SONOMETER 2000 Ultrasonic heat meter

Transcription

1 SONOMETER 2000 Ultrasonic heat meter Description/Application The SONOMETER 2000 is an ultrasonic heat meter especially designed for measuring the water and energy consumption in district heating networks. The range of used dimensions from DN 25 to DN 80 enables measuring of flows from 0,06 to 80 m 3 /h. The SONOMETER 2000 is designed for and approved to counter settlements acc. to OIML R75 class 4 and EN Features - High performance accuracy. - Measurements are not affected by, the presence of contaminating particles, chemical substances or magnetite in the district heating water. - Static metering with no moving parts means no wear and tear. - Wide dynamic range. - Can be mounted horizontally or vertically. - Low pressure drop. - Compact design. - Ultrasonic signals are insensitive to layers due to direct shot. The SONOMETER 2000 is able to handle 3 types of applications: District heating/boiler application Chilled water application Combined heating/cooling application DH-SMT/PL VD.SH.A1.02 Danfoss 06/2006 1

2 Ordering The SONOMETER 2000 build-up number system, in which the individual part elements are defined. A B B B C DD EF G H K L MM NN P Flow meter Size Q n (m 3 /h) Cal. Connections (sets) No tail pieces 0 Tail pieces R ½ x G¾B 1 Tail pieces R ¾ x G1B 2 Tail pieces R 1 x G5/4B 3 Tail pieces R 1½ x G2B 4 Weld-on tail pieces x G1¼B A Weld-on tail pieces x G2B B PN Without flow meter 0 BBB 0 BBB 0 BBB 260 mm x G1¼B 3,5 EN G202 DN 25 3,5 EN D mm x G1¼B 6 EN G204 DN 25 6 EN D206 DN 32 6 EN D mm x G2B 10 EN G205 DN EN D208 DN EN D209 DN EN D210 DN EN D211 DN Std DN Std DN EN DN Std DN Std DN EN DN Std DN EN DN Std DN EN DN Std DN EN DN Std DN Std DN Std DN Std DN Std DN Std DN Std DN Std DN Std DN Std 0321 Number system for the flow meter, type SONO 2500 CT, flow part for SONOMETER 2000 Number system for the flow meter pulse code for INFOCAL 5 intended for SONOMETER 3000 Energy calculator, type INFOCAL 5 without energy calculator 00 for district heating, flow meter in forward pipe 0F for district heating, flow meter in return pipe 0R for chilled water, flow meter in forward pipe (cold pipe) CF*) for chilled water, flow meter in return pipe (hot pipe) CR*) for combined cooling/heating, flow meter in forward pipe (hot pipe in winter) SF*) for combined cooling/heating, flow meter in return pipe (cold pipe in winter) SR*) *) CR/CF, SR/SF only available with country code NN = 00 Verification 0 Without type approval mark 1 With approval mark With approval mark and 2 verification With approval mark, 3 verification and certificate Country code Country code 00, DE, SE, AT etc. Neutral country code 00 is with documentation in English Extra functions 00 Standard (no extra function) 0A Accounting date T0 Tariff function TA Tariff and accounting date Display units 1 GJ 2 KWh 3 MWh 4 Gcal Optional modules 0 No modules 1 Data input, input A and B 2 Data output, 2 pulse output CE, CV 3 M-bus module and input A and B Voltage supply 0 No power supply 1 3,6 V battery supply V a.c. supply 3 24 V a.c. supply Temp. sensor pocket sets 0 No accessories A 40 mm brass pocket B 85 mm brass pocket C 120 mm brass pocket K 85 mm steel pockets L 120 mm steel pockets M 155 mm steel pockets N 210 mm steel pockets V ½ x 10 mm adapter for direct sensor S Ball valve DN 15 T Ball valve DN 20 U Ball valve DN 25 Sensor type 10 No sensors included 1A Pt 500, direct sensor 1.5 m cable 1B Pt 500, direct sensor 3 m cable 1C Pt 500 pocket sensor 6 mm, 1.5 m cable 1D Pt 500 pocket sensor 6 mm, 3 m cable 1E Pt 500 pocket sensor 6 mm, 5 m cable 1F Pt 500 pocket sensor 6 mm, 10 m cable 1G Pt 500 pocket sensor 6 mm, 20 m cable 2 VD.SH.A1.02 Danfoss 06/2006 DH-SMT/PL

