18. Perform a measurement with a Pitot tube
The used Pitot tube must be a Pitot tube type L with K thermocouple connection.
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 (+) catched by the nose, is connected to the
P+
at the bottom of the analyser.
The static pressure (-) catched by the holes of the head, is connected to the
P-
at the bottom of the analyser.
The connection cable of the thermocouple K probe is connected to the T1 thermocouple K inlet of the top of the analyser.
If the K thermocouple is not connected, no value will be displayed.
When the connections are made :
➢
Turn on the analyser.
➢
Go to
“Measurement”
menu then press OK.
➢
Go to
“Pressure”
menu then press OK.
➢
Go to
“Draught Press.”
then press OK.
The analyser displays the measured values.
18.1. Link the measurement to a customer
When the measurement has been performed, it is possible to link it to a customer registered in the analyser or to a customer unregistered in the
analyser that must be created.
➢
Press the function key to
save.
The analyser displays the list of registered customers.
➢
Select a customer with the rotative button then press
OK
or create a new customer (see page 20) then select it.
The analyser displays the
list of available boilers.
➢
Select the boiler with the rotative button then press
OK
or create a boiler (see page 21) then select it.
The analyser backs to the measurement screen.
18.2. Print the measurement on the ticket
When the measurement is stable, it is possible to print it on the ticket : Press the function key
to print it.
Perform a measurement with a Pitot tube
33
Schema
Total pressure (Pt)
Static pressure (Ps)
Dynamic pressure = Pt-Ps
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