Landis+Gyr ULTRAHEAT 50 Series User manual

FOR INTERNAL USE ONLY!
Landis+Gyr GmbH Subject to change without prior notice UH606-101b Page 1of 38
Glossary Ultrasonic ® UH50
Last update: 2007-06-29
This glossary is part of the UH50 documentation and replaces the previous basic
documentation. It is intended to be used as online help and as a reference work. The content is
arranged in alphabetic order of key words and is intended for simple navigation with hyperlinks.
The index is at the end.
The key words are marked boldface type and surrounded by a border.
Note: This glossary is updated at regular intervals. Please check whether a new version is
available from time to time. Changes are not marked!
Important changes are marked in red color.
If you have any corrections or additions to make, please contact Landis+Gyr IMS QM.

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Automatic switch-on can be activated in the factory if the UH50 is not supplied with the
battery connected (e.g. if powered through a power supply unit). On subsequent start-up, the
date and time are not defined. In this case, the UH50 enters the input menu when the power
supply is connected.
Entry of the date
Entry of the time
Return to normal mode (manual)
The LCD button 1 can be used to call the menu lines one after the other. Entry of the date and
time is described under Parameter setting menu.
On (manual) return to normal mode, automatic switch-on is permanently deactivated, even if the
date or time has not been entered!
If no entry is made, the UH50 automatcical returns to normal mode after no more than 15 hours
*) and automatic switch-on remains active. The next time the power supply is connected or on
power recovery, the input menu will be displayed again.
Note: Automatic switch-on is only active if the calibration seal is set!
*) Attention: Currently there is a deviant behaviour.
“The automatical quitting of the menu after 15 hours does not work. The user must be informed
that it is essential to leave the menu manually. Otherwise the meter will not count any values.”
Note: In firmware 5.06 an higher this error is removed.
The UH50 can output the data part of the response telegram (according to EN62056-21 Mode
B) with an increased baudrate. The 5th character of the ID telegram (“/LUGxUH50”)
corresponds to the code for the increased baudrate.
Code Baudrate
C 2400 baud
D 4800 baud
E 9600 baud
F 19200 baud
After the ID telegram, the data part is transmitted with this increased baudrate.
The parameter for the high baudrate value is set by telegram in calibration mode (Eb), test
mode (Pb) or or normal mode (Nb).
It is also possible to parameterize whether the increased baudrate will apply to all data traffic or
just to the next telegram.
Calibration mode (“Eb”) can be called after opening the cover with the calibration button (=
short-circuiting of two pads for 3 s; operated with a service tool).
Calibration mode
As long as the calibration seal is not set, calibration mode can also be called by telegram via the
optical interface.
Calling calibration mode using the pads automatically resets a set calibration seal!
Return to normal mode is performed
−By telegram, e.g. via PappaWin
−By pressing a button (LCD button 1 or 2)
−Automatically no more than 15 hours later.
The calibration seal prevents subsequent changing of protected unit parameters that are
relevant for measurement. For example, calling calibration mode by telegram is blocked.
Setting the calibration seal terminates any simulation that may be in progress (flowrate or
temperature). Exception: “Permanent return simulation”.
After the calibration seal has been set and a volume of 10 liters has then flowed through, the
accumulated missing time is set to zero.
A
B
C

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An unset calibration seal is indicated by permanent display of three arrows. In this case, the
display function is inverted, i.e. in the case of a previous year’s value, previous month’s value,
or tariff value, the relevant symbol blinks.
Cold meter
For the cold meter or combined heat/cold meter, it is important to ensure that the black cover
on the measuring tube is pointing sideways or downward (because of condensation).
The measuring tube must always be installed in the return. The electronic unit must be
mounted separately from the flowrate measuring tube, for example, on the wall (split mounting).
Please ensure that no condensed water can run along the connected pipes into the electronic
unit (make a strap downwards).
Data logger (“archive”)
The data logger contains 4 archives. Per archive, 8 channels are possible.
The number of channels is stated in the order and is parameterized in the factory.
Archive
No. Archive type Timebase Storage depth Averaging time for maximum
1 Hourly archive 1 hour 45 days 1 hour *)
2 Daily archive 1 day 65 days 1 hour
3 Monthly archive 1 month 15 months 1 hour
4 Yearly archive 1 year 15 years 1 hour / 24 hours
*) For a shorter measuring period than 1 hour, the largest value from the maximum values
calculated within one hour applies.
The user can select the data to be recorded from a predefined value set and assign them to any
of the channels. The assignment is performed in service mode using PappaWin.
The data are recorded with their value and time stamp.
For internal information only:
When the date / time is set, maxima already calculated are reset and maximum calculation
begins afresh.
Adjustment of the date / time, can result in double or missing times.
The year in the time stamp is stored in 2 digits only, allowing only the range 2000...2099 to be
displayed.
Value set for data to be recorded
Meter readings at the end of the period for...
Quantity of heat
Volume
tariff register 1, tariff register 2, tariff register 3
Operating time *)
Fault duration *)
Pulse input 1, Pulse input 1
Flow rate measuring time
*) as parameterized: hours or days
Instantaneous values at the end of the period
for...
Power
Flowrate
Temperature difference
Flow temperature
Return temperature
Error display (instantaneous error codes)
Maximum for...
Power
Flowrate
Temperature difference
Flow temperature
Return temperature
The archive data are only output via the optical interface using PappaWin. They are transmitted
in a proprietary format (not AGFW format).
D

