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Special Scales Special calibrations can be performedby Lake Monitors to correct for the following system characteristics: If a Lake monitor is installed in asystem where conditions differ from the standard listed above, correc- tion factors will need to be applied to retain the design accuracy of the monitor. The appropriate correc- tion factor equations are detailed in Chart on the back of this page. To assure the best monitoring accura- cy, pressure and temperature meas- urements should be taken directly at the monitors inlet port. Lake products are designed forpneumatic systems where pressures between - PSIG are used. In these common applications, a Lake monitor with a standard calibra- tion can be read directly without applying corrections. Correction Factors Standard Cubic Feet Lakes monitors are calibrated tomeasure the flow of compressible media gases in SCFM – standard cubic feet per minute. A standard cubic foot is defined as a cubic foot of dry air at standard atmospheric conditions: 0F and 4. PSIA 0 PSIG measured at sea level. When a standard cubic foot of air iscompressed, its actual volume will decrease proportionally as absolute pressure increases. For example, a standard cubic foot of airs actual volume will decrease by 50% and density will increase by 00% as the air is compressed from atmospheric pressure 4. PSIA 0 PSIG to 2.4 PSIA 4. PSIG. See FIGURE on back.There are three factors that affectthe Flow Meter Calibration: specific gravity, pressure and temperature. Lake Monitors are calibrated for airspecific gravity of .0 at 0F and00 PSIG. Most low pressurerotameters are calibrated at 0 PSIG and require corrections for use at any other pressure.

Lake Monitors Brand Catalog - 13569 Lake MonitorsPneuatic Monitor ses and Oeratin Teor Lake Monitors Pneuatic Monitor ses and Oeratin Teor

Lakes rugged, high pressure, pneumatic monitors are designed for permanent installation in com- pressed gas systems. These products provide a low cost means to meas- ure compressor volumetric outputs, pneumatic tool consumptions and other industrial gas flow rates.Lake Monitors operate using thevariable annular orifice method with compression spring return – the identical method used in our field proven liquid flow rate moni- tors. The products follower, where the measurement is indicated, is magnetically coupled through a high pressure casing to the moni- tors internal orifice assembly.Benefits of these design featuresare:
â—† ig operating pressure
â—† linear displacement of te follower wit respect to flow rate
â—† ig turn-down ratios
â—† measuring accuracy witin ±4% of full-scale
â—† system pressure
â—† system temperature Lake Monitors are available in threestandard materials of construction:
â—† operation in any mounting orientation
â—† media specific graity
â—† arious measuring units i.e.PM PS mr etc.
â—† aluminum for standard moni- toring applications to PSIG
â—† any combination of te aboe Consult Lakes factory or your distributor for details and prices.
â—† brass for mediamaterial com- patibility Selecting the Proper Monitor
â—† stainless steel for compatibility and operation to PSIG. Measuring ranges cover .5-2SCFM through 50-00 SCFM. Twenty-four port sizes from / through 2 in NPT, SAE and BSP can be ordered to meet specificplumbing requirements.Lakespneumatic monitors are also avail- able in alarm and transmitter con- figurations for electronic monitor- ing applications. To order a pneumatic flow ratemonitor the following information is required: â—† pipe size and port style â—† â—† media air nitrogen argonetc. for material compatibil- ity and specific graity consid- erations approximate flow rangerequired â—† system pressure: nominalmaximum minimum â—† system temperature

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