2-6
2 Operational Theory Model 3000PA
Teledyne Analytical Instruments
Nominal output in air is 0.19 mA, and 90 % response time is 45 s.
Expected life in flue gas is 8 months.
2.2.6.3 Class B-1 Cell
The class B-1 cell is for use in applications where it is exposed to less
than 0.1 % of carbon dioxide, and where fast response is important.
Nominal output in air is 0.50 mA, and 90 % response time is 7 s.
Expected life in air is 8 months.
2.2.6.4 Class B-3 Cell
The class B-3 cell is for use in applications where a slightly longer
response time is acceptable in order to have a longer cell life.
Nominal output in air is 0.30 mA, and 90 % response time is 13 s.
Expected life in air is 12 months.
2.2.6.5 Class C-3 Cell
The class B-1 cell is for use in applications where it is exposed to less
than 0.1 % of carbon dioxide, and where a longer response time is accept-
able in order to have a longer cell life.
Nominal output in air is 0.20 mA, and 90 % response time is 30 s.
Expected life in air is 18 months.
2.2.6.6 Hydrogen and/or Helium Service
If the sample gas contains 10 % or more hydrogen and/or helium,
“clamp” cells are used. These Micro-Fuel cells are identified by the suffix -C
added to the cell class number.
2.3 Sample System
The sample system delivers gases to the Micro-Fuel Cell sensor from
the analyzer rear panel inlet. Depending on the mode of operation either
sample or calibration gas is delivered.
The Model 3000P sample system is designed and fabricated to ensure
that the oxygen concentration of the gas is not altered as it travels through the
sample system. The sample encounters almost no dead space. This mini-