Enmet OMNI-4000 Manual do Utilizador Página 55

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OMNI-4000 S/N 6705 and above ENMET Corporation
49
Selecting the Maintenance Menu
Turn the device On and position the maintenance switch towards the center of the instrument. See Figure 3-10.
Figure 3-10: Position of Maintenance Switch
Replacement of Explosive Gas Sensor
The display shows: "Program a Sensor" to signal access to the Main Maintenance Menu.
N
OTE: Insufficient battery voltage prevents access to the main menu. The operator is warned with a "Maintenance
impossible" message. It is possible to continue by connecting the charger or by changing the battery pack.
Selecting The "Replacing an Explosive Gas Sensor" Menu
The display shows:
Press the MENU switch twice. The display shows:
Confirm the selection by pressing ENTER. The display shows:
Inputting the Calibration Gas Value
This procedure defines the content of the gas to be applied to the sensor during the calibration operation. The
maximum permissible concentration is 100% LEL CH
4
.
The display currently shows: "Calibration gas." To change the displayed value:
Select the units by repeatedly pressing the MENU switch. When the desired number is displayed, press
BACKLIGHT switch.
Select the tenths by repeatedly pressing MENU switch. When the desired number is displayed, press
BACKLIGHT switch.
Select the hundredths by repeatedly pressing MENU switch. To return to the units or tenths of a unit, press
BACKLIGHT switch. When the complete number is displayed, press ENTER.
The value of the calibration gas to be applied is memorized.
Program
a sensor
Change
comb. sensor
Calibration gas
20% LEL CH4
Maintenance Switch
Slide Right for Maintenance
Maintenance Switch
Slide Right for Maintenance
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