Ecotech HiVol 3000

HiVol 3000 User manual 1.7 Operation
37
3.4.2 Beginning sampling
1. Install a pre-weighed and numbered filter into the filter cassette.
Ensure the filter is centrally located on the support screen before
placing the top section of the cassette on the filter.
Note: 1. Check filter for pinholes or damage prior to
installation in sampler.
Note: 2. During adverse weather conditions filters
should be pre-loaded into filter cassettes in a
protected area prior to installation in sampler.
Note: 3. Filters are normally installed rough side up
with identification number located on the bottom
outer-most edge of the filter.
Note: 4. Filters may be fragile and should be
handled carefully. To prevent contamination filters
should be handled on their outer edges, using
gloves.
2. Insert the loaded filter cassette into the locating stop on top of the
sampler and close the inlet hood. The filter cassette is held in place and
sealed by carefully lowering the inlet hood onto the top of the cassette.
The filter cassette is clamped down by screwing the two thumb-screws
above the control panel into the inlet hood.
3. Program the timer and check that the clock is on the correct time.
Download the data from previous sample periods and clear the logger
if required. Refer to Section 5 & 3.5.2.4 if required.
Note: If data is not cleared any CV (corrected
Volume) measurements will be void as they will
encompass all temperature and pressure values
since data was last cleared. If using CV
measurements ensure data is downloaded and then
cleared each time the filter is replaced.
4. Switch the sampler on and if necessary adjust the flow-rate. The flow
rate through a sampler fitted with a SSI inlet hood must be maintained
at 67.8 m
3
/h (1.13m
3
/min) ± 10% at existing temperature and pressure
conditions throughout the sampling period to achieve the specified
particle size cut-point. A flow-rate of 70 standard m
3
/hr is suitable for
TSP sampling. In any case, do not operate the sampler outside the
range of 45 to 96 m
3
/hr, or its ability to compensate flow-rate will
diminish. Run the sampler for 5 minutes using Manual mode, to allow
the control circuitry to stabilise, then record the flow-rate indicated on
the digital display. The flow-rate should be stable.
5. Turn Manual mode off, then set the timer to operate on the desired day
and for the period required. The POWER switch should be left on. If