Transcription
PressureTemperatureLevelCalibration technologyRefrigeration andair-conditioning technology
Alexander Wiegand,Chairman and CEOWIKAAbout usAs a family-run business acting globally, with over 7,900WIKA ensures flexibility and the highest deliveryis a worldwide leader in pressure and temperatureboth standard and customer-specific solutions, arehighly qualified employees, the WIKA group of companiesmeasurement. The company also sets the standard in themeasurement of level and flow, and in calibration technology.Founded in 1946, WIKA is today a strong and reliablepartner for all the requirements of industrial measurementtechnology, thanks to a broad portfolio of high-precision instruments and comprehensive services.2performance. Every year, over 50 million quality products,delivered in batches of 1 to over 10,000 units.With numerous wholly-owned subsidiaries and partners,WIKA competently and reliably supports its customersworldwide. Our experienced engineers and sales expertsare your competent and dependable contacts locally.
ContentsInstrument requirements4Application: Compressor8Application: Liquid-cooled condenser/evaporator14Further applications16Calibration services20Conversion factors for pressure and temperature22This brochureWithin the refrigeration cycle and its periphery there areThis brochure assists you in selecting the right instruments.and monitored. This serves to control the plant in order toconditioning applications, we offer a comprehensive stand-many points where pressure and temperature are measuredguarantee a secure process run.Some of the measuring tasks are: Indication of pressure andtemperature in the lines of the refrigeration cycle on one ofthe main aggregates, control of fan speed or expansion valvespeed, respectively, filter monitoring, temperature measurement in the cooling room, level measurement of pressurevessels or valve control.Apart from the described products for refrigeration and air-ard program for the measurement of pressure, temperatureand level.In co-operation with you, we will develop tailored solutionsgeared to the individual requirements of your process.Talk to us.In addition to the multitude of applications also the size ofthe refrigeration system, the refrigerant etc. place particulardemands on the instruments. Here, WIKA is the competentpartner for measuring instruments for pressure, temperatureand calibration in all parts of refrigeration plants.3
Perfection in material and formIn view of the increasing requirements on refrigeration plants due to new refrigerants or leak-free systems thequality requirements for measuring instruments are also increasing. Thus the right choice of materials is decisivein order to get the best possible instrument.CaseThermowellscase means taking care of parameters such as pressure,directly – which is always advisable because of theChoosing the right material that determines the quality of thetemperature and field conditions. The refrigerant used is notdecisive, as the case usually is not exposed to the processmedium. WIKA offers plastic, brass and stainless steel cases.Wetted metal partsIf the temperature instrument is not put into the processprotection and exchangeability of the measuring instrument– but via a thermowell, various steels are suitable for thisprotective case. As standard material WIKA uses stainlesssteel 1.4571.The main decider in this case is whether the refrigerationplant is operated with an (H)FCKW/HFKW refrigerant orwith ammonia. If it is ammonia, the pressure element mustbe made of stainless steel (e.g. 1.4571, 1.4404). If it is an(H)FCKW/HFKW refrigerant, a copper-zinc-alloy (brass)is sufficient. The same is true for the pressure connection,the thermowell and the stem of the thermometer.SealingsThe process medium, which comes into direct contactwith the sealing material, as well as the pressure andtemperature are decisive factors for the selection ofthe suitable sealing material for O-rings or separatingdiaphragms. Especially formulated elastomer compoundsare mostly used. As standard WIKA offers the materialsNBR (acrylonitrile