Agilent Technologies 8000 Series Manual del operador Pagina 89

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Operating the 8000 4
8000 Operator’s Manual 89
6 Purge Time (peristaltic
pump)
If your system configuration includes the peristaltic pump, use this option to set the
interval the peristaltic pump runs in reverse to return the uncollected medium in each
line back into the vessel from which it was drawn.
Select option 6, Purge Time. Enter a value for the purge time from 1 to 99 seconds and
press ENTER. The Program Variables screen displays.
Note: Purging also clears the sampling filters of particulate matter that may restrict
successive samples. As with priming, the longer the tubing lengths, the longer the
purge time required.
6 Purge Volume (syringe
pump)
If your system configuration includes the syringe pump, use this option to set a purge
volume that ensures all stranded medium is properly expelled.
Select option 6, Purge Volume. Enter a value for the purge volume that ensures at least
two strokes of the syringe plunger and press ENTER. The Program Variables screen
displays.
Note: The first stroke moves all medium from the sampling lines to the return lines.
The second stroke draws air into the sampling lines and purges the remaining medium
from the return lines. As with priming, the longer the tubing lengths, the larger the
purge volume required.
7 R-M (peristaltic pump) If your system configuration includes the peristaltic pump, select option 7, R-M. The
Replacement Media Option screen displays. Select option 2, Disable. The Program
Variables screen displays.
Note: The replacement media option is not available for use with the Apparatus 3 / 7.
The replacement media option must be disabled or the instrument will not operate
properly.
Table 2 2 Program Variables Options (Apparatus 3 / 7)
Option Function
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