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Details concerning calibration law
The software contains a part “requiring official calibration” and a part “not requiring official
calibration”.
Approval of the UH50 under calibation law refers to the part “requiring official calibration”. This
part contains the sensing and processing of the consumption values and must not be altered
without an additional endorsement in the approval. The part “not requiring offical calibration”
contains functions that are not relevant to billing.
There are separate version numbers for the parts requiring and not requiring calibration. For the
part requiring calibration, there is a CRC checksum.
Firmware version of part requiring calibration (example)
Firmware version of part not requiring calibration (example)
CRC sum for part requiring calibration (example)
The values subject to calibration law (“calibrated values”) are marked by an additional symbol
(*) on the LCD.
In Germany, small heat meters (up to including DN25) may be installed according to Directive
2004/22/EC Annex MI-004 Nos. 1.1 to 1.4 on new installation only with directy immersed
sensors.
Error display
The error message F8 and the accumulated missing time can be reset in parameter setting
mode. This also deletes the flowrate measuring time!
The missing time is automatically reset after the calibration seal has been set (after a measured
flowrate of 10 liters).
F0 Air in the volume measuring part
- if measuring threshold < US signal < warning threshold, then:
“contamination message” with time stamp;
not treated as missing time (no F0 display on LCD)
- if US signal < measuring threshold, then:
“soft F0”; is evaluated as missing time;
output values for flowrate and power are not defined (no LCD values, no pulses,
“empty parentheses” in the telegram); no heat addition
- if “soft F0” is uninterrupted for longer than 8 hours, then:
“hard F0”, is evaluated as missing time;
the measurement timebase for the flowrate and temperature is increased to 100 s
F1
F2
Open-circuit flow sensor
Open-circuit return sensor
- is evaluated as missing time;
output values for flow/return temperature, temperature difference and power are not
defined (no LCD values, no pulses, “empty parentheses” in the telegram); no heat
addition
F3 Temperature electronics defective;
- Response as for F1/F2
F4 Supply voltage too low
- Response as for “hard F0”
F5
F6
Short-circuit flow sensor
Short-circuit return sensor
- Response as for F1/F2
F7 EEPROM defective
- No display while the error can be corrected via checksum
- Non-recoverable error in the part requiring calibration: no more measuring
- Recoverable error in the part requiring calibration: no F7 display on LCD, but error
output via data telegram
- Errors in the part not requiring calibration: data affected are not plausible and are
therefore not output
E

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F8 F1, F2, F3, F5 or F6 for 8 hours (unless F0, F4, F7 or F9 has been detected)
- Response as for F1/F2
F9 Internal communication between ASIC and µC defective
- Response as for “hard F0”
The occurrence of an error is recorded in a logbook (“occurrence” and “back to normal”). This
does not apply to F4 and F7, because in these cases the EEPROM is blocked for write access.
A negative flow or negative temperature difference is displayed correctly (is not treated as
missing time).
Within limits, software errors can be rectified by means of an internal bugfix mechanism.
EU directive conformity declaration
The following text has been included in the Operating Instructions (not the Configuration
Instructions or the Installation and Service Instructions):
Landis+Gyr hereby declares that this
product complies with the essential
requirements of the following directives:
−2004/22/EC measuring instruments
directive
−89/336/EEC electromagnetic
compatibility of electrical and electronic
devices
−73/23/EEC low-voltage-directive
EC type examination certificate
DE-06-MI004-PTB018
EC design-examination certificate
DE-07-MI004-PTB010
Factory-fitted sensors
If sensors are fitted in the factory, the cable must not be disconnected, shortened, or extended.
“Fast pulses” for the pulse module are parameterized using the PappaWin software.
When fitting with modules, please pay attention to the permissible combinations.
By default, standard pulses are output through the pulse module.
100%
Gradient
n-min
n-max
F

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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
Note: For 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 pro-
portionally 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. This enables the
pulse receiving device to detect, for
example, a connection error.
Linear pulses
Scaled pulses (example)
The flowrate measuring time (=“Operating time with flowrate“) (--> Timer) is acquired with a
separate counter. The time acquired refers to the time over which a flowrate > response
threshold was detected based on the measured values.
General information
The UH50 meter senses the flow velocity of the heating (or cooling) water with non-wearing
ultrasound technology and measures the temperatures in the flow and return using Pt resistors.
The k factor of the heating water is stored in µC as an algorithm. The engineering unit "quantity
of thermal energy" is calculated from the values flow velocity, temperature (difference) and k
factor.
The UH50 is used as a:
−Heat meter
−Cold meter
−Combined heat/cold meter
−Flow meter
Incorrect installation (mounting error) of the heat meter on site is indicated a relevant error
display. For this purpose a flow is needed!
Incorrect flow direction
Incorrect sensor installation or connection
If both causes of error apply, the incorrect direction of flow has priority. Then the display for the
wrong sensor installation/connection will only appear when the volume measuring unit is turned
round.
G
I

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Note: These messages can also occur in the event of a system stoppage without incorrect
installation.
Installation
Choose a mounting location with enough clearance, based on the dimension drawings.
Mount the volume measuring unit horizontally or vertically between two shut-off valves in
accordance with the arrow 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. 10x DN) to allow the different
water temperatures to mix well.
The sensors can be mounted in ball valves or in pockets or directly. The ends of the sensors
must be inserted at least up to the center of the pipe cross-section.
By overpressure, cavitation must be avoided in the entire measuring range, i.e. at least 1 bar at
qp and approx. 3 bar at qs (at 80°C).
Example of mounting with a ball valve
(recommended up to DN25)
Ball valve
Example of mounting with pockets
(recommended above DN25)
Welded sleeve with pocket
Interfaces of the electronic unit
The UH50 heat meters are equipped with an optical interface per EN 61107 as standard.
Moreover, up to two of the following communication modules can be used for remote reading:
•Pulses (quantity of heat / volume / unit status / tariff register 1, tariff register 2),
isolated, bounce-free
•Passive 20 mA current loop (CL) per EN 61107
•M-bus 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.

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The LC display consists of 4 alphanumeric digits (+ various special characters), 7 numeric
digits (with decimal points), 3 arrow symbols and a star.
LC display
The arrow symbols identify output of a stored previous year’s, previous month’s, or tariff value.
A calibrated value (quantity of heat or volume) is marked by the star symbol.
An unset calibration seal is indicated by permanent display of three arrows. In this case, its
display function is inverted, i.e. the relevant segment blinks when a previous year’s, previous
month’s, or tariff value is displayed.
The number of digits after the decimal point
of a value (e.g. the quantity of heat) depends
on the chosen measuring path and the
chosen dimension.
The digits after the decimal point are always
shown with a border.
For values requiring calibration, display of the
digits after the decimal point can be para-
meterized (blinking, static or suppressed).
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 displays are distributed among various loops (“LOOP”). The displays are called sequentially
using the operating elements (LCD buttons) on the front.
Up to 8 loops can be parameterized using PappaWin.
Display 01
Display 02
Display 03
Display 04
...
...
Display 0y
Display 11
Display 12
Display 13
Display 14
...
...
Display 1y
Display x1
Display x2
Display x3
Display x4
...
...
Display xy
LOOP 0 LOOP 1 LOOP x
.....
d
c
e
User loop
11.10.2006 / UH50_en.vsd / Display
"Button lock"
parameterizable
"Service loop lock"
parameterizable
Service loops
LCD button 2 is used to move line by line through the current loop (c). After the last line, the
first line is displayed again. LCD button 1 (“Loop”) calls the first line of the next loop up (d).
After the last loop, the first loop is shown again (e).
The user loop (LOOP 0) contains the consumption values. The service loops (LOOP 1...LOOP
x) may contain further values.
After 30 seconds of inactivity – within the user loop - the display returns to the default display.
The default display can be parameterized and is optionally the error display or any display line
of the basic loop (LOOP 0) (“Standard display”).
Return to the default display from the service loop occurs automatically after 30 minutes of
inactivity.
Any display line can be called directly by telegram via the assigned (internal) code number.
“Calibrated value”
“Prev. years’s value” “Prev. month’s value” “Tariff value”
L