3 Ordering examples Complete heat meter SONOMETER 2000 A B B B C DD EF G H K L MM NN P G R 1D B PL 1 The complete heat meter SONOMETER 2000 consisting of flow meter type SONO 2500 CT, Q n =10 m 3 /h, PN 25, size 300 mm x G2B; tail pieces R 1½ x G2B; energy calculator type INFOCAL 5 for district heating and flow meter in return pipe; set of pocket sensors 6 mm, type Pt 500 with 3 m cable; set of 85 mm brass pocket; 3,6 V battery supply; module with data output, 2 pulse output CE, CV; display with GJ units; standard function; documentation in Polish; with approval mark. Flow meter, type SONO 2500 CT only A B B B C DD EF G H K L MM NN P G PL 1 The flow meter, type SONO 2500 CT consisting of flow meter type SONO 2500 CT, Q n =10 m 3 /h, PN 25, 300 mm x G2B; tail pieces R 1½ x G2B; documentation in Polish; with approval mark. Energy calculator, type INFOCAL 5 with temperature sensors only A B B B C DD EF G H K L MM NN P R 1D B PL 1 The energy calculator, type INFOCAL 5 with temperature sensors dedicated for flow meter type SONO 2500 CT, Q n =10 m 3 /h, PN 25, 300 mm x G2B; tail pieces R 1½ x G2B and consisting of energy calculator, type INFOCAL 5 without defined application; set of pocket sensors 6 mm type Pt 500 with 3 m cable; set of 85 mm brass pocket; 3,6 V battery supply; module with data output, 2 pulse output CE, CV; display with GJ units; standard function; documentation in Polish; with approval mark. Set of temperature sensors only A B B B C DD EF G H K L MM NN P J D B PL 1 The set of temperature sensors consisting of set of pocket sensors 6 mm type Pt 500 with 3 m cable; set of 85 mm brass pocket; documentation in Polish; with approval mark. Accessories BUS communication The energy calculator needs a special adapter cable to communicate with a PC for signal compatibility with the RS 232 level. To access the terminals, it is necessary to use one of the supplementary modules pulse output or input module, which, in addition to specific terminals - both have 3 terminals for connection to a PC. Pulse output module Module contains 3 terminals for DATA, REQUEST and GND. There are also 2 x 2 terminals for CE, CV/Alarm. Both outputs are galvanically separate. Pulse sequence CE: 1 pulse per change in the least significant digit in the energy unit and resolution selected. Pulse sequence CV: 1 pulse per change in the least significant digit in the volume unit and resolution selected. Alarm: 1 pulse per hour for as long as the unit has detected a fault. The function is not activated in the standard configuration. M-bus module The M-bus protocol is in accordance with EN and EN For communication with an M-bus, it is necessary to fit energy calculator with an add-on module. The M-bus module contains, in addition to terminals for BUS connection, terminals for counter inputs A and B. DH-SMT/PL VD.SH.A1.02 Danfoss 06/2006 3

