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Siemens 

Ultrasonic heat and cooling energy meters UH50.. 

CE2N5324en 

Building Technologies 

 

2013-01-14 

Application 

The UH50.. heat and cooling energy meter acquires energy consumption in a 
physically correct way. The device consists of flow measuring section and proces-
sor unit. The processor unit can be equipped with different sensors, different types 
of power supply and communication modules. The UH50.. is used to measure the 
consumption of heat in district heating systems and blocks of flats. It is also suited 
to measure the consumption of cooling energy (cooling energy only or in combina-
tion with thermal energy), or volume flow in hydronic systems. 

The UH50.. must not be used in connection with drinking water. 
Also, the product is not suited for use in systems operating on water-glycol mix-
tures. 
 

Functions 

The volume flow is acquired based on the ultrasonic measuring principle, free from 
wear, thanks to the use of non-moving parts. 

The quantity of energy supplied to the consumer by the medium during a certain 
period of time is proportional to the temperature differential of flow and return and 
the volume flow passing through the meter.  

The 

water volume

 is measured in the measuring tube by ultrasonic pulses which 

are transmitted in the direction of flow and against the direction of flow. Down-
stream, the time required by the pulses to travel from the transmitter to the receiver 
is reduced, upstream it is increased. The water volume is then calculated based on 
the values measured for the traveling times. 

The

 flow and return temperatures

 are determined using platinum resistors. 

The heating water volume and the temperature differential of flow and return are 
multiplied and its product integrated. The result, which is the consumed 

quantity of 

thermal or cooling energy

, is registered and displayed in the physical 

units

 

kWh/MWh or MJ/GJ, 

the volume in 

m

3

. 

 

A standard electronic unit is used for all flow rates with identical operation and an 
integrated service unit. 

The meter is equipped with an optical communication interface, enabling the de-
vice to be read and parameterized on site with the help of the WZR-OP-USB opti-
cal read head and the UltraAssist software. 

The meter performs constantly self-diagnostics, allowing it to detect a number of 
mounting or device errors and to display them. 
 

Type summary UH50.. 

The types of meters listed below are equipped as follows: 

Mounting location 

Return 

Rated pressure 

PN 16/PN 25 

Length of control cable 

1.5 m/3 m 

Sensor mounting 

Return temperature sensor, integrated in the  

 

flow measuring section 

 

Return temperature sensor, not integrated in  

 

the flow measuring section 

Restrictions 

Ultrasonic measuring 
principle 

Processor unit 

Optical communication 
interface 

Self-diagnostics 

Summary of Contents for S55561-F112

Page 1: ...ating or refrigerant circuits Non wearing due to non moving parts Approved in accordance with EN 1434 and MID class 2 Optional mounting position horizontal or vertical in return or flow Measuring range of flow 1 100 as per EN 1434 1 1 000 total range Choice of communication modules and power supplies No settling paths required Optical interface as per EN 62056 21 Self diagnostics ...

Page 2: ... and against the direction of flow Down stream the time required by the pulses to travel from the transmitter to the receiver is reduced upstream it is increased The water volume is then calculated based on the values measured for the traveling times The flow and return temperatures are determined using platinum resistors The heating water volume and the temperature differential of flow and return...

Page 3: ...minal flow rate mounting length 130 mm connecting thread G 1 PN 16 con trol cable length 1 5 m Pt500 DS M10x1 mm sensor length 27 5 mm cable length 1 5 m return sensor integrated in the flow measuring section energy unit kWh S55561 F114 UH50 A36 00 3 5 m 3 h nominal flow rate mounting length 260 mm connecting thread G 1 PN 16 control cable length 1 5 m Pt500 DS M10x1 mm sensor length 38 mm cable l...

Page 4: ...1 5 m3 h nominal flow rate mounting length 110 mm connecting thread G PN 16 con trol cable length 1 5 m Pt500 DS M10x1 mm sensor length 27 5 mm cable length 1 5 m return sensor integrated in the flow measuring section energy unit kWh S55561 F123 UH50 C21 00 2 5 m3 h nominal flow rate mounting length 130 mm connecting thread G 1 PN 16 con trol cable length 1 5 m Pt500 DS M10x1 mm sensor length 27 5...

Page 5: ...ng section energy unit MWh S55561 F131 UH50 C83 00 Other types available on request Component optional Stock number Product no Power pack AC 230 V cable length 1 5 m S55563 F111 WZU AC230 15 Power pack AC 230 V cable length 5 m LYU WZU AC230 50WZU AC230 50 Power pack AC 230 V cable length 10 m LYU WZU AC230 100 WZU AC230 100 Power pack AC DC 24 V with terminals standard battery for 6 years complet...