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Further parameterization options:
1. “Button lock”
Advancing the display using the LCD buttons can be blocked or enabled by telegram.
When locked, operating the LCD buttons has not effect.
2. “Service loop lock”
Calling the service loops (LOOP 1...LOOP x) can be blocked or enabled by telegram. If
the service loop is locked, operating LCD button 1 has no effect.
3. “Display lock” (also known as start-up lock or NEOVAC lock)
The unit display can be locked or enabled completely by telegram. If the display is
locked, the figure “8” and all decimal points blink.
Note: In this state, it is no longer possible to see whether the calibration seal is set!
Display locked (blinking)
4. “Power saving mode”
Power saving mode can be locked or enabled (default) by telegram.
If power saving mode is enabled – and the calibration seal is set – switchover to power
saving mode is performed after 15 minutes if no button is pressed (and no data traffic
takes place).
If power saving mode is locked, the LCD display is permanently active.
The locking functions 1 to 4 above can be combined.
Behavior Button lock Service lock Display lock Power
saving
mode
Full LCD access no no no no
Full LCD access, but LCD
inactive after 15 minutes
no no no yes
Only “display locked” no no yes no
no no yes yes
Only user loop possible no yes no no
no yes no yes
no yes yes no
no yes yes yes
Only PRIO display yes no no no
yes no no yes
yes no yes no
yes no yes yes
yes yes no no
yes yes no yes
yes yes yes no
yes yes yes yes
Error as
priority
Any display
PRIO
display
EB / Pb
inactive "Display
locked"
LOOP n
Any display
Power saving mode:
Display:
Service loop:
LCD button:
Button or
telegram
30 min
LCD button 1
LCD button 1
LCD button 1
30s + "Error no longer"
30s + "Error new"
LCD
button 2
LCD
button 2
30s
30s
5s
0,5s
Display lock
Error
No error
LCD
button 2 LCD
button 2
LCD
button
2
15min
LCD
button 1
n+1
LCD: Complete structure
Error as
priority
Any display
PRIO
display
EB / Pb
inactive "Display
locked"
LOOP n
Any display
Power saving mode:
Display:
Service loop:
LCD button:
Button or
telegram
30 min
LCD button 1
LCD button 1
LCD button 1
30s + "Error no longer"
30s + "Error new"
LCD
button 2
LCD
button 2
30s
30s
5s
0,5s
Display lock
Error
No error
LCD
button 2 LCD
button 2
LCD
button
2
15min
LCD
button 1
n+1
not activated
enabled
enabled
enabled
LCD: Standard configuration

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Error as
priority
Any display
PRIO
display
EB / Pb
inactive "Display
locked"
LOOP n
Any display
Power saving mode:
Display:
Service loop:
LCD button:
Button or
telegram
30 min
LCD button 1
LCD button 1
LCD button 1
30s + "Error no longer"
30s + "Error new"
LCD
button 2
LCD
button 2
30s
30s
5s
0,5s
Display lock
Error
No error
LCD
button 2 LCD
button 2
LCD
button
2
15min
LCD
button 1
n+1
not activated
enabled
enabled
locked
LCD: Button function locked
Error as
priority
Any display
PRIO
display
EB / Pb
inactive "Display
locked"
LOOP n
Any display
Power saving mode:
Display:
Service loop:
LCD button:
Button or
telegram
30 min
LCD button 1
LCD button 1
LCD button 1
30s + "Error no longer"
30s + "Error new"
LCD
button 2
LCD
button 2
30s
30s
5s
0,5s
Display lock
Error
No error
LCD
button 2 LCD
button 2
LCD
button
2
15min
LCD
button 1
n+1
not activated
enabled
locked
enabled
LCD: Access to service loops locked
Error as
priority
Any display
PRIO
display
EB / Pb
inactive "Display
locked"
LOOP n
Any display
Power saving mode:
Display:
Service loop:
LCD button:
Button or
telegram
30 min
LCD button 1
LCD button 1
LCD button 1
30s + "Error no longer"
30s + "Error new"
LCD
button 2
LCD
button 2
30s
30s
5s
0,5s
Display lock
Error
No error
LCD
button 2 LCD
button 2
LCD
button
2
15min
LCD
button 1
n+1
not activated
locked
enabled
enabled
LCD: Display locked completely
Error as
priority
Any display
PRIO
display
EB / Pb
inactive "Display
locked"
LOOP n
Any display
Power saving mode:
Display:
Service loop:
LCD button:
Button or
telegram
30 min
LCD button 1
LCD button 1
LCD button 1
30s + "Error no longer"
30s + "Error new"
LCD
button 2
LCD
button 2
30s
30s
5s
0,5s
Display lock
Error
No error
LCD
button 2 LCD
button 2
LCD
button
2
15min
LCD
button 1
n+1
activated
enabled
enabled
enabled
LCD: Power saving mode activated
Display loops (only examples, as described in the Operating Instructions, the Configuration
Instructions, and the Installation and Service Instructions)
User loop (“LOOP 0”)
Head of the loop
Accumulated quantity of heat with tariff status (3)
Tariff register 1 (optional) (32)
Accumulated volume (4)
Segment test (7)
Error message with error code number (1)
Service loop 1 (“LOOP 1”)
Head of the loop
Current flowrate (8)
Current heat power (10)
Current flow/return temperature (9)
Operating time (6)
in hours or days
Operating time with flowrate (95)
in hours or days
Missing time (13)
in hours or days
Property number, 8-digit (27)
Date (23)
Yearly set day (TT.MM) (14)
Quantity of heat previous year on set day (15)
Volume previous year on set day (16)
Firmware version (30)