butadiene rubber), FPM (fluor propylenerubber) or EPDM (ethylene propylene diene monomerrubber), as an option FFPM (perfluor propylene rubber)or CR (chloroprene rubber) are partly possible as well.Our instruments are manufactured in accordance with the appropriatestandards, e.g. EN 837 for pressure measuring instruments.Further test certificates in accordance with different standards areavailable on request, depending on the instrument version, e g. GL(Germanischer Lloyd), PTB (Physikalisch- Technische Bundesanstalt),BAM (Bundesamt für Materialforschung und Prüfung), Goststandard Russia, TÜV (Technischer Überwachungsverein), etc.For thermowells certificates such as 3.1B can be requested as well.4
Instrument requirementsPressure gauges with electrical outputsignalsControl systems are gaining more and more importance inThe switchGAUGEs are based on a high-quality WIKAthe gauge itself is no longer sufficient, rather the measuredapplication, an integrated magnetic snap-action contact,industrial applications. Consequently, pressure indication onvalue must be transferred to the control system via anelectrical signal, e.g. by closing or opening of a circuit. WIKAis focusing on its mechatronic product line in order to satisfythis trend.mechanical pressure gauge which has, depending on theinductive or electronic contact (PLC), reed contact, microswitch or a transistor output (NPN or PNP).A pressure gauge with an electrical output signal from theintelliGAUGE series combines all the advantages of a localdisplay, without the need for a power supply, with the requirements of an electrical signal transfer for a modern electronicmeasured value registration.Refrigeration circuit QCCondenser, capacitor23PelExpansion valveCompressors14Evaporators Q05
Optimum connectionsThe connection of pressure and temperature measuring instruments to the process can be carried out via thermowells andmounting devices. Thus the connection can be specifically adjusted to the individual process requirements.Mounting flangesThere are three basic possibilities to mount a pressure gaugeto the process – besides the connection location: Surface mounting flange Panel mounting flangeDepending on the instrument version, these three optionsare available in several versions, e.g. steel, brass, chromeplated, polished, galvanised etc. Attention should be paidto the fact that not all versions can be combined with eachother. Mounting clampThermowellsCapillariesthermowell. This has the advantage that you can remove theis by means of capillaries. They are used forThe process connection for thermometers usually is ainstrument (for replacement or test) without having to openthe plant or stop the process.When choosing a suitable thermowell, one does not onlyhave to take account of the parameters of pressure, temperature and process medium, but also the velocity of flow, thedensity and the insertion length.In refrigeration technology, fabricated stainless steelthermowells or solid-machined thermowells machinedfrom solid body material in accordance with DIN 43772 arefrequently used. Depending on the threaded connectionof the thermometer, different designs with female or malethreads are used.6An additional type of process connectionpressure gauges and thermometers alike tobridge greater distances between measuringcell and reading point or to provide better protection for the measuring instrument againststrong vibrations, high temperaturesetc.As a typical application WIKA offersexpansion thermometers in edgewisedesign for measuring the temperature ofrefrigerated cabinets.
