Usability Check - Ecom -DP Operating Instructions Manual

4.5. Usability Check

The usability check acc. to DVGW – TRGI Process form G 624 by conduits is
memorised as a measurement routine by the ecom-DP. The calculation of the
leak rate happens automatically according to the following equation and corre-
sponds 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 = 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 (part of
ecom-DPK).
2. Connect the components a described in ecom-DPK
manual.
3. Scroll with <UP/DOWN> until the menu „Suitabil-
ity/Leak rate". Activate with <OK>.
4. The pipe volume to be checked (V) is needed for the
calculation of the leak rate. The ecom-DP offers two
input possibilities:
a. Direct input of pipe volume after having pressed
<F1> (ADD) (by repeated input the value will be
added).
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