Data Sheet for Product

4
Siemens
023_A6V11905989_en
2022-01-
07
Tampering
Opening the cover of the meter destroys the user seal. The calibration seal in the interior of
the meter must be destroyed to get to the calibration-related part of the meter.
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 metering accuracy of the WSx8.., 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
WSx8.. 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