Landis & Gyr Ultrasonic UH50 Configuration guide

UH50 Ultrasound Heat Meter Subject to change without prior notice UH 106-101c Page 1 / 13
Heat Meter Ultrasonic®UH50
Configuration Instructions UH 106-101c
Version: June 2007
Safety information:
)Do not pick up by the electronic unit
)Be careful of sharp edges (thread, flange,
measuring tube)
)Installation and removal must be performed
by qualified personnel only
)Mounting and unmounting are only permitted
when the system is not under pressure
)After installation, a tightness test must be
conducted with cold pressure
)Only ever use under service conditions,
otherwise dangers can arise and the warranty
may be voided
)Breaking the calibration seal voids the
warranty
)The 110 V / 230 V versions must only be
connected by an electrician
)The lithium batteries must be properly
returned
)Lightning protection cannot be ensured; this
must be provided by the building wiring
)Only one compartment for the power supply
must be equipped – do not remove the red
locking hatch
General information
The UH50 heat meter is used for heat consumption
metering in short and long-distance district heating
and in apartment buildings. It is suitable both for cold
metering (alone or in conjunction with metering
quantities of thermal energy) or for pure flowrate
metering in water systems.
Measuring accuracy Class 2 or 3 (EN 1434)
Environment class A (EN 1434) for
indoor installation
Electronic unit
Storage temperature - 20 to 60°C
Max. height 2000 m above MSL
Ambient temperature 5 to 55°C
Ambient humidity < 93 % rel.
Housing degree of prot. IP 54 per EN 60529
Safety class
Line 110 / 230 V AC II per EN 61558
Line 24 V ACDC III per EN 61558
Response threshold f. ∆T0.2 K
Temperat. difference ∆T 3 K to 120 K
Temperat. meas. range 2...180°C
Sensors
Type Pt500 or Pt100
per EN 60751
Temperature range 0...150°C
(< 45 mm overall length)
0...180°C
(> 100 mm overall length)
All volume measuring units
Mounting location return of flow
Mounting orientation any
Settling section none
Metrological class 1:100
Temperature range 10 to 130°C
Maximum temperature 150°C for 2000 h
Maximum overload 2.8 x qp
Nominal pressure PN16, PN25
Nominal flowrate qp
Overall length
Maximum flowrate qs
Minimum flowrate qi
Response threshold
(variable)
Pressure lost at qp
Kv flowrate at ∆p 1
bar
Kv flowrate at ∆p
100 mbar
Weight thread
Weight flange
m³/h mm m³/h l/h l/h mbar m³/h m³/h kg kg
0.6 110 1.2 6 2.4 150 1.5 0.5 1
0.6 190 1.2 6 2.4 150 1.5 0.5 1.5
0.6 DN20 1.2 6 2.4 125 1.7 0.5 3
1.5 110 3 15 6 150 3.9 1.2 1
1.5 130 3 15 6 160 3,8 1,2 1,5
1.5 190 3 15 6 160 3,8 1.2 1.5
1.5 DN20 3 15 6 160 3.8 1.2 3
2.5 130 5 25 10 200 5.6 1.8 1.5
2.5 190 5 25 10 200 5.6 1.8 1.5
2.5 DN20 5 25 10 195 5.7 1.8 3
3.5 260 7 35 14 65 13.7 4.3 3 5
6 260 12 60 24 150 15.5 4.9 3 5
10 300 20 100 40 100 31.6 10 4
10 DN40 20 100 40 165 24.6 7.8 7
15 270 30 150 60 100 47,4 15 8
25 300 50 250 100 105 77,2 24,4 11
40 300 80 400 160 160 100 31,6 13
60 360 120 600 240 115 176,9 56 22
Small heat meters
Overall length 110 mm
Overall length 130 mm

UH50 Ultrasound Heatmeter Configuration Instructions UH 106-101c Page 2 / 13
Overall length 190 mm (thread)
Overall length 190 mm (flange)
Large heat meters with threaded joint
Order no. qp m³/h PN bar a b c
UH50x 45 3.5 16 260 51 G 1¼ B
UH50x 47 3.5 25 260 51 G 1¼ B
UH50x 50 6 16 260 51 G 1¼ B
UH50x 60 10 16 300 48 G 2 B
Large heat meters with flange joint
Order no. qp
m³/h PN bar DN a b Øc Ød Øe
No. of
holes f g
UH50x 46 3.5 25 25 260 51 115 85 14 4 68 18
UH50x 52 6 25 25 260 51 115 85 14 4 68 18
UH50x 61 10 25 40 300 48 150 110 18 4 88 18
UH50x 65 15 25 50 270 46 165 125 18 4 102 20
UH50x 70 25 25 65 300 52 185 145 18 8 122 22
UH50x 74 40 25 80 300 56 200 160 18 8 138 24
UH50x 82 60 16 100 360 68 235 180 18 8 158 24
UH50x 83 60 25 100 360 68 235 190 22 8 158 24
Installation
Based on the dimension drawings, choose a
mounting location with sufficient clearance. Mount
the volume measuring unit between two shut-off
valves in accordance with the arrow on the volume
measuring unit for the direction of flow.
