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M-GDA-4350 V12 Rev 1.1
4. Operation
When power is applied the sensor goes through a power up procedure as detailed below.
Please note that the
current o/p is not valid for approximately 2-4 minutes from the
power being applied.
During the 2-4 minute power up the current output of the GDA 4350 may reach the full
scale of the set output. Ensure that this does not affect external equipment.
LED
LED STATE
FUNTION
ON
Power is present
OFF
Power is not present
GREEN ON, BLUE
FLASHING,
YELLOW ON
The sensor is in its warm up period (approx 2~4
mins) during this period the sensor o/p is 0.45mA
GREEN ON, BLUE
FLASHING
Normal operation the sensor has stabilised and
the 4-20ma reflects the amount of gas present
GREEN & RED ON This indicates a fault associated with the sensor.
The o/p current is reduced to 1.2ma
Table 2: LED Status
Figure 4: Status LED Location
