CNR4 Net Radiometer
11
3. Insert the sensor support arm into the mounting block of the mounting
bracket kit. Make sure the sensor points in the direction of the arrows that
appear after the word
SENSOR
on top of the bracket (see FIGURE
If the CNR4 is being used at a location where snow and ice
accumulate, or high winds are expected, then the mounting rod
should not be fully extended.
Do not attempt to rotate the instrument using the sensor
heads, or you may damage the sensors; use the mounting
rod only.
4.
Perform a coarse level
l
ing of the sensor using the sensor bubble level.
5.
Tighten the four screws on top of the mounting bracket to properly secure
the support arm so that it does not rotate (see FIGURE
The four screws need to be tightened evenly to ensure that
the screwhead is in full contact with the V-plate.
6.
Perform the fine leve
l
ling using the two spring-loaded leve
l
ling screws—
one on the front and the other on the back of the bracket.
7.
Route the sensor cable to the instrument enclosure.
8.
Use the UV-resistant cable ties included with the tripod or tower to secure
the cable to the vertical pipe or crossarm and tripod/tower.
7.3 Wiring
This manual provides wiring information for CNR4 sensors and
cables purchased from Campbell Scientific. Sensors and cables
purchased directly from Kipp and Zonen will have different
wiring.
The CNR4 has two outputs for short-wave radiation, two outputs for long-wave
radiation, thermistor output, and Pt-100 temperature sensor output. The
optional CNF4 heater/ventilator unit has power wires for heater and ventilator
and a control/pulse wire for the tachometer.
The CNR4 has a SOLAR cable and a TEMP cable (FIGURE
). Connect the
SOLAR cable to the
S
port and the TEMP cable to the
T
port (FIGURE
).
The two cables, SOLAR and TEMP, have identical connectors, and therefore
ensure that the correct cables are connected to the correct ports of the sensor.
NOTE
CAUTION
CAUTION
NOTE
