Ecom B Operating Instructions Manual page 31

Usage property
The "Usage property" acc. to DVGW – TRGI Process form G 624
at conduits is memorised as a measurement routine by the ecom-B.
The calculation of the leak rate happens automatically according to
the following equation and corresponds herewith to the procedure of
the DVGW-TRGI Process Form G 624:
VB = V/TM * ((PA + P1)/(PA + P2)-1) * PB/P1 * f
with:
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 proper-
ty". Activate with <Enter>.
4. Adjust the air pressure (PA) with cursor keys <Up/Down> 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. Adjust the maximal operation pressure (PB) with cursor keys
<Up/Down> and confirm with <Enter>.
ecom-B
= 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
Page 31