Week #13: (4/13-17) 4-20mA Current Loops, Ch. 8 Analytical Instrumentation

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rjagodowski
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Week #13: (4/13-17) 4-20mA Current Loops, Ch. 8 Analytical Instrumentation

Post by rjagodowski » Sun Apr 19, 2020 9:02 pm

During the presentation of the Level Control discussion last week, there was a reference to a 4-20mA Current Loop (analog) sensor made. Today, we will spend some time discussing how these devices operate and why they have some advantages over analog voltage sensors. We'll use the following links:

Back to Basics: 4-20mA Current Loops. There is a 57 minutes seminar video on 4-20 mA Current Loops at the end of this link which you are encouraged to watch.

Here's a Wisc-Online video presentation showing an Ultra-Sonic Sensor with a 4-20 mA Output and how it is calibrated.

How to Make 4-20mA Current Loop Measurements.

How to Measure a 4-20mA Signal from Fluke Instruments.

We will then begin discussing Chapter 8 on Analytical Instrumentation with an emphasis on pH Measurement. Handouts may be downloaded here for Chapter 8.

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