Deadweight testers a deadweight tester is a primary standard for calibrating pressure instruments. The system is a complete and selfcontained compact unit. The classic remote command format is highly intuitive and conforms with previous dhi ppc and rpm4 products. The dh budenberg deadweight tester models cpb5800 and cpb3800 can be equipped with a dual piston. The eurotron p100 pressure gauge is a new microprocessor controlled digital pressure gauge which offer high precision, stabilityand functionality in a compact and robust solution package. Dead weight piston gauge pressure standard up to 80 mpa a patented technology for the dead weight piston gauge pressure standard is indigenously designed, developed and fabricated at npl. A device for calibrating pressure gauges a, 2852015 lutfi alsharif. This model is engineered to offer userfriendly features, safe operation, and an optimal performance in the field or in the lab. Weight sets are available in a variety of units of measure such as psi, inh.
Deadweight testers are so called primary standards citation. The gauge is powered by long life internal alkaline battery and offer an autopower off function in. Open the overflow valve remove the transportcap if necessary topping up the hydraulic oil inserting the piston to check the zero point of the bourdon gauge, proceed as follows. Evaluation of low vacuum gauge using deadweight piston. A dead weight tester apparatus uses known traceable weights to apply pressure to a fluid for checking the accuracy of readings from a pressure gauge. Deadweight piston gauge have been widely used as a fundamental instrument of precise pressure measurement because they are robust, accurate, potable, convenient to use and are able to realize the. Deadweight testers use a precision pistongauge system consisting of a vertically mounted, piston and cylinder assembly, and accurately calibrated weight masses that are loaded onto the piston. Liquidliquid seals, two gauge stands, carry cases etc pistoncylinder unit. Fully hardened and stabilised tool steel piston for better performance weights.
Hydraulic and gauge deadweight tester product description the hydralite hydraulic deadweight tester is a primary standard that features a reentrant type measuring piston and cylinder assembly that helps maintain accuracy as the test pressure increases. Model hl hydraulic and gauge deadweight tester jlw. Includes information to setup the pistoncylinder units and mass set also. Dead weight piston gauge pressure standard up to 80 mpa. A typical deadweight tester consists of the same components comprising a deadweight gauge, in addition to a handoperated, selfcontained pump for the generation of pressure. Together, these primary physical quantities are used to generate a highly accurate pressure which can be ported into a device being tested or. Weights are placed on one end of the piston and are supported by fluid pressure applied to the other end. Deadweight testers are the primary standard for pressure measurements. The piston floats freely in its cylinder and the pressure in the circuit will be determined by the weights loaded on the piston divided by the effective area of the piston with corrections for value of acceleration due to gravity, air buoyancy, surface tension and datum level. Pneumatic deadweight tester product description the pk ii tester is a floating ball type, pneumatic deadweight tester. The type t tester features a reentrant type measuring piston and cylinder assembly, which reduces the rate of fluid leakage and increases float time, helping to maintain accuracy as test pressures increase. The below images show how to compare calibration certificate results to presscal calculations.
You have discs of known masses with which the tester is loaded. Piston gauges primary pressure standards fluke calibration. Now the valve in the apparatus is opened so that the fluid pressure p is transmitted to the gauge, which makes the gauge indicate a pressure value. These deadweight testers offer you the flexibility of handling both positive and vacuum pressures. Calibration of a pirani vacuum gauge by using a deadweight piston gauge article in journal korean physical society 5 september 2007 with 429 reads how we measure reads. The applications notes are adobe acrobat pdf files. The deadweight gauge, also known by the alternative names of piston gauge and pressure balance, is shown in the schematic form in figure 15. Fluke calibration piston gauges provide reference level primary pressure measurements for some of the top laboratories in the world. Pit5000 digital deadweight tester rental the trusted. Utilizing the well proven pistongauge system consisting of a vertically mounted, precision lapped piston and cylinder assembly, accurately calibrated weight masses force are loaded on the piston area, which rises freely within its.
For more information on renting this product please contact meriam at 216. Pressure gauge calibration with dead weight tester. Hydraulic deadweight testers gauge valve calibration. Download application note support files as required. View an application note by clicking the corresponding pdf link. Containing all necessary items for immediate startup. Of special interest is its portability for field use. Details download standard articles configurator applications of the ddad weight tester primary standard for calibrating the pressure scale in a hydraulic range up to 1, bar 20, psi reference instrument for factory and calibration laboratories for the testing, adjustment and calibration of pressure measuring instruments complete, standalone system. Piston cylinder information in the calibration certificate effective area at 23 degrees celsius and zero pressure piston cylinder information in presscal. Open the oil reservoir valve and unscrew the screw pump fully. Due to the weight, the piston moves downwards and exerts a pressure p on the fluid. Presscal software compare with calibration certificate.
