Manual

SharpEye

Single IR Flame Detector User Guide

14 Internal Detector Tests

• Processor Watch dog

• Software

• Memory

• Oscillator frequency

Response to Fault Indication

If a failure is found, the detector indicates by:

• Fault relay:

• Opens in wiring option 1, 2, and 4

• Closes in wiring option 3 and 5

• 0-20mA: indicates Fault (0mA or 2mA) in wiring option 1, 2, 3

• LED – Yellow flashes (4 Hz)

• 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:

• Electronics 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.

1.6.2.1 How the BIT Operates

• The detector's status remains unchanged if the result of a BIT is the

same as the current status (NORMAL or BIT Fault)

• the detectors’ status is changed (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.