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6
SECTION 3
GENERAL OPERATION
The main on/off switch is located on the right-hand side near the top of the cabinet.
When first turned on the LCD control panel will be displayed providing operator
information relating to cabinet use.
CONTROL SYSTEM
The cabinet is controlled and monitored by a microprocessor with an LCD touch
screen. The touch screen provides the operator with general information about the
cabinet and displays the current face velocity and status. Control of light level, fan
on/off and other operating settings are all accessed via a menu system. To ensure
containment is always maintained and for increased energy efficiency, a constant
velocity, variable air volume (VAV) system is employed. This varies the volume of air
passing through the cabinet to maintain a constant face velocity regardless of the
sash position. The control system is factory set to maintain the following parameters:
Normal velocity:
0.55m/sec. (Velocity measured at the aperture)
Low velocity:
0.35m/sec.
Low airflow alarm: 0.30m/sec.
These settings can be changed by a Monmouth engineer. Please contact Monmouth
Scientific for further advice.
START-UP
When first turned on the screen below is displayed providing system status.
Additional cabinet information can be displayed by pressing the
key.