LI-COR LI7200RS, Инструкция по эксплуатации

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Flow Module Maintenance
The flow module requires little routine maintenance.
Changing the Fuse
The fuse in the 7200-101 case can blow if power is applied with reverse polarity.
Open the instrument case and unscrew the fuse cover to replace the fuse. The
replacement fuse is a 5 A fast-blow, 125 V, 5x20 mm type, available from LI-COR
under part number 439-04214.
Figure 5-7. Unscrew the fuse cover to replace the fuse.
Cleaning the Air Filter Screen
If the Flow Module is set to maintain flow (e.g., F15.0) and the filter screen
becomes clogged with debris, the Motor Drive and Pressure Drop readings will
increase, as the motor will have to work harder to maintain the desired flow rate
(see
Figure 5-9 on the next page and Figure 5-10 on page 5-17).
If the Flow Module is set to constant blower drive (e.g., C25), the blower drive will
remain constant, but the measured flow rate will drop. Unscrew the cap on the fil-
ter, remove the screen, and clean with water or compressed air. Clean any remain-
ing debris from the body of the filter, and replace the screen. There is a
replacement screen in the spares kit under part number 301-10382.
Section 5. Maintenance
5-15 Flow Module Maintenance