Atec 8001, Руководство по эксплуатации и обслуживанию

Страница: 18 / 59

12 Atmospheric Technology
to terminate the routine and to save the new settings. The touch screen should be
re-calibrated whenever it becomes difficult to activate buttons on the screen.
Set
Pressing the Set button saves the data that was entered in the Set-up screens and
returns the program to the main screen.
4.3 Schedule
The Schedule tab is used to enter sampling schedules for the canisters. When the
Schedule tab is pressed, a yellow screen appears which shows the start date, start
time, and sample duration for Port 1. The values in each box can be changed by
touching the text box and using the keypad to enter the appropriate values. All times
are military times with midnight as 00:00. A 24-hour sample would be entered with a
start time of 00:00 and a duration of 24:00 hours for the date entered in the “date”
box. An identification label (e.g. Can 13420, Cart A6672) can also be entered for
each canister. This label will appear with the data to identify each sample. If the
sampler has the trigger option, the Schedule screen will have a check box to
activate the trigger option for the displayed Port/Channel. If this check box is
checked, the Port/Channel will start sampling for the specified duration when the
trigger is activated (see the section on Trigger Option for more details on this
option). If only one canister is to be sampled, the Done button is pressed and the
sampler will return to the main screen.
When making test runs, the start time for a Port/Channel must be at least one
minute plus the amount of purge time in the future or else erroneous MFC zero
values will be determined. Prior to purging, the sampler fast samples the MFC
flows to determine stable zero values for the MFCs. If this time is short or
non-existent, the zero values will be in error and any sampling data will also
be in error .
If additional ports/channels are to be sampled, The Next button must be pressed to
display the schedule for the next port. For each subsequent port, the start date, start