Thermo Scientific Mercury Freedom 80i, Руководство пользователя

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Optional Equipment
Zero Air Supply
Thermo Fisher Scientific Mercury System Manual 6-7
The Zero Air Supply has been designed to provide oil-free and particulate-
free, dry air from plant air. Zero Air Supply components include an oil
mist coalessor, water coalessor with auto drain, particulate filter,
accumulator tank, heatless air dryer, and regulator (
Figure 1–10
).
The Thermo Scientific MaxSense
®
Nitrogen Air Handling System
(Nitrogen Generator) converts air to nitrogen (N
2
). Nitrogen is used as a
carrier for Hg calibration gas (from the 81 i ), and is also used as a dilution
gas for sample measurements originating in the 83 i or 83 i GC.
The Nitrogen Generator utilizes prime components of the Thermo
Scientific Zero Air Supply to condition the air prior to N
2
generation, and
Thermo Fisher Scientific offers a retrofit kit to enhance an existing zero air
supply with nitrogen.
By using a three-way valve, the Nitrogen Generator can also be operated in
Bypass mode, which diverts airflow around the N
2
generator to provide
instrument-grade air to the Mercury System. This may be beneficial for
testing applications, and when routine maintenance on N
2
components is
required. If this feature is not within the scope of the application, simply
vent to atmosphere.
Refer to
Table 6–1
for a description of the Nitrogen Generator
specifications. Also refer to the product data sheet that follows.
Table 6–1. Nitrogen Generator Specifications
Parameter Specification Comments
Min/Max Operating Pressure 70 psig/175 psig
Nitrogen Output Purity 99% @ 100 psig Less at lower output pressure
Nitrogen Flow Rate 60 SCFH @ 100 psig
Dew Point Temperature <-50
o
C
Min/Max Air Inlet Temperature 4 - 60 o C
Recommended Inlet Air
Temperature 25
o
C
Recommended Ambient
Temperature 25
o
C
Storage Temperature Range 0 – 30
o
C
Ambient Environmental
Conditions Indoor use Standard atmospheric conditions
Zero Air Supply
Nitrogen Generator
Specifications