Landis+Gyr T450 User manual

Static Heat and Cooling Meter T450
Residential; local and district heating
ULTRAHEAT®T450
ULTRACOLD®T450
Service manual
32 21 101 004 a
Date: 22.04.2020
© Landis+Gyr GmbH

2/25 Contents
© Landis+Gyr
Contents
Contents................................................................................................................................................ 2
1General notes ................................................................................................................................4
1.1 Other available documentation..................................................................................................4
1.2 Safety information......................................................................................................................5
2Operating elements.......................................................................................................................7
3Parameterization ...........................................................................................................................7
3.1 Calling the parameterization function ........................................................................................7
3.2 Setting of parameters ................................................................................................................7
4Adjustable parameters .................................................................................................................8
4.1 Delete error F8 ..........................................................................................................................9
4.2 Delete maxima, minima and average values.............................................................................9
4.3 Delete error- and volume measurement time..........................................................................10
4.4 Enter yearly set date................................................................................................................10
4.5 Enter monthly set date.............................................................................................................10
4.6 Enter mid-month set date ........................................................................................................10
4.7 Switch time of set date ............................................................................................................11
4.8 Enter date................................................................................................................................11
4.9 Enter time ................................................................................................................................11
4.10 Enter property number.............................................................................................................12
4.11 Enter M-Bus secondary address .............................................................................................12
4.12 Enter M-Bus primary address..................................................................................................12
4.13 Test communication function...................................................................................................13
4.14 Switch radio module on / off ....................................................................................................13
4.15 Switch unit of heat quantity......................................................................................................14
4.16 Change the installation location of the volume measuring part...............................................14
4.17 Switch temperature sensor Pt100 to Pt500.............................................................................15
4.18 Switch to normal operation......................................................................................................15
5Torques........................................................................................................................................15
6Power supply...............................................................................................................................15
6.1 Changing the battery ...............................................................................................................15
6.2 Dynamical calculation of battery life ........................................................................................16
7Communication module .............................................................................................................16
7.1 Connection terminals...............................................................................................................17
7.2 Pulse output module................................................................................................................18
7.2.1 Installing the communication..............................................................................................18
7.2.2 Testing of the module.........................................................................................................19
7.3 M-Bus module .........................................................................................................................19
7.3.1 Installing the communication..............................................................................................19
7.4 Radio-module 868 MHz (Wireless M-Bus) ..............................................................................20
7.4.1 Installing the communication..............................................................................................20
7.4.2 Start transmission mode ....................................................................................................20
7.4.3 Start transmission mode using LOOP 2.............................................................................21
7.4.4 Start/stop transmission mode using parameterization mode .............................................21
7.4.5 Testing of the module.........................................................................................................21
8Pulse inputs.................................................................................................................................21
8.1 Connection of pulse inputs ......................................................................................................21
8.2 Activation of pulse inputs.........................................................................................................22
9Replacement of detachable temperature sensors...................................................................22

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10 Firmware update.........................................................................................................................23
10.1 System requirements..............................................................................................................23
10.2 Perform firmware update ........................................................................................................23
10.3 Checking the actualized firmware version ..............................................................................24
11 Service software UltraAssist.....................................................................................................24

4/25 General notes
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1 General notes
Note: In the following text, the term "meter" is used to refer to
both the heating meter as well as the cooling meter unless
otherwise stated.
The meter has left the factory in a technically safe condition. Only
personnel, trained in the installation and operation of meters in heating and
cooling systems, may execute any kind of manual work relevant for the
device, like the adjustment, maintenance or replacement of single
components part of the meter. Further technical support is provided by the
manufacturer on request. The meter's calibration-relevant security symbols
must not be damaged or removed. Otherwise, the warranty and calibration
validity of the meter will be invalidated.
1.1 Other available documentation
•Operating instructions T450
•Installation instructions T450
•Technical description T450
•Respective module manual
•List of accessories
Additional information is available on request.

