Sun Microsystems DGA 5000, Руководство оператора

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Due to the chemical processes within the O2 cell it has a limited life. The
current status of the cell may be derived from its output voltage which is
monitored by the unit software. If the output voltage falls below 7.5 mV
the unit will display a warning that the cell will soon require replacement
(“Pre-warning – change O
2
cell”). The unit will display an error message
that cell must
be changed if the output voltage drops to 7 mV (“Change
O
2
cell”). The condition of the cell may be checked at any time by using
the O
2
Check/Install facility built into the software.
To check the status of the cell:
• Select the “O
2
Check
/Install” option from the
Gas Analyser
Maintenance Menu .
The
“O
2
Check/Install” screen will be displayed showing the message
“CHECKING O
2
CELL
– PLEASE WAIT” .
Figure 10-8 O2 Sensor Status Check
•
The unit will proceed to determine and display the cell output voltage
and will show the cell status as follows:
- Output voltage 7.5 mV or more
– “Acceptable O
2
cell”.
- Output voltage between 7.0 mV and 7.5 mV
– “Pre-warning
change O
2
cell”.
- Output voltage less than 7.0 mV
– “Change O
2
cell”.
- Output voltage
–2.5 mV – “No O
2
cell
connected”.
• Press “Exit” to return to the
Gas Analyser Maintenance Menu or
“Continue” to proceed with the installation of a new cell .
60
C
HECK AND
/
OR
I
NSTALL THE
O2 C
ELL