1� Introduction - Honeywell Impact Series Operating Instructions And Maintenance Manual

1� Introduction
The Impact Series is a compact, portable gas monitor designed to be carried or worn
without hindering the user. Its purpose is to monitor the atmosphere continuously
for hazardous levels of up to four gases. Audible and visual alarms alert the user to
danger when hazardous conditions are detected.
The instrument is usually supplied with four gas sensors, for detecting oxygen
(enrichment and deficiency), flammable gases (up to the Lower Explosive Limit) and
two toxic gases (for personal safety) all housed in an easily replaceable cartridge.
An alternative arrangement using infrared sensors for flammable or carbon dioxide
is also available.
Various sensor technologies are used to achieve this. In the vast majority of cases,
electrochemical technology is used to detect oxygen and toxic gases while catalytic
combustion technology is used to detect flammable gases. Infrared technology is
used to detect flammable and carbon dioxide gases.
Two types of cartridge are available. One is disposable where the cartridge has
a fixed life and once this has expired the cartridge is disposed of. The other is a
Serviceable Cartridge where the sensors can be individually replaced when required.
The serviceable cartridge type can only be used in the Impact Pro.
Note
Throughout this manual it is assumed that the Impact Series is equipped
with a Disposable Four Sensor Gas Cartridge. References to sensors not
fitted in the users instrument should be ignored.
This manual covers all models - some features are not available on all
models. Not all models are available in every country.
The instrument is supplied with dry cell batteries and holders as standard.
Rechargeable batteries and charger can be purchased separately as a kit.
Impact / Impact Pro / Impact Pro IR Operating Instructions
13