| 摘要 |
<p>A particle counter (38; 70) including a modulator (59; 93) to allow electronically determining calibration. The modulator (59; 93) is connected to a driving circuit (55; 95) of a source of light (39; 71) to cause the light source (39; 71) to emit a beam (57; 83) of a constant amplitude, representing at least one particle of predefined size. Light transmitted along an optical axis (45; 77) changes in intensity in response to a signal produced by the modulator (59; 93). A detector (47; 87) is positioned to sense the change in intensity to produce signals (63) proportional to the light sensed. A displaying device, such as a pulse height analyzer (49; 89), is in electrical communication to receive the signals (63) produced by the detector to quantitatively display (69) the change in intensity of the light.</p> |
