Electronic Turbine Meter TERZ 9 PRODUT INFORMTION Reliable Measurements of Gas
EETRONI TURINE METER TERZ 9 Methode of operation, construction 2 Methode of operation The TERZ 9 electronic turbine meter is a flow meter which directly measures the flow rate of gases at measurement conditions. The flow rate measured and the volume are displayed on an electronic totalizer. The operating principle of the meter is based on velocity measurement using a turbine wheel. The gas flow passes the ring-shaped inlet section of the flow straightener and reaches the coaxially mounted turbine wheel, whose speed is proportional to the mean velocity of the gas flow within the scope of the measuring range. The speed of the turbine wheel is recorded inductively using non-contact measurement by a pulse-wire sensor and a permanent magnet. Due to the fact that the signal frequency is directly picked up at the turbine wheel, the meter is also suitable for control applications. onstruction The electronic turbine meters form a series of uniform construction. Each meter consists of four structural units (see drawing). n aerodynamic flow straightener fitted into the meter case constricts the effective cross section of the pipe to form a ring-shaped cross-sectional area and substantially eliminates turbulence. This increases the velocity of the flowing gas. The shaft mounted with ball bearings carries the turbine wheel on the one side and a permanent magnet rotating before the sensor on the other. The duct of the sensor sleeve towards the unpressurized section of the electronic totalizer is sealed off by a pressure-tight O-ring. y means of the clamping screw, the electronic totalizer can be fixed in the most favourable position for taking readings. Socket Totalizer Earthing screw Sensor sleeve lamping screw O-ring O-ring Sensor Flow straightener Permanent magnet Turbine wheel all bearing
EETRONI TURINE METER TERZ 9 Features, electronic totalizer Features Electronic totalizers (Main totalizer, additional start-stop or resettable totalizer for external totalizer disablement in order to suppress the slow-down effect of the turbine wheel after the gas flow has stopped.) 2 sensor inputs (option) with mutual monitoring attery mode (version without a current board) Service life of the battery is a minimum of years. -20 m current output (transmitter) (only with the version with a current board) ow-torque metering system with long-term stability (apart from the turbine wheel, there are no mechanically actuated parts) F and HF pulse outputs (The pulse value of the F pulse output is userprograable.) Intrinsically safe circuit, approved for zone 1 Degree of protection: IP 5 Flow display Storage of maximum values (Qm) Temperature ranges (standard) Fluid temperature range: -10 to +50 mbient temperature range: -20 to +0 Pressure rating: PN 10 through PN 100, NSI 150 through NSI 00 Special designs with a higher pressure rating are possible. ompact construction with a rotatable meter head Option for use as a remote totalizer larm output (option) Electronic totalizer Possible connections of the electronic totalizer: HF pulse output (high frequency) direct signal frequency F pulse output (low frequency) decade-scaled Switch input for stopping the totalizer -20 m current output Version with a current board (option) Transistor, open collector Transistor, open collector Switching contact (potential-free) urrent loop connection (-20 m, 2-wire technology) U max = 28 V (Ex) 0 V (Non-Ex) U max = 28 V (Ex) 0 V (Non-Ex) Totalizer stop: closed contact U max = 28 V U min =.0 V U min =.0 V U min = 12 V I max = 0 m I max = 0 m I max = 2 m T pulse = 1 ms T pulse = 125 oder 250 ms I min =.5 m f max = 250 Hz For frequency values, see table below Overview section f max = Hz For possible setting values, see table below Overview section Error less than 1% of the final value. External power supply unit required.
2 VD urrent output -20m yes no IP5 EETRONI TURINE METER TERZ 9 Types of gas, measuring accuracy, maintenance, approvals Types of gas The TERZ 9 standard design is suitable for all gases complying with DVGW ode of Practice G20. The materials used are appropriate for gases and fuel gases, such as natural gas, refinery gas, liquid gases and their mixtures, nitrogen, O 2 (dry), air and all inert gases. For corrosive and chemical gases, there are special designs available with PTFE lining, special material, special lubrication, etc. Measuring accuracy Measuring error: Q min to 0.2 Q max 0.2 Q max to Q max DN 25: ± % ± 2% DN 0, DN 50: ± % ± 1.5% DN 80: ± % ± 1% DN 100: ± 2% ± 1% Reproducibility: ± 0.1% Maintenance ll turbine meters up to and including the nominal size of DN 150 are fitted with permanently lubricated bearings and require no maintenance. From the nominal size of DN 200, the meters are fitted with a lubricator. ubrication has to be performed in compliance with the operating instructions (see also lubrication instruction plate on the meter). pprovals II 2 G EEx ib[ia] II T / T as per certificate of conformity No.: TÜV 02 TEX 1970 DVGW product ID No.: E-0085N0292 (Testing in accordance with the Directive for Pressure Equipment 97/2/EG) onnection of the current output (example for installation in areas subject to explosion hazards) - 0085 F HF pulse outputs urrent loop 2 V D EEx i supply unit KFD2-ST-Ex 1 urrent output -20 m -20 m current output (option) The TERZ 9 version with a current board has a currentloop connection (-20 m, 2-wire technology). power supply unit and, if appropriate, a 2 V power pack are required to power the device and output a current. In addition, a backup battery can be provided as an emergency power supply. Hazardous area Safe area