Page 6: ...irmware 5 17 NTA stan dard DSMR2 2 LYU WZU RF EXT WZU RF EXT GPRS module with external antenna magnetic attachment and with power pack AC 110 230 V LYU WZU GPRS WZU GPRS GPRS module with external antenna for screw mounting and with power pack AC 110 230 V LYU WZU GPRS ANT WZU GPRS ANT GSM module with 2 pulse inputs LYU WZU GM WZU GM Analog module LYU WZU AM WZU AM Power pack for analog module LYU ...

Page 7: ... consisting of 2 coupling nuts G 1 2 inserts R 1 2 gaskets S55563 F125 WZM E54 Mounting kit consisting of 2 coupling nuts G 2 2 inserts R 1 2 gaskets LYU WZM E2 1 WZM E2 1 Adapter from 110 mm to 130 mm consisting of 1 fitting G B to G B 2 gaskets LYU WZM V130 WZM V130 Adapter from 110 mm to 130 mm consisting of 1 fitting G B to G 1 B 2 gaskets G 2 gaskets G 1 LYU WZM V130 G1 WZM V130 G1 Adapter fr...

Page 8: ...p 60 m3 h LYU 9060944028 9060944028 Welding sleeve with threaded hole for temperature sensor DS M10x1 mm S55563 F121 WZT G10 Welding sleeve G 45 to pipe axis with threaded hole G S55563 F122 WZT G12 Welding sleeve G 90 to pipe axis with threaded hole G LYU WZT GLG WZT GLG Ball valve Rp for mounting the sensor DS M10 x 1 mm length 28 mm max water temperature 130 C PN 25 S55563 F104 WZT K12 Ball val...

Page 9: ...ded hole G for direct mounting of long sensors LYU WZT A100 WZT A100 Sealing disk for temperature sensor DS M10x1 mm Ø 8 6 5 3 size 1 mm LYU 9060944001 9060944001 Sealing disc made of copper LYU 9060948 9060948 Service key for calibration mode LYU 9089885 9089885 Mounting plate for top hat rail LYU WZU MH WZU MH Self lock seal with sealing wire LYU 9956186001 9956186001 Optical read head with USB ...

Page 10: ...uages Bulgarian Chinese Croatian Czech Dutch English French German Greek Hungarian Italian Norwegian Polish Russian Slovakian Slovenian Spanish and Turkish Technical design The diagram below shows the typical metering accuracy of the UH50 in compari son with the error limits as per to EN 1434 class 2 Key UH50 typical EN 1434 class 2 Order numbers Product no Stock number Description UH50 A36 00 S55...

Page 11: ...11 40 Siemens Ultrasonic heat and cooling energy meters UH50 CE2N5324en Building Technologies 2013 01 14 ...

Page 12: ...values are identified by a star symbol The number of decimal places of a value depends on the selected measuring path and the selected unit The meter s displays are arranged in 5 loops 1 user loop 4 service loops A short press on button 1 enables the required loop to be selected After the last loop the user loop reappears When pressing button 2 the values in the respective loop can be read After t...

Page 13: ... optional Accumulated volume Segment test Service loop LOOP 1 Current flow rate Current power Current flow return temperature at 2 second intervals Operating time Operating time with flow rate Missing time Property number 8 digits Date Yearly set day DD MM Energy previous year on set day Volume for previous year on set day Service loop LOOP 2 Measuring period for maximum calculation Service loop L...

Page 14: ...rong direction of flow Check flow or installation direc tion correct if necessary If necessary alternating with DIFF nEG Negative temperature differential Check place of installation of sensors replace if required If necessary alternating with F0 Flow cannot be measured Air in the measuring sec tion pipe vent the pipe as sup plied F1 Interruption in the flow tempera ture sensor Check sensor replac...

Page 15: ...ferent water temperatures to properly mix Before installing the meter the system must be thoroughly flushed Install the flow measuring section between 2 shutoff valves with the arrow pointing in the direction of flow The sensors must be mounted in the same water circuit as the flow measuring section observe mixing The cables must not be segregated shortened or extended Connect the individual wires...

Page 16: ...ansducer cover Permissible mounting position when metering cooling energy The ambient temperature of the processor unit must not exeed 55 C Avoid direct sunlight When fitting the unit ensure that water cannot enter during operation For water temperatures between 10 C and 90 C the processor unit may be left on the flow measuring section or can be fitted to the wall detached mounting For water tempe...

Page 17: ...ower pack Power pack AC DC 24 V WZU ACDC24 00 Power pack AC 230 V WZU AC230 15 WZU AC230 50 WZU AC230 100 Standard battery 2 AA WZU BA GUM Universal battery D cell WZU BDS The life of a battery depends on the type of battery and the requirements e g short timebase analog module etc Requirements with timebase Q 4 s and T 30 s Battery life 6 years 16 years Standard pulses M bus readout max every 15 ...

