PC420 Loop Powered Sensors Outputs 4-20 mA Loop powered RMS, Peak, True Peak Optional temperature sensor iT Series Modular Transmitters and Alarms Accepts dynamic signal Outputs 4-20 mA and dynamic signal Selectable filtering Optional Alarm/Relay module

Introduction

Machinery vibration and the resulting signals from accelerometers oscillate too quickly for PLC and DCS systems which digitize signals at a slow rate.  The dynamic accelerometer signal must first be converted to a signal that changes more slowly but still represents the amplitude of the vibration such as RMS or Peak level.  It is then converted from a voltage level to a current level which is the common method of transmitting signal information in industrial applications.  The current is between 4 and 20 mA corresponding with the lowest and highest vibration levels set in the instrumentation.

PC420 LPS Sensors

Wilcoxon Research loop powered sensors (LPS™) are an accelerometer and vibration transmitter in one industrial housing.  LPS™ provide a 4-20 mA output signal proportional to the overall vibration level. 4-20 mA sensor output is commonly accepted by process control systems such as programmable logic controllers (PLC) or distributed control systems (DCS) for the most cost effective continuous vibration monitoring.

If you already have a process control system that accepts 4-20 mA inputs - like a PLC or DCS network - you are already taking data points on pressure, temperature, or maybe flow. Now you can send vibration data to your PLC or DCS as well. By connecting into process control systems, you are able to perform predictive maintenance on machinery without the investment and learning curve associated with traditional vibration monitoring systems with data collection boxes and custom software.

The LPS™ Series is ideal for industrial, commercial, and municipal facilities that all benefit from condition based monitoring and predictive maintenance programs. If physical plant assets are doing the work to process a product, then increases in productivity and efficiency can be realized with a continuous online machinery health monitoring program. Some of the most common processes to benefit from the 4-20 mA vibration sensors are pharmaceutical, food and beverage, brewing, water and waste water, petrochemical, pulp and paper, and power generation facilities. The LPS™ Series is effective for vibration monitoring of pumps, motors, fans, cooling towers, compressors, and gear boxes. Applying predictive maintenance techniques to these operations and machines can result in significant maintenance expense reductions.

More information: Wilcoxon Webpage

iT Series Modular Transmitter and Alarm

The Intelligent Transmitter Series of 4-20 mA vibration transmitters, vibration alarms, and communication modules can be used to implement low-cost online vibration monitoring and simplified machinery monitoring and alarming.

The Intelligent Transmitter (iT) Series is a complete family of 4-20 mA units that provide signal conditioning for simplified online vibration monitoring and provide a Total Lower Cost approach to continuous monitoring. The iT Series includes the iT transmitter, iT Alarm and iT Communication Module.

The iT Series is ideal for industrial, commercial, and municipal facilities that all benefit from condition based monitoring and predictive maintenance programs. If physical plant assets are doing the work to process a product, then increases in productivity and efficiency can be realized with a continuous online machinery health monitoring program. The 4-20 mA output can be sent directly to the facility’s existing PLC or DCS for the most cost effective continuous vibration monitoring.

Some of the most common processes to benefit from the iT Series are pharmaceutical, food and beverage, brewing, water and waste water, petrochemical, pulp and paper, and power generation facilities. The iT Series is effective for 4-20 mA vibration monitoring of pumps, motors, fans, cooling towers, compressors, and gear boxes. Applying predictive maintenance techniques to these operations and machines can result in significant maintenance expense reductions.

Moreover, trending of the overall vibration level does not require any sophisticated analysis skills. Observing a sustained increase in overall vibration usually provides enough evidence to warrant a more detailed inspection of the machine.

More information: Wilcoxon Webpage