摘要 |
<p>An encoder to be mounted to a piston meter and configured to compute a volume of distributed fluid includes a light sensor configured to detect a light sequence and output signals indicative of the light sequence to a processing device, the processing device configured to determine if the light sequence is one of one or more authorized light sequences, wherein the processing device enters a calibration mode if the light sequence is one of the one or more authorized light sequences.</p> |