No inlet or outlet sections are necessary. However,
if the heat meter is installed in the shared return of
two heating systems, e.g. heating and hot water, the
mounting location must be a sufficient distance from
the T element that forms the junction (min. 10 ×DN)
to allow the different water temperatures to mix well.
The sensor can be mounted in ball valves or in
pockets. The sensors must be inserted at least up to
the center of the pipe cross-section.
Cavitation must be avoided over the entire
measuring range by overpressure, i.e. at least 1 bar
at qpand approx. 3 bar at qs(at 80°C).
If the water temperature is below 10°C or above
90°C, a split mounting is necessary. In this case the
electronic unit is to be mounted separately from the
volume measuring unit.
A heat meter with a removable control cable may
be separated during the installation. When
installation is done be sure that only paired parts
(volume part, calculator) are connected together.
Ball valve
Example of mounting with a ball valve
(recommended up to DN25)
Welded sleeve
with pocket
Example of mounting with pockets
(recommended above DN25)
For use as a cold meter:
-Only mount in the return
-Choose the split version because of water
condensation
alternative
mounting
option

UH50 Ultrasound Heatmeter Configuration Instructions UH 106-101c Page 3 / 13
Operating elements
−LCD button 1 (“Loop“); advances to the next
loop
−LCD button 2; advances to the next line within a
loop
−Service button, inside
−Calibration button, inside (to be operated with a
service tool – not included in scope of supply)
The service button and calibration button are not
accessible until the housing cover is removed.
The calibration button is additionally protected by an
adhesive label.
The optical interface permits data communication via
a computer with the necessary read-out software,
e.g. PappaWin.
Displays
The places after the decimal point of displayed
values are indicated by a surrounding border.
Calibrated values can be recognized by the star
symbol shown in addition to the value.
The displays of the heat meter are arranged on
several levels (LOOPs). LCD button 2 advances the
display of the user loop (LOOP 0) cyclically.
Note: Depending on how the unit is parameterized,
the number of items displayed and the data shown
may differ from this description. Certain button
functions may also be disabled.
User loop (“LOOP 0”)
Head of the loop
Accumulated quantity of heat with tariff status
Tariff register 1 (optional)
Accumulated volume
Segment test
Error message with error code number
LCD button 1 is used to switch the display from the
user loop to the selection of service loops
(LOOP 1..n).
Service loop (selection)
Service loop 1
Service loop 2
...
LOOP n Service loop n
LCD button 1 advances the display to the next loop.
After the last loop, the user loop (LOOP 0) appears
again.
LCD button 2 displays the content of the selected
service loop.
Within a loop, the LCD button 2 is used to advance
to the next line of the display. After the last line of
the display, the first display line appears again.
Service loop 1 (“LOOP 1”)
Head of the loop
Current flowrate
Current heat power
Current flow/return temperature
Operating time
Operating time with flowrate
Missing time
Property number, 8-digit
Date
Yearly set day (DD.MM)
Quantity of heat previous year on set day
Volume for previous year on set day
Firmware version
Service loop 2 (“LOOP 2”)
In service loop 2, the maxima are displayed. LCD
button 2 calls the displays one after the other.
