Differential Pressure Gauges Model 711.12, with Bourdon ... - sini.se

MechanicalPressure MeasurementDifferential Pressure GaugesModel 711.12, with Bourdon Tube, Parallel EntryWIKA Data Sheet PM 07.02Applications• Measurement of differential pressures or of two differentpressures applied• For gaseous and liquid media that are not highly viscousor crystallising and will not attack copper alloy parts• Heating, ventilation and air-conditioningSpecial Features•••Scale ranges from 0 ... 0.6 barDifferential pressure with moving dialEconomical and reliableDescriptionDifferential Pressure Gauge Model 711.12Design2 independent measuring systems, parallel entries in lineNominal size in mm100, 160Accuracy class1.6Scale ranges0 ... 0.6 to 0 ... 1000 barScale range must be selected in relation to the highest totalpressure applied!In heating plants with circulating pumps, the overallpressure is usually defined as equal to the hydrostaticpressure plus the pump pressure.In order to ensure a good readability, the pressure differentialto be indicated should be no less than 1/6 of the fullscale range.When ordering please state both pressures:a) maximum pressure appliedb) differential pressurePressure limitationSteady: full scale valueFluctuating: 0.9 x full scale valueShort time: 1.3 x full scale valueOperating temperatureAmbient: -20 ... +60 °CMedium: +60 °C maximum (soft soldered)+100 °C maximum (brazed)Temperature effectWhen temperature of the measuring system deviates fromreference temperature (+20 °C):max. ±0.4 %/10 K of true scale valueIngress protectionIP 33 per EN 60 529 / lEC 529WIKA Data Sheet PM 07.02 ∙ 04/2008 Page of 2Data Sheet showing similar devices:Design with vee entry, Model 711.11; see data sheet PM 07.01

Standard versionProcess connectionCu-alloy,2 x G ½ B, male, 22 mm flats,plus-connection back, minus-connection front(with and identified)Pressure elements< 100 bar: Cu-alloy, C-type, soft soldered≥ 100 bar: stainless steel, helical type, brazedMovementCu-alloy, wear parts argentanDialAluminium, white, black lettering (andersrum wäre auch gut,aber in bisher für ACROSS geprüften Datenbl. hatten wir esimmer so rum gelassen)Pointer1 standard pointer: Aluminium, black1 scale pointer: Aluminium, whitescaled ±50 % of main scale rangeCaseSteel, blackOptions••••••Other process connectionCase and bezel ring of stainless steelDesign with duplex scale („duplex pressure gauge“)Measuring systems of stainless steel 1.4571(model 731.12),NS 100: liquid filling (model 713.12),NS 100: measuring system, case, bezel ring stainlesssteel and liquid filling (model 733.02),Subtracting movement (one pointer for differentialpressure scale), location of reversed pressure connection:-connection front, -connection back, Cu-alloyor stainless steelMedium temperature resistant up to max. 200 °C (onlywith measuring systems of stainless steel and withoutliquid filling)Panel or surface mounting flangeAlarm contact (data sheet AC 08.01), subtractingmovement••••Dimensions in mm1035177.01WindowInstrument glassBezel ringSlip-on bezel, Steel, blackNS Dimensions in mm Weighta b D G h ± 1 X SW in kg100 15.5 82 100 G ½ B 87 32 22 1.00160 15.5 86.5 160 G ½ B 118 32 22 1.60Process connection per EN 837-1 / 7.3Ordering informationModel / Nominal size / Scale range / Differential or duplex scale / Size of connection / Max. pressure applied / Differentialpressure span / OptionsModifications may take place and materials specified may be replaced by others without prior notice.Specifications and dimensions given in this leaflet represent the state of engineering at the time of printing.Page of 2 WIKA Data Sheet PM 07.02 ∙ 04/2008WIKA Alexander Wiegand GmbH & Co. KGAlexander-Wiegand-Straße 3063911 Klingenberg/GermanyTel. (+49) 9372/132-0Fax (+49) 9372/132-406E-mail info@wika.dewww.wika.de9029109 04/2008 GB