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Measurement Challenges• Environmental conditions can play a role inthe accuracy of beta attenuation measurements.The main factors are:– Enclosure internal air temperature stability.– Relative humidity and sample moisture.– Electromagnetic and radio interference sources.6/9/2009 30
Measurement Challenges• Enclosure Temperature Stability:– The BAM-1020 should be in a stable temperatureenvironment, to the extent possible.– The exact temperature is not critical as long as it isfairly stable during the hour.– Changes in air density between the source anddetector may be measured as mass noise.6/9/2009 31
Page 1 and 2: BAM-1020Beta Attenuation Mass Monit
Page 3 and 4: Overview - Topics of Discussion•
Page 5 and 6: What is the PM2.5 FEM Configuration
Page 7 and 8: What is the PM2.5 FEM configuration
Page 9 and 10: Data Example 1 - PM10 and PM2.5 Lev
Page 11 and 12: Data Example 3 - PM2.5 Slope / Offs
Page 13 and 14: Typical older unimproved unit compa
Page 15 and 16: What is the PM2.5 FEM configuration
Page 17 and 18: Theory of Operation• At the begin
Page 19 and 20: Mass Calculation• DEFINITIONS:- I
Page 21 and 22: Beta Gauge Safety• The BAM-1020 c
Page 23 and 24: BAM-1020 Tape Transport6/9/2009 23
Page 25 and 26: Simplicity - Measurement System•
Page 27 and 28: Critical Checks• Leak Check, Flow
Page 29: BAM-1020 Span Check• The BAM-1020
Page 33 and 34: Electromagnetic Interference• Sou
Page 35 and 36: Supplemental Materials• BAM-1020

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