Instrument requirementsResistance of the elastomers (selection)RefrigerantR 11R 12R 12 B1R 13R 13 B1R 14R 21NBR – ––R 31––R 32– R 112– R 113 R 114R 114 B2R 115R 124R 134 aR 142 bR 152 aR 218R 290R 401 aR 401 bR 402 aR 403 bR 404 aR 407 aR 407 bR 407 cR 408 aR 409 aR 410 aR 413 aR 502R 507R 600 aR717 (liquid)R717 (gaseous)R717 (gaseous hot) highly resistant resistant– not resistantk.A. not specified –– – – – k.A.k.A.k.A.k.A. k.A.k.A.k.A.k.A. – ––R 22FKM k.A.k.A.k.A.k.A.–k.A.k.A.–k.A.k.A.k.A.k.A. k.A. –––EPDM– – – –– – k.A.k.A.k.A.k.A.k.A. k.A.k.A. k.A.k.A.k.A.k.A. k.A.k.A. FFKM – –––– –––– k.A.k.A.k.A.k.A.–k.A.k.A.–k.A.k.A.k.A.K.A. k.A.k.A.–––CR– k.A. k.A. PTFE k.A.k.A.k.A.k.A.k.A. k.A.k.A. k.A.k.A.k.A.k.A. k.A.k.A. Data are only recommendations. These may deviate, e.g. if using flotationoils or additives. Furthermore, manufacturer-specific compositions of theindividual elastomers may cause resistances to deviate in the maximumoperating range. Even unknown parameters and conditions in practicaluse may result in deviations. We therefore accept no liability for thecorrectness of the recommendations in an application case.7
CompressorsDue to the various structural shapes and design layouts of refrigeration plants there is also a great number ofdifferent compressors. Mainly reciprocating, screw and scroll compressors are used to suck in the refrigerant ata low pressure and compress it to a higher pressure.Other criteria for differentiation are for example the number of compressing stages, the way of cooling or theratio compressor – engine (open, semi-hermetic, hermetic).In order to monitor oil pressure and pressure in suction anddischarge line of the compressor WIKA offers all necessarymeasuring instruments.Pressure measurementTemperature measurementprogramme ranges from the tried and tested Bourdon tubeas bimetal, expansion or gas-actuated thermometers.For mechanical pressure measurement the productpressure gauge with plastic case over the diaphragm andcapsule pressure gauges to the sturdy stainless steel orspecial material pressure gauge. For electronic pressuremeasurement WIKA offers its customers a full range ofMechanical temperature measuring instruments are availableIn electrical temperature measurement WIKA deliversresistance thermometers and thermocouples, temperaturetransmitters complete the programme.sensor technology produced in-house – whether ceramicthick film, piezo-resistive or metal thin-film.8R-1AC-1Pressure transmitter with thinfilm measuring cellPressure transmitter withceramic measuring cellAccuracy ( % of span): 2 0 6 to 0 160 barMeasuring range: -1 7 to -1 45 bar Special case design for the bestSpecial feature:possible condensation tightness Resistant to all commonrefrigerantsData sheet:PE 81.45Accuracy ( % of span): 2 0 6 to 0 60 barMeasuring range: -1 7 to -1 45 bar Special case design for the bestSpecial feature:possible condensation tightness Resistant against the majorrefrigerantsData sheet:PE 81.46
Application: CompressorPGT23PGS23DPG40Bourdon tube pressure gaugewith electrical output signal,stainless steel, safety versionBourdon tube pressure gaugewith switch contacts, stainlesssteel versionDELTA-plus, differentialpressure gauge with integratedworking pressure indicationNominal size:Scale range:Accuracy class:Ingress protection:Data sheet:Nominal size:Scale range:Accuracy class:Ingress protection:Data sheet:Nominal size:Scale range:Accuracy class:Ingress protection:Data sheet:63 mm0 1 to 0 1,000 bar1.6IP 54, filled IP 65PV 12.03100, 160 mm0 0.6 to 0 1,600 bar1.0IP 65PV 22.02100 mm0 0.25 to 0 10 bar2.5IP 54, IP 65 (optional)PM 07.20DPGS40DPS40DPGT40DELTA-comb, differentialpressure gauge with integratedworking pressure indicationand micro switchDELTA-switch, differentialpressure switchDELTA-trans, differentialpressure transmitter withintegrated differential pressureand working pressure indicationNominal size:Scale range:Accuracy class:Ingress protection:Data sheet:Nominal size:Measuring range:Switch pointreproducibility:Ingress protection:Data sheet:Nominal size:Scale range:Accuracy class:Ingress protection:Data sheet:100 mm0 0.25 to 0 10 bar2.5 (optional 1.6)IP 54 (optional IP 65)PV 27.20Further information at www.wika.com100 mm0 0.25 to 0 10 bar1.6 %IP 54 (optional IP 65)PV 27.21100 mm0 0.25 to 0 10 bar2.5 (optional 1.6)IP 54 (optional IP 65)PV 17.199
