PTC – Mathcad Electrical Engineering Library

Ideas, Design, Simulation, Emulation and Testing. The fundamentals are governed by Math. The parameters, the metrics, the limits, the specifications. All have to be taken into account, none overlooked.

More Meticulous and exhaustive the pre-processing is, the less errors and shocks we get at the end of the product design cycle.

I have had my share of jolts, the only reason being, i did not anticipate that jack in the design engineers design box. Remember Murphy is always looking.

Plan-Simulate-Proto-Pilot-Execute

Here is a tool Mathcad and a module for EE. That helps us in our design goals. Standard calculation procedures, formulae and reference tables used by electrical engineers.

Electrical & Electronic Engineering from Hicks’ Adapted from the Standard Handbook of Engineering Calculations (edited by Tyler G. Hicks).

PTC – Mathcad – Engineering Calculations Software

Electrical Engineering Library - Mathcad

You will need to Login to Get to the EE Library of MathCAD

Interface a PC to Measure or Control Temperature

How to Use Your PC to Measure Temperature

Thermocouple, RTD, Temperature monitoring is central to the majority of data acquisition systems, be it to save energy costs, increase safety, reduce testing time…whatever your reasons, you will need a device to measure the temperature – a temperature sensor.

How to Use Your PC to Measure Temperature

Thermocouples, resistance temperature devices (RTDs), thermistors and infrared thermometers are all types of temperature sensor. Which you choose depends on factors like your expected maximum and minimum temperatures, the accuracy you need and your environmental conditions.

752-RTD: RTD Resistance Temperature Measurement, Digital I/O, Counting, Analog Output

  • Measure temperature using RTDs or Pt100 sensors, and voltage signals
  • With extra hardware monitor thermocouples and strain gauge bridges
  • Includes the powerful yet easy-to-use Windmill software for Windows: no programming required
  • Connect up to 8 USB units to one PC

Here is a way you can learn, How To Interface PC to the Outside World.

Temperature Control with a PC

This is a project that will help students learn both hardware and software aspects of a control system. Here you can test out an automation program on a PC with minimum external hardware.

When you implement in the field, the system has to be a dedicated real time uC based product on custom firmware. Systems with OS + Software combination are not known to be reliable in Process Control. But OS + Software is good for Supervisory Systems which get their data from Real Time Controllers.

So a front end controller must be Rugged, Non-PC based and Non-OS based unit. This means use something like Arduino. With a Robust and Compact (means fast) firmware.

The firmware should be Polling or Interrupt based but with both internal and external watchdog. Most important a Power supply Management that resets system properly over Brown-outs and Black-outs. Even today some Embedded Systems i have to turn off and on after power resumes.

Don’t Forget, Multiple Watch Dogs and Multiple Power Management for graceful start of system !! Use one big SuperCap if you want. Else people will go back to Thermostats.

Instrumentation for Process Control

A Resource of Value for Industrial Engineering. Here is an Online Textbook for learning advanced process control concepts.

The Process Control Education Web Site

Industrial Automation enables Higher skill levels for workers and reduces danger of accidents too. Now the emphasis is for Energy Efficient Industrial Production, not only to save Energy Costs but as a Social Responsibility.

Industries should not pollute water bodies and the atmosphere, this brings us to new process control area of Air and Water Quality Measurement and regulation.

The Reference includes Sample Process Control Course, Instrumentation for Process Control, WEB-Based Educational Resources for Process Control and Process Operability.

The Process Control Education Web Site

The material above can also be found on the -Process Control, 2nd Edition, McGraw-Hill, 2000 – ISBN 0-07-039362-1 a textbook by T. Marlin.

Process Control Instrumentation – McShane

New serial interface RS-422 improved upon RS-232 serial communications which was Noise prone. RS-422 uses two signal lines.

RS-485 enhances RS-422 with an ability to connect upto 32 devices. Now we have Industrial Interface methods like Zigbee, Ethernet, Modbus etc.

RS-485 Serial Interface – McShane, Inc.

Temperature Controller for DC Load and TEC

Temperature Controller for DC Load and TEC

Model 5C7-582 or Model 5C7-583 temperature controllers provide automatic biphase heating and cooling control for Thermoelectric (Peltier effect, or TEC) modules.

More about the Company

Founded by Philip Johnson in 1964, McShane, Inc. supplies process control equipment, OEM devices, and industry services from our location south of Cleveland, Ohio.

They also provide services like Leading Edge Custom Built Designs, Prototyping and Manufacturing.

McShane, Inc.
3633 Trails End Dr., Medina, Ohio, 44256-8770, United States.