Head of the loop
Max. flowrate,
at 2s intervals with date stamp
Max. power,
at 2s intervals with date stamp
Max. temperatures,
at 2s intervals with date stamp
for flow and return maximum
Measuring period for maximum calculation

UH50 Ultrasound Heatmeter Configuration Instructions UH 106-101c Page 4 / 13
Service loop 3 (“LOOP 3”)
Service loop 3 shows the monthly values. LCD
button 1 is used to select a month out of the 18
previous months. The data for that month are then
opened with LCD button 2. Each further press of
LCD button 2 shows the next value for the selected
month.
Head of the loop
Set day for December 2005
Set day for November 2005
...
Set day for July 2004
using LCD button 2: Ø
Quantity of heat on the set day
Tariff register 1 on the set day
Volume on the set day
Max. flowrate on the set day,
at 2s intervals with date stamp
Max. heat power on the set day,
at 2s intervals with date stamp
Max. temperatures on the set day,
at 2s intervals with date stamp
for flow and return maximum
Missing time count on the set day
After the last display, the previously selected set day
is displayed again. Pressing LCD button 1 selects
the next set day.
Service loop 4 (“LOOP 4”)
Service loop 4 shows the unit parameters. LCD
button 2 calls the displays one after the other.
Head of the loop
Current tariff,
at 2s intervals with threshold value 1
Measuring interval for flowrate
Measuring interval for temperature
Module 1: M-bus module
M-bus primary address 1
M-bus secondary address 8-digit
Module 2: pulse module; chan. 1 = heat quantity
Channel 2 = volume, at 2s intervals
Significance for heat quantity pulses *)
Significance for volume pulses *)
Pulse duration in ms *)
*) for “fast pulses”
Previous year’s values
The electronic unit stores the meter readings for
quantity of heat, volume, the tariff register, missing
time, and flowrate measuring time as well as the
current maxima for flowrate, power, temperature
difference, flow temperature, and return temperature
with their date stamps on a yearly set day.
Monthly values
The electronic unit stores the meter readings for
quantity of heat, volume, the tariff register, missing
time, and flowrate measuring time as well as the
monthly maxima for flowrate, power, temperature
difference, flow temperature and return temperature
with their date stamp for 18 months on the set day of
each month.
Note: The standard time used is Central European
Time (CET). If daylight-saving time is activated,
storage will be performed accordingly.
The monthly values can also be read out via the
optical and the 20 mA interface.
Resolution of the display
kWh
MWh *)
MJ
GJ *)
m³
*) Places after decimal point "blinking", "static" or "suppressed"
10 15 25 402,5 3,5 60
Nom. flowrate in m³/h
0,01 GJ
m³/h
0,1 GJ
0,01 MWh
0,001 GJ
0,001 MWh
1 kWh
1 MJ
0,001 m³/h 0,01 m³/h
0,01 m³ 0,1 m³
0,6
The number of places after the decimal point of a
value is based on the chosen measurement path
and the chosen dimension.
Power supply
The UH50 can be powered from a power supply
module or with a battery.
The type of battery used for battery operation
depends on the requirements.
Requirements
(for measuring timebase Q = 4 s
and measuring timebase T = 30 s)
6 years
11 years
No M-bus fast read-out,
without controller function
2x AA
D
M-bus fast read-out or fast pulses
or analog module or radio module D --
Automatic power supply detection
The power supply unit detects whether a line voltage
is applied. This signal is routed to the UH50. That
enables the device to detect automatically whether it
is being powered from a battery or power supply
unit.
