Data Sheet for Product

3
Siemens
023_A6V11905989_en
2022-01-
07
Optical communication interface
The meter is equipped with an optical communication interface which facilitates readout and
configuration of the meters on site with the help of the optical read head WZR-OP-USP and
matching UltraAssist service software.
Pulse inputs (optional)
A meter equipped with a pulse terminal can connect up to two water meters with pulse
output (reed contact only, no Namur) to heat energy meters. Consumption values for the
water meters are displayed on the meter and forwarded.
The meter separately adds the pulses from the connected water meters (max. two water
meters) and forwards the result to a data processing system. Service software can help
adjust the pulse valency.
Pulse inputs are inactive by default, i.e. the pulse valency of the water meters = 0 (not visible
on the M-bus). The input becomes active as soon as the pulse input is assigned a pulse
valency (using the service software).
Communication outputs (optional)
You can use one of the following communication modules to remotely read out data:
● Pulse output module
● M-bus module
● RF module (mobile or stationary read out)
The modules do not impact the acquisition of consumption data. You can upgrade the
modules at any time without violating the security seal.
Power supply
The following power supplies are available:
● 1…4 AA cell (batteries)
● Power supply over M-bus (including backup battery)
The number of batteries varies depending on the desired life cycle and communication.
Calibration log book
The calibration log is a special, protected, and separately displayed area to make and log
weather-related changes in the field, i.e. using a set electronic calibration seal.
A category enabled at the factory can be changed up to 5 times via the meter configuration
menu or optical interface.
A change logged by the calibration log book neither changes the present state of energy nor
the historical values.
The following weather-related changes are available:
● Mounting location of the flow measuring section (POS):
Only the calculation rules for forming energy changes if the mounting location of the flow
measuring section is changed.
● Change to energy units (UNIT):
Only the calculation for displaying the internal values change if the energy unit is
changed (kWh – MJ – Mbtu, or MWh – GJ – Gcal). The internal storage format remains
unchanged and all historical values are is displayed in the new energy unit. The meter
automatically complies with requirements for display resolution per EN1434.
● Change in sensor type PT100 – PT500 (Pt Sens):
Calibrations values for PT100 or PT500 are used if the sensor type is changed from
PT100 to PT500. The UH40 must have a duplicate temperature calibration at the factory
for this function. The function is only activated on removable sensors.
● Firmware update (FLASH):
The firmware can only be updated via the optical interface. This permits updates of
meters to the latest communication technologies.