EETRONI TURINE METER TERZ 9 Overview, pressure loss Overview Nominal size DN Measuring range Pulse value Pressure loss Q min - Q max F 1) HF 2) Δp ubrication in. m /h pulses/m pulses/m mbar permanently lubricated oil pump 25 1 2.5-25 10/100 150 0 1½ - 70 1/10/100 7800 50 2-100 1/10/100 7800 5 80 100 150 200 250 00 00 500 00 8 8 10 10 12 12 1 1 20 20 2 2 1-10 1-250 25-00 25-00 0-50 0-50 5-1000 100-100 100-100 10-2500 10-2500 250-000 250-000 00-500 00-500 50-10000 50-10000 1000-1000 1000-1000 100-25000 /10 /10 /10 /10 /10 /10 0.01/0.1 0.01/0.1 0.01/0.1 275 275 1250 100 00 0 0 190 15 80 75 8 28 2 1 12 7 1 10 12 8 7 9 8 9 9 5 1) Standard values (set in the factory) are shown in bold type. 2) pproximate value; the exact value is determined during calibration. Pressure loss The pressure loss Δp stated in the table applies to natural gas at Q max and 1 bar(a). From this, the pressure loss at measurement conditions can be calculated in accordance with the formula below. Pressure loss as per the formula ρ n Q m 2 Δp m = Δp -------- p m ( --------- ) 0.8 Q max Δp m = Pressure loss at measurement conditions (p m, Q m ) in mbar Δp = Pressure loss at Q max and natural gas at 1 bar in mbar (see table) ρ n = Standard density of the process gas (kg/m ) p m = Pressure at measurement conditions in bar(a) Q m = Flow rate at measurement conditions (m /h) Q max = Maximum flow rate Example: ir, nominal meter size DN 100, measuring range 20-00 m /h, p m = 1.1 bar(abs), ρ n = 1.29 kg/m, Q m = 250 m /h. Take from the table: Δp = mbar Hence: 1.29 250 2 mbar = 2.7 mbar 0.8 00 Δp m = -------- 1,1 ( --------- )
EETRONI TURINE METER TERZ 9 Types of constructions and dimensions Types of construction and dimension Flanged-end design (F) Sandwich design (S) Monoflange design (M) Threaded-end design (G) (daptor-flange mounting) (only aluminium case) Weights and measures Pressure rating ase design G Threads F Flanges M Monoflanges Nominal size Weight kg 1) PN 10 PN 1 25 2) 185 80 15 195 lu 5) 0 ) 10 80 15 195 lu 5) NSI 150 NSI 00 NSI 00 50 150 0 180 25 10 80 120 5 215 15 1 100 150 50 225 5 25 150 175 70 225 10 0 200 200 70 280 70 0 250 00 15 20 50 70 00 00 500 00 00 95 25 580 100 50 200 25 10 200 00 15 5 50 180 00 5 5 80 00 750 110 85 70 00 750 20 85 810 50 900 10 0 870 00 900 280 0 920 850 50 80 0 175 255 15 80 120 5 200 00 5 100 150 50 225 5 50 150 175 70 270 5 100 200 200 70 05 510 10 250 250 85 5 590 200 50 80 0 15 195 12 ) lu 80 120 0 200 280 20 S 100 150 50 220 0 0 Sandwich 150 175 70 250 00 50 200 200 70 280 50 70 250 280 85 15 50 110 1) The weights are approximate values. Devices with a lower pressure rating can have a lower weight. Special designs on request 2) External thread R 1½ ; with coupling kit: internal thread Rp1 ISO 7-1, overall length 2 ) External thread R 2¼ ; with coupling kit: internal thread Rp1½ ISO 7-1, overall length 20 ) kg for PN 10 and PN 1 (aluminium case) 5) max. pressure for combustible gases: 5 bar
2 VD urrent output -20m yes no - 0085 IP5 EETRONI TURINE METER TERZ 9 Options for installing the electronic totalizer, device variants Options for installing the electronic totalizer y installing the electronic totalizer in different ways, optimum readings can be taken in any position. If no special type of installation is specified, the totalizer is to be installed in accordance with the figure below. Standard design Totalizer 00019 F 1. IYY cable 2x0.75 blue 7 00019 F 1. 00019 F 1. Max. cable length: 50 m Options for installing the totalizer Remote totalizer Measuring element Device variants Our product range also includes the following device types which are based on the electronics of the TERZ 9: TRZ0-TE/TE electronic turbine meter 1 or 2 channels, measuring element as with the TERZ 9, but incorporated into the housing of the TRZ 0 or TRZ 0-. The 2-channel version has been approved for custody transfer measurement (PT 7.211/02.1). E 2 volume corrector Directly installed on a turbine meter or volumeter with electronic measuring element (Wiegand sensors) or 1-channel version installed together with a (separate) mechanical totalizer (volume pulses from reed contact). The E 2 includes a Vm totalizer and a corrector function with measured pressure and temperature values. The pressure transmitter is incorporated into the housing. ll variants receiving signals from Wiegand sensors, i.e. all variants which are directly installed on the meter, have F and HF pulse outputs and are available as devices with a current output. E 2 volume corrector
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