2482 Differential Piston Gauge

The Model 2482 is a high precision standard that provides unsurpassed performance in the field of differential pressure metrology at high static line pressures. The Model 2482 continues the Fluke Calibration standard of excellence and innovation. Designed to calibrate virtually any pressure device at high static line pressures, the 2482 is a revolutionary breakthrough, providing a fast, easy and accurate solution to what has historically been a time consuming and technique dependent process.

At the heart of the Model 2482 is a patented large cross-sectional area triple-axis differential piston assembly with axial symmetry less than one millionth of a meter. This unique assembly eliminates the need for a second deadweight piston and provides identification of the differential pressure as it is directly proportional to the mass load.

In traditional twin-post and divider systems minute load adjustments are required to establish zero differential at each line pressure. This results in a process that is both technique dependent and time consuming. This elaborate zeroing process is eliminated in the Model 2482 through the use of a precision load cell, actually a digital force balance. The load cell supports the weight of the differential piston and serves as a null detector to ensure the line pressure balance point.

Establishing a differential pressure is then as simple as loading the weights determined by the supplied WinPrompt® software and activating the control function. Once the control system restores the balance reading to zero the desired differential pressure is applied to the test instrument.

The differential piston assembly is manufactured from tungsten carbide which provides high strength, durability and long-term stability. This material also provides a very low dependence on temperature, low distortion from pressure and undetectable hysteresis.

The Model 2482 is supplied with a precision mass set in a sturdy wooden storage case. The mass set contains various denominations that are trimmed to provide precise output pressures with standard increments to 0.5 inH2O (1.0 mbar). The Winprompt® software performs pressure-to-mass and mass-to-pressure calculations for the Model 2482 along with the corrections for environmental influences. The operator is also provided with a display of the pressure being generated by a mass load. The environmental conditions for humidity, barometric pressure and ambient temperature can be entered manually or the values can be acquired from a Model 2456-LEM Laboratory Environmental Monitor.

Included with the 2482 is the Controller software package that provides set up information, tared and line pressure displays, power settings for the temperature controllers, a graphic display of the tared readings as well as the control buttons for the major operations of the instrument.

The Model 2482 is a hydraulically operated piston gauge that allows for gas calibrations through two gas/oil interface chambers. A manual hand pump is provided for line pressure generation of either hydraulic or pneumatic pressures. For pneumatic operation a regulated gas supply is required.