Elster EK220, Operating Instructions And Installation Information

Page: 28 / 120

Volume Conversion Device EK220
28 © Elster GmbH
b) Two pressure sensors
1
connected to the EK220, Sel.p2 = 1 ("CT30") :
AD Designation / value Unit Access Address DC
p Pressure bar - 7:310_1 4
pMin Lower alarm limit pressure bar C 7:3A8_1 8
pMax Upper alarm limit pressure bar C 7:3A0_1 8
MRL.p Pressure meas. range lower limit bar C 6:224_1 8
MRU.p Pressure meas. range upper limit bar C 6:225_1 8
p.F Pressure substitute value bar S 7:311_1 8
pb Pressure at base conditions bar C 7:312_1 8
Md.p Pressure mode - C 7:317 7
Typ.p Pressure sensor type - C 6:223 8
SNp Serial no. of pressure sensor - C 6:222 8
SMenu p coeff. Submenu pressure coefficients - (C) 12:1C1 8
pAdj1 Adjustment value 1 for pressure bar C / S 6:260_1 8
pAdj2 Adjustment value 2 for pressure bar C / S 6:261_1 8
Prog Accept pressure adjustment - C / S 6:259 2
p.atm Ambient pressure fixed value bar C 6:212_1 8
p.Mes Pressure measurement bar - 6:211_1 4
p.Abs Absolute pressure measurement bar - 6:210_1 4
SMenu Press. 2 Submenu pressure sensor 2 - (C) 13:1C1 8
p2Mes Pressure 2 measurement bar - 7:211_1 4
(Legends: see page 22)
The unit of the various pressure displays can vary depending on the device setting. The
setting of the unit takes place via the WinPADS parameterisation software with the aid of
parameter files. To do this the appropriate lock must be open. Possible units are: bar,
kPa, psi and MPa.
Furthermore, representation as overpressure or absolute pressure is possible. Exceptions
here are the adjustment values for the pressure (pAdj1, pAdj2, p2Ad1 and p2Ad2) and the
atmospheric pressure (p.atm) which are always displayed as absolute pre ssure.
p Pressure
pMin Lower alarm limit pressure
pMax Upper alarm limit pressure
p is the pressure which is used for computing the conversion factor (
®
3.6) and
hence the volume at base conditions (
®
3.2).
If the measured pressure p.Abs (see below) is within the alarm limits pMin and
pMax , it is used as p : p = p.Abs. .
If p.Abs is located outside the alarm limits, the substitute value p.F (see below) is
used: p = p.F. In addition, disturbance quantities are then counted (
®
3.2, 3.3) and
the message "p Alarm Lim." displayed (
®
page 48).
1
It is only possible to connect two pressure sensors of type CT30!