Thermo Scientific 5028i, Instruction Manual

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Introduction
Principle of Operation
1-4 Model 5028
i
Instruction Manual Thermo Fisher Scientific
Simultaneous refined mass measurements of sampled particulate on
the filter tape and sample volume measurement provide a continuous
concentration measurement of ambient particulate concentration.
Figure 1–1 provides a schematic of the components used within the
Model 5028 i . Within the two measurement chambers the four key
components are 1) the proportional detector, 2) particle collection onto
a glass fiber filter tape, 3) a vertical moving vacuum chamber plate, and
4) the C-14 beta source <100 µCi (<3.7 Mbq). Based on this schematic,
a description of operation is provided.
VACUUM
PUMP
Ta
RHa
Pa
DETECTOR 1
FILTER TAPE 1
TS
VAC
β-SOURCE 1
P
PROPORTIONAL
VALVE 1
TF
HEATER 1
INLET 1
3-WAY V1
1 2
HEATER 2
INLET 2
DETECTOR 2
FILTER TAPE 2
TS
β-SOURCE 2
TF
PROPORTIONAL
VALVE 2
VAC
P
3-WAY V2
1 2
PM2.5 VSCC
Figure 1–1. Model 5028
i
Flow Schematic