Ecotech HiVol 3000

Introduction HiVol 3000 User manual 1.7
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1.5 Instrument Description
1.5.1 Sampler Housing
The HiVol housing and inlet hood are constructed in aluminium,
providing a light-weight and non-corrosive housing, even in the event of
exposed metalwork. The enclosure comprises three main parts: the inlet
hood, the outer enclosure and the electronic enclosure (housed inside the
outer enclosure.) The HiVol 3000 is constructed from marine grade
anodised aluminium, which provides good durability in most
environments. All fasteners are stainless steel.
Two front doors are fitted. The lower door can not be opened with the
upper door in the closed position. A keyed lock is fitted to the upper
door. The lower door is also retained by a sliding latch, which engages a
slot in the side panel. Slide to the left to retain the door in the upright
position.
1.5.2 Blower Motor
The blower is driven by a squirrel-cage induction motor, and is
constructed of cast aluminium achieving a weight saving and also
providing corrosion resistance. Silencers are mounted on both the inlet
and outlet, which reduces noise levels considerably. (Further noise
reduction can be achieved using the optional exhaust muffler – refer to
section 2.4.3) The blower is equipped with sealed-groove ball bearings,
which do not need lubrication. The grease filling is sufficient for the
whole service life of the bearings.
1.5.3 Flow Path
The inlet funnel for the sampler is constructed of fibre glass, which
provides a gradual change in flow geometry ensuring an even pressure
gradient and avoiding flow resistance and noise. The design also enables
equal flow-rates through the whole cross section of the filter. Following
the funnel, a joining sleeve is provided to allow for easy access to the
flow sensor and to aid in removal of the blower motor. All tubing is
PVC. Fittings are available for connection of an external exhaust duct.