Power supply modules
24 V AC/DC 110 V AC, 230 V AC
Pollution degree per EN 61010
(no or only dry, non-
conductive soiling)
Ambient temperature + 5.. + 50°C
Storage temperature - 20..+ 60°C
Back-up time during power failure
(power reserve) > 20 minutes

UH50 Ultrasound Heatmeter Configuration Instructions UH 106-101c Page 5 / 13
24 V safety extra-low voltage
Voltage 12..36 V AC or 12..42 V DC
Frequency 50 / 60 Hz or DC
Galvanic isolation 1000 V DC
Power consumption maximal 0.8 VA
Terminals 2 x 1.5 mm²
For connecting cable about, Ø 5.0..6.0 mm
110 V or 230 V alternating voltage
Voltage 85..121
V AC
or 196..253 V AC
Type Safety class II
Frequency 50 / 60 Hz
Line voltage max. 10% of the nom.
fluctuations voltage
Overvoltage category II
per EN60010 2500 V impulse voltage
Power consumption maximal 0.8 VA
Relative humidity less than 93 % for T < 50°C
Cable length 1.5 / 5 / 10 m
Fuse protection 6 A MCB
Interfaces of the electronic unit
The UH50 heat meters are equipped with an optical
interface per EN 62056-21:2002 as standard.
Moreover, up to two of the following communication
modules can be used for remote reading (for
restrictions, see Page 5):
•Pulse module (pulses for quantity of heat /
volume / unit status / tariff register 1 / tariff
register 2; isolated, bounce-free)
•CL module (passive 20 mA current loop per EN
62056-21:2002)
•M-bus module per EN 1434-3, fixed and
extended, variable protocol (also for coupling
with a suitable heating controller)
•Analog module
•Radio module
•Multi-module (external)
These modules are have no effect on consumption
metering and can therefore also be replaced at any
time without violating the adhesive label.
Terminals
2-pole and 4-pole terminals are used for connecting
external cables to the modules.
Strip-back length: 5 mm
Connection capacity
−rigid or flexible, 0.2 – 2.5 mm²
−flexible with end ferrules, 0.25 - 1.5 mm²
−conductor sizes 26 - 14 AWG
Multiple-conductor connection (2 conductors of
same cross-section)
−rigid or flexible, 0.2 – 0.75 mm²
−flexible with end ferrules without plastic
sleeve, 0.25 – 0.34 mm²
−flexible with TWIN ferrules with plastic
sleeve, 0.5 – 0.75 mm²
Recommended screwdriver: 0.6 x 3.5 mm
Tightening torque: 0.4 Nm
Permissible combinations of modules
Slot for module #2 is equipped
with...
Pulse
module
AM = Analog module
MB = M-bus module
CL = CL module
RM = Radio module AM
“standard“
“fast” *)
MB CL RM
AM
yes yes yes
yes (4)
yes yes
“standard”
yes (3) yes (2) yes (4)
yes yes yes
Pulse module **)
“fast”
no no no no no no
MB
yes yes yes yes
(4)
yes
(1)
yes
CL
yes yes yes yes
(1)
no
yes
Slot for module #1 can be equipped with ...
RM
no no no no no no
Restrictions:
*) only 1 module with fast pulses is possible;
only permissible on slot 2;
min. pulse duration :
- 2 ms, if pulse module 1 not fitted
- 5 ms, if pulse module 1 fitted
**) Subsequent mounting of a further pulse module
in module slot 1 can result in changed output values
for module 2!
(1) For M-bus with controller coupling, the CL read-
out can take up to 40 s
(2) Pulse length of the fast pulses min. 5 ms
(3) The first and second channel can be
parameterized individually
(4) The secondary address for both modules can
only be changed via module No. 1
Pulse module
Pulse module
Pulse output:
Channel 1,
Channel 2
The pulse module permits the output of pulses that
can be derived from the quantity of heat, the volume,
tariff register 1 or tariff register 2. Two channels are
available whose functions can be parameterized
with the PappaWin software.
Output takes the form of standard pulses or “fast
pulses”. The pulse duration is identical for channel 1
and channel 2.
Note: If two pulse modules are plugged, please note
the restrictions!

