Teledyne TurbO2 - Portable trace oxygen analyzer - Manual (Page 11)

7
Portable Trace Oxygen Analyzer TURBO
2
Teledyne Analytical Instruments
Operation
WARNING: The TURBO
2
is NOT intrinsically safe and must not be used in or
brought into hazardous areas.
The TURBO
2
is supplied completely assembled and ready for instant
use. The Micro-fuel Cell is in place within the manifold, and prior to ship-
ment the manifold was purged with an inert gas to eliminate all but traces of
oxygen from the internal sampling system. The integral shut-off valves in the
quick disconnect sample fittings, if not disturbed, will maintain this inert
atmosphere within the manifold indefinitely. This can be demonstrated by
placing the Range Selector Switch in the 0-1000 PPM position.
When the range selector is moved from the OFF position, power to the
instrument circuitry is established. The meter will instantly respond to the
residual oxygen within the integral sample passages.
It is impossible to achieve a perfect seal of the internal sample system,
and what the meter is indicating is the diffusion/consumption balance point
of the internal sample system and the Micro-fuel cell.
This balance point, with a properly calibrated instrument, is always
within the limits of the 0-100 range. If the reading climbs off the limits of this
scale, a leak in the manifold assembly is indicated.
To extend cell life and minimize the time required to make the next
analysis, the instrument should always be purged with sample or an
inert gas prior to being taken out of service for standby or storage.