Version 2.6
Operating instructions
AFGUARD
®
Zone 0 and Zone 1
Page:
21
of:
41
FAUDI Aviation GmbH, Scharnhorststraße 7 B, D-35260 Stadtallendorf
BA_AFGUARD_Ex_rev2.6_Englisch_l
ogo
5 Operation
5.1
Mode of Operation
The AFGUARD
®
is an inline Sensor to detect the content of free water phases in Jet Fuel.
The principle of measuring can be described as refraction index bases IR scattered light
effect.
Operation:
Clean Fuel:
Pulsed IR light
– (Transmitter A) leaves the optics under defined refraction
index, passing through the Jet Fuel until the mirror is reached, being reflected, and going
back to the optics where the signal intensity is being measured. The difference between
transmitted and received light intensity will be handled for:
Internal adjustment, for example if there is some debris on the optics or the mirror caused by
dirt in the Jet Fuel.
Self Check of electronics.
As long as there is no free water in the measuring zone, there will be no scattered light.
