Azbil AUR450C - Ignition Spark Response Test

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Chapter 4. TRIALRUN ADJUSTMENT
 Ignition spark response test
WARNING
Make sure that the AUD300C/500C does not detect ultraviolet rays other than those of the
burner. If the AUD300C/500C responds to other ultraviolet rays, flame failure in the burner will
not be detected. As a result, fuel will continue to be discharged, causing a serious explosion
hazard.
(1) Close the manual fuel valves of the pilot and main burners.
(2) Begin operation and measure the flame voltage in the pilot ignition sequence
to check whether or not the flame voltage is influenced.
(3) If the FLAME LED is lit, make adjustments using the following procedures
while referring to the instruction manual for the equipment:
• Move the AUD300C/500C or ignition spark rod so that there is no influence.
• Put a shielding plate in the optical path of the AUD300C/500C so that the ef-
fect of the spark is a flame signal of 0.4 V DC or less.
Handling Precautions
•
Be sure the AUD300C/500C does not detect ultraviolet rays other that those of
the burner flame.
The following shows various ultraviolet ray sources other than the burner flame
that may activate the AUD300C/500C:
Ultraviolet ray source Red-hot furnace walls (1371 °C or more, within 50 cm of
furnace wall)
Ignition transformer and welding arc
Gas laser
Sunlamp
Disinfecting lamp, ultraviolet lamp, fluorescent lamp
Strong flashlight (toward UV sensor)
Gamma-ray and X-ray source X-ray diffraction and gamma-ray analysis measurement
equipment
Electron microscope
X-ray camera
High voltage vacuum switch
High voltage capacitor
Radioisotope
Other sources producing ultraviolet rays, gamma-rays,
and X-rays