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New Generation Signal Conditioning - What's changed?

So what is new about new generation signal conditioning? Well less is more!

Signal Conditioning has been around since the dawn of instrumentation and the requirement of taking measurements in the process plant. Many measurement issues have been dealt with over the years with standardization for the sake of improved consistency, reliability and compatibility.  Performance issues like Sensitivity, Accuracy, Lineararity and Resolution are all givens in today's signal conditioning instrumentation.

 

The less is more requirements.

OMNIFLEX offers a wide range of signal conditioning capability in a surprisingly small range of products.

This is the direct result of the attention paid to lowering the cost of ownership of your signal conditioning.

At a quick glance, most signal conditioning modules look the same. But if you are going to choose a product range you need to consider these factors:

  • Installation Costs
  • Spares Stock Holding
  • Re-calibration Costs
  • Reliability
  • Plant Safety

 

Each of these factors has been taken into account in the design of the OMNITERM �B� series range. Select a solution from the following product groupings to meet your performance and budget requirements:

Loop Isolators

This is a typical challenge that relates to all plants no matter how old or new. The elimination of ground loops in your analogue 4-20mA signal loops is the key to reliable and accurate measurements. Loop Powered isolators simplify the wiring since they are simply inserted directly into the current loop. There are OMNITERM products can solve these system problems, whether you just need to isolate a transmitter from its power source, boost an overloaded loop, or whether you need to split the loop into two for the addition of data acquisition or monitoring.

 

Loop Splitters

A common condition on the modern plant is the requirement for more process information for improved control. This often means that signal conditioning system need to be shared by supervisory and control applications. Adding more devices in a current loop often leads to problems with isolation and loading of the loop. The loop splitter converts one current loop into two fully independently isolated loops. Each output loop is independent of the other for example shorting one loop has no effect on the other.

 

Signal Transmitters

The latest conversion technology combined with full software configurability makes these OMNITERM products the most accurate and versatile in their class. Universal Inputs ensures Installation cost are down, Spares Holding is down, recalibration costs are down. These savings are never insignificant.

 A single universal transmitter is capable of accommodating the following signal options:

Inputs:

- Thermocouples

- Resistance (RTDs)

- milliVolts

- dc voltage

- dc current

Outputs:

- dc Voltage (bipolar)

- dc Current (bipolar)

- Pulses Out (Linear Integration)

Other Transmitter Units cover :

  • ac voltage
  • ac current
  • Frequency

Limit Alarms /Trip Amplifiers

A range of alarm modules are available from simple limit alarms with manually adjustable set-points to software configurable units capable of rate-of-change alarming direct from the sensor input. The sophistication of the SCADA and control systems are migrating to field signal condition devices.

Rate of change Alarms

A unique feature is the ability to impliment an alarm or trip for rate of change for special applications where a process require transitions to be monitored eg Rapid temperature rise or fall, Rapid Pressure change providing a saftety interlock if process control is lost.

Computation

It's a well accepted fact that most computation is done on a SCADA, PLC or DCS on the plant, however when you have a few analogue signals that require manipulation or computation the ideal solution is to process those signals directly in the plant. These modules are designed to solve those tricky special functions required in certain processes, where the sensors require to be conditioned according to a more complex mathematical formula. Available functions include deviation, addition, subtraction, multiplication, linearization, rate-of change, peak, valley, ratio, track-and-hold, etc.

 Safety Systems - IEC61508

IEC61508 is a standard being adopted for many industries and the requirements are such that the individual components of a system need to be analysed for compliance within the context of the safety system and its safety life cycle. The Omniterm B series are compliant with a SIL 1 Rating making them easy to apply in safety critical applications saving time in the Haz Ops study phase of a project.

 

 

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For further information on this press release please contact sales@omniflex.com