Spectrex 20/20SH - Hydrogen Flame Detector - Manual (Page 41)

Spectrex Inc. - SharpEye TM Hydrogen (SH) Flame Detector Manual – TM 784600, Rev. A, May 2005
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7. Operating Instructions
7.1 Scope
The following instructions are designed to obtain optimal performance from the
detector over its life cycle.
7.2 Power-Up
1 Apply power and wait approximately 60 seconds for the automatic self-test of
the detector.
Note: Applying power initiates the following sequence:
• POWER LED flashes
• BIT is executed, if successful then
• POWER LED turns ON continuously
• FAULT relay contacts close
2 Wiring Inspection: If a short-circuit or line discontinuity exists, indications will
appear on the control unit display panel. Review your wiring.
3 The detector goes into its FAULT state when supply voltage drops under
16.5V. The detector status goes back to NORMAL, when the supply voltage is
above 17.5V.
4 Detector Inspection: Visually inspects the viewing window of the detector. It
should be clean and clear. The POWER LED should be ON and the ALARM
LED should be OFF. The ALARM and ACCESSORY relays should be OFF
and the FAULT relay should be ON. The 4-20mA Output should be 5mA.
5 If any of the outputs or indications are different from the description in step 4,
see paragraph 8.6.1 for troubleshooting.
The Flame Detector is now ready for Functional Testing.
7.3 Reset (if optional latching operation selected)
To RESET a detector when in its ALARM state, disconnect power (terminal No. 1
or terminal No. 2), or initiate a manual BIT.
7.4 Functional testing
Following is a testing procedure for proper functioning of the detector. The
detector can be tested using the Manual Built-in-Test.