Data Sheet for Product

3
Smart Infrastructure
CE2N5372en
2021-12-
07
M-bus communication (optional)
The meter can be read out from a remote location via an M-bus master unit, if the meter
uses M-bus communication.
M-bus RF communication (optional)
If the meter uses M-bus RF communication, it can be read out remotely.
Tampering
To open the device, the calibration seal at the top of the WS.. must be destroyed.
Self diagnostics
The meter continuously performs self-diagnostics, allowing it to detect a number of mounting
or device errors and to display them.
Technical design
The diagram below shows the typical accuracy of the WS.5.. / WS.6.. compared to the error
limits per EN 1434 class 2.
Metering accuracy as per EN 1434
Key:
EN 1434, class 3
EN 1434, class 2
WS.5.. / WS.6.. typical (EN 1434, ½ class 2)
q Current flow that determines the precision as a percentage of the continuous flow q
p
q
i
Lower flow limit (value 1 on the x axis = 1 % of q
p
):
The smallest flow above which the heat meter must operate without exceeding the
fault limits.
q
p
Continuous flow of meter = Value 100 on the x axis.
- 10
-8
-6
-4
-2
0
2
4
6
8
10
1 10 100
R
e
l
a
t
i
v
e
e
r
r
o
r
s
[
%
]
Flow [%/qp]
Error limit per EN 1434