Page 18: ...le WZU MB WZU MB G4 M bus module with 2 pulse inputs WZU MI Analog module WZU AM RF module 433 MHz WZU RM WZU RM EXT RF module 868 MHz WZU RF WZU RF EXT GPRS module WZU GPRS WZU GPRS ANT GSM module WZU GM These modules have no impact on consumption metering and can therefore be replaced at any time without having to destroy the security seal Within 30 seconds after mounting in case of the analog m...

Page 19: ... yes 1 no no yes CL yes yes yes yes 1 yes 1 yes 1 no yes yes yes GPRS no no no no no no no no no no GSM no no no no no no no no no no RM RF no no no no no no no no no no Restrictions Only 1 module with fast pulses is possible only permissible in socket 2 min pulse duration 2 ms if pulse module 1 is not fitted 5 ms if pulse module 1 is fitted Subsequent mounting of a further pulse module in module ...

Page 20: ...f a shielded cable is used the shield must not be connected to the side of the me ter connect to one end only The pulse modules WZU P2 and WZU P2L enable the meter to communicate with a pulse collector to transmit measured values It permits the output of pulses that can be derived from the quantity of heat volume tariff register 1 or tariff register 2 Two channels are available whose functions can...

Page 21: ... cell is required Following can be set Pulse type linear or scaled pulses Pulse output Energy or volume Pulse duration if only 1 pulse module is fitted o From 2 ms to 100 ms in increments of 1 ms Pulse duration if 2 pulse modules are fitted o From 5 ms to 100 ms in increments of 5 ms A suitable device can be used to receive and evaluate the pulses The settings must be made in accordance with the c...

Page 22: ...t to transmit measured values For the WZU MB the scope of data can be preset with a jumper With the 2 M bus modules the secondary address is identical for both modules This address can be changed on the meter via the module plugged into socket 1 or via M bus The data in the M bus module are refreshed at 15 minute intervals Using the UltraAssist software a shorter sampling cycle can be set on the W...

Page 23: ...pulse inputs the cable must always be electrically isolated from the M bus inputs of the MI module The analog module WZU AM converts the measured value from the heat meter to an analog signal Each module has 2 channels whose functions can be configured independently Parameterization selection of measured value and output range is performed with the service software The output signal is refreshed a...

Page 24: ... or earthing is not permitted Meter ID pulse valency and the meter readings for the pulse inputs can be prede fined by telegram In the RF module the pulses are not multiplied by their pulse valencies The pulse valencies are merely stored in one register each for information The assignment is made only when the data read out are evaluated The RF modules WZU RF and WZU RF EXT enable the meter to com...

Page 25: ...Configurable report templates for manufacturer specific reports on values about the system etc Configurable per SMS http or Telenet Updating applications firmware and resources via GPRS remote control The module must be plugged into socket 2 The module has a built in M bus master capable of reading up to another 8 M bus meters If the bus is overloaded communication problems with the connected slav...

Page 26: ...igits depending on the parameter settings made without or with 1 decimal place When using the open collector circuit the polarity of the inputs must be observed Tariff control The following options are available for tariff control The summation of energy and volume in the standard registers is performed independently of the tariff situation Threshold value tariff tariffs T2 3 4 5 6 Tariff register...

Page 27: ...tariff registers 1 or 2 The summated energy is calculated from the temperature differential of return and defined return threshold and not from the temperature differential Above return threshold T1 is summated Below return threshold T2 is summated Display of tariff situation on the LCD The current tariff state is shown in the user loop together with the energy or the volume No tariff state is sho...

Page 28: ...nd the past 18 months without time stamp Serial No Description 1 F0 air in measuring tube 2 F1 interruption flow temperature sensor 3 F2 interruption return temperature sensor 4 F3 error temperature electronics 5 F5 short circuit flow temperature sensor 6 F6 short circuit return temperature sensor 7 F8 sensor error 8 hours 8 F9 ASIC error 9 Above max temperature in the flow measuring section 10 Be...

Page 29: ... 15 years 1 hour 24 hours For measuring periods below 1 hour the largest value from the maximum values calculated within 1 hour applies The data are recorded with their values and time stamps Parameterization and readout are performed via the optical interface with the service software Data transmission is in a manufacturer specific format Value set for data to be recorded Meter readings at the en...

Page 30: ...oned the user must ensure proper functioning In that case Siemens will not provide any services and warranty Technical data Measuring range national approvals may differ 2 180 C Range of temperature differential 3 120 K Temperature response threshold 0 2 K Thermal coefficient Shifting compensated Temperature measuring error without sensor 0 5 min Max 1 5 at 3 K Sensing element Pt500 as per EN 6075...

