Apogee Instruments PYRANOMETER SP-421 Panduan Pemilik - Halaman 11
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OPERATION AND MEASUREMENT
The SP-421 pyranometer has a SDI-12 output, where shortwave radiation is returned in digital format. Measurement of SP-
421 pyranometer requires a measurement device with SDI-12 functionality that includes the M or C command.
VERY IMPORTANT:
Apogee changed all wiring colors of our bare-lead sensors in March 2018 in conjunction
with the release of inline cable connectors on some sensors. To ensure proper connection to your data device,
please note your serial number or if your sensor has a stainless-steel connector 30 cm from the sensor head then
use the appropriate wiring configuration below.
Wiring for SP-421 Serial Numbers range 0-1173
Wiring for SP-421 Serial Numbers 1174 and above or with a cable connector
Red: Power In (4.5-24 V DC)
Black: SDI-12 Data Line
Clear: Ground (shield wire)
Black: Ground
Red:
Power In (5.5-24 V DC)
White: SDI-12 Data Line
Clear: Shield/Ground
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