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Proximity Monitors for shaft rotation measurements

Measuring and monitoring the vibration level of rotating machinery is a proven method of implementing safety measures thus enabling corrective action before the stress creates any damage.

SIL 2 vibration monitors from PCH support API 670 Eddy Current probes / Proximity probes for the monitoring of rotating shafts on turbines, rotary atomizers and general machinery equipped with sleeve bearings. All PCH Proximity Probe Monitors measure the dynamic vibrations as well as the GAP distance to target.

Using proximity probes as vibration sensors has a number of advantages:
  • No direct contact with the vibrating surface, thus ideal for moving targets
  • Measures shaft dynamic motion
  • Measures shaft static position, i.e. gap
  • Flat frequency response from DC to 5 kHz
  • Simple calibration
  • Suitable for harsh (industrial) environments

     

Proximity Probe Monitors

PCH 1072 Proximity Monitor (1-Ch)

PCH 1072 ProxThe PCH 1072 Mk2 can be configured for an API 670 proximity probe for surveillance of dynamic vibrations as well as for GAP measurements. Both the dynamic vibration signal as well as the actual GAP measurements can be delivered through 2 individual DC outputs to a central controller.
The monitor offers 4 relays freely configurable for vibrations and GAP alarms. For optimal adjustment of actual sensitivity and GAP detection on site the user software PCH Vibration Studio offers an integrated GAP calibration tool.

Features:
  • 1-1000 Hz Filter range
  • 0-2000 um Peak-to-Peak
  • GAP monitoring
  • 4 alarm relays for dynamic and static alarms
  • 2 analogue outputs 4-20 mA
  • System failure relay (OK Relay)
  • RS232/RS485 communication port

 

PCH 1420 Proximity Monitor (4-Ch)

PCH 1420The PCH 1420 is flexible and can be delivered with up to 4 API 670 proximity probe inputs, speed sensor input and a process input 4-20 mA or 0-10 VDC. The PCH 1420 can be factory configured for a combination of IEPE, API670 proximity probe, velocity probe or process inputs, making the vibration monitor ideal to meet special OEM requirements for a single and compact SIL 2 safety monitoring system.

The monitor offers 4 configurable outputs for either 4-20 mA or digital outputs as well as a redundant safety relay according to ISO/EN 13849-1.

Setup is easily done by the user software PCH Vibration Studio via USB or RS-485.

Features:
  • 4 inputs for proximity probes
  • 1 process input 4-20 mA/0-10VDC
  • 1 tacho input PNP/NPN/AC
  • 1-1000 Hz Filter range
  • 0-2000 um Peak-to-Peak
  • GAP monitoring
  • Configurable alarms for dynamic and static alarms
  • 4 configurable outputs 4-20 mA or digital relay drivers
  • System failure relay (OK Relay)
  • USB/RS485 communication port

PCH 1046 Proximity Monitor (4-Ch + 1)

PCH 1046The PCH 1046 is a proximity monitor with a high quality at an affordable cost. The monitor is targeted to be used for monitoring water, steam or gas turbines or any other type of machine needing on-line vibration monitoring based on proximity probes.
The monitor is equipped with 4 vibration channels with the capability of monitoring X,Y Smax and GAP. Furthermore it is equipped with optionally 1 extra channel for case expansion monitoring (Z). A trigger input is present for Off line orbit monitoring.
All parameter settings are made using the complementary Windows based software CHT 1024.
Included in this software are different visualization possibilities including Graphical ORBIT.
Features:
  • 4 inputs for dynamic proximity probes
  • 1 input for static proximity probe (axial displacement)
  • 1 tacho input PNP/NPN
  • 1-1000 Hz Filter range
  • 0-2000 um Peak-to-Peak
  • Smax measurement of X and Y direction according to VDI2059
  • GAP monitoring
  • Configurable alarms for dynamic and static alarms
  • 5 outputs 4-20 mA
  • 6 alarm relays with Make og Break function
  • System failure relay (OK Relay)
  • 5 BNC connectors with buffered output
  • RS232/RS485 communication port
     
Smax

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