Teledyne 701 Manuel D’Utilisation

OPERATION 

Teledyne API Model 701 Zero Air Generator 

5-10 

01671H (DCN6051) 

 

The CO scrubber catalytically oxidizes CO to CO

2

. The catalyst is proprietary and 

operates at room temperature; however, it is heated to approximately 70

C to prevent 

water condensation. It theoretically should never need changing. However, it may 
become contaminated or poisoned over time so we recommend that it be replaced once 
per year or sooner if the level of CO in the air is high. 

The NO scrubber uses Purafil® to oxidize NO to NO

2

. Purafil® has a finite life and we 

recommend that it be replaced annually or sooner if the level of NO in the air is high. 

Activated charcoal removes NO

2

, O

3

, SO

2

 and H

2

S. The charcoal should be replaced 

annually or sooner if there are high atmospheric levels of these contaminants, or if the 
calibrator zero air shows signs of a positive drift. 

The final filter, inside the rear panel retains any particulates released by the M701. The 
filter rating is 10 microns. If the filter should become restricted, it should be 
disassembled and cleaned, or the element replaced. 

Dangerous voltages exist on the controller board even when the 
power switch is turned off. 

 

All functions of the M701 are managed by the M701 Control PCA. The M701 Control 
PCA provides connections for all switched and non-switched AC components, AC input, 
and the front panel power switch/circuit breaker. Non-switched components include the 
CO or HC scrubber, fan and front panel power indicator. Switched components include 
the Regenerative Dryer valve, water drain valve, and the pump. All connections are 
made by quick release electrical connectors to aid in servicing. See schematics in 
Appendix B.