30
Perform other measurements
Perform other measurements 31
If Preliminary test is selected:
• Select the fuel: natural gas or LPG.
• Read the gas pressure inside the pipe.
• Tap
“Start stabilization”
.
The analyzer starts the stabilization.
• Tap
“Start test”
once the stabilization is completed.
At the end of the test, the analyzer displays the following results:
• P1
• P2
• Pressure drop
• Pressure drop allowed
According to the results, the analyzer will display if the test is compliant or not compliant.
If Indirect test is selected:
• Select the fuel: natural gas or LPG.
• Select the test gas: fuel or air.
If the volume is kown
:
• Enter the known volume of the installation between 19 and 999 dm
3
.
• Connect the hose to the piping system.
• For test with gas, read the gas pressure inside the pipe.
• For test with air, pressure the pipe up to 22 hPa for natural gas pipeline or 30 hPa for LPG pipeline.
• Tap
"Start stabilization"
.
The analyzer starts the stabilization.
• Tap
“Start test”
once the stabilization is completed.
At the end of the test, the analyzer displays the following results:
• P1
• P2
• Pressure drop
• Leakage rate
• Maximum leak allowed
According to the results, the analyzer will display if the test is compliant or not compliant.
If the volume is unknown:
• Connect the hose to the piping system.
• For test with gas, read the gas pressure inside the pipe.
• For test with air, pressure the pipe up to 22 hPa for natural gas pipeline or 30 hPa for LPG pipeline.
• Tap
"Start stabilization"
.
The analyzer starts the stabilization.
• At the end of the stabilization, extract a volume from pipeline using the Syringe (20 or 100 ml).
• Select the volume extracted (20 or 100).
• Wait for the pressure stabilization (minimum 1 min) before tapping
"Refill done"
.
• The volume measurement is shown.
• Tap
"Start test"
.
At the end of the test, the analyzer displays the following results:
• P1
• P2
• Pressure drop
• Leakage rate
• Maximum leak allowed
According to the results, the analyzer will display if the test is compliant or not compliant.
12.3 Gas pump flow rate
This screen shows the real-time measured flow rate of the gas passing through the analyzer as performed by the main
flue gas sampling pump.
The pump of the analyzer must be turn on.
“Other measurements”
screen is displayed.
• Tap
“Gas/pump Flow Rate”
.
The analyzer displays the flow rate of the pump in L/m.
12.4 Heat exchanger integrity test
This test provides information to help determine if there might be a crack or leak in the heat exchanger and/or combustion
chamber.
The pump of the analyzer must be on to perform this test.
“Other measurements”
screen is displayed.
• Tap
“Heat Exchanger Integrity Test”
.
• Insert the sampling probe into the exhaust flue/pipe.
• Turn on the heating equipment (with the blower off) and let the O
2
& CO measurements stabilize on the analyzer
screen.
• Tap Start icon on the bottom of the screen to start the Heat Exchanger Integrity Test on the analyzer right before
the blower turns on. Make sure the blower turns on during the first 30 seconds of the test period.
The results of the test will calculate the amount the O
2
and CO measurements varied during the 60 second test period.
The greater the variances, the more likely there is to be a crack or abnormality with the heating system that should be
investigated by a heating professional.
12.5
Perform a Stack Gas Velocity measurement with a Pitot tube
To perform this test, it is necessary to have a Pitot tube Type L or Type S.
Place and connect the L Pitot tube:
The Pitot tube must be introduced perpendicularly, in the middle into the duct and parallel to the flow.
The head (ending with an ellipsoidal nose) must be maintained parallel and facing the flow.
The total pressure (+) caught by the nose, is connected to the P+ at the bottom of the analyzer.
The static pressure (-) caught by the holes of the head, is connected to the P- at the bottom of the analyzer.
Place and connect the S Pitot tube:
The S-type Pitot tube is inserted into the stack and rotated until the differential pressure measurement is greatest for a
given location in the stack. The proper orientation is for the high pressure side of the S-type Pitot tube tip to face into the
direction of the stack gas flow as shown in the diagram.
The holes must be perfectly aligned with the air or gas flow direction.
The Pitot tube S is more sensitive to alignment errors thas the Pitot tube L.
The connecting to the measurement device must be carried out like following:
• The leg in front of the air flow is connected to the P+ sign of the analyzer.
• The leg at the opposite of the air flow is connected to the P– sign of the analyzer
When the connections are made and
“Other measurements”
screen is displayed :
• Tap
“Stack Gas Velocity”
.
The analyzer displays the following measurements: Velocity, Volume flow and Mass Flow.
• Tap the K value to modify it if necessary (K value must be between 0.0000 and 99.0000).
Recommended values are: 0.84 for S-Type Pilot tube and 1.0015 for L-Type Pilot tube.
• For proper calculations of volumetric flow rate and mass flow rate, enter correct stack cross-sectional (see chapter