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1.2 Safety information
The following safety regulations must always be observed:
The meters may only be used in building installations and only for
the applications described.
The local regulations (installation, etc.) must be observed.
The operating conditions on the nameplate must be observed
during use. Failure to comply with these regulations can cause
dangerous situations and voids all claims arising from liability for
defects as well as liability based on any expressly granted
guarantees.
Comply with the requirements for circulation water (CEN / TR
16911:2016).
The meter is only suitable for circulation water in heating systems.
The meter is not suitable for drinking water.
Do not lift the meter on the calculator.
Pay attention to sharp edges on threads, flanges and the
measuring tube.
Only personnel trained in the installation and operation of meters in
heating/cooling systems may install and remove the meter.
Only install or remove the meter on an unpressurised system.
After installing the meter, check the leak tightness of the system.
Breaking the safety marks relevant for calibration voids the
warranty and the validity of the calibration.
Avoid contact of the meter housing with silicone oils or substances
containing silicone oil.
Only clean the meter from the outside with a soft, slightly
moistened cloth. Do not use spirits or cleaning agents.
The meter must not be energized until it has been fully assembled.
Otherwise there is a risk of electric shock on the terminals. A
defective or obviously damaged device must be disconnected from
the power supply immediately and replaced.
The meter is valid for disposal as waste electronic equipment
within the meaning of the European Directive 2012/19/EU (WEEE)
and must not be disposed of as household waste. The
corresponding national and legal regulations must be observed,
and the device must be disposed of via the channels provided for
this purpose. The local and currently valid legislation must be
observed.
The meter contains lithium batteries. Do not dispose of the meter
and batteries as household waste. Observe local regulations and
laws regarding disposal.
After lithium batteries have been used, you can return them to the
manufacturer for proper disposal. When shipping batteries please

6/25 General notes
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observe legal regulations which among other things govern the
labelling and packaging of hazardous goods.
Do not open the batteries. Do not bring batteries into contact with
water or expose to temperatures exceeding 80 °C.
The meter has no lightning protection. Ensure lightning protection
via the house installation.

Operating elements 7/25
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2 Operating elements
Fig. 1: Operating elements
No.
Name
Description
Note
1
Button 1
Switches to the next display
value within a loop.
2
Button 2
Switches to the next loop.
3
Security seal
4
Screw
5
Optical interface
Permits data communication
via a computer with the
necessary service software.
6
LCD
7
Service button
To call up the
parametrization operation of
the meter.
Accessible after
removing the cover.
3 Parameterization
Note: The parameterization of the meter may have an impact on
the battery life.
Note: Alternatively, the meter can be parameterized in the
parametrization mode via the optical interface using UltraAssist.
3.1 Calling the parameterization function
Proceed as follows to parameterize the meter:
•Press the service button for 3 seconds until the LCD displays
.
•Press button 2 to adjust the parametrization.
3.2 Setting of parameters
To select a parameter, proceed as follows:
•Press button 1 to advance the display.
•Press button 2 to activate the parameter to be changed.

8/25 Adjustable parameters
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4 Adjustable parameters
Note: The functions of the module can also be parameterized
without an installed module.
The following parameters of the meter can be set:
LCD display
Description
Notes
Delete error F8
Delete maxima, minima and
average values
Delete error- and volume
measurement time
Enter yearly set date (DD, MM)
Enter options:
day 01-31; month 01-
12
Enter monthly set date (DD)
Enter options:
day 01-31
Enter mid-month set date (DD)
Enter options:
day 01-31
Switch time of set date
Options:
24 (end of day);
00 (start of day)
Enter date
(DD, MM, JJ)
Entry options:
day 01-31; month 01-
12; year 00-99
Enter time
(hh, mm, ss)
Entry options:
Hour 00-23;
Minute 00-59;
Second 00-59
Enter property number
Entry options:
per digit 0-9
Enter M-Bus secondary
address
Entry options:
per digit 0-9
Enter M-Bus primary address
Entry options:
000-250
Test communication function
Switch radio module on / off
Switch unit of heat quantity
Only displayed when
activated in the
factory.
Change the installation location
of the volume measuring part
Only displayed when
activated in the
factory.

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Switch temperature sensor
Pt100 to Pt500
Only displayed when
activated in the factory.
Switch to normal operation
4.1 Delete error F8
4.2 Delete maxima, minima and average values

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4.3 Delete error- and volume measurement time
4.4 Enter yearly set date
To enter the yearly set date, proceed as follows:
1. Press button 1 repeatedly until the LCD displays .
2. Press button 2 repeatedly until the digit to be modified begins to flash.
3. Press button 1 repeatedly until the required value is being displayed on
the LCD.
Step 2and 3can be optionally repeated as often as needed until the
required value is being indicated.
4. Press button 1 to finally confirm the entered value. Please note that no
digit may flash any more.
4.5 Enter monthly set date
To enter the monthly set date, proceed as follows:
1. Press button 1 repeatedly until the LCD displays .
2. Press button 2 repeatedly until the digit to be modified begins to flash.
3. Press button 1 repeatedly until the required value is being displayed on
the LCD.
Step 2and 3can be optionally repeated as often as needed until the
required value is being indicated.
4. Press button 1 to finally confirm the entered value. Please note that no
digit may flash any more.
4.6 Enter mid-month set date
To enter the mid-month set date, proceed as follows:
1. Press button 1 repeatedly until the LCD displays .
2. Press button 2 repeatedly until the digit to be modified begins to flash.