Compressors111.10111.12131.11Bourdon tube pressure gauge,plastic case, lower mount (LM)Bourdon tube pressure gauge,plastic case, back mount (BM)Bourdon tube pressure gauge,stainless steel versionNominal size:Scale range:Nominal size:Scale range:Accuracy class:Data sheet:Nominal size:Scale range:Accuracy class:Data sheet:Accuracy class:Data sheet:1040, 50, 63, 80, 100, 160 mm0 0.6 to 0 400 bar(max. 40 bar with 160 mm)2.5PM 01.0127, 40, 50, 63, 80, 100 mm0 0.6 to 0 400 bar2.5/4PM 01.09, PM 01.17 (NS 27)40, 50, 63 mm0 0.6 to 0 400 bar2.5PM 01.05113.13PGS21PGS21.100/160Bourdon tube pressure gauge,plastic case with liquid fillingBourdon tube pressure gauge,stainless steel, fixed contactsBourdon tube pressure gaugewith switch contacts, industrialseriesNominal size:Scale range:Accuracy class:Ingress protection:Data sheet:Nominal size:Scale range:Accuracy class:Ingress protection:Data sheet:Nominal size:Scale range:Accuracy class:Ingress protection:Data sheet:40, 50, 63 mm0 1.0 to 0 400 bar2.5IP 65PM 01.0440, 50, 63 mm0 2.5 to 0 400 bar1.6 or 2.5IP 65PV 21.02100, 160 mm0 0.6 to 0 600 bar1.0IP 54PV 22.01
Application: Compressor213.40213.53232.30, 233.30Bourdon tube pressure gauge,forged brass case with liquidfillingBourdon tube pressuregauge, stainless steel casewith liquid fillingBourdon tube pressure gauge,stainless steel, safety version,without/with liquid fillingGLNominal size:Scale range:Accuracy class:Ingress protection:Data sheet:63, 100 mm0 0.6 to 0 1,000 bar1.0 (NS 100), 1.6 (NS 63)IP 65PM 02.06GLNominal size:Scale range: 0 1 to 0 400 bar (NS 50)50, 63, 100 mmAccuracy class:Ingress protection:Data sheet:1.0 (NS 100), 1.6 (NS 50, 63)IP 65PM 02.12 0 0.6 to 0 1,000 bar (NS 63, 100)Nominal size:Scale range:Accuracy class:Ingress protection:Data sheet:63, 100, 160 mm 0 1.0 to 0 1,000 bar (NS 63) 0 0.6 to 0 1;000 bar (NS 100) 0 0.6 to 0 1,600 bar (NS 160)1.0 (NS 100, 160), 1.6 (NS 63)IP 65PM 02.04232.50, 233.50732.18, 733.18PGT21Bourdon tube pressure gauge,stainless steel, without/withliquid fillingDifferential pressure gauge withBourdon tube, parallel entryBourdon tube pressure gaugewith electrical output signal,stainless steel caseNominal size:Scale range: 0 2.5 to 0 60 barAccuracy class:Ingress protection:Data sheet:1.6IP 65PM 07.03Nominal size:Scale range:Accuracy class:Ingress protection:Data sheet:GLNominal size:Scale range:Accuracy class:Ingress protection:Data sheet:63, 100, 160 mm 0 1.0 to 0 1,000 bar (NS 63) 0 0.6 to 0 1,000 bar (NS 100) 0 0.6 to 0 1,600 bar (NS 160)1.0/1.6 (NS 63)IP 65PM 02.02Further information at www.wika.com80, 100 mm -1 0 40 bar50, 63 mm0 1.6 to 0 400 bar1.6/2.5IP 65PV 11.0311
CompressorsTF44TR33Strap-on temperature sensorwith connecting cableResistance thermometer inminiature designMeasuring range:-50 200 CMeasuring element: Pt100, Pt1000, NTC, KTY Connecting lead from PVC,Feature:silicone Thermowell from aluminium Mounting on pipe surfacesData sheet:TE 67.14Sensor element:Measuring range:Output:Data sheet:TR40Cable resistance thermometerSensor element:Measuring range:Pin assignment:Cable:Data sheet:121 x Pt100, 2 x Pt100-200 600 C2-, 3- or 4-wirePVC, silicone, PTFETE 60.401 x Pt100, 1 x Pt1000-50 250 CPt100, Pt1000, 4 20 mATE 60.33
Application: CompressorTFS35TF35SC15Bimetal temperature switchOEM screw-in thermometer,with plug connectionExpansion thermometerwith micro switch, indicatingtemperature controllerSwitchingtemperature:Special feature:Measuring range:-50 250 CMeasuring element: Pt100, Pt1000, NTC, KTY High vibration resistanceSpecial feature: Compact design Plug connector for electricalconnectionData sheet:TE 67.10Nominal size:Scale range:Wetted parts:Option:Data sheet:40 200 C, fixed Compact design Automatic reset No capillary neededTV 35.01Data sheet:60, 80, 100 mm-100 400 CCopper alloy Square case version Sheet steel version Various contact versionsTV 28.02OLS-C04Optoelectronic OEM levelswitch, refrigerant version withtransistor outputMaterial:Process connection:Pressure:Temperature:Data sheet:Steel, nickel-plated; glassG 1/2", ½" NPTMax. 40 bar-40 100 CLM 31.34Further information at www.wika.com13
