Sun Microsystems DGA 5000, Руководство оператора

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At the end of the measurement phase the screen will indicate whether
the leak check was successful or unsuccessful.
•
If the leak check has been successfully performed, unblock the probe
tip, store the Probe Sealing Tool in a safe place until it is required
again and press “Continue” to return to the
Gas Analyser
Maintenance Menu . If the leak check was unsuccessful, check the
sampling system for loose connections and/or damage and repeat the
test.
If the sampling system is in good order and the leak check is still not
satisfactory, an internal leak in the gas module is indicated. Contact your
SUN
®
dealer or Service Representative.
9.4 Gas Calibration Check
The Gas Calibration check tests the calibration of the gas measurement
system against a calibration gas of a known composition. This check
should be carried out by the operator as and when necessary using a
1% accuracy gas mixture of:
- 1.3
– 1.7% vol CO
- 10.5
– 11.55 %vol CO
2
- 540
– 660 ppm vol HC.
Note:
The Gas Calibration Check should not be confused with the full gas
calibration that should only be carried out by a SUN Service Engineer.
The DGA 5000 system may be set to specify that a full gas calibration be
performed at specified intervals (normally once every 12 months). If such
a setting has been entered into the system, the unit will give a warning
that a full gas calibration is required.
• Select the “Gas Calibration Check” option from the
Gas Analyser
Maintenance Menu .
The Gas Calibration screen will be displayed holding two drop-down
menus (“Lambda calculated for” and “HC represents”) and
measurement fields for CO, CO
2
, HC, NO, O
2
and lambda.
• Select a fuel type from the “Lambda calculated for” drop-down menu.
The alternatives (Petrol, LPG, and CNG) represent the three possible
fuel types available.
• Select a gas mixture from the “HC represents” drop-down menu.
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G
AS
C
ALIBRATION
C
HECK