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Service loop 2 (“LOOP 2”)
Head of the loop
Max. flowrate,
at 2s intervals with date stamp (37)
Max. power,
at 2s intervals with date stamp (38)
Max. temperatures,
at 2s intervals with date stamp (39)
for flow and return maximum
Measuring period for maximum calculation (24)
Service loop 3 (“LOOP 3”)
Head of the loop
Set day for December 2005 (35)
Set day for November 2005 (--)
... ...
Set day for July 2004 (--)
using LCD button 2:
Quantity of heat on the set day (36)
Tariff register 1 on the set day (69)
Volume on the set day (64)
Max. flowrate on the set day,
at 2s intervals with date stamp (66)
Max. heat power on the set day,
at 2s intervals with date stamp (67)
Max. temperatures on the set day,
at 2s intervals with date stamp (46)
for flow and return maximum
Missing time count on the set day (65)
These lines repeat for all earlier months.
LCD button 1 (LOOP) can be used to jump directly to the next month back.
Service loop 4 (“LOOP 4”)
Head of the loop
Current tariff,
at 2s intervals with threshold value 1 (68)
Measuring interval for flowrate (98)
Measuring interval for temperature (33)
Module 1 not fitted (29)
Module 1: Analog module
Module 1: CL module
Module 1: M-bus module
M-bus primary address 1 *) (21)
M-bus secondary address 8-digit *) (22)
Modul1: Multi module
Modul1: Pulse module; channel 1 = tariff register 2 **)
Modul1: Pulse module; channel 1 = quantity of heat **)
Module 1:Pulse module; channel 2 = tariff register 1 **)
Module 1: Pulse module; channel 2 = volume **)
Module 1: Pulse module; channel 2 = status display **)
Module 2: not fitted (92)
Module 2: Analog module
Module 2: CL module
Module 2: M-bus module