4 Technical data Energy calculator, type INFOCAL 5 Heat meter EN 1434 Chilled water EN 1434 pr. A1 Temperature range Θ: C Θ: C Differential temperature ΔΘ: K ΔΘ: K Approved in Accuracy (EN 1434 demand) Max. ± ( K/ΔΘ) [%] (Danfoss) Max. ± ( K/ΔΘ) [%] accordance with Flow range Q n (q p ) m 3 /h Environment class A Measuring range C Differential temperature K Temperature input Sensor type Pt 500 Sensor connection 2 wire Measurement resolution 0.01 C Pulse/frequency 400 Hz 1) Flow input 1 Pulse ON time 0.5 ms Pulse OFF time 1.5 ms Pulse/frequency 400 Hz 1) Pulse input A and B Pulse ON time 0.5 ms Pulse OFF time 1.5 ms Bus output Protocol EN Connection Open collector, 2400/300 baud, 3.6 V Optical connection Protocol EN Connection Optical eye, 600 baud, EN ON time > 30 ms ON current 10 ma Pulse output CE and External supply 24 V d.c. CV/Alarm OFF time with alarm Approx. 1 hour Frequency 10 Hz Internal voltage /-0.4 V d.c. Current consumption Typically 45 ma Supply data Battery 3.6 V lithium D cell Battery lifetime Typically 8 years with Danfoss flow meter, 10 years with independently powered flow meter Power supply 230 V a.c. +15/-30% 50/60 Hz or 24 V a.c. Back-up 3.0 V CR 2032 cell (only in calculators with MM = OA, TO, TA) Generally EN 1434 Ambient temperature C Storage temperature C Environment/safety Enclosure IP 54 in accordance with IEC 529 Vibrations 1G, 1 & 1000 Hz in accordance with IEC Free fall IEC EMC EN 1434 (EN / ) Personal safety EN Top PC Lexan 141R Transparent 111 Pipe/wall fitting PA 6,6 GF25 Materials Other plastic parts ABS Cycolac GPM500 Gaskets Neoprene Rubber bushing EPDM 50 Packaging Biodegradable cardboard 1) The combined pulse frequency at flow 1, in A and B may not exceed 400 Hz, whether they are used one at a time or simultaneously. 4 VD.SH.A1.02 Danfoss 06/2006 DH-SMT/PL

5 Ultrasonic flow meter, type SONO 2500 CT Nominal diameter DN Thread connection - G1¼B G1¼ B - - G2B Nominal flow, q p (Q n ) (m 3 /h) Min. flow q i (l/h)* Min. flow cut off (l/h) Max. flow cut off at q s (m 3 /h) Pressure loss at qp(q n ) (bar)** Nominal heat power, kw*** Water temperature +20 C to C (horizontal) (3.5 m 3 /h only 130 C) +20 C to C (vertical) Output signal, pulse/l Pulse duration 3.9 msec. Max. frequency 64 Hz Power consumption P max. < 360 µw I avg 100 µa I peak 10 ma Power supply From integrator, 3.65 V ± 0.1 V d.c. (Lithium battery) I start (average) < 15 ma t start sec. Ambient temperature 0 C to +55 C Storage temperature - 20 C to +70 C Humidity < 80 % Water temperature +20 C to +150 C (3.5 m3/h only 130 C) Enclosure IP 65 Electrical connection between heat calculator/flowmeter Max. 2.5 m cable (which is incl.) Connection max. pressure 25 bar Accuracy Better than EN , class 2 Straight inlet pipe Min. 5 x DN Environmental classification EN enviromental class C (Industrial Installations) Installation Horizontal/vertical (no influence on accuracy) Pipe materials W (G-CuSn5ZnPb) (3.5 m 3 /h also polymer comp. liner) Transducer materials Stainless steel W Flange gaskets Fibre gasket (non-asbestos) O-ring EPDM * Min. flow, when the accuracy is better than 3 % ** Pressure loss acc. to EN *** Calculated at ΔT = 40 C and q P Pressure drop curves DH-SMT/PL VD.SH.A1.02 Danfoss 06/2006 5