You may do so in any reasonable manner, but not in. See the below link to view or download a file for setting up a 2465 piston gauge with pg monitor in compass for pressure. Model h lg deadweight gauges include the deadweight column, instrument post and 12 npt adapter. Precision pressure measurement user guide to pressure measurement pcp20100200 may 20 table of contents chapter. Calibration laboratory resources earth observing laboratory. The maximum sink rate for each pistoncylinder is 0. A dual piston can greatly increase the range of a deadweight using only a single set of weights. Using a dual piston with a deadweight tester mensor. Selfregulating pressure standard the ametek pk ii pneumatic deadweight tester is a primary standard.
The deadweight gauge is the most accurate instrument available for the pressure measurement. Download the ios download the android app other related. Tester components are mounted on a base and are protected by a carrying case. An optional conversion kit, t535, is available to convert a deadweight gauge to a deadweight tester. In deadweight testers, p is the pressure of the fluid under the piston, f is the force created by the stacked masses within a gravitational field, and a is the cross sectional area of the piston. The deadweight piston gauge bell and howell is used is to measure pressure in terms of fundamental units force and area. It is a nullreading type of measuring instrument in which weights are added to the piston platform until the piston is adjacent to a fixed reference mark, at which time the downward force of the weights on top of the piston is balanced by the pressure. If lower sink rates are required, please refer to the model 2468 gas piston gauge. Our primary level pressure balances utilize a fundamental equation to determine generated pressure with very low levels of uncertainty. Press the piston out of the cylinder using the hand wheel remove the piston and weight support adjust the oil level in the open. The series 543 indicator economical, easytouse indicator, stand and contact foot, for film and sheet thickness spot checks with digital thickness resolution to 0.
Calibration of a pirani vacuum gauge by using a deadweight. The fluid can be either a liquid, a hydraulic deadweight tester, or a gas, a pneumatic deadweight tester. Gauges do you want the instrument to test the unknown pressure of a pipeline. A primary standard is one that has no calibration adjustments, and hence is inherently accurate. See the link at the bottom of this article to view download the same text and images in a pdf file. Fluke calibrations p3000 pneumatic deadweight tester series offer you several highquality options to economically match your pressure calibration requirements. Our piston gauge lineup includes models that offer full automation. The top portion of the piston is attached with a platform to carry. Close the oil reservoir valve and pressurize the system using screw pump slowly ll the weight is liing by 4 to 5 mm or up to the red mark. Addition of variety of deadweights to meet your specific astm application. This file is licensed under the creative commons attributionshare alike 3.
I think you mean dead weight pressure gauge tester. A dead weight tester dwt is a calibration standard method that uses a piston cylinder on which a load is placed to make an equilibrium with an applied pressure underneath the piston. Hydraulic dead weight tester yantrika instruments pvt. Address 1104 north 105th east avenue tulsa, oklahoma 74116 phone numbers 9186211700 8668364729 toll free 9186211704 fax. Pressure standards free download as powerpoint presentation. The force produced pushes the loaded free piston vertically upwards. It is an apparatus used for calibrating and verifying the accuracy of pressure gauges. Download the pdf by rightclicking the link and choosing save file as. The entire instrument is contained in a sturdy carrying case with handle. Ametek precision pressure measurement control global. The hl series tester is designed for rapid interchanging between. The dead weight tester apparatus consists of a chamber which is filled with oil free impurities and a piston cylinder combination is fitted above the chamber as shown in diagram. Four pistoncylinder combinations are now available to generate pressures over the total range of the system. Pressure calibration using precision deadweight piston.
Connect the pressure gauge in gauge connecon using proper adapter. The hydralite hydraulic deadweight tester is a primary standard that features a reentrant type measuring piston and cylinder assembly that helps maintain accuracy as the test pressure increases. Rotate the lied weight slowly and compare the pressure gauge. Flukedhi automated mass handling deadweight piston gauge system for automated crossfloating and gauge calibration up to 7 mpa 1,000 psi. A piston is inserted into a close fitting cylinder. P3100 series hydraulic deadweight tester video demo. Also see other files in this section, the applicable product manuals and the electronic help file in compass for pressure. There is a small diameter, high pressure piston that rotates within a larger diameter, low pressure piston. The reference standard for pressure is thus a piston and cylinder assembly pca.
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