Sash Sensor Adjustments Or Replacement - Labconco Logic Vue User Manual

Sash Sensor Adjustments or Replacement

The enclosure uses four (4) magnetic switches to sense the position of both Hatches
and Sashes. When either of the Sashes are opened, the blower speeds will increase to
nominal to allow proper containment while a user is working in the enclosure. With both
Sashes closed, the enclosure can be set to run at a reduced airflow rate. Additionally, if
either Hatch or BOTH Sashes are open and the blowers are on, a Sash Alarm will
occur. The Sash Sensors and their respective magnets must be working correctly to
provide correct feedback. If the enclosure is not responding as described, adjust or
replace a Sash Sensor(s) by following these instructions.
1. Facing the front of the enclosure, remove the right side End Panels
(both upper and lower) as described earlier.
2. Locate the Sash Sensors along the front and rear face. Figure 11-4 identifies the
location of the Sensors (for orientation, the picture is the Front Sash Sensors).
3. Switch position (open or closed) can be confirmed with a continuity meter by
disconnecting the switch to be tested from the wiring harness. With the sash fully
closed, both switches should be closed. If the circuit is open, ensure the
Hatch/Sash is fully closed against the enclosure, then:
HATCH SENSOR
SWITCH POSITION:
CLOSED WHEN
HATCH CLOSED
LOWER SASH SENSOR
SWITCH 1 & 2 POSITION:
CLOSED WHEN
HATCH CLOSED
Figure 11-4
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