User Manual

12
Siemens
A6V10786229_en
--
_e
Building Technologies 2017-05-12
Technical data
Power supply
Battery type 3 V lithium battery
Battery life Typically 10 years
Functional data
RF:
Radio frequency 868 MHz with <0.1% duty cycle
Transmission power:
● S-mode
● C-mode
2.5 dBm (typically)
7.3 dBm (typically)
Radio protocol Wireless M-bus as per EN 13757-4
Measuring principle:
One- or two-sensor devices
Field of application
1)
:
● One-sensor WHE3x algorithm
● One-sensor WHE4x algorithm
t
min,m
= 55°C, t
max,m
= 105 °C
t
min,m
= 55 °C, t
max,m
= 105 °C
● Two-sensor WHE3x algorithm
– Standard scale:
– Scaled:
● Two-sensor WHE4x algorithm
t
min,m
= 48 °C, t
max,m
= 105 °C
t
min,m
= 35 °C, t
max,m
= 105 °C
t
min,m
= 35 °C, t
max,m
= 105 °C
Start of metering: (t
Z
refers to the temperature of heating medium determined)
● One-sensor devices t
Z
≥ 30 °C (at t
L
= 20 °C) unevaluated
t
Z
≥ 28 °C (at t
L
= 20 °C) evaluated
● Two-sensor devices t
Z
- t
L
≤ 5 K
1)
Definitions according to DIN EN 834:
t
min,m
: Lowest mean design heating medium temperature at which the heat cost allocator may be used. With single-
tube heating systems this is the mean design heating medium temperature of the last radiator in the line
t
max,m
: Highest mean design heating medium temperature at which the heat cost allocator may be used
t
Z
: Mean heating medium temperature of the radiator at which the counter of the heat cost allocator starts up
t
L
: Reference air temperature
t
m
: Mean heating medium temperature
Protective data
Protection class III as per EN 61140
Housing type IP 43 to EN 60529
Ambient conditions
Operation
EN 60721-3-3
Transport
EN 60721-3-2
Storage
EN 60721-3-1
Climatic conditions 3K4 2K3 1K3
Temperature 5...70 °C -25...70 °C -5...45 °C
Humidity < 95% r.h.(noncondensing)
Mechanical conditions 3M2 2M2 1M2
Maximum altitude No data