Liquid-cooled condensers/evaporatorsIn order to condense the gaseous, overheated refrigerant or to evaporate the liquid refrigerant one oftenuses liquid-cooled aggregates. Refrigerant pressure and temperature result, for example, from the coolanttemperature (in- and outlet), the surface of the aggregate and the volume of refrigerant that has to betransformed. As the surface of the aggregate is fixed, pressure and temperature are measured to monitorthe performance of the aggregates.WIKA offers all pressure and temperature measuringYou can of course use other products that have already beeninstruments are especially suited for applicationsthe lines of the refrigeration cycle.instruments needed for these applications. The followingon liquid-cooled condensers and evaporators.14mentioned above for monitoring pressure and temperature in732.5150Differential pressure gauge withdiaphragm, stainless steel, allwelded designBimetal thermometerStandard versionNominal size:Scale range:Accuracy class:Ingress protection:Data sheet:Nominal size:Scale range:Permissible operatingpressure at thermowell/stem:Wetted parts:Data sheet:100, 160 mm0 16 mbar to 0 25 bar1.6IP 54 (with liquid filling IP 65)PM 07.0563, 80, 100, 160 mm-30 200 CMax. 6 barCopper alloyTM 50.03
Application:Liquid-cooled condenser/evaporator5254Bimetal thermometer, industrialseries axial and radialBimetal thermometer, industrialseries, axial and radial,adjustable stem and dialGLNominal size:25, 33, 40, 50, 63, 80,100, 160 mmScale range:-30 50 to 0 500 CMaximum permissible operating pressure at thermowell/stem in bar: 25Wetted parts:Stainless steelData sheet:TM 52.01Nominal size:Scale range:Wetted parts:Option:5555 with 8xxTGT73Bimetal thermometer, axial andradial, adjustable stem and dialBimetal thermometer withswitch contacts, stainless steelintelliTHERM gas-actuatedthermometerData sheet:63, 80, 100, 160 mm-30 50 to 0 600 CStainless steelLiquid damping to max. 250 C(case and sensor)TM 54.01intelli THERMNominal size:Scale range:Wetted partsOption:Data sheet:63, 100, 160 mm-70 . 70 to 0 600 CStainless steelLiquid damping to max. 250 C(case and sensor)TM 55.01Further information at www.wika.comNominal size:Scale range:Wetted partsOption:Data sheet:100, 160 mm70 30 to 0 600 CStainless steelLiquid damping to max. 250 C(case and sensor)TV 25.01Nominal size:Scale range:Wetted parts:Option:Data sheet: 100, 160 mm-200 100 to 0 700 CStainless steel Capillary Liquid damping (case)TV 17.1015
Further applicationsAir channel/air-conditioning system48TR10-JTR60Bimetal thermometerThreaded resistancethermometer, with perforatedthermowellIndoor and outdoor resistancethermometerNominal size:Scale range:Wetted parts:Data sheet:Sensor element:Measuring range:Pin assignment:Process connection:Data sheet:Sensor element:Measuring range:Pin assignment:Process connection:Data sheet:63, 80, 100, 160 mm-30 120 CCopper alloyTM 48.011 x Pt100, 2 x Pt100-200 600 C2-, 3- or 4-wireMounting threadTE 60.10Pt100-40 80 C2-, 3- or 4-wireWall mountingTE 60.60Precision/test instruments16312.20TF40TF41Duct temperature sensorAmbient temperature sensorBourdon tube pressure gauge,test gauge seriesMeasuring range:-50 200 CMeasuring element: Pt100, Pt1000, NTC Smallest case design, UV-resistantFeature: Protected against dust and waterjets, IP 65 Plastic mounting flangeData sheet:TE 67.16Measuring range:40 100 CMeasuring element: Pt100, Pt1000, NTC Smallest case design, UV-resistantSpecial feature: Protected against dust and waterjets, IP 65 Clip-on sun protectorData sheet:TE 67.17Nominal size:Scale range:Accuracy class:Ingress protection:Data sheet:160 mm0 0.6 to 0 600 bar0.6IP 54PM 03.01
Further applicationsCold storesTF58, TF59TF-LCDTF45Expansion thermometer,standard versionLonglife digital thermometerOEM insertion thermometerwith connecting cableNominal size:Scale range:Wetted parts:Option:Measuring range:Special feature: Resistant to steam diffusionMeasuring range:Special feature:Power supply:Data sheet:Battery or solar poweredTE 85.01Data sheet:58 x 25 mm, 62 x 11 mm-50 . 250 CCopper alloy Vertical arrangement Special scales Other case materialsTM 80.02-40 120 C Extremely long service lifeTGT70Expansion thermometer,stainless steel versionintelliTHERM expansionthermometerintelli THERMNominal size:Scale range:Wetted parts:Option:Data sheet:63, 100, 160 mm-60 400 CStainless steel Liquid damping (case) with micro switch Indication accuracy class 1TM 81.01Further information at www.wika.comNominal size:Scale range:Wetted parts:Output signal:Option:Data sheet:silicone, PTFE With single or dual measuringelementData sheet:70-50 260 C Connecting lead from PVC, Thermowells from stainless steelTE 67.15 63, 100 mm-40 250 CStainless steel4.20 mA, 0.5.4.5V Capillary Other connection designsTV 18.0117
