The Model 3112 Portable Live Pressure Calibration and Test System is a compact, completely self-contained unit designed for calibrating and testing pressure gauges, transducers, pressure switches, and other pressure-sensitive instruments up to 2,000 psi with an accuracy of ±0.5% of full scale. Two large, legible gauges, reading from 0 to 100 psig and 0 to 2,000 psig respectively, and controlled by an automatic transfer valve, permit precise stepless measurements over the entire range of the system. Other pressure ranges and units of measure (e.g., kPa) are available upon request.
An internal nitrogen cylinder with a capacity of 90 cubic inches (7.1 std. cubic feet when charged at 2,250 psi at 70°F), permits the Model 3112 Portable Live Pressure Calibration and Test System to be easily transported to remote locations—no external gas or power sources are required. The cylinder can be charged using any available high pressure nitrogen source, and is wire-wound for protection against impact. Additional safety features include “blow-out back” master gauges to protect the operator from glass breakage in the event of a malfunction, burst discs to guard against inadvertent over-pressurization, and a relief valve designed to protect the test item and master gauges from damage.