Seismic Vibration

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Seismic Vibration
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Seismic Vibration Outline

• What is Seismic Vibration?
• How do you measure Seismic Vibration?
• When do you measure Seismic Vibration?
• Why do you need to measure Seismic Vibration?
• Seismic Sensors
• Seismic Transmitters
• Seismic Switches
• Seismic Vibration Monitoring

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What is Seismic Vibration?
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What is Seismic Vibration?

• Of, subject to, or caused by an earthquake or
  earth vibration
• Earthshaking
• lacking stability or fixity or firmness
• of enormous proportions or having highly
  significant consequences
• Basically nothing good

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What is Seismic Vibration Contd

• In our field Seismic vibration has to do with the
  case vibration of a machine
• Not the actual earth vibration

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How do you measure Seismic Vibration?

• Acceleration
• Change of velocity over time
• Units g
• Velocity
• Distance travelled per unit time
• mm/s or ips(inches per second)
• Displacement
• Change of position
• um or mil

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How do you measure Seismic Vibration?

• Accelerometers
• Ex TM0782A
• Velocity Sensors
• Ex TM0793V
• Displacement Sensor
• Ex TM079VD

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When do you measure Seismic Vibration?

• Use for measure absolute vibration bearing at
  bearing point
• Bearing or housing vibration

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Why do you need to measure Seismic Vibration?

• To detect occurring or developing problems due to
  machinery imbalance, misalignment, looseness,
  rolling-element bearing failure, gear defects, etc

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Seismic Sensors

• Accelerometers
• TM0782A
• Accelerometer with Integral Cable TM0783A
• Low Power TM0784A
• Hi-Temp. TM0785A
• Side-Exit TM0786A
• Ultra-Hi Temp TM0787A

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Seismic Sensors

• Velocity Sensors
• TM0793V
• Side-Exit TM0796V
• Explosion Proof TM016-793
• Low Frequency Velocity/ Displacement TM079VD

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Seismic Transmitters

• TR1101
• Measures machinery case vibration
• 3-Wire Transmitter
• 4-20mA output in acceleration, velocity or
  displacement
• TM016
• 2-Wire Looped Powered Transmitter
• 4-20mA output in acceleration or velocity

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Seismic Switches

• PT580
• Digital Vibration Switch
• Acceleration and Velocity
• 4-20mA output
• VS102
• Electronic Vibration Switch
• Velocity
• 4-20mA output
• PT500
• Mechanical Vibration Switch
• Acceleration

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Seismic Vibration Monitoring

• DTM 20
• DM200
• PT2060