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Operating the Sliding Sash
The counterbalanced, anti-racking sash mechanism requires only a few pounds of force
to move the sash up or down. You can open or close the sash smoothly with one or two
hands positioned on either handle.
The sash position alarm and safety interlock system senses the sash position and acts
appropriately. The biosafety cabinet has been programmed to operate at either an 8-, 9-
, 10- or 12-inch (203-305 mm) sash opening, depending on model. Raising the sash
above its operating height will activate the audible and visual alarms. The audible alarm
can be temporarily muted (for approximately five minutes) by depressing and releasing
the
OK/Mute
button. Closing the sash back to its operating position will reset the alarm
and defeat the muting of the alarm. The safety interlock system senses when the sash is
closed and allows the optional ultraviolet (UV) lamp to operate only when the sash is
closed, to protect the operator from irradiation.
Starting the Biosafety Cabinet
1.
To start the biosafety cabinet, raise the sash until its bottom edge aligns with the
sash position label on the left corner post. The decal is shown in Figure 5-5.
2.
For Type A Cabinets: Press the blower button to start the unit. The unit will
display a standby screen for approximately 90 seconds to allow the cabinet to
reach proper operating conditions. If the alarm sounds, recheck the sash
position. If the sash is too high, the sash audible alarm and the LCD display will
indicate the sash is too high.
3.
For Type B2 Cabinets: Press the blower button to activate the display and
again to start the unit. If the exhaust flow is insufficient at startup, the Logic+
blower will not start, and the Status Display Window will display “airflow check”,
and continue to sample the exhaust flow. If the exhaust airflow is sufficient
within 60 seconds, the cabinet blower will then start, and the Status Display
Window will display the “please wait” message for approximately 90 seconds to
allow the cabinet to reach proper operating conditions. If the exhaust flow is
insufficient after 60 seconds, the audible alarm will sound, and the LCD display
will indicate an Inflow Alarm. The alarm can be reset by pressing the “Blower”
button again.
4.
To turn the optional UV light on, the sash must be completely closed to prevent
the escape of any UV radiation. Push the UV light button
to activate the UV light.
Note: The sash must be completely closed for the UV light to
activate.
Sash position label
Figure 5-5
