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18 Cards in this Set
- Front
- Back
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What is a Tachometer?
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An instrument that generates a measurement of rotational speed (RPM)
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Where would you verify a tachometer reading to?
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Machine's Nameplate Data
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What info will you find on a Calabration Sticker?
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Last Calibration Date and Calibration Due Date
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Chrometric Tachometer
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-Obtains RPM's from an accesible shaft
-Spindle tip on shaft, press and release start button -Displays reading after 5 seconds |
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Centrifugal Tachometer
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Gives a continuous reading of RPM's on an accessible shaft
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Resonant Tachometer
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-Vibrating Reed Tach when shaft is NOT accessible
-indicated by calibration reeds -Obtain RPM by holding agianst housing |
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Photo-electric Tachometer
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-Battery operated
-Non-contact Tach w/ continous indication of RPM -Place refelctive tape on shaft |
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How to calculate Frequency (Hz)
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(# of poles x RPM) / 120
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Advantages of 4-20mA Transducers
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-Voltage is prone to interferance
-Easily manipilated -Signal can be transmitted over longer distances |
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What do you do before trouble shooting a transducer?
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Be sure Transducer is the problem.
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What gas does the Kings Nutronics use?
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Nitorgen
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When replacing a transducer, what range can you install?
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One with the same type of range OR higher.
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What letters represent Wind Direction?
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HD
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What letters represent Wind Speed?
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HE
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Wind Direction and the Ships Indicator are relative to the ships ___ and ___?
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heading and speed
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What are the power requirements for an anemomter (wind vane)?
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115VAC, 60Hz
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What is the purpose of a capacitor on a wind and speed indicator?
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-prevents RF interference
-reduces stator currents |
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What is a Wind Speed Indicator?
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Electrical device that gives constant visual indication of wind sped and direction.
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