6 Temperature sensor Type Direct mounted Type DS (EN 1434) Pocket sensor Type PS (EN 1434) Element Pt 100/500, 2-wire (EN 60751) Pt 500, 2-wire (EN 60751) Pairing 10 C, 80 C, 130 C Media temperature C C Response time t 0,5 Typically 0.8 sec./0.4 m/sec. See spec. sensor pocket Medium Circulation water Pressure rating PN 16 See spec. sensor pocket Protection IP 67 IP 65 Pipe material W-No (uns -n06600) W-No (AISI 304 Ti) Sensor pockets Type Brass Stainless steel Media temperature C Medium Circulation water Response time t 0.5 Typically 9 sec./0.4 m/sec. Typically 5 sec./0.4 m/sec. with pasta Typically 13 sec./0.4 m/sec. Typically 5 sec./0.4 m/sec. with pasta Pressure rating PN 25 Material CUZN 40 Pb2 (Ms 58) W-no Adapter CUZN 40 Pb2 (Ms 58) Design and function The SONOMETER 2000 consists of set, as follows: - Ultrasonic flow meter, type SONO 2500 CT - Thermal energy calculator, type INFOCAL 5 with integral hardware and software for measuring flow rate, temperature and energy consumption - Temperature sensors Ultrasonic flow meter, type SONO 2500 CT The ultrasonic flow meter measures with the assistance of directly transferring pulses between sounders, without necessity of pulse reflecting from mirror s surfaces. Thanks to application of this innovative principle of operation the measures are characterized by accuracy and reliability, and in connection with wide range of dynamic measures those flow meters have assurance of more than 20 years operation stability. The ultrasonic principle is used in measuring the flow. Two ultrasonic transducers functioning as both transmitter and receiver are positioned opposite each other at the inlet and outlet of the flow meter. Ultrasonic signals are transmitted between both transducers. One signal travels in the same direction as the water flow, the other travels against the flow. District heating systems with ultrasonic flow meter Measurement is performed by determining the time the ultrasonic signal takes to travel with and against the flow. The principle can be expressed as follows: t up t down Δt v = K = K t up x t down t 2 t down = Time in the flow direction t up = Time against the flow direction v = Average flow velocity t = Transit time K = Proportional factor This measuring principle offers the advantage that it is independent of variations in the actual sound velocity of the liquid. Proportional factor K is determined by wet calibration. 6 VD.SH.A1.02 Danfoss 06/2006 DH-SMT/PL

7 Pulse output Red Yellow Blue SONO 2500 CT Typical calculator Energy calculator, type INFOCAL 5 The energy calculator made in microprocessor s technology is a device designed for counting energy consumption in district heating systems. Adulteration of reading by user is not possible. Reading of signals from the flow meter and from a pair of sensors the calculator in constant method counts and stores in read-only memory a data concerning energy consumption as well as other values connected with energy transfer control and necessary to settlements. Basic functions - High accuracy thermal energy metering - Optical data reading in accordance with EN Choice of battery, 230 V a.c. or 24 V a.c. - Instantaneous values for energy/volume flow - 24 months memory - Error logging with date and time Additional functions - Battery back-up of real time clock in the event of power failure - Tariff functions - Read-out of account date - Client-specific display format Add-on modules - Plug-in module with data output, pulse output for accumulated energy and water or output signal for failure - Plug-in module with data output and 2 extra pulse inputs - Plug-in module for M-bus communication and 2 extra pulse inputs Serial number/client number Maximum power/flow Instantaneous power Advanced functions for cooling/heating applications - Separate totalizer registers for cooling/heating applications - Zero point calibration of ΔΘ for cooling systems Display description The energy calculator has an easily-read 8-digit LCD display with associated pictograms for the various functions. As the display has been made for several applications, there will be figures/ symbols which are not used for normal district heating applications. The energy calculator has only one operating button. The display will always be configured for the application chosen, and for the selected display settings. In normal operation, the display will show cumulative energy values. Primary items A short press on the operating button changes from one main menu to the next main menu. Secondary items A long press changes the display to the associated sub-menu. Tariff record 1 and 2, tariff limits 1 and 2 Temperature sensor error Other error Main menu Sub-menu Pulse indicator Rest symbol DH-SMT/PL VD.SH.A1.02 Danfoss 06/2006 7

