NuAire LabGard NU-581-400, Operation And Maintenance Manual

Page: 18 / 107

OM0302
Rev 2/December 2020 Page 18 of 107
6.0 Operating the NU-581
6.1 TouchLink™ Control System
6.1.1 Overview
The Biosafety Cabinet Control (BSCC) system is designed to service the control requirements of the NU-581
Biosafety Cabinet. The control system is a self-contained microprocessor driven module that will perform the
following functions:
•
Easy user interface via TOUCHLINK LCD
•
Control DC ECM motor/blower via solid state DC motor controller
• Monitor, display and control downflow, via digital dual thermistor airflow sensor
• Monitor and display exhaust flow (inflow) via digital dual thermistor airflow sensor
• Alarm setpoints, high/low for error conditions (downflow and exhaust flow)
• Date/Clock display and timer function
• Control lights via solid state switch
• Control outlets via solid state switch
•
Complete diagnostic functions
The NU-581 TOUCHLINK Control system offers the latest dual microprocessor design technology for improved
cabinet performance and safety. The control system uses a digital dual thermistor airflow sensor in the downflow
stream to monitor and control airflow to setpoints. The control system automatically compensates for filter
loading, voltage variances and other environmental effects. A second digital dual thermistor airflow sensor in the
exhaust airstream monitors for inflow velocity. Both downflow and inflow are displayed on the TOUCHLINK LCD
screen. The control system also monitors the sliding window position with a micro switch for both window high,
low and window closed positions.
The control system through the use of the front panel controls the on/off function of the LED and ultraviolet lights
(optional), outlets and DC ECM motor/blower. The control system also allows contact closure outputs for
interaction with HVAC systems to optimize environmental performance.
User interface to the BSCC system is accomplished via the TOUCHLINK LCD. Basic use of the BSC is accomplished
via the icons located along the top of the screen as shown below. Touch an icon to turn on/off functions as
indicated. Each icon will illuminate with color to indicate when the function is turned on. The menu icon will
always prompt a menu screen to display. Selecting a menu item will continue the prompts until the desired
parameter is achieved. To return to the main menu screen, press the MENU icon repeatedly to reverse out of the
parameter menus. To return to the home screen, press the home icon.
HOME
SCREEN BLOWER
UV
LIGHT
FL
LIGHT
OUTLET MENU