Campbell 020C, Instruction Manual

Page: 12 / 30

020C Wind Direction Sensor
4
6. If LoggerNet , PC400, RTDAQ , or PC200W is running on your PC, and the
PC to datalogger connection is active, you can click Finish in Short Cut
and you will be prompted to send the program just created to the
datalogger.
7. If the sensor is connected to the datalogger, as shown in the wiring
diagram in step 4, check the output of the sensor in the datalogger support
software data display to make sure it is making reasonable measurements.
5. Overview
The lightweight, airfoil vane is directly coupled to a single precision micro-
torque potentiometer. The built-in electronics provide a voltage source for the
potentiometer and amplifies the output signal for transmission over long cable
lengths. The 020C includes an internal heater, which provides positive clean
aspiration through the bearings, thereby greatly increasing bearing life. It also
includes electrical field surge protection that reduces problems associated with
static fields, near-miss lightning hits, and poor grounding systems.
The vane assembly is easily installed or replaced without requiring
recalibration. All sensor components are constructed with stainless steel and
anodized aluminum.
6. Specifications
Features
•
Low starting threshold
•
Internal heater for long bearing life
•
Low profile to minimize turbulence
•
High damping ratio
•
Short delay distance
•
Quick-disconnect connector
•
Compatible with Campbell Scientific CRBasic dataloggers: CR300
series, CR6 series, CR800 series, CR1000, and CR3000
Measurement
Range: Electrical 0
°
to 357
°
Mechanical 0
°
to 360
°
Threshold: 0.5 mph
Linearity:
±
0.5% of full scale
Accuracy:
±
3
°
Damping Ratio: 0.4
Delay Distance: Less than 91 cm (3 ft)
Temperature Range: –50 to 85
°
C (–58 to 185 °F)
Power requirement
Sensor
Source: 12 Vdc
Load: 10 mA
Heater
Source: 12 Vdc
Load: 350 mA