8 Display views Depending on the choice of extra modules and functions under the build-up number, the related display views are automatically opened. It is thus not necessary to define display views as these are automatically generated when ordering. It is possible to blank or add display views. Changes can be made using special reprogramming software or ordered directly from Danfoss. Maximum display views In views of values that include the date, the display will swap between value and date 8 VD.SH.A1.02 Danfoss 06/2006 DH-SMT/PL

9 Standard display views, district heating and chilled water applications (DD=OF/OR and DD=CF/CR) 1) (K= 0, MM= 00) 1) Display menu for combined cooling/heating systems (DD=SF/SR) 1) 1) please refer to Ordering paragraf on page 2 DH-SMT/PL VD.SH.A1.02 Danfoss 06/2006 9

10 Calculation Calculation of energy is based on the following formula: Energy = Volume x (T Hot - T Cold ) x K factor (T i ) Volume: T Hot : T Cold : K factor (T i ): Volume [m 3 ] of a given amount of water Measured temperature in the flow Measured temperature in the return Thermal coefficient of water based on the polynomial associated with Dr. Stuck s tables of enthalpy and heat content The energy calculation is made by a counter that depends on the size of the flow meter, pulse frequency and legal requirements. The calculator always carries out at least one energy calculation every 10 minutes if the flow meter has not sent enough pulses to prompt an energy calculation. Temperature measurement The energy calculator has been developed for paired Pt 500. For each energy calculation, a temperature measurement is taken according to a dual-slope measuring principle, and a measurement of two reference resistances. This compensates for temperature and long-term drift, and any effect of supply frequency (hum) on the temperature measurements is compensated for. Contact resistance between the top and bottom parts is compensated for by a three-conductor measurement. Permanent memory/account date reading The LOG of the calculator is updated every 10 minutes with all the cumulative values: - Date, - S energy, - S water, - S records 1 and 2, - peak values of energy or flow, - counter records A and B, - date/time and info code. The energy calculator allows for two possible account date outputs. If the use of account date output has been selected during configuration, the above data are stored to enable output to a selected date in the year. All data are stored for a further 24 months in a record for possible subsequent study of operating conditions in the system. Tariff record In addition to the main record, 2 extra records can be used: tariff records 1 and 2. There are two tariff limit values associated with each of the two records, which can be reprogrammed using Danfoss energy calculator reprogramming software. The following tariff types are available: - Power-based tariff, flow-based tariff, cooling tariff, return temperature tariff, flow-controlled tariff with summation of time. - The tariff record is set to flow-controlled tariff as standard, and qs is set as limit (depending of flow type). - Tariff records are not available whenever choosing an energy calculator for combined cooling/heating. Energy/volume maximum Energy and volume can be outputted for the previous three months with associated dates when the maximum power occurred. Integration time can be set to 15, 30 or 60 minutes. Standard factory setting: peak volume: 15 minutes; peak energy: 60 minutes. Views are NOT active in the standard display configuration. Error handling If energy calculator records an error, this will be indicated by a and a! in the display for a sensor error or for another error. The error will similarly be recorded on the LOG. The LOG can contain up to 10 failures with a statement of date/time of occurrence of the error and eventually occurrence of the error. Using the function key, it is possible to read the error code, which is indicated by an F. Resetting the error code is undertaken either using a hand terminal or by briefly separating the calculator top from the lower part and re-connecting it with the lower part, while the operating button is held down. The energy calculator is now in a reset mode, and error codes can be deleted from the display. The following errors can be detected: F1 Forward temperature sensor is interrupted or short-circuited. F2 Return temperature sensor is interrupted or short-circuited. F3 Internal equipment error. F4 Differential temperature high and no flow for 48 hours. F5 Water flow exceeds preset Qs. Accounting date output The accounting date is set as standard to June 1. Secondary accounting date is inactive. This function with associated display menu settings is activated in the build-up number under identification key MM. 10 VD.SH.A1.02 Danfoss 06/2006 DH-SMT/PL

