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Balances manométriques
Une balance manométrique est un étalon qui repose sur le principe de l'équilibre de la pression pour étalonner les instruments de mesure de pression. Les balances manométriques utilisent des poids étalonnés pour appliquer des pressions connues à l'appareil testé et constituent une solution simple et rentable qui couvre un large éventail de plages d'étalonnage de pression. L'avantage principal de la balance manométrique repose sur le fait que l'ensemble du matériel requis pour générer la pression, la contrôler avec précision et la mesurer peut être contenu dans l'instrument. Les balances manométriques de Fluke Calibration sont connues pour leur excellence en matière d'incertitude, la rapidité de leur temps de stabilisation, la facilité avec laquelle il est possible d'effectuer des réglages précis et la conception unique de leur support qui vous permet d'assurer l'étanchéité de l'appareil testé avec vos doigts.
Deadweight tester calibration
Deadweight tester calibration is the act of comparing the readings of a device under test, such as a pressure gauge, to the known pressures produced by precise weights. The basic steps to perform calibration with a deadweight tester include attaching a pressure measurement device to the tester, applying a series of weights to generate known pressures, and comparing the known pressures to pressure readings from the device under test.
Advantages of using a deadweight tester to calibrate pressure measurement devices arethat they cover a wide range of pressures and offer very stable pressures when calibrating devices. The pressure stability is especially noticeable when compared to the option of pressure comparators with digital gauges.
Various names of a deadweight tester
People refer to a deadweight tester in many ways including:
- dead weight pressure tester
- dead weight calibrator
- dead weight machine
- dead weight apparatus
The difference between a hydraulic and pneumatic deadweight tester
The main differences between a hydraulic and pneumatic deadweight tester are that the hydraulic tester is operated by a liquid under pressure while a pneumatic tester is operated by air or gas. Hydraulic deadweight testers go to higher full-scale pressures while pneumatic units are more appropriate for lower pressures.
Fluke offers multiple types of deadweight testers:
- Hydraulic deadweight testers
- Pneumatic deadweight testers
- Oil deadweight testers
- Water deadweight testers
Each one is designed to generate precise pressure to calibrate pressure-measuring instruments.
Deadweight pressure testers are most often used in calibration laboratories to calibrate electronic or mechanical pressure-measuring tools, like pressure gauges or vacuum gauges. Over time, these tools can become less accurate, so it’s necessary to calibrate in order to ensure proper, consistent measurements each and every time.
How to use a deadweight tester
The following video and links to other videos show how to use deadweight testers and demonstrate how they work. Some videos demonstrate pressure gauge calibration using a deadweight tester. And there’s a video that demonstrates how to use an electronic deadweight tester and explains its benefits vs non-electric deadweight testers.
- P3100 Series Hydraulic Deadweight Tester - Video Demo
- P551X and 2700G Introduction and Demonstration Video
- E-DWT-H & 6531/6532 Electronic Deadweight Tester Video Series
Deadweight Tester Comparison Guides
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