Posts Tagged PDM

The Impact of Background Echoes on Ultrasonic Level Measurement

Photography is a pretty good way to illustrate the importance of background.

Look at the two photographs here. In one, the background is minimal, and focuses your eye on the subject matter. In the other, the background seriously detracts from the subject. Where should you be focusing? What’s most important?

Non-intrusive background makes focus point clear

Hard to discerne the difference between the action and all the stuff happening in the background

 

But unlike photography, where a good background helps you focus on the subject, in the world of non-contact ultrasonic level measurement, even a “good” background has a negative influence.  Background never contributes to a level reading, it only detracts. But Siemens has a built-in function to “cure” for the influence of backgrounds in their level devices. Read the rest of this entry »

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Getting Simatic PDM to run in Windows 7

PDM is Siemens’ Windows-based HART configuration tool.  My copy of PDM is a single point license that I use with a HART modem to configure field instruments using the “Lifelist” quick start app.

When I recently changed from Windows XP to Windows 7, the LifeList app would launch but the upload/download buttons were greyed out and it wouldn’t even attempt HART communication to field instruments.   Grrrrr, what to do? Read the rest of this entry »

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