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3. Press button 1 repeatedly until the required value is being displayed on
the LCD.
Step 2and 3can be optionally repeated as often as needed until the
required value is being indicated.
4. Press button 1 to finally confirm the entered value. Please note that no
digit may flash any more.
4.7 Switch time of set date
4.8 Enter date To enter the date, proceed as follows:
1. Press button 1 repeatedly until the LCD displays .
2. Press button 2 repeatedly until the digit to be modified begins to flash.
3. Press button 1 repeatedly until the required value is being displayed on
the LCD.
Step 2and 3can be optionally repeated as often as needed until the
required value is being indicated.
4. Press button 1 to finally confirm the entered value. Please note that no
digit may flash any more.
4.9 Enter time To enter the time, proceed as follows:
1. Press button 1 repeatedly until the LCD displays .
2. Press button 2 repeatedly until the digit to be modified begins to flash.
3. Press button 1 repeatedly until the required value is being displayed on
the LCD.
Step 2and 3can be optionally repeated as often as needed until the
required value is being indicated.

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4. Press button 1 to finally confirm the entered value. Please note that no
digit may flash any more.
4.10 Enter property number
To enter the property number, proceed as follows:
1. Press button 1 repeatedly until the LCD displays .
2. Press button 2 repeatedly until the digit to be modified begins to flash.
3. Press button 1 repeatedly until the required value is being displayed on
the LCD.
Step 2and 3can be optionally repeated as often as needed until the
required value is being indicated.
4. Press button 1 to finally confirm the entered value. Please note that no
digit may flash any more.
4.11 Enter M-Bus secondary address
To enter the M-Bus secondary address, proceed as follows:
1. Press button 1 repeatedly until the LCD displays .
2. Press button 2 repeatedly until the digit to be modified begins to flash.
3. Press button 1 repeatedly until the required value is being displayed on
the LCD.
You can repeat steps 2and 3as many times as you want until the required
value appears.
4. To confirm the entered value, press the button 1, making sure that no
more digits are flashing.
4.12 Enter M-Bus primary address
To enter the M-Bus primary address, proceed as follows:
1. Press button 1 repeatedly until the LCD displays .
2. Press button 2 repeatedly until the digit you want to modified flashes.
3. Press button 1 repeatedly until the required value is being displayed on
the LCD.
You can repeat steps 2and 3as many times as you want until the required
value appears.
4. To confirm the entered value, press the button 1, making sure that no
more digits are flashing.

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4.13 Test communication function
4.14 Switch radio module on / off

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4.15 Switch unit of heat quantity
4.16 Change the installation location of the volume measuring part
Note: If necessary, adjust the temperature sensors according to
the installation requirements.

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4.17 Switch temperature sensor Pt100 to Pt500
4.18 Switch to normal operation
To switch into normal operation, proceed as follows:
•Press button 1 repeatedly until the LCD displays .
•To switch into normal operation switch button 2.
5 Torques Please note the following torques for tightening the screws and nuts on the
meter:
•Screw on the device cover (Fig. 1, No. 4): min. 1 Nm
•All other screws: Hand-tightened to approx. 0.5 Nm
6 Power supply
Caution: Do not open the batteries. Do not bring batteries into
contact with water or expose to temperatures exceeding 80 °C.
Dispose of used batteries at suitable collection points.
6.1 Changing the battery
Note: When replacing the battery, ensure that the battery service
life is longer than the planned life cycle of the meter.
Note: Only batteries approved by the manufacturer may be
installed.
Note: After lithium batteries have been used, you can return them
to the manufacturer for proper disposal. When shipping batteries
please observe legal regulations which among other things govern
the labelling and packaging of hazardous goods.

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Number
Description
1
User lock
2
Screw
3
Battery compartment cover
4
Seal
5
Battery
Fig. 2: Battery compartment
To change the battery, proceed as follows:
•If necessary, open the battery compartment cover by loosening the
screw.
•Remove the old batteries from the battery compartment.
•Insert the battery into the battery compartment according to the polarity
mark. Observe the connection sequence. Always start with the labelled
battery position 1.
•Close the battery cover by tightening the screw.
•If necessary, attach a user lock to the battery cover.
•Set the number of new batteries via UltraAssist.
6.2 Dynamical calculation of battery life
Note: Note that after changing the batteries, the number of
batteries must be parameterized via UltraAssist. This ensures that
the meter can calculate the battery life correctly.
7 Communication module
Note: Observe the required ESD protection measures when
installing modules.

