Teledyne 326, 327 and 328 - Oxygen analyzers - Manual (Page 19)

2-5
Operational Theory Operational Theory Operational Theory Operational Theory Operational Theory Model 326/327/328 Model 326/327/328 Model 326/327/328 Model 326/327/328 Model 326/327/328
Teledyne Analytical Instru-
ments
2.3.7 CO 2.3.7 CO 2.3.7 CO 2.3.7 CO 2.3.7 CO
2 2 2 2 2
Effect on C-3 and B-1 Cells Effect on C-3 and B-1 Cells Effect on C-3 and B-1 Cells Effect on C-3 and B-1 Cells Effect on C-3 and B-1 Cells
A graph showing the effects of different concentrations of CO
2
on the
C-3 and B-1 cells is displayed on the preceding page.
2.4 Intrinsic Safety Barriers 2.4 Intrinsic Safety Barriers 2.4 Intrinsic Safety Barriers 2.4 Intrinsic Safety Barriers 2.4 Intrinsic Safety Barriers
Intrinsic safety barriers are used to limit the electrical energy within the
controlled circuit to a level too low to cause ignition of a flammable mate-
rial. The intrinsically safe cell block used in the CENELEC-approved units
houses the Micro-Fuel Cell and the temperature compensation thermistor.
The following information has been included in this manual to describe
the operation and maintenance considerations involved with the use of
intrinsic safety barriers. Excerpts from the manufacturer’s literature are
enclosed to assist in use and replacement of the barriers.
The information provided here is in no way intended to serve as advice
of a safety-related nature; its only purpose is to document the components
used.
Any and all hazardous conditions to which the analyzer may be exposed
are characteristic of the user’s environment, and understanding of the
conditions and precautions necessary to safe operation are the user’s re-
sponsibility.
Bypassing the barriers in any way renders them ineffective.
WARNING: If the instrument is used in any manner inconsistent with
the intent of the intrinsic safety design, the user assumes
all risks.