Atec 8001, Руководство по эксплуатации и обслуживанию

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Atmospheric Technology 13
time, duration, and trigger option can be entered. If the port sampling time is to
follow immediately after the previous port and is of the same duration, the
information can be entered automatically by checking
the box labeled “Follow the
previous port”. After all the ports are displayed, the data for Channel 2 can be
entered. The Done button can be used to return to the main screen at any time.
The Prev button will show the previous screen.
4.4 Leak Check
The Leak Check tab is used to verify the canister connections prior to sampling.
The first screen is identified as “Port 1 Leak Check” and is used to leak check the
Port 1 canister. Canisters are leak checked by attaching an evacuated canister to a
port. The canister valve is then opened and then closed prior to pressing the Start
button for that port. If a leak is present between the canister valve and the isolation
solenoid valve, the manifold pressure will start to rise. A leak is identified if the
pressure rate exceeds the leak rate limit set in the setup section.
NOTE: Prior to pressing the Start button to begin the leak check on a port, the
canister solenoid valve on that port must be opened and then closed.
The Start button is pressed to begin the leak check. The leak rate box will show
“testing” during the measurement period. The canister leak check runs for 60
seconds. During this time, the pressure and elapsed time will be displayed. If the
pressure rate is above the leak rate limit entered in the Setup screen at the end of
the test, a “Failed” message is displayed. If a canister fails, the test should be
repeated to verify the first test. After repeated failures, the fittings should be
checked and the canister re-tested or replaced. If the test passes, a "Passed"
message will appear on the screen and the leak rate is displayed. The test can be
repeated by pressing the Start button, or the Next button can be used to advance to
the next port or Channel 2.
4.5 Data
The Data tab is used to display or download data. After sampling has been
completed, the Data tab
is touched and the “Port 1 Data” screen is displayed. The