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6 - 8
Main Menu
In the Leak Measure and Control modes the display shows and provides further selections.
[Rate Timer]
•
The Rate Timer starts an internal timer for a pre-defined set of times. On the completion of
the time period, the display shows the average rate of change over the time period.
•
The pre-defined time period with an associated wait period allows pressures to settle before
the timing starts. The wait period counts down to zero before the time period starts.
Rate timing
•
Press LEAK MEASURE/CONTROL to select Leak Measure mode and, from the main menu,
select [Rate Timer]. The display shows the default time of 1.00 minutes and a wait time of
1.00 minutes. Select each in turn and using the numeric keys change the time and rate time
to the required values.
•
Select [Start Timing] to begin the test. The display shows "Waiting: 0.00" at the bottom of the
screen and counts down the waiting period. The display then changes to "Timing: 0.00" and
counts down the timing period. After the timing period the ROC and RtCAS changes to Timed
Leak Measure and shows the units/min leak rate.
•
Pressing one of the parameter keys (e.g., ALT/Ps, ROC/RtPt, SPEEDQc etc.,) or QUIT/CLEAR
cancels the Timed Leak Measure display and returns to the Leak Measure display.
•
At any time during rate timing or when a timed value is displayed, selecting [Rate Timer]
allows for either the restarting or cancelling of the timing. When timing is cancelled, the rate
displays returns to instantaneous values.
•
The timed average value remains until a new aim is entered. During this time, it is possible to
view any parameter.
K0260 Issue No. 8
Reference and Specification
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