The purpose of the Series 1000 zero air units is to provide pollutant-free air from “shop air” in order to allow users of ambient air monitors to “zero” those units. The 1000 configuration selection depends upon the monitors that are to
be calibrated.

Water vapour is removed by compressor whit a holding tank and a coalescing filter. The 1000 series does not use a drying system to provide super-dry air (dew point less than –30ºC since water vapour is not generally considered a
pollutant. A dew point of 3ºC obtained through the use of a compressor should suffice.

The Series 1000 can either be transported for utilization at several sites, or left at one remote site virtually unattended except for periodic maintenance requirements.

CONFIGURATIONS
· Model 1000-A
This is the most basic configuration of the zero air unit. It is able to remove O3, SO2, H2S, non-Methane Hydrocarbons, NO, and NO2. It accomplished this by use of air flow provided by an external compressor which enters the scrubbing unit and passes through a tube for the removal of O3, SO2, H2S,
non-Methane Hydrocarbons by means of activated charcoal.The flow then enters another tube which removes NO by means of chemisorbant granules which change colour from violet to brown as they are used up.

· Model 1000-B
Added to the basic unit (Model 100-A), is an internal reactor chamber that removes Carbon Monoxide in addition to the gases mentioned before. The reactor is situated downstream of the charcoal and chemisorbant tubes and converts CO and CO2 by use of a palladium catalyst heated between 80-85ºC.

· Model 1000-C
Added to the Model 1000-B, is an internal reacor chamber that removes Methane Hydrocarbons in addition to the gases mentioned before. The HC
reactor assembly is located down-stream of the CO reactor and converts Methane Hydrocarbons to water vapour and CO2.

OPTIONS
· Rack Mounting
The unit can be purchased with rack mounting slides and/or rack mounting brackets (ears) for installation in standard cabinets.

DIMENSIONS
   Bench Mount                       Rack Mount
   17.8 cm (7”)                      17.8 cm (7”)
  43.5 cm (17”)                      48 cm (19”)
   59 cm (23”)                       59 cm (23”)

SPECIFICATIONS
Removal of Impurities (Chemical Conversion, all Models):

NO:                    < 1 ppb
NO2:                  < 1 ppb
SO2:                  < 1 ppb
O3:                    < 1 ppb

Non-Methane:      < 1 ppb

Removal of Impurities (Heated Reactor):

CO (Mod: 1000B/C):             < 0.1 ppm

Methane (Mod: 1000-C):       < 0.1 ppm

Dew Point:                           3º C