| 摘要 |
<p>A compact, inexpensive, and lightweight pressure calibrator (10) comprises a plunger (14) sized to slide snugly within a hypodermic syringe barrel (12). Included within the plunger are a pressure transducer (56), a microprocessor (54) and other electronic components (62). A digital display (30) disposed within the side of the plunger is operative to display the pressure developed within the syringe barrel (12) as the operator moves the plunger. "O" rings (28) provide a hermetic seal between the plunger and the internal bore (16) of the syringe barrel. A tube (22) is connected to the output port (20) of the syringe and provides fluid communication between the syringe and a pressure monitoring device (26) being calibrated.</p> |
