EPRO A6125 Dual-channel Case Piezoelectric Vibration Monitor

Introduction

The EPRO A6125 Case Piezoelectric Vibration Monitor is designed for high reliability for your plant’s most critical rotating machinery monitoring case vibration from accelerometer sensors. This 1-slot monitor is used together with other CSI 6500 monitors to build a complete API 670 machinery protection monitor. Applications include steam, gas, compressors and hydro turbo machinery.

Main Functionality

The main functionality of the Case Peizoelectric Vibration Monitor is to accurately monitor case vibration and reliably protect machinery by comparing vibration parameters against alarm setpoints, driving alarms and relays.

Case Piezoelectric Vibration Sensors

Case piezoelectric vibration sensors, sometimes called case absolute (not to be confused with shaft absolute), are accelerometers, or velometers, with the output in acceleration or velocity. The case vibration monitor provides vibration monitoring for the bearing case in g’s acceleration or velocity, mm/sec (in/sec). Since the sensor is mounted on the case, the resultant vibration of the case can be influenced by many different sources including rotor movement, foundation and case stiffness, blade vibration, adjacent machines, etc.

Replacing Field Sensors

When replacing field sensors, many seismic sensors are being replaced with piezoelectric-type. The 6125 monitor is designed for the newer piezoelectric style sensors.

Applications

Case measurements are common in nuclear power applications. Case measurements with piezoelectric sensors are also common for rolling element bearing machines and gearboxes. Emerson recommends the piezoelectric sensor and piezoelectric sensor monitor for use when updating both field sensors and monitors.

Integration with PlantWeb and AMS Suite

The CSI 6500 is an integral part of PlantWeb® and AMS Suite. PlantWeb provides operations integrated machinery health combined with the Ovation® and DeltaV™ process control system. AMS Suite provides maintenance personnel advanced predictive and performance diagnostic tools to confidently and accurately determine machine malfunctions early.

Transducer Inputs：

Transducer Inputs
Number of Inputs	Two, independent, differential inputs
Type of Inputs	Piezoelectric (accelerometer or velometer)
Input Resistance	>100 kΩ
Input Voltage Range	-5 to +15 VDC
Signal Input Voltage Range	6125/00311 – 9500 mV peak to peak
Signal Input Voltage Range	6125/10 16 – 450 mV peak to peak (special high temperature sensor)

Specifications：

• Module Type: Two-channel, 3U size, 1 slot plug-in module.
  • Reduces cabinet space requirements by half compared to traditional four-channel 6U size cards.
• Compliance: API 670 compliant.
  • Hot swappable module for easy replacement.
• Remote Features:
  • Remote selectable limit multiply and trip bypass.
• Output Options:
  • Front and rear buffered outputs.
  • Proportional outputs.
  • 0/4-20 mA output.
  • 0 – 10 V output.
• Self-Checking Facilities:
  • Includes monitoring hardware.
  • Monitors power input.
  • Monitors hardware temperature.
  • Monitors sensor and cable health.
• Compatibility:
  • Designed for use with piezoelectric accelerometers and velometer sensors.

More Specifications

 

Please read online or download PDF：specifications-sheet-protection-cards-for-ams-6500-classic-systems-en-1736178

For more CSI 6500 Monitors: