Bacharach Fyrite Classic Manual De Propietario

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Instruction 0011-9026 
Page 17
 
 
 
 
 
 
 
Figure 17.  Checking CO
2
 of gas 
       designed 
furnace 
(sampling 
tube
       inserted 
through 
draft 
diverter; 
 
 
 
 
 
 
 
fl ue gas temperature test can 
       be 
made 
at 
same 
point).
5.7   General FYRITE Applications
It is only possible to specify a few general rules for such applications. Where possible, 
sample should be obtained at a point where the gases are well mixed to a uniform 
composition. Where this is impossible; it will be necessary to average a number of 
measurements taken at different locations to obtain representative average. Where 
gases being sampled are not saturated with moisture (many non-combustion applica-
tions), it is very important to maintain the wool packing of Filter Saturator Tube in a 
moist condition.
NOTE: The FYRITE is calibrated to analyze gases which are 
normally saturated with moisture. Failure to moisten wool 
packing in fi lter saturator tube with water will cause FYRITE 
to indicate slightly lower than actual gas concentration.
Where special length sampling lines are required, add one more bulb squeeze to the 
18 required with standard Sampling Assembly for each additional 3 cubic inches 
(50cc) volume of special sampling line.
EXAMPLE:  For each 9 ft. of 3/1 6 inch (I.D.) additional 
length of sampling line, add one more bulb squeeze.
If it is necessary to trap a sample over water for later analysis, a minimum of 900 cc of 
sample will be required. If sample is trapped over water, it is good practice to use 10 
to 15% NaCl (table salt) in the water to minimize absorption of CO
2
 or O
2
 by water.
Trapping a sample over mercury will eliminate any possible error due to absorption of 
CO
2
 or O
2
.
5.8   Altitude Correction Table