NuAire LabGard ES NU-543-300S, Руководство по эксплуатации и обслуживанию

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OM0239 Page 52 of 72
April 2021
Step 2: Using the primary or secondary inflow test method, lower the speed control voltage to reduce the
inflow by 20% from the certified testing value.
Step 3: Verify that the alarm activates when the inflow is dropped to this point.
Step 4: Adjust alarm setpoint as necessary as instructed by the alarm manufacturer procedures.
Step 5: Return the speed control to its certified operating voltage as measured by the voltmeter.
7.8.3 Exhaust System Performance
Canopy Exhaust Transitions
Step 1: Introduce a visible medium source into the canopy air intake(s) while slowly reducing the exhaust
volume until there is a loss of capture of the visible medium into the canopy air intake(s).
The audible and visual canopy alarms shall respond within 15 seconds, and the cabinet fan(s) will
continue to operate.
Step 2: Return exhaust volume to original value.
NOTE: Positive pressure ductwork conditions are strongly discouraged. Positive pressure ductwork conditions
should be reviewed and evaluated by a cognizant Safety Officer of Industrial Hygienist as part of their
Laboratory Ventilation Management Program and Chemical Hygiene Plan.
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