Casella CEL Environmental enclosure for Microdust - Manual (Page 4)

Page 4 of 20 Page 17 of 20
VORTEX Pump Introduction
1. ENVIRONMENTAL ENCLOSURE FOR THE
MICRODUST pro
1.1 Introduction.
With the increased awareness of environmental pollution from fine
particulate and the introduction of the Air Quality legislation throughout the
world, the demand for portable real-time monitors of PM 10 and PM 2.5 has
increased. The need for real-time particulate information is also a
requirement in general industry, when looking at Total Suspended Particulate
(TSP), and at inhalable and respirable dust levels as a health issue.
CASELLA CEL have introduced the
Environmental Enclosure for exactly this
application. This accessory provides a
simple solution to fixed site monitoring
with the Microdust pro and can be used for
internal or ambient applications.
When monitoring ambient conditions, this
system should not be used under
conditions of high humidity, condensation,
rain or fog - the APM is recommended for
use under such conditions.
The IP65 case is designed to accommodate
a standard Microdust pro as well as a
sampling pump system to maintain a
precise inlet flow rate. The pump also
provides purge air to the measuring optics,
which is an important feature to maintain
long term reliability.
The Environmental Enclosure has been
designed as an accessory for existing
Microdust pro users as well as for potential
customers looking for a complete system.
The complete system would require the purchase of the Environmental
Enclosure kit PLUS the following additional items:
Microdust pro,
PUF – Polyurethane Foam Filters,
Suitable Flow Meter Kit and Sampling Filters.
The key component to this accessory is the sampling inlet which utilises PUF
size-selective filter techniques. Size-selective filters were originally developed
for operation in the Conical Inhalable Sampler (CIS) as detailed within the
Figure 1:
The Microdust pro
SYMPTOM POSSIBLE CAUSE SERVICE HINT
Pump runs but NO AIR
drawn
Diaphragm RUBBER
SPLIT.
REPLACE.
Pulsation damper
MEMBRANE SPLIT.
RENEW pulsation
damper.
TUBE between
pulsation
damper and valve
chest SPLIT or
DISCONNECTED.
REPLACE.
Pump runs but
CANNOT ACHIEVE
DESIRED FLOW RATE
LEAK on pump
assembly.
LOCATE & correct.
DIRT under valves or
valve DAMAGE.
CLEAN / REPLACE.
Inlet FILTER
CLOGGED.
REMOVE & CLEAN.
Flow
POTENTIOMETER
inoperative.
REPLACE circuit
board.
Flow RATE NOT
MAINTAINED through
full working shift
INCOMPLETE
CHARGE.
RE-CHARGE.
Battery BELOW
CAPACITY.
FULLY CHARGE &
check voltage.
It should be at least
12.0 V.
If below, CHECK
OUTPUT from
charger.
If output is correct,
REPLACE
BATTERY.
High current
consumption due to
MECHANICAL
DEFECT in pump.
LOCATE &
CORRECT.
Filter DISC
CLOGGED.
REPLACE.
ENVIRONMENTAL ENCLOSURE
For MICRODUST pro - User Manual ENVIRONMENTAL ENCLOSURE
For MICRODUST pro - User Manual