NuAire LabGard ES NU-543-300S, Operation And Maintenance Manual

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OM0239 Page 20 of 72
April 2021
6.0 Operating the NU-543S
6.1 FlowGard ™ Control System
6.1.1 Overview
The FlowGard™ electronic control system is designed to service the control requirements of the LabGard® ES
NU-543S Biosafety Cabinet. The control system consists of an electronic module that will perform the following
functions:
•
Easy user interface via OLED (Organic Light Emitting Diode) display/function keys
•
Language selectable user interface menu’s (English, Spanish, German, French, Chinese, Japanese)
•
Control blower via solid state switch.
•
Control lights via solid state switch.
•
Control outlets via solid state switch.
•
Disable audible alarm switch with ring back function.
•
Control blower DC ECM motor with solid-state DC Motor Controller that provides automatic
compensation (constant volume control) for both filter loading and line voltage variances.
•
Monitor and display airflow velocity performance via Intelliflow Monitor.
•
Display time of day and temperature.
The LabGard® ES NU-543S offers the latest digital microprocessor design technology for improved cabinet
performance and safety. The
FlowGard™ control system integrates a dual thermistor airflow sensor (Intelliflow) to
monitor the cabinet’s airflow performance. The FlowGard™ control system also integrates a DC motor controller
that provides automatic compensation for both filter loading and line voltage variances. There is additional on/off
control of blower, fluorescent light, ultraviolet light (optional) and outlets. Lastly the control system monitors the
sliding window position with micro switches. All the above functions are shown in a system block diagram (see
figure 1).
Figure 1