UH50 Ultrasound Heatmeter Configuration Instructions UH 106-101c Page 6 / 13
Parameter setting for standard pulses
Output mode Output value
CE
(count energy) Pulses for quantity of heat
Chan.1
C2
(count tariff 2) Pulses for tariff register 2
CV
(count volume) Pulses for volume
CT
(count tariff 1) Pulses for tariff register 1
Channel 2
RI
(ready indication) Pulses for the operating states
"Ready / Fault"
Parameter setting for “fast pulses”
Channel 1 Channel 2
CV (count volume)
CE
(count energy) - (no function)
CV (count volume)
CV
(count volume) - (no function)
CV (count volume)
CE / CV *)
(count energy / count volume) - (no function)
*) automatic output of the higher pulse rate
Labeling pulse module
Type open collector
Voltage maximal 30 V =
Current maximal 30 mA
Dielectric strength 500 Vrms against ground
Classification OB (per EN 1434-2)
Voltage drop approx. 1.3 V at 20 mA
Classification OC (per EN 1434-2)
Voltage drop approx. 0.3 V at 0.1 mA
Output connection
(standard version):
A special version of the pulse module is available
with an Opto-MOS output.
Advantages: low voltage drop and polarized
(bipolar).
Standard pulses
Standard pulse significances
kWh *)
MJ *)
m³
10 15 25 402,5 3,5 60
Nom. flowrate in m³/h
10 MJ
0,6
1 kWh 10 kWh
1 m³0,1 m³
100 MJ
1 MJ
*) depending on the unit for heat display
Pulses for quantity of heat, volume, tariff register
Period duration > 200 ms
Pulse duration 100 ms conducting
Pulses for operating states:
“Ready” pulsed “conducting”, i.e.
100 … 200 µs pulse duration,
500 ms period
“Fault” constantly “non-conducting”
Fast pulses
Note: In battery operation, a D cell is required!
For applications, such actuating controllers or as
flowrate transmitters, higher pulse rates are
required. The parameters required for this (pulse
significance, pulse duration), can be configured with
the PappaWin software.
The maximum pulse frequency is 33 Hz.
The following can be set:
•Pulse type: “linear” or “scaled” pulses *)
•Pulse output: energy or volume
•Pulse duration, if only 1 pulse module is fitted:
from 2 ms to 100 ms in steps of 1 ms;
Pulse duration, if 2 pulse modules are fitted:
von 5 ms to 100 ms in steps of 5 ms
The pulses can be received and evaluated with a
suitable device. The settings must be made in
accordance with the information on the data sheet of
the controller.
*) Linear pulses are output proportionally to the
measured value. In the case of scaled pulses, the
number of pulses at the upper and lower end of the
range can be defined. In this case, the pulse
receiving device can detect, for example, a
connection error.
Linear pulses Scaled pulses (example)
CL module
CL module
RTX+,
RTX-
The CL module can be used to set up a point-to-
point link enabling the heat meter to be read
remotely, for example, at the front door.
Display in LCD CL (current loop)
Standard per EN 1434-3
Type passive current loop
Baudrate 2400 Baud, fest
Isolation galvanic
Polarity yes
Voltage 30 V maximal
Current 30 mA maximum
Voltage drop < 2 V at 20 mA
Literature TKB 3415

UH50 Ultrasound Heatmeter Configuration Instructions UH 106-101c Page 7 / 13
Data scope
- Update on each read-out
Property number; unit number; firmware version;
fault messages; missing time; operating time;
quantity of heat; tariff register; volume; mounting
location; adjustment values; unit configuration data;
measuring range; M-bus addresses; system date
and time; previous year’s values with set day for
quantity of heat, tariff and volume; maximum power;
fault duration and 18 monthly values for quantity of
heat, tariff register, volume, missing time, maximum
power, maximum flowrate, measuring period with
maxima for power, flowrate and temperatures; actual
values for power, flowrate and temperatures.
M-bus module
M-bus module
Pos. 2 Pos. 1
Jumper
M-Bus
With the M-bus module, it is possible to read several
heat meters from a central station.
The data frame can be defined with a jumper.
Jumper in pos. 1 “fixed frame”
Jumper in pos. 2 “guaranteed frame”
Jumper in “center” “variable frame”
Note: If two M-bus modules are plugged, note the
restrictions on Page 5!
Display in LCD MB (meter bus)
Standard per EN 1434-3
Isolation galvanic
Connection with galvanic isolation
Voltage 50 V maximal
Current consump. 1 M-bus load (1.5 mA)
Addressing primary or secondary
Transmission rate 300/1200/2400/4800 Baud
Literature TKB 3417
Read-out frequency any, also with battery
Data scope with fixed data frame:
- Update after every 15 minutes
Property number; quantity of heat; volume; setting
and resetting a user lock; setting of date and time
and setting of the primary and secondary address.
