NuAire LabGard NU-581-400, Руководство по эксплуатации и обслуживанию

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OM0302
Rev 2/December 2020 Page 66 of 107
7.8 Site Installation Assessment Tests
These tests are performed to verify the sash position, airflow or pressure setpoint where an audible and/or visual alarm will
activate to signify unfavorable operating conditions within the Biosafety cabinet and/or the remote exhaust blower, and
canopy connection performance.
7.8.1
Sash Alarm
Step 1: With sash alarm switch enabled, raise the sliding sash 1” (2.5cm) above the manufacturer’s
designated sash height for normal operation. Verify that the audible/visual alarm activates/sounds.
Step 2: Return the sash to its normal operating height.
Note, if necessary, adjustment of the sash alarm switches can be accomplished by:
Behind the right side faring there is a cover panel that needs to be removed.
Then you can access the microswitches and adjust the trip point. Adjustment
is not just vertical, but as you see in the following picture, we have allowed tolerance for rotational
adjustment too. Sometimes how the window switch roller is positioned
will affect its activation point.
Use a nut driver to loosen the switch plate, adjust and re-tighten
7.8.2 Airflow or Pressure Alarm (when installed)
Step 1: Measure and record the speed control operating voltage at the speed control test points using a
voltmeter.
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.
7.9 Cleanliness Classification Test for Pharmacy Application
If this cabinet is going to be used within pharmacy, per USP797 1 , the cabinet must be tested to assure compliance to ISO
14644-1:2015 Cleanrooms and Associated Controlled Environments, Part 1: Classification of Air Cleanliness 2 . The
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