Crowcon Tetra MO7237, User Manual, Page: 11 / 36

unit, allowing you to swap sensors between units or configure your unit, as
appropriate, to your current needs. Plug and play will ease maintenance time
and cost, and the intelligent modular system will remove the need to calibrate
each sensor. Additional i-modules can be purchased pre-calibrated from your
local supplier.
Reliable, anti-shock mechanics and robust housing
The Tetra housing is built from resilient material, giving it strength and flexibility
to withstand the hardest of working conditions, water and dust tight to IP65,
and with a non-slip grip. The internal structure has been carefully designed to
make servicing easy and at the same time very rugged. If the unit is dropped,
there will be no disruption of power or function, ensuring reliability and service
for years to come.
Software
The internal software in Tetra has been designed and written in accordance
with the requirement of IEC 61508 to ensure quality and integrity of operation.
Tetra has been designed to give a truly reliable personal gas monitoring system.
The internal circuitry includes an external watchdog, the software monitors for
any malfunction within the unit and will display an error warning to the user
should they occur.
Tetra Introduction