Usage Property - Ecom EN3 Operating Instructions Manual

6.5.4 Usage property

The „Usage property" acc. to DVGW – TRGI Process form G 624 by conduits is memorised as
a measurement routine by the ecom-EN3.
The calculation of the leak rate happens automatically ac-cording to the following equation
and corresponds herewith to the procedure of the DVGW-TRGI Process Form G 624:
Parameter
VB
V
TM
PA
P1
P2
PB
f
Proceed as follows:
1. Close the conduit with a suitable adapter (test stopple, high-pressure
stopple or one-pipe counter cap).
2. Connect the components as described before.
3. Scroll with cursor keys <Up/Down> to the menu „Usage property". Activate with
<Enter>.
4. Choose the gas type (f) with cursor keys <Up/Down> and confirm with <Enter>.
The following gas types are recorded with their respective factors:
Gas
Natural Gas
Air
Town Gas
Propane
Butane
Hydrogen
5. Type in the maximal operation pressure (PB) with the instrument keyboard
and confirm with <Enter>.
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VB = V/TM * ((PA + P1)/(PA + P2)-1) * PB/P1 * f
Meaning
Gas leak volume in operation state (l/h)
Pipe content in litres
Measurement duration in hours
Barometer stand in hPa
Test pressure at meas. beginning in hPa
Test pressure at measurement end in hPa
Maximal gas operation pressure in hPa
Factor for consideration of gas type
ecom-EN3