Setra Blog

Master the Basics With HVAC Terminology

Absolute Pressure — Pressure measured relative to full vacuum. Referred to as pounds per square inch absolute (PSIA).

Atmospheric Pressure — Pressure of the atmosphere at the earth’s surface NIST standard atmospheric pressure = 1.01325 bar.

BAR — Unit of pressure (or stress). 1 bar = 750.07 mm of mercury at 0°C, at 45°.

Look no further than the recent Ebola case in the US to understand that one of the greatest fears in the general population is the rapid spread of infectious disease. When infectious diseases such as Ebola and MERS make an appearance, they immediately become front page news and are featured by every media outlet across America. 

While there are many strategies employed to prevent these infectious diseases from becoming a

The MicroCal™ automated pressure calibrator is used as a stand-alone calibration standard for differential and gauge pressure sensors found in critical environments. Setra partnered with NASA to develop the industry’s quickest and most stable pressure control for low range applications. The Micro-Cal™ combines precise pressure control with high accuracy modular pressure references providing the quickest and most accurate calibration solution available on the market today.  The MicroCal™ is an easy-to-use solution that significantly improves labor productivity and efficiency when compared to the leading competitors, providing immediate ROI.

Apprenticeship Programs: The Solution For More Skilled Workers

A shortage in skilled labor is a serious issue in United States'

manufacturing industry.  Why? There's a misconception of what kind of training someone needs to have in order to enter professions within this industry.  Many begin to build their skills through trade school before becoming a manufacturing professional.  These students don't always get the proper hands-on training that can truly prepare them for the complex world of manufacturing  Yet with these schools, there's still the perception that traditional degrees have more long-term value than vocation training.

Many of the following technical specifications appear on datasheets for pressure transducers and similar devices. Here we review their technical definitions and relationships.

Root Sum Squares (RSS): accuracy of a pressure transducer is calculated by taking the square root of non-linearity + hysteresis + non-repeatability.

Popular Types of Current Sensors

Current Shunts

Current Shunts are low value resistors that are inserted into a circuit. The shunt provides terminals to connects the sensed current and voltage monitoring terminals. The commercially available shunts have sensed current ranges from less than 1A to several hundred amps.

Humidity sensing is important, especially during the cold winter months that many of us are currently experiencing. Properly installing and using humidity transmitters helps building automation systems understand when the air becomes too dry or too humid for comfort.

Technology Trends at the 2015 AHR Expo

A week ago the 2015 AHR Expo kicked off at McCormick Place in Chicago. Not only were there 8% more exhibitors than last year's expo, but an extensive number of new HVACR products and technologies were featured at various booths. Setra was among these companies using the AHR Expo as a platform to launch the latest products in HVACR.

Here's What You Missed at the 2015 AHR Expo

Thank you to all who visited us at Booth 3823 in the Building Automation section of the AHR Expo. We enjoyed seeing both new and familar faces! The world's largest HVACR event was anything but boring. With 8% more exhibitors than last year and approximately 62,000 attendees, AHR was a huge success.