MRBP.425241.001 UM version 1.1 01.05.2022 FD 329/330-3-
1 «Vega»
22
For switching, it is necessary to:
- put the magnet to the recess on the detector (see figure 12) (a click will be heard),
- turn off the power for 5 seconds,
- turn on the power and remove the magnet in 5-10 seconds.
9.1.2 Automatic mode
Sensitive elements functionality is checked every by means of built-in test radiation
sources, the radiation from which falls on them directly. To improve the FD 329/330-3-1
«VEGA» reliability the degree of the optics dustiness is controlled by changing the intensity
of the radiation of a special optical element that has passed through the entrance windows.
The glow mode of the red LED indicators, installed on the front of the detector, indicates
the FD 329/330-3-
1 «VEGA» status. The list of the procedures for detector’s electronics
self-
testing includes each channel’s noise level control within 10 minutes after switching
on, as well as 8 hours continuously when a change in this signal is detected. When the
above faults are detected, the detector turns off the
«FAILURE» relay, blocks the «FIRE»
signal output and turns on the
«FAILURE» light indication on the front panel of the
detector. Noise level control along with self-testing every 30 minutes is guaranteed to
detect a malfunction of the IR and UV channels sensors.
The constant glow of one of the LEDs in the absence of a flame or other sources of IR
and UV radiation indicates a malfunction of one of the sensors or the presence of a
background-modulated flare with an intensity exceeding the channel threshold.
The IR channel threshold value is
«floating» and is fixed at the moment of UV channel
signal increase. This property makes it possible to measure the signal in the IR channel
relative to the level of the modulated background IR radiation, i.e. in interference
conditions.
Also, to reduce the time for issuing the
«FIRE» signal, at the moment of signal increase
in the UV channel, the indication of
«STANDARD» state is turned off.
9.1.3 Detector set up test program
Detector set up test program, besides the actual FD 329/330-3-
1 «VEGA» functionality
check, to additionally configure some parameters of its operation. For example, depending
on the characteristics of a particular operation object, the user can programmatically
control the degree of dustiness of the optics, activate the automatic heating mode of the
optics, and also configure other performance parameters of the FD 329/330-3-
1 «VEGA».
Using test programs, it is possible to switch the operating mode from Modbus to
HART, as well as from HART protocol to ModBus protocol.
Switching is performed using the
«HARTOn» button on the main tab,
Switching from HART to Modbus is performed via Dev-I
ce setup →Deta-Iled setup
→Sensors→Dev-Ice flags→Sett-Ings→Sw-Itch to Modbus →on → Enter→Send
