Spectrex 20/20MU - Mini Flame Detector - Manual (Page 25)

Spectrex Inc. - SharpEye TM ML & MU Flame Detector Manual – TM 767100, Rev. A, April 2005
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4.3.3 Detector Default Set Up
The detector has five (5) functions that can be programmed according to customer
requirement at factory or at customer facility using software Host. The standard set
up (default) that the detector is programmed to if there are no specific
requirements are as follows:
Table 7: Default function set up
Detector default set up: 20/20ML 20/20MU
Delay A 3
Alarm Latch NO NO
Automatic BIT YES YES
Alarm BIT NO NO
4.4 Built In Test
4.4.1 General
The detectors’ Built In Test (BIT) checks the following:
• Electronics circuitry
• Sensors
• Window cleanliness
The detector can be set to perform the BIT automatically and manually or
manually only.
4.4.2 Principles
If the result of a BIT is the same as the current status of the detector (NORMAL or
BIT FAULT), the detector's status is unchanged. If the result of a BIT differs from
the current status of the detector, the detectors’ status is changed (from NORMAL
to BIT FAULT or from BIT FAULT to NORMAL).
Note: In BIT FAULT status, the detector can continue to detect a fire.