How a Dead Weight Tester Works

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A dead weight tester is a very handy piece of instrument for calibrating a pressure gauge or other pressure transducers in an industrial plant. But how does this device work? Lets find out:

A deadweight tester consists of a pumping piston with a screw that presses it into the reservoir containing a fluid like oil, a primary piston that carries the dead weight, W, and the pressure gauge or transducer to be calibrated as shown in the schematic above. It works by loading the primary piston (of cross sectional area A),

How to Use a Thermocouple: Practical Application Tips

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A thermocouple is said to be a ‘’simple’’ temperature measurement device. With a difference in temperature between its cold junction and hot junction, you have a voltage reading that gives you an indication of the temperature being measured. But is this really a simple device?

How to Calibrate DP Pressure Transmitters: 8 Effective Tips that Works

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Calibration of a DP pressure transmitter involves a process by which the output of the transmitter is adjusted to properly represent a known pressure input. Calibration is one of the most frequently performed maintenance operations on pressure transmitters. If well performed, the transmitter’s performance improves otherwise its performance could deteriorate with grave consequences. A pressure input is used to provide zero and span adjustments to the transmitter in the calibration process. Consult my previous post: How to Calibrate Your DP Transmitter for a detailed guide on how to calibrate a DP pressure transmitter.

Owing to the fact that a plant could go berserk, if one or two critical pressure transmitters are wrongly calibrated, it is important the calibration process and procedure be done properly. The following tips are general guides that you should have at the back of your mind when calibrating a DP pressure transmitter:

How to Calibrate a Pressure Switch with a Fluke Pressure Calibrator

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Owing to the fact that the pressure switch is a ubiquitous device, found regularly in every plant, the need to always calibrate the switch is always there. We have discussed how to calibrate and adjust a pressure switch in a previous post, but I do so again, this time using a Fluke pressure calibrator which is a very handy and popular device used by instrument technicians and experts.

How to Use a Fluke Pressure Calibrator for Calibration

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With the evolution of modern process plants, the analog pressure transmitter and pressure gauges have become very useful piece of instruments for transmitting pressure or for local indication by the pressure gauge. Often times it is required to calibrate these devices. What do you actually need to do this?