Communication module 17/25
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Fig. 3: Module slot
Fig. 4: Grommets
7.1 Connection terminals
2-pole or 4-pole terminals are used for connection of the external cables to
the modules.
•Stripping length 6 mm
•Connection capacity
▪rigid or flexible, 0.14 … 1.5 mm²
▪flexible with wire and ferrule with plastic sleeve, 0.25 … 1.5 mm²
▪flexible with wire end ferrule without plastic sleeve, 0.25 … 1.0 mm²
▪conductor sizes 26 … 14 AWG
•Recommended screwdriver:
▪0.6 × 3.5 mm
•Tightening torque: 0.35 …0.4 Nm

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7.2 Pulse output module
Note: The output mode as well as standard or high-resolution
pulses can be parameterized via UltraAssist.
Note: The connections on the pulse output module are protected
against polarity reversal.
Fig. 5: Pulse output module
On channel 1 (terminal 16, 17):
•energy (CE)
•volume (CV) or
•tariff register 1 (C1)
pulses can be output.
On channel 2 (terminal 18, 19):
•volume (CV)
•tariff register 1 (C1) or
•tariff register 2 (C2)
pulses can be output.
The pulse duration is identical on both channels.
Standard pulses are set to
•100 ms pulse duration and
•1 kWh / 1 MJ or 10 l.
High-definition pulses are set to
•10 ms pulse duration and
•0.1 kWh / 0.1 MJ or 1 l.
7.2.1 Installing the communication
Proceed as follows to install a communication module:
•If necessary, open the housing cover by loosening the screw.
•Run the cable from the outside through the grommet.
•Strip and connect the cable.
•Secure the cable with the strain relief clamp.
•Connect the cable to the module’s terminals.
•Pull the cables out through the housing while inserting the module.
•First attach the contact surfaces of the module to the module slot.

Communication module 19/25
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•Gently push the module in.
•Close the housing cover by tightening the screw (see chapter Torques)
and press the housing cover tightly into place.
Depending on the design of the housing, please also observe the following
points:
•For IP 68 versions of the housing, tighten the cable gland.
•For the IP54 version of the housing, make sure that the grommet is
seated correctly.
Note: Please find the technical details and technical data of the
communication modules in their documentation.
Note: No later than 60 seconds after installation, the meter
automatically detects the inserted modules and is ready for
communication or pulse output.
7.2.2 Testing of the module
The function in the parameter setting mode of the meter
forces a pulse output on both channels.
Please find further information on the testing of the module in chapter 4.13.
Note: Each further pressing of button 2 causes a pulse forces a
pulse on both channels.
7.3 M-Bus module
Note:The telegram content of the readout can be
parameterized via UltraAssist.
The M-Bus module T45-MBUS enables the meter to communicate with a
M-Bus center in order to transmit measured values.
7.3.1 Installing the communication
Proceed as follows to install a communication module:
•If necessary, open the housing cover by loosening the screw.
•Run the cable from the outside through the grommet.
•Strip and connect the cable.
•Secure the cable with the strain relief clamp.
•Connect the cables to one of the terminals (24 and 25) of the module.
Another M-Bus meter can be connected to the free terminals (24 and
25).
•Pull the cables out through the housing while inserting the module.
•First attach the contact surfaces of the module to the module slot.
•Gently push the module in.
•Close the housing cover by tightening the screw (see chapter Torques)
and press the housing cover tightly into place.

20/25 Communication module
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Depending on the design of the housing, please also observe the following
points:
•For IP 68 versions of the housing, tighten the cable gland.
•For the IP54 version of the housing, make sure that the grommet is
seated correctly.
Note: Please find the technical details and technical data of the
communication modules in their documentation.
Note: No later than 60 seconds after installation, the meter
automatically detects the inserted modules and is ready for
communication.
7.4 Radio-module 868 MHz (Wireless M-Bus)
The wireless M-Bus function enables the meter to communicate with a
stationary unit or a mobile unit using 868 MHz radio frequency.
The module supports the OMS
1
-compliant data transfer including an
individual encryption function.
7.4.1 Installing the communication
The communication modules are connected via a non-reactive plug, so that
installation or modification is possible at any time.
Note: Touch the module only on its plastic holder.
Note: To connect an external cable, open the cable sleeves so that
they tightly enclose the cable.
Proceed as follows to install a communication module:
•If necessary, open the housing cover by loosening the screw.
•First attach the contact surfaces of the module to the module slot.
•Gently push the module in.
•Close the housing cover by tightening the screw (see chapter Torques)
and press the housing cover tightly into place.
Depending on the design of the housing, please also observe the following
points:
•For IP 68 versions of the housing, tighten the cable gland.
•For the IP54 version of the housing, make sure that the grommet is
seated correctly.
Note: Please find the technical details and technical data of the
communication modules in their documentation m.
Note: No later than 60 seconds after installation, the meter
automatically detects the inserted modules and is ready for
communication.
7.4.2 Start transmission mode
The following options are available to start the transmission mode:
1
Open Metering System