BAM 1020-9800 Manual Rev W.docx
Page 9
1. The shelter temperature must stay between 0 and 50 °C inside at all times or alarms
and failures may result. Remember that the vacuum pump and inlet heater can
contribute significantly to shelter heating.
2. The exact shelter temperature within the 0-50 °C range is not critical
.
However
temperature changes during the measurement cycle can lead to measurement
artifacts. These artifacts, when present tend to present only during hourly
measurements and are generally insignificant when daily averages are calculated.
3. Met One Instruments recommends logging the temperature inside non-air conditioned
mini enclosures such as the model BX-902. Met One Instruments offers a BX-592-1
room temperature sensor which can be logged directly by the BAM 1020 for this
purpose
4. BAM 1020 users in hot climates where the ambient temperature exceeds 40 °C should
consider using the model BX-903 air conditioned mini shelter or an air conditioned
walk-in shelter to avoid over-heating the BAM 1020.
5. The portion of the inlet tube inside of the shelter or building should always be
adequately insulated. This is especially important when the equipment is operated
under conditions of high ambient dew point. Otherwise condensation could occur
inside the sampling tube and/or measurement artifacts could result. If this proves to be
an issue, the user may consider increasing the temperature inside the shelter to a
point closer to ambient temperature. The BAM 1020 should not be placed directly in
the path on an air conditioning vent.
2.3 Site Selection and Inlet Positioning Criteria
We recommend that you check for local regulations and guidance documentation that may
exist before selecting the site in which to install the BAM 1020. For example, US-EPA
provides a variety guidance documents where site selection issues are addressed. Such
guidance and regulation may provide information concerning:
1. Inlet height
2. Spacing and clearance
3. Proximity to particulate sources, both mobile and stationary
4. Additional siting criteria or considerations
These details should be understood before selecting a site.
2.4 Mounting Options in a Walk-In Shelter
When the BAM 1020 is to be located in a walk-in shelter, it may be installed in either an
equipment rack or on a bench top. Take the following into account when planning the
mounting:
•
Rear Access:
It is important that you leave plenty of access to the rear of the BAM
1020 for wiring connections and maintenance. At least five inches is required. Full
access to the back is recommended whenever possible. There must be adequate
access to the power switch located on the back of the instrument.
•
Top Access:
It is necessary to have a minimum of eight inches clearance between
the top of the BAM 1020 inlet receiver and the bottom of the shelter ceiling to
accommodate the smart inlet heater.
