Model MG101 - Panametrics Hygrometer Calibration System Datasheet

GESensingMG101PanametricsHygrometerCalibration SystemMG101 is a Panametrics product. Panametrics has joined other GE high-technology sensing businesses under a new name–GE Industrial, Sensing.gApplicationsPortable field calibration system for verifying moistureand humidity sensorsFeatures• Generates precise, repeatable levels of water vapor in a carrier gas• Generation range is -103°F to 50°F (–75°C to 10°C) frost/dew point (at typical ambient temperatures)• Accurate field calibration/verification of moisture sensors• No power required to operate• Requires dry nitrogen source gasThe MG101 hygrometer calibration system is used togenerate precise, repeatable levels of water vapor in acarrier gas stream. This primary dew/frost pointgeneration system achieves an accuracy of ±1.8°F (±1°C)within a continuously adjustable range.The MG101 employs the elementary principle of gas dilution. Dry gas is piped into the system, where it isdivided into two streams. One stream is saturated withwater vapor at a known temperature, while the otherstream remains dry (see flow schematic on next page).The two streams are then mixed. The saturated stream isdiluted with varying amounts of the dry gas to producethe desired gas/water vapor mixture.The MG101 employs either single stage or two stagedilution to generate a gas with a known waterconcentration in the dew/frost point range of -103°F(–75°C) up to 18°F (10°C) below ambient temperature.When generating frost points in the dry region, the waterconcentration of the carrier gas must be insignificantcompared to the final required mixture (one percent orless).The MG101 may be used to recalibrate or verify calibration of Panametrics aluminum oxide hygrometer probes. In addition, it may be used to generate an accurate, reproducible water concentrationin a gas for any purpose.GESensingGE SensingGenerated Dew/Frost Point Temperature Range–103°F to 50°F (–75°C up to 10°C) below ambient temperature (equivalent to 1.2 ppmv to 12,120 ppmv in gases at one atm at 68°F (20°C) ambient temperature)Accuracy±1.8°F (±1°C) dew/frost point temperatureInlet Gas SupplyNitrogen preferred, supply gas must be 45°F (25°C) drierthan driest dew/frost point temperature to be generatedMaximum Flow Rate0.42 SCFH (0.2 L/min)Pressure55 psig to 60 psig (4 bar to 5 bar)Outlet PressureAmbient to 10 psig (1 bar), adjustablePower RequirementsNoneDimensions (w x h x d)12 in x 18 in x 6 in.(304.8 mm x 457.2 mm x 152.4 mm)MG101SpecificationsMG101 with Moisture Image® Series 1 analyzer to demonstratemoisture sensor calibrationVent valveDry gas,first dilutionflowmeterDry gasinletPressureregulatorDry downvalve5: filterTempWet gasflowmeterSaturatorbottlesWet gas,diluted,flowmeterDry gas,seconddilutionflowmeterGas outletFlow schematicWeight (Dry)25 lb (11.3 kg)Inlet and Outlet Connections1/4 in Swagelok® tube fittingg©2005 GE. All rights reserved.920-018BAll specifications are subject to change for product improvement without notice.Moisture Image® is a registered trademark of GE. GE® is a registered trademark ofGeneral Electric Co. Other company or product names mentioned in thisdocument may be trademarks or registered trademarks of their respectivecompanies, which are not affiliated with GE.www.gesensing.com