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M-bus primary address 2 *) (96)
Module 2: Multi module
Module 2: Pulse module; channel 1 = tariff register 2 **)
Module 2: Pulse module; channel 1 = quantity of heat **)
Module 2: Pulse module; channel 2 = tariff register 1 **)
Module 2: Pulse module; channel 2 = volume **)
Module 2: Pulse module; channel 2 = status display **)
Pulse significance quantity of heat(80)
Pulse significance volume (81)
Pulse duration “fast pulses” (82)
*) only displayed for the M-bus module
**) only displayed for the pulse module
Logbook
The logbook is intended to record the history of the UH50. Its content is permanently stored on
EEPROM and can only be deleted by initializing the EEPROM (only possible in the factory, not
by the customers or external testing facilities)
The event memory stores the data of the last events (with time stamp) in chronological order.
The monthly memory (implemented as a circulating buffer) stores the events of the last 18
months.
Only internal: Updating is performed on each full minute and transfer into the EEPROM on each
detected change.
The previous month’s values are held in the RAM and are transferred into the EEPROM on the
next full hour.
The events recorded are predefined and are logged with the time when they occurred.
Types of events:
−Errors
−Events (states or actions)
Types of events:
−Occurrence/back-to-normal (“KG”);
a change of state is recorded (14 different events)
−Occurrence/acknowledgment (“KQ”);
the occurrence of an action is recorded (10 different events)
List of predefined events
Event type Event type
Ser.
No. Error State or
action K-G K-Q Description
1 x x F0 = Air in the measuring tube
2 x x F1 = Open-circuit flow sensor
3 x x F2 = Open-circuit return sensor
4 x x F3 = Error in the temperature electronics
5 x x F5 = Short-circuit flow sensor
6 x x F6 = Short-circuit return sensor
7 x x F8 = Sensor error > 8 hours
8 x x F9 = ASIC errors
9 x x Above max. temperature in the volume measuring unit
10 x x Under min. temperature in the volume measuring unit
11 x x Max. flowrate qs exceeded
12 x x Contamination warning
13 x x Primary voltage off
14 x x CRC error has occurred
15 x x Adjustment values parameterized
16 x x F7 (EEPROM) pre-warning
17 x x Cold start / warm start (with reset) performed
18 x x Date and/or time parameterized
19 x x Yearly set day parameterized
20 x x Monthly set day parameterized

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Landis+Gyr GmbH Glossary UH606-101b Page 13 of 38
List of predefined events
Event type Event type
Ser.
No. Error State or
action K-G K-Q Description
21 x x Master reset performed
22 x x Operating time + missing time + unit run time reset
23 x x Missing time reset
24 x x Maxima reset
Event memory
To be able to trace the history of each event, its last 4 times are stored in a separate shift
register. When a further event is stored, the oldest event is moved out of the shift register and
transferred into a 25-step circulating buffer.
The circulating buffer contains the “overflows” of all shift registers and provides a certain amount
of information about the events. When a new value is placed in the circulating buffer, the oldest
entry is lost.
...........
Event #1
Event #2
Event #24
...........
1. 2. 3. 4. 25.24.
25-step circulating buffer
4-step shift register
Time n Time n-1 Time n-2 Time n-3
Oldest entry
Maxima are the stored maximum values for heat power, flowrate, flow temperature, and return
temperature. The associated time stamp contains the date of occurrence. The measuring
period for calculation of the maximum can be parameterized in the range 7.5 minutes to 24
hours in defined steps.
The lifetime maxima are the maximum values during the overall operating time of the UH50
and can reset by telegram.
The yearly maxima are a copy of the lifetime maxima on the yearly set day.
The monthly maxima are the real maxima in the month in question.
The measuring interval for the flowrate and
temperature can be parameterized. Different
values can be defined for line and battery
operation.
The measuring period for calculation of the maxima can be parameterized in the range 7.5
min – 15 min – 30 min – 60 min – 3 h – 6 h – 12 h – 24 h.
The associated information is displayed in LOOP 1.
M

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Landis+Gyr GmbH Glossary UH606-101b Page 14 of 38
Modes
Nb+
Nb-
Pb+
Pb
Eb
Qb
Normal mode, with calibration seal
Normal mode, without calibration seal
Parameter setting menu (with buttons)
Test mode (by telegram or with buttons)
Calibration mode (by telegram or “pads”)
Test mode (manufacturer-internal)
Nb+ Nb-
Eb
Qb
Pb+ Pb
Calibration
seal is set
Calibration seal is
not set
Normal
mode
Service
mode
Calibration
mode
Pb+ Pb
The UH50 can optionally be fitted with up to two pluggable modules.
The module interfaces are processed – like the optical interface – in each one-second pass in a
defined order. Each communication requires a certain time budget that impairs overall
availability. That means that during communication with an interface, the other communication
paths are temporarily not available and cannot be operated for a lengthy period.
If the sum of the communication times for the interfaces is greater than the measurement
timebase, the missing measurements are corrected on the next measurement. An excessive
number of missing measurements can result in the interfaces being blocked, which can have
effects on the external response of the modules.
In the case of very short measurement timebases and frequent communication, the exception
described can become the rule. A nominal measurement timebase of 500 ms then, for example,
results in an only 2-second measurement timebase.
Permissible combinations for placement in heat meter:
Slot for module #2 is fitted with...
Pulse module
Analog
module Standard
pulses
Fast pulses
*)
M-bus Current
Loop Radio
Analog module yes yes yes yes (4) yes yes
Standard pulses yes yes (3) yes (2) yes (4) yes yes
Pulse
module Fast pulses no no no no no no
M-bus yes yes yes yes (4) yes (1) yes
Current loop yes yes yes yes (1) no (5) yes
Slot for module #1
can be fitted with ...
Radio module no no no no no no
Restrictions:
*) Only 1 module with fast pulses possible, only permissible on slot 2;
min. pulse duration = 2 ms, if no pulse module is fitted in slot 1
min. pulse duration = 5 ms, if a further pulse module is fitted in slot 1
(1) In the case of an M-bus with a controller link, 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
(5) Because of response time 30..40s, too long for 2 modules
**) Subsequently plugging a second pulse module into slot 1, can change the set
pulse duration for module 2!
The analog module converts a selectable
measured value of the heat meter into an
analog
output signal (channel 1, channel 2). Analog module
Outputsignal:
Channel1,
Channel2

