Apogee Instruments ST-100 소유자 매뉴얼 - 페이지 16
{카테고리_이름} Apogee Instruments ST-100에 대한 소유자 매뉴얼을 온라인으로 검색하거나 PDF를 다운로드하세요. Apogee Instruments ST-100 18 페이지.
페이지 인쇄Modifying Cable Length
When the sensor is connected to a measurement device with high input impedance, sensor output signals are not
changed by splicing on additional cable in the field. Tests have shown that if the input impedance of the
measurements device is 1 mega-ohm or higher then there is negligible effect on ST series temperature sensors,
even after adding up to 100 m of cable. See Apogee webpage for details on how to extend sensor cable length
(http://www.apogeeinstruments.com/how-to-make-a-weatherproof-cable-splice/). For cable extensions, shielded,
twisted pair cable is recommended, in order to minimize electromagnetic interference. This is particularly
important for long lead lengths in electromagnetically noisy environments.
The precision bridge resistor is located at the pigtail end of the ST-300 cable. Thus, the ST-300 temperature sensor
cables should not be shortened, otherwise the bridge resistor will be removed.