Spectrex 20/20SH - Hydrogen Flame Detector - Manual (Page 42)

Spectrex Inc. - SharpEye TM Hydrogen (SH) Flame Detector Manual – TM 784600, Rev. A, May 2005
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7.4.1 Manual BIT Test
Important Note!
If the function setup “Alarm BIT” and/or “Accessory BIT” are in YES, then the
Alarm, Accessory Relay and 4-20mA Output will be activated during a manual
BIT, therefore, automatic extinguishing systems or any external devices that may
be activated during BIT must be disconnected.
1
Verify that the detector is operated properly.
2 Initiate manual BIT. After a few seconds the following occurs:
• Alarm Relay will be activated and the 4-20mA output turns to 15mA for
3 seconds (only if SW1-4 is ON).
• Accessory Relay will be activated and the 4-20mA output turns to
10mA for 3 seconds (only if SW1-5 is ON).
• The 2 LEDs should be ON.
• Fault Relay will stay active during the test.
7.5 Safety Precautions
After Powering-up, the detector requires hardly any attention in order to function
properly, but the following should be noted:
1 Follow the instructions in the manual and refer to the drawings and
specifications issued by the manufacturer.
2 Do not expose the detector to radiation of any kind unless required for testing
purposes.
3 Do not open the detector housing while power is supplied.
4 Do not touch internal parts. Interference with internal circuits may impair
detector performance and will invalidate manufacturer's Warranty.
5 Disconnect external devices, such as automatic extinguishing systems before
carrying out any maintenance.