INVESTIGATION OF CHARACTERISTICS OF 133 Pa CDG USING PRESSURE BALANCE

• Abstract:

  The purpose of this paper is to investigate the characteristics of precise low-pressure gauges such as Capacitance Diaphragm Gauge (CDG) devices in the range 133 Pa using a commercial gas-operated pressure balance. Generally the pressure balance is not adequate to calibrate such low pressure gauges as the minimum pressure to balance the tare weight corresponds to a pressure of several kilopascals. However using a variable bell-jar pressure method can overcome this difficulty. To realize this method effectively, we developed a new weight-handling device that makes it possible to add or remove weights easily. This apparatus is very useful to find the characteristics of such low-pressure gauges. Moreover, one of the greatest benefits of this method is the traceability to link directly to the gas pressure standard that is easily traceable to the national standard.
• Keywords:

  CDG, pressure balance, characteristics
• Download:

  PWC-2006-TC16-009u.pdf
• DOI:

  _unreg_wc-2006.TC16-009

Event details: