Campbell-scientific RAWS-P Remote Automated Weather Station Uživatelský manuál stáhnout pdf (Strana 16)

RAWS-P Remote Automated Weather Station

4.2.3 Troubleshooting

If a problem is suspected, check the sensor cable. Disconnect the connector

and use a digital volt meter (DVM) to check the resistance between Pin A

(sensor signal) and Pin C (sensor ground). The resistance should read as an

open circuit until you move the rain gage tipping mechanism where the magnet

swings past the reed relay. Try connecting a substitute sensor. Obtain an

RMA number before returning this sensor to Campbell Scientific for repair.

Consult the TE525-L manual for more information.

NOTE

4.3 Solar Radiation

4.3.1 General Description

The Apogee Pyranometer (pn CS300-LQ) measures incoming solar radiation

with a silicon photovoltaic detector mounted in a cosine-corrected head. The

detector outputs current; a shunt resistor in the sensor converts the signal from

current to voltage. During the night, the CS300-LQ may read slightly negative

incoming solar radiation. The negative signal is caused by RF noise.

4.3.2 Wiring

The CS300-LQ attaches to the connector labeled SOLAR RAD SDI-12; this

connector is color coded green. The pyranometer sensor is internally wired

from the RAWS connector panel to the CR1000 datalogger.

TABLE 4-3. SOLAR RAD SDI-12 Connector (color coded green)

Connector Pin Description CR1000 Terminal

A Solar Sensor + 3H

B Solar Sensor - 3L shorted to

C Solar Sensor Ground

D SDI-12 Ground G (used for a second SDI-12

sensor)

E SDI-12 Signal C5 (used for a second SDI-12

sensor)

F SDI-12 12 V 12V (used for a second SDI-12

sensor)

4.3.3 Troubleshooting

If a problem is suspected, check the sensor cable. Disconnect the connector

and use a DVM to check the voltage between Pin A Solar Sensor (+) and Pin B

Solar Sensor (-). The voltage should be 0 to 200 mV for 0 to 1000 W m

-2

radiation. No voltage indicates a problem with either the photodiode or the

shunt resistor, both of which are potted in the sensor head and cannot be

serviced. Try connecting a substitute sensor. Obtain an RMA number before

returning this sensor to Campbell Scientific for repair.

1 2 ... 11 12 13 14 15 16 17 18 19 20 21 ... 33 34

Žádné komentáře

Campbell-scientific RAWS-P Remote Automated Weather Station Uživatelský manuál Strana 16