Reciprocating Machinery Protector (RMP)

FOR MONITORING RECIPROCATING COMPRESSORS AND OTHER RECIPROCATING MACHINERY

Reciprocating machinery faults typically manifest themselves as high frequency, high amplitude impacts. While simple to integrate with PLCs for continuous monitoring, standard vibration transmitters with a current output aren’t ideal for identifying their impacts because, in the conversion of AC voltage to DC voltage via the RMS process, signal peaks are smoothed out and have little effect on the resulting overall vibration level. By the time that a vibration transmitter would signal a problem, equipment damage would have already occurred.

The patented Reciprocating Machinery Protector (US Patent No. 7, 171, 313) offers the best of both worlds by providing a 4-20 mA current output that is reflective of the number of high-frequency, high-amplitude impacts occurring. The output is calculated bycounting the number of short, high-amplitude impacts, comparing them to field-adjustable vibration threshold levels and weighting them accordingly. This process allows the resulting output to indicate a problem and prompt a technician to take corrective measures before the fault becomes catastrophic.

  • Outperforms impact transmitters by providing earlier warnings of mechanical looseness and faults, including loose/broken bolts/rod nuts, cracked rods and cylinder debris.
  • Provides peak acceleration output signal when no impacts are detected above the threshold levels.
  • Counts impacts based on two threshold levels with their own independent weightings.
  • Incorporates dead time after initial impact where peaks are not counted to prevent false counts.
  • Offers electronically-configurable time window, peak acceleration range, threshold levels and weightings.
  • Program with optional USB programmer kit (Model 600A35).

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Model Number

Model:649A01

  • Output: 4-20 mA
  • Output: 4-20 mA
  • Machinery RPM Range: 240 to 10000 cpm
  • Machinery RPM Range: 4 to 166 Hz
  • Temperature Range: -40 to 212 °F
  • Temperature Range: -40 to 100 °C
  • Excitation Voltage: 15 to 30 VDC
  • Excitation Voltage: 15 to 30 VDC
$825.00 USD
(Pricing valid in US only)
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Model Number

Model:EX649A01

  • Output: 4-20 mA
  • Output: 4-20 mA
  • Machinery RPM Range: 240 to 10000 cpm
  • Machinery RPM Range: 4 to 166 Hz
  • Temperature Range: -40 to 212 °F
  • Temperature Range: -40 to 100 °C
  • Excitation Voltage: 15 to 30 VDC
  • Excitation Voltage: 15 to 30 VDC
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Model Number

Model:EX649A71

  • Output: 4-20 mA
  • Output: 4-20 mA
  • Machinery RPM Range: 240 to 10000 cpm
  • Machinery RPM Range: 4 to 166 Hz
  • Temperature Range: -40 to 212 °F
  • Temperature Range: -40 to 100 °C
  • Excitation Voltage: 15 to 30 VDC
  • Excitation Voltage: 15 to 30 VDC
$945.00 USD
(Pricing valid in US only)
DatasheetAdd to Cart

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