F4 inF No F19 ELc Yes
F5 ELc Yes F20 dEt No
F6 ELc Yes F21 dEt No
F7 dEt No F22 dEt No
F8 dEt No F23 ELc Yes
F9 dEt No F24 ELc Yes
F10 ELc Yes F25 ELc No
F11 ELc Yes tF6 ELc Yes
F12 inF No tF7 ELc Yes
F13 dEt No tF8 ELc Yes
*The system can detect gas during F1 provided that there is sufficient flash input
signal. The system cannot detect gas if no flash input is received.
5.1.1 F0 Excess Negative Drift
This fault indicates LEL-m < -10% of full scale LEL-m.
ACTION
– Clean the optics. Remove any partial blockage in the beam path.
Verify that the distance between the Source and Receiver is greater than the
range minimum. Align the system.
5.1.2 F1 Close to Low IR
This fault indicates that either (1) IR input intensity is within 10% of the Low IR
fault threshold, or (2) IR input intensity is below the Low IR fault threshold and
the output fault delay time (oFd) has not yet elapsed. .
ACTION
– Unit windows should be cleaned and the optical path checked for
blockage. If the window is clean and the path is clear, realigning the Source
and Receiver when no background gas is present should correct this fault.