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Landis+Gyr GmbH Glossary UH606-101b Page 15 of 38
The following can be selected as measured
values:
-Heat power
-Flowrate
-Flow temperature
-Return temperature
-Temperature difference
The following can be selected for 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
mode.
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.
The pulse module permits the output of pulses (“tariff
pulses”) that can be derived from the quantity of heat, the
volume, tariff register 1, tariff register 2, or the mode. 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.
Pulse module
Pulse output:
Channel 1,
Channel 2
Note: If two pulse modules are plugged, please note the restrictions!
Parameter setting for standard pulses
Output mode Output value
CE
(count energy) Pulses for quantity of heat
Channel 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 modes "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
Output connection “standard”:

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Landis+Gyr GmbH Glossary UH606-101b Page 16 of 38
A special version of the pulse module (“Deluxe”) is available with an Opto-MOS output.
Application example: Battery-powered pulse receiver.
Advantages: Low voltage drop and polarized (bipolar).
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
With the M-bus module, several heat meters
can be read from a central station.
The data frame can be defined with a jumper.
Jumper in pos. 1 “Fixed data frame”
Jumper in pos. 2 “Guaranteed data frame”
Jumper in “center” “Variable data frame”
M-bus module
Pos. 2 Pos. 1
Jumper
M-Bus
Note: If two M-bus modules are plugged, please note the restrictions!
Display on LCD MB (meter bus)
Standard per EN 1434-3
Isolation galvanic
Connection with galvanic isolation
Voltage 50 V maximum
Current consum. 1.0 M-bus loads (1.5 mA)
Addressing primary or secondary
Transmission rate 300/1200/2400/4800 baud
Literature TKB 3417
Read-out freq. any number of time, 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 the data
and time, and setting the primary and secondary address.
Data scope for 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 for power and missing time; previous year’s
values for quantity of heat, volume and maximum for power ; measuring period with maxima for
power, flowrate and temperatures; actual values for power, flowrate and temperatures; F0
prewarning; setting and resetting a user lock; setting the date and time, and setting 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 read-out:
- 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.
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 on LCD CL (current loop)
Standard per EN 1434-3
Type passive current loop
CL module
RTX+,
RTX-

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Landis+Gyr GmbH Glossary UH606-101b Page 17 of 38
Baudrate 2400 baud, fixed
Isolation galvanic
Polarity yes
Voltage 30 V maximum
Current 30 mA maximum
Voltage drop < 2 V at 20 mA
Literature TKB 3415
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 for power; fault duration and 18 monthly
values for quantity of heat, tariff register, volume, missing time, maximum for power, flowrate
maximum, measuring period with maxima for power, flowrate and temperatures; actual values
for power, flowrate and temperatures.
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 mode.
Radio module;
with internal or
external antenna
Pulse inputs:
Channel 1,
Channel 2
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 freq. 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 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.

Glossary UH50 – FOR INTERNAL USE ONLY!
Landis+Gyr GmbH Glossary UH606-101b Page 18 of 38
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
The external multi module is delivered without adapter plate and without power adapter. The
adapter plate and the power adapter must be ordered separately.
The 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 of the Multimodule
Module #2
e.g. M-bus module
*)
Module #1
e.g. radio module
*)
Module #3
e.g. analog
module
*)
Multi-
module
Pulse output
Buttons
Coding switches
LEDs M-bus
10V / 20 mA
M-bus
Power supply
radio
*) the combination of modules
shown is only an example
Pulses for energy
Pulses for volume
Pulses for operating status
Pulses for tariff 1
Pulse input #1
Pulse input #2
Adapter plate
in heat 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 3 buttons and 2 coding switches.
The mode is displayed on LEDs, further LEDs indicate the status of the output pulses.
For further details and a separate description, see “WZX-MM Installation and Service
Instructions”.

