Sun Microsystems DGA 5000, Руководство оператора

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Note:
During zero-calibration the DGA 5000 derives the zero reference point
settings from the atmospheric conditions of the environment in which it is
operated. If the operating environment is poorly ventilated, or if sources
of atmospheric pollution (e.g. petrol soaked rags etc.) are present in
close proximity to the unit, this may lead to the zero reference points
being set too high. This may, in turn, lead to vehicle emission readings
that are below the zero reference settings of the analyser (“negative
indications”). To avoid this problem, the operating environment should be
well ventilated and possible sources of atmospheric pollution should be
removed.
6.3 Daily Leak Check
The accuracy of test measurements will be compromised if ambient air is
allowed to enter the analyser sampling and/or pneumatic systems. In
order to ensure the integrity of the system, the standard software
configuration requires that a leak check should be carried out prior to the
commencement of each day‟s operation. The unit will not be capable of
normal operation unless a successful leak check has been carried out
within the preceding 24 hours. If the operator fails to carry out a daily
leak check, or if a leak check is failed, an error warning will appear in the
toolbar and all gas measurements will be blocked until a satisfactory leak
check has been performed.
Note:
If the unit is left running continuously, the standard software configuration
will require a leak check to be performed within 24 hours of the previous
check. If the unit is switched off (e.g. overnight) the software will require
a leak check at the start of each operating day even if the previous leak
check was performed within the last 24 hours.
Note:
The daily leak check requirement may be deactivated by Sun service
personnel unless the unit is configured for an approval type under which
such a check is mandatory
The leak check requirement may be satisfied by the successful
performance of either:
- A Leak Check (Vacuum) (see 9.2 ), or
- A Leak Check (Gas) (see 9.3 ).
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