ENMET OMNI-4000 User Manual
Page 26
ENMET Corporation
OMNI-4000 S/N 6705 and above
20
Auto Set Not Possible
If the ambient temperature is below 0
°C or above 45°C or if the batteries are too low, the self-adjustment procedure
cannot be performed. The display shows:
Auto Set Performed
• With the exception of the oxygen reading set at 20.9%, the other readings are automatically set at a useful value:
• If the tests are negative, the device triggers an alarm, the rapid beeping and blinking of alarm indicator lamps.
Otherwise, the device is ready for use.
N
OTE
: The auto set procedure is not time limited, i.e. the operator must exit it, one way or the other.
2.2.5 Readings
This paragraph describes the operations performed in the gas reading mode.
2.3 Lighting
Reading in poorly lit areas is facilitated by pressing the BACKLIGHT switch. The backlighting of the display allows
the data to be seen clearly. It is automatically turned off after fifteen (15) seconds.
The backlight can be used in hazardous environments, those containing explosive gases, as the OMNI-4000 has the
required Intrinsic Safety Approval.
2.3.1 Displaying the Instantaneous Readings
In automatic operation, all instantaneous readings concerning the gases are constantly displayed.
The display is divided into four independent quadrants, each of which corresponds to a sensor or "channel."
Quadrant no. 1
Channel no. 1
Quadrant no. 2
Channel no. 2
Quadrant no. 3
Channel no. 3
Quadrant no. 4
Channel no. 4
Figure 2-8: The Quadrants of the Display, Corresponding with Four Channels of Gas Detection
The display capacity is limited in each quadrant, therefore the readings are displayed alternately as follows:
• Reading: Sensor gas symbol
• Reading: Unit of measurement
Thus the operator sees alternately displayed:
• The quantity and chemical description of the gases that can be detected
• The quantity and unit of measurement of the gases that can be detected
Auto set
Not possible
0 LEL
0 ppm
0 ppm
20.9
0 LEL
10 ppm
0.0 ppm
20.9%
1
2
4
3
1
2
3
4
0 LEL
0 ppm
0 ppm
20.9