MSA GM FL5000 - Continuous Optical Path Monitoring - COPM Circuitry

14 FL5000 Multi-Spectrum Flame Detector US
4 Principles of Operation
Device Status Standard Mode
Low Voltage, Code or Data, Checksum Fault
Green LED OFF
Yellow LED ON
RedLED OFF
Blue LED OFF
Test Mode Activated
Green LED 0.9s ON, 0.1s OFF
Yellow LED OFF
RedLED OFF
Blue LED OFF
Test Mode Warning
Green LED Alternate blinking slowly (1 Hz)
Yellow LED OFF
RedLED Alternate blinking slowly (1 Hz)
Blue LED OFF
Test Mode Alarm
Green LED Alternate blinking slowly (2.5 Hz)
Yellow LED OFF
RedLED Alternate blinking slowly (2.5 Hz)
Blue LED OFF
Bluetooth Search Mode
Green LED OFF
Yellow LED ON
RedLED OFF
Blue LED Alternate blinking slowly (1 Hz)
Bluetooth Connect Mode
Green LED OFF
Yellow LED ON
RedLED OFF
Blue LED ON
4.2 Continuous Optical Path Monitoring - COPM Circuitry
A self-testing feature called Continuous Optical Path Monitoring (COPM) checks the optical path, the detector(s), and the
related electronic circuitry once every 2 minutes. If foreign material on the front surface of the FL5000 blocks the COPM
light from reaching the detector(s) for four minutes, the unit will indicate FAULT.
The optical FAULT outputs are a signal, de-energizing of the FAULT relay, and Modbus (RS-485) output signal. If in the
'HART 1.25 mA’ setting (default), the FL5000 provides a 2.0 mA fault output. If in the ‘HART 3.5 mA’ setting, the FL5000
provides a 3.5 mA fault output. The setting can be selected via HARTor Modbus command.
After a COPM FAULT, a COPM check is performed every twenty seconds. The COPM will resume a once per 2-minute
check only after the obstruction is removed. For general information and current levels go to 5.6.8 Analog Output.
NOTE: Because the optical path is checked once every 2 minutes and requires two check failures to produce a FAULT, it
may take up to 4 minutes for the unit to detect an obstruction.
WARNING!
Dirty or partially blocked windows can significantly reduce the detector’s field of view and detection distance.
Failure to follow this warning can result in serious personal injury or death.
NOTE: Flame detector will still perform its safety functions, if possible, in COPM FAULT.