Page 31: ...mbar m3 h m3 h kg 0 6 110 G 3 4 1 2 6 2 4 150 1 5 0 5 1 190 G1 1 5 DN20 3 1 5 110 G 3 4 3 15 6 150 3 9 1 2 1 130 G 1 160 3 8 1 5 190 DN20 3 2 5 130 G1 5 25 10 200 5 6 1 8 1 5 190 220 5 3 1 7 DN20 3 3 5 260 G 1 1 4 7 35 14 60 14 4 5 3 DN25 5 6 150 G 1 1 4 12 60 24 240 12 3 9 3 260 12 60 24 180 14 4 5 3 DN25 5 10 200 G 2 20 100 40 130 28 8 8 2 6 300 110 30 9 5 4 DN40 130 28 8 8 7 15 200 DN50 30 150 ...

Page 32: ...ls For connecting line Backup in the event of a power failure III SELV AC 12 36 V or DC 12 42 V 50 60 Hz or DC 0 8 VA 2x1 5 mm Ø 5 0 6 0 mm 20 minutes Pulse outputs Number of outputs per module Standard pulses Pulse valencies Pulse duration Period duration Pulse for operating states Pulse duration for Ready Pulse duration for Fault Period duration Fast pulses Pulse duration Max pulse frequency Fas...

Page 33: ...DC 50 V 1 M bus load 1 5 mA Primary or secondary 300 1200 2400 4800 9600 baud Optional Yes No Pulse inputs Number of inputs Module battery Battery type Battery voltage Battery life Pulse duration Low Pulse duration High Frequency Polarity Galvanic isolation From meter From M bus inputs Pulse valency Display Output voltage Internal resistance Source current As per EN 1434 2 class IB 2 1 BR2477A LiC...

Page 34: ...or DC 12 42 V Max 170 mA at 12 V Max 2 VA Radio interface Frequency Transmitter power Antenna Readout frequency Sampling rate RF RF protocol RF range 433 MHz 8 mW can be changed to 5 mW with jumper Built in Max 1 readout per day average 8 s can be changed with jumper Proprietary Up to 100 m Pulse inputs Number of inputs Pulse duration Low Pulse duration High Frequency Polarity Galvanic isolation f...

Page 35: ...e WZU GPRS ANT with screwed connection E mail via SMTP Passive FTP mode HTTP POST and GET GMS data transparent M bus TCP transparent M bus SMS HTTP FTP GSM CSD 1 3 MByte 3 days 80 r h Enclosed to the module AC 100 230 V 20 15 50 60 Hz Max 2 5 VA Max 1 VA II M bus master interface Baud rate Number of M bus slaves Cable length Connection As per EN 13757 300 and 2400 baud Max 8 Max 1000 2 wire connec...

Page 36: ...stance Source current Pulse input closed Low Switching threshold low Resistance Pulse input open High Switching threshold high Resistance Max cable length As per EN 1434 2 class IB 2 50 ms 50 ms Max 10 Hz Once per hour FW 5 13 in EEPROM Yes Yes 0 01 to 10 000 00 liters per pulse in increments of 0 01 liters per pulse In m3 7 digits without or with 1 decimal place depending on parameter setting App...

Page 37: ...Directive Mechanical class M1 Electromagnetic class E1 Type approval As per EN 1434 4 Environment class A Measuring accuracy class 2 Conformity approvals certification and com patibility conformity as per See document CE2T5324xx C Tick See document CE2T5372en_C1 Environmental Declaration CE1E5372de contains data on environment compatible product design and assessment RoHS conformity materials used...

Page 38: ...ologies 2013 01 14 Dimensions Processor unit Top view Side view Adapter plate Cross section Mounting length 110 mm threaded Mounting length 130 mm threaded Mounting length 190 mm flanged Mounting length 190 mm threaded Dimensions in mm Processor unit Flow measuring section 0 6 2 5 m 3 h ...

Page 39: ...nections Flow measuring section up to 3 5 m 3 h flanged connections Product no qp m h PN bar DN a b Øc Ød Øe No of holes f g UH50 x46 3 5 25 25 260 51 115 85 14 4 68 18 UH50 x52 6 25 25 260 51 115 85 14 4 68 18 UH50 x61 10 25 40 300 48 150 110 18 4 88 18 UH50 x65 15 25 50 270 46 165 125 18 4 102 20 UH50 x69 200 UH50 x70 25 25 65 300 52 185 145 18 8 122 22 UH50 x74 40 25 80 300 56 200 160 18 8 138 ...

Page 40: ...40 40 Siemens Ultrasonic heat and cooling energy meters UH50 CE2N5324en Building Technologies 2013 01 14 2012 2013 Siemens Switzerland Ltd Subject to change ...

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