Air-handling technologyWIKA has developed ventilation and air-conditioning measuring instruments based onthe «Value Innovations» philosophy. The measuring instruments are primarily intended forinstallation in air-conditioning units (monoblocks). The pressure measuring instrumentscan be used, for example, for filter monitoring in accordance with the V/AC (ventilation andair-conditioning) directive.Further application areas are, amongst others, clean rooms,dust removal technology, extraction systems, emulsion mistseparators and gas scrubbers.Your benefits Easy to install and remove without tools Up to 50 % time saving during installation compared withconventional models Advanced design, optimised packaging for the targetmarket Extended guaranteeApplication examples air2guide18
Further applicationsA2G-10A2G-15A2G-50Differential pressure gaugeDifferential pressure gauge withelectrical output signalDifferential pressure transmitterNominal size:Measuring ranges:Nominal size:Measuring ranges:Measuring ranges:Ingress protection:Data sheet:110 mm 0 50 to 0 12,500 Pa -25 25 to -1,500 1,500 Pa others on requestIP 54 (optional IP 65)PM 07.40Ingress protection:Data sheet:110 mm 0 50 to 0 12,500 Pa -25 25 to -1,500 1,500 Pa 0 7,000 Pa standard -250 250 Pa others on requestIP 54 (optional IP 65)PV 17.40 0 2,500 Pa standard other measuring ranges adjustableIngress protection:Data sheet:via jumpersIP 54SP 69.03The range includes differential pressure measurement (mechanical andelectronic), inclined tube manometers and differential pressure switchesfor filter monitoring, and also differential pressure transmitters, mainly usedfor the monitoring of ventilators and blowers. Duct/immersion temperaturesensors and duct humidity and temperature sensors for measuringtemperature and relative humidity in heating, ventilation and air-conditioningsystems are used. The range is completed by measuring instruments formonitoring CO2 content and VOCs (volatile organic compounds).The brochure “Measuring instrumentsfor air-handling technology” shows youthe entire air2guide product family andtheir high technical specifications.www.air2guide.comFurther information at www.wika.com19
Calibration servicesOur calibration laboratory has been accredited for pressure since 1982 and for temperature since1992 in accordance with DIN EN ISO/IEC 17025. Since 2014, our calibration laboratory has also beenaccredited for the electrical measurement parameters DC current, DC voltage and DC resistance.From -1 8,000 barD-K-15105-01-00We calibrate your pressure measuring instrumentsquickly and precisely: in the range ( 8,000) bar using high-precision reference standards (pressurebalances) and working standards (precise electricalpressure measuring instruments) with an accuracy from (0.003 . 0.01) % of readingdepending on the pressure range in accordance with the directives DIN EN 837, DAkkS-DKD-R 6-, EURAMET cg-3 or EURAMET cg-17From -196 1,200 CD-K-15105-01-00We calibrate your temperature measuringinstruments quickly and precisely: in the range (-196 1,200) C in calibration baths, tube furnaces or at fixed pointsusing appropriate reference thermometers with an accuracy of 2 mK . 1.5 K depending ontemperature and the procedure in accordance with the appropriate DKD/DAkkS andEURAMET directives20
