Apogee SQ-627 소유자 매뉴얼 - 페이지 15

{카테고리_이름} Apogee SQ-627에 대한 소유자 매뉴얼을 온라인으로 검색하거나 PDF를 다운로드하세요. Apogee SQ-627 17 페이지. Extended range pfd sensor

TROUBLESHOOTING AND CUSTOMER SUPPORT

Independent Verification of Functionality

If the sensor does not communicate with the datalogger, use an ammeter to check the current drain. It should be

near 1.4 mA when the sensor is not communicating and spike to approximately 1.8 mA when the sensor is

communicating. Any current drain greater than approximately 6 mA indicates a problem with power supply to the

sensors, wiring of the sensor, or sensor electronics.

Compatible Measurement Devices (Dataloggers/Controllers/Meters)

Any datalogger or meter with SDI-12 functionality that includes the M or C command.

An example datalogger program for Campbell Scientific dataloggers can be found on the Apogee webpage at

https://www.apogeeinstruments.com/content/Quantum-Digital.CR1.

Modifying Cable Length

SDI-12 protocol limits cable length to 60 meters. For multiple sensors connected to the same data line, the

maximum is 600 meters of total cable (e.g., ten sensors with 60 meters of cable per sensor). See Apogee webpage

for details on how to extend sensor cable length

(http://www.apogeeinstruments.com/how-to-make-a-

weatherproof-cable-splice/).