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?
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 »
Auto False echo suppression, auto TVT, commissioning, Configuration, echo suppression, false echo suppression, leven measurement, liquid level, measuring liquid level, milltronics, milltronics level, P837, P838, PDM, science, Siemens ultrasonic, simatic pdm, start-up, technology, time-varying threshold, TVT, TVT curve, ultrasonic level, ultrasonic level measurement
People who have used Milltronics or Siemens ultrasonic continuous level measurement systems are used to the way configuration is done. It’s not uncommon that when they start up their first Siemens radar transmitter they encounter a stumbling block – the 4-20mA output doesn’t respond correctly.
The radar will start up and run, and if the tank level is low, they’ll get a valid level reading on the transmitter’s display, but the 4-20mA will be incorrect (too high a percentage). Or, if the tank level is at a medium or high level, both the indicated level in the display and the output will be maxed out at 20mA. It’s a misunderstanding about where the span measurement starts from. Read the rest of this entry »
20 mA, 4-20 mA, 4mA, calibrating echomax sensor, calibrating Siemens radar, calibrating Siemens ultrasonics, commissioning, Configuration, lower range value, LRV, radar level, span, span calibration, ultrasonic level, upper range value, URV, zero calibration
It’s a common question that doesn’t come with a straightforward answer. Our customers make a significant investment in instrumentation, so if something can be repaired, it’s usually easier to get past the budget department. But there are several factors to consider first. Read the rest of this entry »
best practices, commissioning, Installation, instrumentation repairs, instrumentation upgrade, process instruments, repair, repair process instruments, replace, replace process instruments, service or upgrade, troubleshooting