ServiceCT Service HotlineYou will receive information about calibrations in the WIKAlaboratory and on-site calibrations from our CT Service Team.Tel. 09372 132-5049 CTServiceteam@wika.comDC current, DC voltage and DC resistanceOnline servicesIf you would like to send your measuring instrumentfor calibration to the WIKA laboratory, please use ourproduct return form atwww.wika.com – Service – Product returnD-K-15105-01-00We calibrate your electrical measuring instrumentsquickly and precisely: DC current in the range 0 . 100 mA DC voltage in the range 0 . 100 V DC resistance in the range 0 Ω to 10 kΩ in accordance with the directives:VDI/VDE/DGQ/DKD 2622On-site calibrationD-K-15105-01-00In order to have the least possible impact on theproduction process, we offer you a time-saving, on-siteDAkkS calibration throughout Germany (measurementparameter pressure).We calibrate your pressure and temperaturemeasuring instruments quickly and precisely: in our calibration van or on your workbench with a DAkkS accreditation for pressure- in the range from (-1 . 8,000) bar- with accuracies between 0.025 % and0.1 % of full scale of the standard used 3.1 inspection certificates for the measurementparameter temperature from (-55 . 1,100) C21
Conversion factors for pressureSI units – Engineering units (based on the metre)SI unitsfrom/Engineering 869231 mbar10 869231 µbar10 -610 -30.11 Pa100.0111 kPa0.01101031 MPa10101061 mmHg1.333221.33322133.3221 mmWS98.066598.06651 mWS98.06651 kp/Engineering unitsSI unitsto· 10 -3· 10 -3· 10 -3· 10 -6· 10 -3· 10 -3· 10 -3· 10 .8066573.5561110096.78411 kp/0.9806650.98066598.066598.066598.0665735.5611 atm1.013251.01325101.325101.325101.325760· 10 -3· 10 -3· 10 -6· 10 -3· 10 -3mm2cm2-5· 103Corresponding pressureunits:1 Pa 1 N/m21 hPa 1 mbar1 mmHg 1 Torr1 kp/cm 1 at (atü)2· 103· 103· 10 6· 103· 1030.1· 10 -3· 103-31103· 10 -3· 103· 10 -6· 10 -3· 10 -6· 10 -6· 10 -3· 10 -3· 10 -3· 103· 10 -3· 103· 103· 10 -6· 10 -6· 10 -3-31031106103· 10 -9· 10 -9· 10 -6· 10 -3· 10 -610-610-3· 10 -6· 10 -6· 10 -3· 10 -3· 10 -3· 10 -6· 10 -6· 10 -3· 10 -3· 10 -6· 10 -310100.0110.96784110.332310.332310.33231.033231· 103· 103· 10 -3Comments:The table refers to DIN 1301 Part 1 (2002) and Part 3 (1979). According to the Regulation Implementing the Law on unitsof measurement (unit regulation - EinhV) of 13 December 1985, only the following units for pressure are allowed: pascal(Pa) bar (bar) millimetres of mercury (mmHg), however, only for blood pressure and the pressure of other body fluidsin medicine.The definitions and conversion factors in accordance with DIN 1301 apply for these units according to EinhV. In part 1 ofthis standard it is specified: pascal as a derived SI unit with a specific name and with a specific unit symbol bar as agenerally applicable unit outside SI millimetre of mercury as a unit outside SI with a limited scope of application.Part 3 of this standard defines, amongst other things, conversion factors for the following units: conventional millimetreof mercury (mmHg) conventional metre of water (mWS) Torr (Torr) technical atmosphere (at) standard atmosphere(atm).Pictures:Cover: Page 16:Bitzer Kühlmaschinenbau GmbHPage 10:Page 17:22Cmon - Fotolia.comKaeser Kompressoren GmbHiStockphoto.com
AppendicesSI units – Engineering units (based on the foot)SI unitsfrom/barmbarPakPaMPapsift H2Oin. H2Oin. Hgbar11031051000.114.5037733.4553401.46329.529981 mbar10 -311000.10.114.5037733.4553401.46329.529981 µbar10-61 Pa10-51 kPa0.011 MPa101 psiSI unitstoEngineering unitsEngineering units100.1-3· 10 -30.1· 10 -3· 10 -3· 10 -3· 10 -3· 10 -3· 10 45534.014630.2952998· 10 -6· 10 -6· 10 -6· 10 -60.0111010103110 -30.14503770.3345534.014630.29529981010 01 ft .88267091 in. 3.3333173.555911 in. 21.13292513.59511· 10 -3· 10 -3· 10 -3· 10 -3· 10 -3Corresponding pressureunits:-3· 103· 103· 103· 103-6· 10 -3· 103· 10 -3· 10 -3· 10 -3· 10 -3· 10 -3· 10 -3· 10 -3· 103· 10 -3· 10 -3· 103· 10 -3· 103· 10 -3Comments:The table refers to ISO 31-1: 1992 and ISO 31-3: 1992. For lengths ISO 31-1 defines conversion factors for units nolonger to be used: inch (in) foot (ft).1 psi 1 lbf/in.2For pressures, ISO 31-3 defines conversion factors
and calibration in all parts of refrigeration plants. Contents This brochure assists you in selecting the right instruments. Apart from the described products for refrigeration and air-conditioning applications, we offer a comprehensive stand-ard program for the measurement of pressure, temperature and level.
