Volume Conversion Device EK220
26
©
Elster GmbH
3.3 Actual volume (volume at measurement conditions) list
AD
Designation / value
Unit
Access Address DC
Vm
Actual volume
m3
C / S
4:300 12
Qm
Actual flow rate
m3/h
-
4:310
4
VmD
Vm disturbed
m3
S
4:301 12
VmT
Vm total
m3
-
4:302 15
VmA
Vm adjustable
m3
S
4:303 12
VmME
Month-end value
m3
-
14:161 16
Time
Time of VmME
-
-
14:165 16
(Legends: see page 22)
Vm
Actual volume
The volume
V1
(
®
3.8) measured on the input is summed here provided no alarm
is present.
An alarm is present when a message "1" or "2" is located in any momentary status
(
®
3.8 ).
"Alarm" means any message with the number "1" or "2" (
®
3.8).
Qm
Actual flow rate
Momentary actual flow (actual flow rate).
If the EK220 receives fewer than four pulses per hour on the counter input (termi-
nal "DE1"), the flow rate is set to "0".
The maximum inaccuracy of the indicated value corresponds to four pulses.
Example: The cp value of the pulse transmitter (
®
(Legends: see page 22)
cp.I1, page 60) is 0.1 pulses/m3 and the momentary flow rate is 3600 m3/h.
Þ
Pulse frequency
= 3600 m3/h
·
0.1 pulses/m3 = 360 pulses/h
Þ
max. inaccuracy
= 4 pulses/h / 360 pulses/h =
1.11 %
VmD Vm disturbed
Here the actual volume is summed while ever an alarm is present, i.e. a message
with the number "1" or "2" is located in any momentary status (
®
3.8).
VmT Vm total
Here the sum of
Vm + VmD
is always displayed. Entries for
Vm
or
VmD
therefore
also have an effect here. No entry for
VmT
itself can be carried out.
VmA Vm adjustable
Here, as with
VmT
, the total quantity, i.e. disturbed and undisturbed volumes are
counted. In contrast to
VmT
,
VmA
can however be changed manually.
This counter is typically set to the same reading as the gas meter in order to be
able to easily detect deviations by comparison of the two counter readings.
VmME Vm month-end value
VmME
saves the current month-end value at the change of month at the day
boundary.
Time Time of VmME
Date and time of the saved
VmME
.
Содержание EK220
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