Data scope with variable/guaranteed data frame:
- Update after every 15 minutes *)
Property number; unit number; manufacturer’s
identifier; medium; firmware version, fault messages;
missing time; operating time; quantity of heat;
volume; previous month’s values for quantity of heat,
tariff register, volume, maximum power and missing
time; previous year’s values for quantity of heat,
volume and maximum power; measuring period with
maxima for power, flowrate and temperatures; actual
values for power, flowrate and temperatures; F0 pre-
warning; setting and resetting a user lock; setting
the date and time, and the primary and secondary
address.
*) Special version with minimum update rate of 30 s
can be supplied (WZU-MB-30); but it has a
shorter battery life
Data scope for fast readout:
- Update after a minimum of 4 s
Property number; quantity of heat; volume; actual
values for power, flowrate and temperatures, and
setting the date and time.
Fast read-out via the M-Bus is only permissible with
the appropriate battery (D cell for 6 years) or a
power supply module.
Analog module
Analog module
Outputsignal:
Channel1,
Channel2
The analog module converts a selectable measured
value of the heat meter into an analog output signal
(channel 1, channel 2).
The following measured values can be selected:
-Heat power
-Flowrate
-Flow temperature
-Return temperature
-Temperature difference
The following can be selected as the output signal:
-0..20 mA
-4..20 mA
-0..10 V
A minimum value can be defined for each channel,
below which the output does not fall, irrespective of
the measured value. This enables detection of a
wire break, for example.
Parameter setting (selection of the measured value,
output measuring range, and minimum value) is
performed via the heat meter using the PappaWin
software.
The output signal is updated in a 4-second
timebase.
An LED (ERR) indicates the current operating state.
Display on LCD AM (analog module)
Power supply
The power supply of the module is drawn from an
external connector power supply unit (not included
in the scope of supply). If the heat meter is operated
with a battery, a 6-year battery of type D (“for all
applications”) is required.
Note: CE compatibility (“CE mark”) is only ensured
in conjunction with the intended power supply unit.

Use only the specified power supply unit!
Use of an unsuitable power supply unit can
result in malfunctions or destruction of the
heat meter or module.
Analog output
For the current output, a maximum burden (load) of
100 ohm is permissible.
The voltage output is not short-circuit-proof.

UH50 Ultrasound Heatmeter Configuration Instructions UH 106-101c Page 8 / 13
Radio module
Radio module;
with internal or
external antenna
Pulse inputs:
Channel 1,
Channel 2
With its integrated antenna, the radio module
permits wireless read-out from a distance of up to
100 meters. For special mounting situations, the
radio module can be supplied as a version with an
external antenna.
The module is programmed via radio telegrams.
With a button, the transmit parameters can be reset
to default values.
Two LEDs indicate the current operating state.
The power supply of the module is drawn from the
heat meter. If the heat meter is operated with a
battery, a 6-year battery of type D (“for all
applications”) is required.
The module contains an additional two pulse
counters to acquire external counting pulses.
The following must be noted concerning the inputs
for the pulse counters:
- Only connect isolated contacts (Reed contact,
no open collector)
- No galvanic isolation of the electronics of the heat
meter
- External power source or grounding not
permissible
Display on LCD RM (radio module)
Technical data radio
Frequency 433 MHz
Range up to 100 meters
(with integrated antenna)
Read-out frequency max. 1 read-out per day
(average)
Technical data pulse counters
Pulse counters: 2 inputs for external pulses
Counter range: 0..99,999,999
Pulse significance: 0.001...999.99
Counter identifier: 8-digit
Min. pulse length: 50 ms
Max. pulse rate: 5 pulse/s when using both
channels
Max. pulse rate: 10 pulse/s when using only
one channel
The radio module reads the data either when data is
requested or only once per day.
The heat meter must be functioning in normal mode.
The data are packed and output in various telegram
types.
Data content
All telegrams are preceded by the time stamp (date
and time) and the property number.
