Ultrasonic heat meter 2WR5
Operating instructions
UH 302-101l
Seite 2 / 3
Service loop 1 („LOOP 1“)
Current flowrate
Current heat output
Current flow and return temperature
Threshold value for the tariff, e.g. T
V
Property number, 7-digit
Date
Annual set day (dd.mm) *)
Heat for previous year on set day *)
Tariff register for previous year on set day *)
Volume for previous year on set day *)
Version of firmware
*) see comment about the yearly set day on page 3
Service loop 2 („LOOP 2“)
In service loop 2 the
monthly values
are displayed.
One of the previous 36 monthly values can be
selected by pressing the button briefly. The corres-
ponding data are then opened by pressing the
button for 3s. Each time the button is pressed briefly
the next value for the selected month is displayed.
Set day previous month Sep. 2004
Set day previous month Aug. 2004
...
Set day previous month xxxx 200y
pressing the button for more than 3s:
Ø
Qty of thermal energy on this set day
Tariff register on this set day, e.g. cold
Volume on this set day
Max. flowrate in Jul. 2004,
changing with date stamp every 2s
Maximum heat output in Jul.,
changing with date stamp every 2s
Max. temperatures in Jul.,
changing with date stamps of flow and
return every 2s
Status of missing time counter on this set
day
After the last item is shown, the current set day is
again displayed. The next set day can be selected
by pressing the button briefly.
Service loop 3 („LOOP 3“)
Parameter of fast pulses,
significance of energy pulses
Significance of volume pulses
Pulse length in ms
Interval of temperature measurement
Date stamp for F0 warning
Type of built in module
M-bus primary address **)
M-bus secondary address **)
**) only shown if module is of type MB
Note: Standard time used inside the meter is the
central europe time (CET).
Monthly values
The calculator stores for 36 months at the set day at
00:00h the values of
- Heat (meter reading)
- Tariff (register reading)
- Volume (reading)
- Max. flowrate (monthly maximum averaged
across the measurement period, standard
60 min), with date stamp
- Max. demand (monthly maximum averaged
across the measuring period), with date stamp
- Max. temperatures (monthly maximum) with date
stamp each for flow and return
- Missing hour counter (reading)
The monthly values can also be read out via the
optical and 20 mA interface.
Error codes
The heat meter performs self-diagnostics
continuously and can thus display various errors.
Error message
F0
means there is air in the volume
measurement part and it is necessary to vent the
heating system thoroughly. Error message
F4
means the battery needs replacing.
Error messages
F1
,
F2
or
F5
,
F6, F8
mean the
sensor is defective.
F3
,
F7
,
F9
indicated a fault in
the electronics. In all these cases, you must contact
service.
