E Instruments E500 - Preliminary Operations; Inserting the Probe Inside the Stack

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8.1.2 Preliminary Operations
Following are reported the parameters to set before performing the combustion analysis:
8.1.3 Inserting the probe inside the stack
When the autozero is over, insert in the stack the gas sample probe, previously connected to the instrument.
In order for the probe to be inserted at the right point within the stack, its distance from the boiler has to be twice
the diameter of the stack pipe itself or, if this is not possible, must comply with the boiler manufacturer’s instructions.
In order to position the probe correctly drill a 13/16 mm hole in the manifold (unless already present), and screwing
in the positioning cone provided with the probe - in this way no air is drawn from the outside during sampling.
The screw on the cone allows the probe to be stopped at the right measuring depth - this usually corresponds to
the center of the flue pipe. For greater positioning accuracy, the user may insert the probe gradually into the pipe
until the highest temperature is read.
The exhaust pipe must be inspected before carrying out the test, so as to ensure that no constrictions or losses
are present in the piping or stack.
BEFORE PERFORMING THE COMBUSTION ANALYSIS, SET THE NECESSARY
PARAMETERS (SEE CHAPTER 9.4.1
).
OK
OK
>
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ANALYSIS [1/3]
O2 4.2 %
CO 23 ppm
CO2 2.9 %
Eff ---%
Loss ---%
Tf ---%
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