The Model 3712 is a portable, self-contained pressure calibrator with the capability to calibrate hydraulic and pneumatic pressure gauges by comparison with reference master gauges. The pressure is manually generated through the use of hand pump and hydraulic oil is used as the pressure medium. Test gauges that are filled with oil can be installed directly onto the calibrator. For applications where the test gauge contains a different type of fluid, such as water, a fluid separator is installed to act as a physical barrier between the two fluids.
A fill and drain system is also provided to fill pneumatic or liquid gauges prior to installing the gauge on the calibrator. After completion of the calibration, the fill and drain system can be used to flush and dry the gauge. The fill and drain system can be operated electrically or manually.
The calibrator consists of a pressure hand pump assembly, a set of master pressure gauges, fill and drain assembly, fluid separators, hand vacuum pump, electrically operated vacuum pump, and test gauge adapters.