Labconco Type C1 Biosafety Cabinet Models 30468 - Manual (Page 98)

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Sash Position Switches
Four microswitches are used to indicate the sash position. The switches are the same,
Labconco part # 3832400. A photo of the switches is shown in Figure 6-6.
Figure 6-6
Sash Closure Position Switch
Sash Restricted Opening Switch
8” Sash Operating Position Switch
10” Sash Operating Position Switch
Sash Closure Position Switch
The sash closure position switch signals the display microprocessor that the sash
is open or closed allowing proper operation of the Blowers, fluorescent or UV
lights. It is wired in the normally open configuration. If the switch does not
actuate properly when the sash is within ¼-inch of being fully closed, ensure the
switch follower is properly actuating against the weight. See Figure 6-7.
Sash Restricted Opening Switch
The sash restricted opening switch signals the display microprocessor that the
sash is about to close. When actuated, the blowers are shut off to prevent the
exhaust blower from forming a vacuum when the sash is closed. If the switch
does not actuate properly when the sash is within 2 inches of being fully closed,
ensure the switch follower is properly actuating against the weight. See Figure 6-
7.