Specifications

PCA
1.3 PCA Model Configurations
Introduction
TABLE 1-1. PCA SENSOR CONFIGURATIONS
PCA Models
Standard Advanced
Sensors Installed
PCA Part No. PCA Part No. Stack Temp., CO NX Draft
Model 24- Model 24- Air Temp. & O
2 (

P)
10 8040 40 8140 X
15 8041 45 8141 X X
20 8042 50 8142 X X
25 8043 55 8143 X X X
30 8044 60 8144 X X X
35 8045 65 8145 X X X X
PCA 10 & 40
These basic instruments have the capability of measuring, displaying,
and storing combustion tests. They will also display flue gas Oxygen
content, flue gas Carbon Dioxide (CO
2 ) content, air temperature, flue gas
temperature, combustion efficiency, excess air , and the current fuel
selected. The ‘standard’ PCA 10 stores up to 10 combustion tests, while
the ‘advanced’ PCA 40 can store up to 100 tests.
PCA 15 & 45 with Draft
In addition to the features of the basic PCAs described above, these instru-
ments have the added capability of measuring, displaying, and saving draft
or differential pressure in either Millibars, Pascals, or Inches-of-Water
Column.
PCA 20 & 50 with Carbon Monoxide Measurement
In addition to the features of the basic PCAs described above, these
instruments have the added capability of measuring, displaying, and
saving Carbon Monoxide (CO) content, as well as calculating a CO level
that is referenced to Oxygen. The ‘standard’ PCA 20 calculates CO refer-
enced to 0% Oxygen, while the ‘advanced’ PCA 50 calculates CO refer-
enced to a user selected Oxygen level of between 0–15%.
PCA 25 & 55 with Draft and CO Measurement
These instruments combine the features of all the PCAs listed above.
Instruction 0024-9219 1-3