Telegram type: Content:
“Basic” Cumulated values and error status
“Previous year” Cumulated previous year’s values
and error status
“Previous month” Cumulated previous month’s values
and error status
“Extended” Current instantaneous values, stored
maximum values and error status
“Pulse and service” Data of the pulse counter
Multi module
The external multi module extends the heat meter by
another three module slots for 2WR5 modules. That
enables operation with a UH50 module and three
2WR5 modules.
Block diagram multi module
Module #2
e.g. M-bus
Module
*)
Module #1
z.B. Funkmodul
*)
Module #3
e.g. analog
module
*)
Multi
module
Pulse output
Button
Coding switch
LEDs M-bus
10V / 20 mA
M-bus
Power supply
Radio
*) The module combination is only
an example Pulse energy
Pulse volume
Pulse operating status
Pulse tariff 1
Pulse input #1
Pulse input #2
Adapter
plate
in meter
Display on LCD MM (multi module )
The following modules of type 2WR5 can be used
without restriction:
-M-bus module
-Analog module
-Radio module
If several M-bus modules are used, one module
functions as the master. The addresses of the M-
bus modules can be changed independently via the
M-bus system. If the master address is changed it is
written back to the heat meter.
The bus address of the master can also be changed
via the heat meter.
The multi module has one pulse output each as
standard for energy, volume, operating status and
tariff register 1.
The multi module is configured using the 3 button
and the 2 coding switch.
The operating state is displayed on LEDs, further
LEDs indicate the status of the output pulses.
For further details and a separate description, see
“WZX-MM Multimodule Installation and Service
Instructions”.

UH50 Ultrasound Heatmeter Configuration Instructions UH 106-101c Page 9 / 13
Tariff control (optional)
The following options are available for tariff control.
Note: The summation of the quantity of heat and
volume in the standard registers is performed
independently of the tariff situation!
Threshold value tariff (tariffs T2, 3, 4, 5, 6)
Tariff registers 1, 2 and 3 can be controlled via up to
3 threshold values.
Either the quantity of heat or the volume can be
summated in the tariff registers.
The threshold values can be derived from the
flowrate (tariff T2), the heat power (tariff T3), the
return temperature (tariff T4), the flow temperature
(tariff T5) or the temperature difference (tariff T6).
Supplied quantity of heat (tariff T7)
In tariff register 1, a quantity of heat is summated
that is calculated from the flow temperature (instead
of from the temperature difference).
Returned quantity of heat (tariff T8)
In tariff register 1, a quantity of heat is summated
that is calculated from the return temperature
(instead of from the temperature difference).
Heat/cold meter (tariff T9)
In tariff register 1, the measured quantity of cold; in
tariff register 2, the measured quantity of heat is
summated. In both cases a threshold can be defined
via the flow temperature (“cold threshold”, “heat
threshold”).
Temperature above “heat threshold” and
temperature difference > +0.2 K --> quantity of heat
is acquired
Temperature below “cold threshold” and
temperature difference < -0.2 K --> quantity of cold
is acquired
Tariff control via timer switch (tariff T10)
For tariff control, one switch-off time and one switch-
on time per day can be defined. At the switch-on
time, summation of the quantity of heat or volume is
started in tariff register 1; at the switch-off time, it is
ended.
Tariff control via M-bus (tariff T11)
In tariff registers 1, 2 and 3, either the quantity of
heat or the volume can be summated. With the
relevant M-bus command, one of the 3 tariffs can be
activated or all tariffs can be deactivated.
Surcharge quantity tariff by means of return
temperature (tariff T12)
The quantity of heat is summated depending on the
return temperature in tariff registers 1 or 2.
The summated quantity of heat is calculated from
the difference of the return temperature from the
defined return temperature threshold (instead of
from the temperature difference).
Above return threshold: T1 is summated
Below return threshold: T2 is summated
Display of the tariff situation on the LCD
The current tariff status is shown in the user loop
together with the quantity of heat or the volume.
