Ecom EN2 Operating Instructions Manual page 48

Usage property
The „Usage property" acc. to DVGW – TRGI Process form G 624
by conduits is memorized as a measurement routine by the ecom-
EN2. The calculation of the leak rate happens automatically accord-
ing to the following equation and corresponds herewith to the proce-
dure of the DVGW-TRGI Process Form G 624:
VB = V/TM * ((PA + P1)/(PA + P2)-1) * PB/P1 * f
with: VB = Gas leak volume in operation state (l/h)
V = Pipe content in litres
TM = Measurement duration in hours
PA = Barometer stand in hPa
P1 = Test pressure at meas. beginning in hPa
P2 = Test pressure at measurement end in hPa
PB = Maximal gas operation pressure in hPa
f = Factor for consideration of gas type
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 proper-
ty". Activate with <Enter>.
4. Type in the air pressure (PA) with the instrument keyboard and
confirm with <Enter>.
5. Choose the gas type (f) with cursor keys <Up/Down> and confirm
with <Enter>. The following gas types are recorded with their re-
spective factors:
Natural Gas, Air, Town Gas, Propane, Butane, Hydrogen
6. Type in the maximal operation pressure (PB) with the instrument
keyboard and confirm with <Enter>.
Page 48 ecom-EN2