11 Zero point calibration of differential temperature (only types CF/CR) Cooling systems always operate with a small Δt and a relatively high flow rate. For technical reasons no sensor pair provides completely accurate temperature difference measurements when the sensor temperature difference between forward and return flow is close to zero. The energy calculator type CF/CR contains a special zero point calibration routine that can be activated in order to minimize the temperature difference measuring failure. Normally the zero point calibration is not needed, but can be activated out in order to obtain maximum accuracy in the energy calculation. The zero point calibration function requires a short circuit between forward and return sensor in the cooling system e.g. by installing a valve V1. (See application drawing). Optical output The energy calculator is fitted with an optical infra-red send/receive port in accordance with IEC Protocol standard, EN (M-bus protocol). A reader head with a permanent magnet in accordance with EN 1434 can be used for programming/altering programming of readout data, configuration data, etc. The reader head can also be used for amendment of measuring data. Temperature sensors The temperature sensor set is designed for use with the energy calculator for measurement of the energy consumption in a district heating net. To ensure an accurate measurement of the temperature difference according to EN 1434, the sensors are delivered as matched pairs. The sensor set can be supplied with type approval marking according to local demands. Mounting Flow meter, type SONO 2500 CT The flow meter can be mounted in either forward or return pipes. The correct direction is indicated with an arrow on the flange or on the body. When horizontally mounted, the max. liquid temperature is 150 C. For 3.5 m 3 /h max. 130 C. The max. liquid temperature must be reduced to 120 C when the electronics (black enclosure) is turned upwards. When vertically mounted, the max. liquid temperature is also 120 C. The electronics (black enclosure) must not be insulated. The length before the flow meter must at least be 5 x DN. The flow meter must be filled completely with water during measurements. It is not necessary to use filters when using the flow meter. DH-SMT/PL VD.SH.A1.02 Danfoss 06/

12 Wiring The flow meter must be connected to the following terminals of energy calculator. - 9 red (+) - 10 yellow (signal) - 11 blue (-) Energy calculator, type INFOCAL 5 The energy calculator can be mounted in a panel, on a wall or as a compact fitting on flow meter (DN 25 - DN 50) using fittings included. It is not possible to fit energy calculator compactly on the other series. Instructions are enclosed with the product with a statement of the standard display configuration. Wall mounting Mounting on SONO 2500 CT Panel mounting Mounting on SONO 2500 CT 12 VD.SH.A1.02 Danfoss 06/2006 DH-SMT/PL

13 Dimensions Energy calculator, type INFOCAL 5 Flow meter, type SONO 2500 CT Nominal diameter Nominal flow, q p (Q n ) m 3 /h Flange diameter D, mm Bolt circle diameter d, mm Build in length L, mm High A, mm Weight, kg Flange 1) dimension F, mm Internal diameter d i, mm Thread 2) connection G - G1¼B G1¼ B - - G2B ) Flanges PN 25 acc. to ISO ) Thread acc. to ISO 228 DH-SMT/PL VD.SH.A1.02 Danfoss 06/

14 Temperature sensor Type Direct mounted Type DS (EN 1434) Pocket sensor Type PS (EN 1434) Diameter D (mm) ø 5,4/3,3 ø 6 Sensor length L 2 (mm) 27,5 50 Cable lenght C (m)?? Sensor pockets Type Brass Stainless steel Length L 1 (mm) L (mm) Diameter D 1 (mm) ø 8 Dimension G G ½ Adapter nipple Ball valve DN h H L R p ½ ¾ , VD.SH.A1.02 Danfoss 06/2006 DH-SMT/PL

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