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

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OM0284 Page 44 of 72
Rev 2 July/2021
7.5.4
Airflow Calibrations
Failure to calibrate airflow to the specified requirements may
result in unsafe conditions of performance (i.e. product and/or
personnel protection, noise and vibration)
The NU-543E airflow calibration consists of adjustments to balance the airflow within the cabinet. THIS WORK
SHOULD BE DONE ONLY BY A QUALIFIED TECHNICIAN WHO CAN MEASURE THE AIRFLOW FROM THE FILTERS
WITH A SUITABLE VELOMETER.
NuAire provides two adjustments to balance the airflow within the cabinet.
These are:
a. PWM signal adjust via calibration parameter menu
b. exhaust filter choke
The PWM signal or blower speed adjustment establishes the motor speed controls curve starting point of the
programmed internal reference performance curve while the choke adjusts or balances the exhaust airflow as well
as makes up for filter resistance tolerances. Since it has been NuAire's experience that the filters may not "load"
evenly, choke adjustments may be necessary for proper cabinet airflow balance and performance.
DC ECM motor PWM signal DC voltage should also be monitored and recorded upon final calibration. The DC
voltage may be measured using a digital voltmeter. The two test points to measure DC ECM motor voltage are
located on the DC motor connector on the main control board.
CAUTION
!