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06712B (DCN5875)
9
1 INTRODUCTION
1.1 Preface
Teledyne API is pleased that you have purchased the Model 701H Zero Air System.
The M701H is an excellent source of clean, dry air for dilution calibrators. It also may be
used as a source of purge air for permeation tube ovens or burner air for FID analyzers.
The regenerative, heatless dryer removes water and produces gas with a dew point of
less than -40°C (up to 30 SLPM flow rate) independent of the inlet dew point and assists
in the removal of other gases, greatly increasing the life of the chemical scrubbers.
The M701H includes an oil-free and diaphragm-free pump plus scrubbers to remove
SO
2
, NO, NO
2
, O
3
, H
2
S, CO, and Hydrocarbons.
Inlet air is pulled into the pump and routed through a pre-cooler and water trap to
remove moisture. The air then passes through the Regenerative Dryer for final drying
and then to the storage tank.
Tank pressure is monitored and maintained at a preset level by cycling the pump
automatically as needed, thereby extending both the pump and scrubber life. Outlet air
then passes through a filter to assure a clean, dry, analytical zero air supply.
A microcontroller cycles the regenerative dryer and water trap valves to prevent the
pump from starting against full head pressure. The M701H is an ideal accessory to the
Model 700E Mass Flow Calibrator or Model 702 Single Point Calibrator as a zero air
source for analyzers.
M701H Features:
Standard two year warranty
Regenerative, heatless dryer for maintenance-free water removal
independent of inlet dewpoint
Long life scrubbers for SO
2
, NO, NO
2
, O
3
, H
2
S, CO, and Hydrocarbon.
Automatic water drain
Automatic pump control based on flow demand
May be used to provide combustion air for FID
Source of purge air for permeation tube ovens
Zero air for Ozone Generators