Spectrex SharpEye 40/40M, Руководство пользователя

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TM 40/40M, Rev (14) February 2017
Internal Detector Tests 31
 Relays and heater operation
 Processor watchdog
 Software
 Memory
 Oscillator frequency
Response to Fault Indication
If a failure is found, the detector indicates by:
 Fault relay:
 Opens in wiring options 1, 2, and 4
 Closes in wiring options 3 and 5
 0 – 20mA: indicates fault (0mA or 2mA) in wiring options 1, 2, and 3
 LED – Yellow flashes (4Hz)
 Correcting the fault
The fault indications remain until the detector’s power is removed. The fault
indications return if the fault is still found when power is restored.
1.6.2 Built-In-Test (BIT)
The detector’s Built -In-Test (BIT) also checks the following:
 Electronic circuitry
 Sensors
 Window cleanliness
The detector can be set to perform the BIT in the following modes:
 Automatically and manually
 Manually only
Note: In Manual BIT, the outputs may also be tested and Control System
“ inhibit ” should be applied if this could initiate other systems.
How the BIT Operates
1.6.2.1
 The detector's status remains unchanged if the result of a BIT is the
same as the current status (Normal or BIT Fault).
 The detector ’ s status changes (from Normal to BIT Fault or vice versa) if
the BIT differs from the current status.
Note: In “ BIT Fault ” status the detector can continue to detect a fire.