Chapter 7 Operation
Operating manual HE 5422 MR
29
Version 1.2
7.4
Measuring hose cleaning
Fig. 7.4: Connection for measuring hose cleaning
The measuring hose cleaning system is used to keep the measuring hoses free of dust deposits.
For this purpose, the differential pressure measurement is regularly blocked off and compressed air
is blown into the connection lines for raw and pure gas. After a recovery time for pressure balanc-
ing, the differential pressure measurement is activated again. The process is repeated after a time
interval or a number of Δp-Cycles.
Fig. 7.5: Temporal progression of the measuring hose cleaning
P +
Raw gas
P -
Pure gas
Blowing air
Isolation valves
Blowing air
Blowing
time
Recovery
time
Interval
