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活塞式压力计
"活塞式压力计是一种校准用基准装置,可根据压力平衡原理来校准压力测量仪表。 活塞式压力计使用经过校准的砝码向待测试设备产生压力。该校准解决方案具有简单、经济和适用压力校准范围广等特点。活塞式压力计的一个重要优势在于,产生压力和实现精确控制及测量所需的所有硬件均包含在一个仪器中。Fluke Calibration活塞式压力计凭借业界一流的不确定度、可快速稳定和易于微调等特点而深受广大用户青睐,并且具有独特的安装柱设计,操作员只需通过手拧即可密封待测试设备。"
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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