No tariff status is shown for tariffs T7 and T8.
for tariffs T2, T3, T4, T5, T6, T10, T11 and T12
no tariff register active
tariff register 1 active
tariff register 2 active
tariff register 3 active
for tariff T9 (cold/heat meter)
no tariff register active
tariff register 1 active
tariff register 2 active
The type of tariff and the associated parameters are
displayed in service loop LOOP 4.
for T2, T3, T4, T5, T6
at intervals of 2s with threshold value 1/2/3
for T7
for T8
for T9;
at intervals of 2s
for T10;
switching times at intervals of 2s
for T11
for T12
The contents of the tariff registers are displayed in
the user loop after the quantity of heat.
for tariffs T2, T3, T4, T5, T6, T10, T11 and T12
tariff register 1
tariff register 2
tariff register 3 (not for T12)
for tariff T7
for tariff T8
for tariff T9,
at intervals of 2s
Error messages
The heat meter constantly performs self-diagnostics
and can display various error messages.
Error Error / action to be taken:
code:
F0 No flow;
air in measuring unit / pipe, vent pipe
F1 Interruption of flow sensor
F2 Interruption of return sensor
F3 Electronic for temperature evaluation defective
F4 Battery empty; replace!
F5 Short-circuit flow sensor
F6 Short-circuit return sensor
F7 Fault in the internal memory
F8 F1, F2, F3, F5 or F6 pending for longer than 8 hours.
No more measurements are performed.
F9 Error in the electronics
Message F8 has to be reset in parameter setting
mode (manually, PappaWin). All other error
messages are cleared automatically once the error
has been corrected.

UH50 Ultrasound Heatmeter Configuration Instructions UH 106-101c Page 10 / 13
Log functions
Logbook
In the internal logbook, metrologically relevant
events (errors, states, actions) are stored in
chronological order with their time of occurrence.
The events acquired are predefined. The data of the
logbook cannot be deleted.
Each event is stored in a separate 4-level shift
register; the overflows are transferred to a 25-level
circulating buffer. Therefore, at least the last 4 times
can be traced for each event.
In a monthly register, the error states are stored for
the current month and for the past 18 months
(without time stamp).
Ser
No. Type Description
1 F0 = Air in measuring tube
2 F1 = Interruption flow sensor
3 F2 = Interruption return sensor
4 F3 = Error temperature electronics
5 F5 = Short-circuit flow sensor
6 F6 = Short-circuit return sensor
7 F8 = Sensor error > 8 hours
8
Error occurs or back-to normal
F9 = ASIC error
9 Above max. temperature in the volume
measuring unit
10 Below min. temperature in the volume
measuring
11 Max. flowrate qs was exceeded
12 Soiling warning
13 Line voltage off
14
State occurs or ends
CRC error occurred
15 Adjustment values parameterized
16 F7-(EEPROM) pre-warning
17 Reset made
18 Date / time parameterized
19 Yearly set day parameterized
20 Monthly set day parameterized
21 Master reset performed
22 All times deleted
23 Missing time deleted
24
Event occurs
Maxima deleted
Read-out is performed via the optical interface with
the PappaWin software.
Data logger (optional)
The data logger permits the archiving of data that
the user can select from a predefined set of values.
The data logger contains four archives whose 8
channels can be assigned.
The data can be assigned to any of the channels.
Archive Timebase Storage
depth
Averaging
time for
maximum
Hourly
archive 1 hour 45 days 1 hour *)
Daily
archive 1 day 65 days 1 hours
Monthly
archive 1 month 15 months 1 hours
Yearly
archive 1 year 15 years 1 hours / 24 hours
*) For a shorter measuring period than 1 hour, the
largest value from the maximum values calculated
within one hour applies.
The data are recorded with the value and time
stamp.
Read-out is performed via the optical interface with
the PappaWin software .
Note: Data transmission is in a manufacturer-
specific format.
Value set for data to be recorded
Meter readings
at the end of the period
for...
Quantity of heat
Tariff register 1
Tariff register 2
Tariff register 3
Volume
Operating duration *)
Fault duration *)
Pulse input 1
Pulse input 2
*) depending on parameter
setting: hours or days
Instantaneous values
at the end of the period
for...
Power
Flowrate
Flow temperature
Return temperature
Temperature difference
Error display
Maximum for...
Power
Flowrate
Flow temperature
Return temperature
Temperature difference