Teledyne 326, 327 and 328 - Oxygen analyzers - Manual (Page 17)

2-3
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 Cell 2.3 Cell 2.3 Cell 2.3 Cell 2.3 Cell T T T T Types ypes ypes ypes ypes
TBE selects the class of cell used in the analyzer to give the best pos-
sible performance for the customer’s sample conditions. Several typical
cells, their 90% response times, output in air, and typical uses are outlined
below:
2.3.1 Class A-3 Cell 2.3.1 Class A-3 Cell 2.3.1 Class A-3 Cell 2.3.1 Class A-3 Cell 2.3.1 Class A-3 Cell
The Class A-3 cell must be used for any application where the carbon
dioxide content of the sample gas is in the region of from 2 to 100% and the
sample is monitored continuously.
The A-3 cell output is 0.20 mA, and response is 45 seconds.
2.3.2 Class A-5 Cell 2.3.2 Class A-5 Cell 2.3.2 Class A-5 Cell 2.3.2 Class A-5 Cell 2.3.2 Class A-5 Cell
Class A-5 cells are used in applications where the carbon dioxide con-
tent of the sample gas is continuously within the range of 1-100%, and the
sample is monitored intermittently.
The A-5 cell output is 0.19 mA, and response is 45 seconds.
2.3.3 Class B-1 Cell 2.3.3 Class B-1 Cell 2.3.3 Class B-1 Cell 2.3.3 Class B-1 Cell 2.3.3 Class B-1 Cell
Class B-1 cells are employed in CO
2
-free (between 0-0.1%) applications
where fast response is important.
The B-1 cell output is 0.50 mA, and response is 7 seconds.
2.3.4 Class B-3 Cell 2.3.4 Class B-3 Cell 2.3.4 Class B-3 Cell 2.3.4 Class B-3 Cell 2.3.4 Class B-3 Cell
The B-3 cell is used in applications where a slightly longer response
time is acceptable in order to gain a longer cell life.
The B-3 cell output is 0.30 mA, and the response is 13 seconds.
2.3.5 Class C-3 Cell 2.3.5 Class C-3 Cell 2.3.5 Class C-3 Cell 2.3.5 Class C-3 Cell 2.3.5 Class C-3 Cell
The Class C-3 cell is employed in CO
2
-free (between 0-0.1%) applica-
tions where a slower response time can be tolerated in the interest of long
cell life.
The C-3 cell output is 0.20 mA, and response is 30 seconds.
2.3.6 Warranty Conditions 2.3.6 Warranty Conditions 2.3.6 Warranty Conditions 2.3.6 Warranty Conditions 2.3.6 Warranty Conditions
Customers having warranty claims must return the cell in question to the
factory for evaluation. If it is determined that failure is due to faulty material
or workmanship the cell will be replaced free of charge. See Specifications
in the addendum to this manual.