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Landis+Gyr GmbH Glossary UH606-101b Page 19 of 38
Monthly memory
Monthly memory contains the history of the events for the last 18 months. The monthly memory
is implemented as a shift register. The current monthly data is transferred on the parameterized
monthly set day. The data for the oldest previous month are then lost.
The data in the monthly memory are stored without a time stamp. The memory only indicates
whether an error occurred in the month in question or a certain event occurred. No information
is given, for example, about the duration of the error condition.
NEOVAC lock see Display lock
In normal mode, flowrate measurement and temperature measurement are performed in a
timebase (measuring interval) of 4 seconds (parameterizable: 0.5 / 1 / 2 / 4 or 8 seconds) or
30 seconds (parameterizable: 2 / 4 / 8 / 30 / 60 seconds).
If power saving mode (“saving mode”) has been parameterized – and the calibration seal is set
– the LCD is only activated once every 5 seconds for approx. 0.5 seconds after 15 minutes of
inactivity (no LCD button is pressed and no data traffic). This mode is exited when an LCD
button is pressed and the LCD then permanently displays. After another 15 minutes of inactivity
(no LCD button pressed and no data traffic through the optical interface), the LCD again
switches to “power saving mode”.
Caution: If the service button is pressed in this state, display mode remains!
The following notes have been included in the instructions:
Text CI I / SI OI
•The electronic unit must only be cleaned on the outside. Please use a
soft, damp cloth to do this, which can be dipped in a non-corrosive
cleaning agent.
- - yes
•Regulations on the use of heat meters must be observed, see EN 1434,
Part 6! In particular, cavitation in the system must be avoided.
yes yes -
•Heat meters up to DN25 may only be installed with directly immersed
sensors according to German calibration law!
yes yes -
•Install the unit in such a way that no water can enter the electronic unit
during operation.
yes yes -
•All information given on the data sheet of the heat meter must be
observed.
yes yes -
•User seals may only be removed by authorized persons for service
purposes and must be replaced afterwards.
yes yes yes
•The unit is supplied with Installation and Service Instructions and with
Operating Instructions.
yes - -
•No later than 30 seconds after installation, the heat meter detects the
plugged modules automatically and is ready for communication or pulse
output.
yes yes -
•The type of modules plugged can be displayed in the service loop
depending on how the display is parameterized.
yes yes -
•For fast pulses, the parameters must be set accordingly with the
PappaWin software.
yes yes -
•Up-to-date versions of all instructions can be found in the Internet at
www.landisgyr.com
yes yes yes
N

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Landis+Gyr GmbH Glossary UH606-101b Page 20 of 38
Operating elements:
Outside:
−LCD button 1 (“loop”);
switches to the first line of the next loop
−LCD button 2;
switches to the next line within a loop
Inside:
−Service button
−Calibration button“ (operated with a
service tool, not supplied)
The service button and the calibration button
are only accessible after the housing cover
has been removed.
The calibration button is additionally
protected by an adhesive label.
The optical interface permits data traffic with
the associated software, e.g. PappaWin.
Operating time see Timer
Operating time with flowrate see Flowrate measuring time or Timer
An optical interface permits data exchange via telegrams:
−Mandatory telegram
−Optional telegram
−Eb (calibration mode) telegram
−Parameter setting telegram
The data (actual values, consumption values, stored values, and parameters) can be read out in
groups as mandatory, optional, or Eb (calibration mode) telegrams. The UH50 is configured via
the parameterization telegrams.
Mandatory telegram Optional telegram Eb telegram
Unit number; property number;
measuring range;
system date/system time,
current fault display;
current values for W, V, TDiff, TV, TR and fault duration;
previous year’s values for W, V, TDiff, TV, TR and fault duration;
set day;
operating time,
measuring period;
(lifetime) maxima for Q, TDiff, TV, TR, P;
parameter setting (mounting location, TR simulation);
tariff parameters;
time stamp
Stored monthly values for W, V;
(monthly) maxima;
adjustment values; measuring path
parameters;
T sensor parameters;
detailed fault data;
actual values for Q, TDiff, TV, TR, P;
prescaler for W, V and TR1/2/3;
parameters for “fast pulses”
All parameter values;
Measurement results of a
preceding test mode;
current normal mode meter
readings with all prescalers
(for shortened
certification/test times);
tariffs
O