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Setra Blog

December 10, 2015

IMPORTANCE OF PRESSURE IN AUTOMOTIVE TESTING

Engine and Power Train Testing Applications

Pressure is a big part of engine testing and automotive component manufacturing. That’s why wherever you find engines being tested; you’ll likely find transducers measuring everything from air intake pressures to exhaust back-pressures. In the automotive industry, you’ll find transducers measuring everything from tire inflation pressure for dynamometer testing to controlling tool pressure during crankshaft journal burnishing. 

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November 02, 2015

Pressure Transducers for High Temperature Liquids & Gases

One factor that should be considered when selecting an industrial pressure transducer for monitoring high temperature liquids or gases is the operating temperature range of the transducer. This specification is included under environmental data on most manufacturers' data sheets. 

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October 29, 2015

6 Things OEM Design Engineers Need to Know

Any design engineer must seriously consider the manufacturing environment when looking to select a pressure transducer for inclusion within a refrigeration chiller, pump, engine test equipment, or other machinery. The life of a pressure transducer is proportional to the system design and assembly process. 

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October 19, 2015

How to Troubleshoot 2 & 3 Wire Circuits

The following steps clearly indicate the exact sequence to properly troubleshoot a Setra 2 wire, mil-amp circuit. You must work with the assumption that either the Setra product or the system & circuitry is bad.

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October 15, 2015

Accuracy: End Point Method vs. Best Fit Straight Line Method

Which method provides better accuracy?  Non-linearity as the End Point Method is the relationship of the calibration curve to a specified straight line through its endpoints (i.e. Zero and Full Scale). Best Fit Straight Line (BFSL) method is the relationship of the calibration curve to a calculated straight line that minimizes the error but does not pass through the end points. BFSL method effectively cuts the end point value in half.

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September 28, 2015

What is a Dynamometer and How Does it Work?

A dynamometer, or "dyno" for short, is a device for measuring force, moment of force (torque), or power. For example, the power produced by an engine, motor or other rotating prime mover can be calculated by simultaneously measuring torque and rotational speed (rpm).

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September 21, 2015

6 Ways to Prevent Pressure Transducer Failure

If pressure transducers are exposed to a manufacturing environment that exceeds the suppliers specified limits, sensor issues will occur. during storage or assembly. An original equipment manufacturer (OEM) design engineer should take note of the following six conditions while designing a system to be manufactured and shipped to an end-user.

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July 27, 2015

How to Select a Pressure Transducer For High Temperature Environments

Using temperature stand-offs can replace expensive high temperature pressure sensors.

When selecting a pressure transducer for monitoring high temperature liquids or gases, be sure to note the operating temperature range of the transducer. This specification is included under environmental data on most manufacturers’ data sheets. The temperature compensated range specification of a transducer is the error introduced as temperature increases or decreases from 70°F. This thermal error affects both the span and zero setting of the transducers analog output and is generally listed as a percent of full scale per degree (% FS/°F). The static accuracy (accuracy at 70°F) of the pressure transducer plus the thermal error introduced by a high temperature pressure source is the total possible error for a specific high temperature pressure measurement

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May 07, 2015

Fill the Skill Gap with Manufacturing Apprenticeships

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.

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April 28, 2015

What is a Strain Gauge Pressure Transducer?

Thin Film Technology Strain Gauge

Thin film pressure transducers are made by vapor deposition or sputtering of insulation and strain gauge elements directly on a polished pressure sensing diaphragm or beam. The desired strain gauge pattern is deposited either by masking the non-conductive areas or by etching away unwanted conductive material. Laser trimming is used to calibrate the resistive elements.

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