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Digital Compensation

Digital compensation is the process of collecting many measured points at different pressures and temperatures and using this data to correct the output of a pressure transducer so that the pressure accuracy and thermal errors can be improved beyond what is practically achieved with analogue compensation.

Digital Compensation 3D Error Mapping

There are mainly two types of digital compensation:

The first method which is often referred to as a “look-up table” stores all the measured points in the digital memory of the sensor and they are recalled when required to compensate the pressure reading. The software extrapolates between measured points so that every pressure reading can be digitally characterised. The more measurements that are stored the more accurate is the extrapolation and thus the overall accuracy.

Digital Compensation Circuit

The second method is to mathematically analyse the data to define a mathematical formula called a “Polynomial” which best matches the unique characteristic behaviour of a particular pressure transducer. The equation constants are then stored in the digital memory of the sensor and each pressure reading is compensated by applying the mathematical formula.

The first method consumes more memory storage and less processing power while the second method requires much less memory storage but much faster processing power.

Featured high accuracy measurement products

  • ADT681 Digital Pressure Gauge
  • High Accuracy and Precision, Voltage Signal Output Pressure Transducers
  • High Accuracy Digital Interface Pressure Sensors
  • High Accuracy DP Sensors

Glossary of Pressure Sensor technical terms

  • Ceramic Pressure Sensors
  • Dry Cell
  • Dry/Dry
  • HART®
  • Isolation Diaphragm
  • LVDT – Linear Variable Differential Transformer
  • Pressure Sensors
  • SOI – Silicon on Insulator
  • Stainless Steel Pressure Sensors
  • Static Line Pressure
  • Wet/Dry
  • Wet/Wet

Help from Pressure Sensor resources

  • Transforming a 2 wire Current Loop into a Voltage Output Signal
  • Measuring vacuum as a negative gauge pressure using a dp sensor
  • How do you measure flow rate with a dp cell
  • How do you choose the correct pressure range for a pressure sensor
  • Pressure Sensor Accuracy Specifications
  • Supply voltage and load resistance considerations for pressure transmitters
  • Symptons and Causes of Damage to Pressure Transducer Diaphragms
  • How to Connect a 4-20mA Current Loop Pressure Transmitter
  • What is difference between working, burst and over pressure
  • Measuring liquid level in a tank using a dp sensor
  • Measuring density of a liquid using a dp sensor
  • Pressure Sensor Technology Comparative Guide

Guidance with Pressure Sensor requirements

  • ASL Low Cost Miniature Pressure Transducer Pressure Transducers

Tools for Pressure Sensor calculations

  • Pressure Sensor Calculator
  • DP Flow Transmitter Output Calculator

Primary Sidebar

Pressure Sensor Specifier

Specify a pressure sensor

Select your pressure sensor requirements

Pressure Sensor Calculator

Calculate errors and readings for a pressure sensor
Enter your parameters into this pressure sensor calculator to determine calibration errors, expected readings, and error tolerances

Pressure Sensor Technology Guide

Rating table for performance of different pressure sensor technology types

Compare performance of the most popular pressure sensor technology types and how they rate for different application requirements

USB Pressure Sensor & Logging Kit

Record pressure at a high sample rate of up to 1kHz using this USB pressure sensor and logging kit with your computer

Record pressure at a high sample rate of up to 1kHz using this USB Pressure Sensor and Logging Kit with your computer

Products

  • Pressure
  • Level
  • Temperature
  • Interfacing
  • Datalogging
  • Calibration
  • Wireless

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