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  • Introduction to Flow Meters
    , pipe liners can cause problems (ultrasonic), or the meter may stop functioning if the Reynolds number is too low (in vortex shedding meters, RD > 20,000 is required). In view of these considerations, mass flowmeters, which are insensitive to density, pressure and viscosity variations
  • Selection and Calibration of a Turbine Flow Meter (.pdf)
    , or water. Water is a standard calibration media that many flow meter. manufactures use. The media is low cost, easy to work with, none hazardous. and easy to dispose of. Applying the turbine in an operating viscosity different. from what the meter was calibrated at will create an offset in the calibration
  • Using the SLMS Output of the ECOLEC Series 100 Meters (.pdf)
    of the ECOLEC Series 100 Meters. V. Maximum repetition rate is 11 seconds at 360V and 90A. Fall time. Rise time. ±3uS. ±30uS. ±2.4V. t. 100mS. Figure 2. Consumption pulse output timing diagram. The pulse output of the meter is a low power, active low pulse referenced to the Neutral signal. The signal
  • Piezoelectric Measurement System Comparison: Charge Mode vs. Low Impedance Voltage Mode (LIVM)
    piezoelectric elements. Charge mode accelerometers used for vibration measurements utilize piezo-ceramic materials from the Lead Zirconium Titanate (PZT) family. These materials are characterized by high charge output, high internal capacitance, relatively low insulation resistance and good stability
  • Optical Metrology for Large Telescope Optics
    the phase data. Vibration isolation and airflow control systems of this scale can prove prohibi-. tively expensive or functionally impractical. A third difficulty arises when measuring space-based hardware under actual-use conditions, at extremely low. pressure and/or cryogenic temperatures
  • VibroBlock(R) Systems, Some Basic Concepts
    continues monitoring vibration and making small adjustments in power. output to keep vibration constant. This is very similar to cruise control in a car. VBC 2000/2500. Transducer Function: As the transducer vibrates, it produces a low voltage sine wave signal whose peaks. correspond to acceleration
  • Introduction to Charge Mode Accelerometers
    Dytran charge mode accelerometers are designed to measure shock and vibration phenomena over a broad temperature range. These accelerometers, unlike the Low Impedance Voltage Mode (LIVM) types, contain no built-in amplifiers. Dytran's charge mode accelerometers utilize high sensitivity piezoceramic
  • Measuring Length and Rate Using Quadrature for an Oil Drilling Operation
    Quadrature. cally based on direction, whether caused Laurel L80112QD quadrature meters. by vibration or true movement. One of the meters was programmed to. read out depth in feet, the other to read. A. The Laurel L80102QD quadrature meter out drilling rate in feet per hour. Low and. was chosen

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