CPT Turbine Quantometers - Gas Meters

1 DESIGN AND FUNCTION2GENERAL TECHNICAL DATA3MEASUREMENT OUTPUTStable 2:CPT Quantometers have beendesigned in order to provideour customers with reliableand inexpensive measuringinstruments for secondary flowmeasurements.Our great experience in designingand manufacturing ofturbine and rotary gas metersresulted in the developmentof industrial quantometers.Taking into account our customers’demands we createdthe instrument with excellentmetrological characteristicsand operating performanceclose to performances of theturbine gas meters designedfor custody transfer measurements.Other advantages of the CPTQuantometers are as follows:high quality, easy maintenance,wide range of external devicesthat can co-operate with thequantometers, e.g. volumecorrectors, data loggers, datatransmission systems.Due to that the CPTQuantometers are wellaccepted by our domesticand foreign customers.The basic componentsof the CPT Quantometerare as follows:pressure resistantmeter bodyinlet flow conditionermeasuring cartridge withthe turbine wheelmagnetic coupling as thetransferring elementbetween measuringcartridge and the indexindex headmm506580100150200DNinch22,53468G406565100100160250160250400400650100010001600Maximumflow Q max[m 3 /h]651001001601602504002504006506501000160016002500Minimumflow Q min[m 3 /h]6101088132013203232508080130LFpulse rate[m 3 /pulse]0,111111010PRESSURE OUTPUTThe operating pressure (reference pressure) can be taken from the pressure tap,marked pr, located on one side of the meter body.PULSE SENSORSThe mechanical index unit indicates the actual volume of the measured gas at operatingtemperature and operating pressure. It can be rotated axially by 350° in order tofacilitate the readings and enable easier connection of pulse sensor plugs.The index unit is provided with one low frequency LFK reed contact pulse transmitter,as a standard. On request the index may be equipped with:- LFI inductive pulse sensor (NAMUR)- HF inductive pulse sensor (NAMUR)HF (index)U i= 20 V DCI i= 60 mALFIU i= 20 V DCI i= 60 mALFKU i= 15,5 V DCI i= 52 mApressure rating:PN16, PN20, ANSI150P i= 80 mWL i= 150 μHP i= 130 mWL i≈ 350 μHP i= 169 mWL i≈ 0ArgonButaneGasCarbon dioxideCarbon monoxideEthaneEthyleneHeliumMethaneNatural gasNitrogenChemicalsymbol(formula)ArC 4H 10CO 2COC 2H 6C 2H 4HeCH 4-N 2Density ρ[kg/m 3 ]1,662,531,841,161,271,170,170,67~0,751,16Densityrelated to air1,382,101,530,971,060,980,140,55~0,630,97Gas meterexecutionstandard IIBstandard IIBstandard IIBstandard IIBstandard IIBstandard IIBstandard IIBstandard IIBstandard IIBstandard IIBnominal diameter:meter bodies:flow:DN50 up to DN200 standard range, other on requestaluminium6 to 2500 m 3 /h other on requestrangeability:1:20 minimum at atmospheric pressureSome smaller size meters have reduced ranges.temperature range: gas temperature -20°C to +60°Cambient temperature -25°C to +70°Callowed medias: see table 1operating position: horizontal or verticalC i= 150 nFC i= 250 nFC i≈ 0table 3: Permissible supply parametersof intrinsically safe circuits.fig. 2 Location of measurementoutputs (top view)The CPT Quantometers may be provided with up to 7 pulse sensors:LFK – low frequency reed contact pulse sensor LFK 1, LFK 2LFI – low frequency inductive pulse sensor LFI 1, LFI 2HF – inductive pulse sensor in the index unit HF 1, HF 2HF – inductive pulse sensor over the turbine wheel HF 3AFK – anti-fraud reed contactAFKPropaneAcetyleneHydrogenAirC 3H 8C 2H 2H 2-1,871,090,0841,201,560,910,071,00standard IIBspecial IICspecial IICstandard IIBABmmmmDN5010065DN6512080DN8012080DN 100150100DN 150180127DN 200200146The turbine wheel, as a standard, is made of aluminium. This allowsto provide each CPT Quantometer with one HF3 inductive pulse sensor.There are no extra costs due to the replacement of the turbine wheel.table 1: Physical properties of mostpopular gases that may bemeasured with the CPTQuantometer; densityat 101,325 kPa and at 20˚Cfig.1 Basic dimensions of CPT QuantometerCEFGHWeightbolts x LPN16bolts x LANSI150mmmmmmmmmmkgmminch18157741982503,54xM16x2004x5/8x7,7521169862092774,98xM16x2204x5/8x8,75211698620927758xM16x2204x5/8x9,0291821002233037,28xM16x2508x5/8x10,255020712524134911,68xM20x3008x3/4x12,05622315627240849,212xM20x3208x3/4x13,0Pin No1 - 42 - 53 - 6Socket 1pulse sensorsLFK 1 (standard)LFI 1HF 1 or AFKSocket 2pulse sensorsLFK 2LFI 2HF 2fig. 3 Pulse sensor pin numbering in sockets 1and 2 installed in the index.The sockets match the TUCHELplug No C091 31H006 100 2Pin No3 - 4HF overturbine wheelHF 3fig. 4 Pulse sensor pin numberingin socket of the HF3 pulsetransmitter installed inthe meter body.The sockets matchthe TUCHEL plugNo C091 31D004 100 2