RNRG IceFree3 Heated Vane

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Details

The IceFree3 Heated Vane’s head is directly connected to a 10K ohms conductive plastic potentiometer located in the main body. When a constant DC excitation voltage is applied to the potentiometer, it produces an analog voltage output directly proportional to the wind direction.

The sensor’s potentiometer linearity is within 1 percent of wind direction, ensuring precise measurements. The signal output is an analog DC voltage. The internal heater is powered by 24 VAC and allows for an operating temperature range of -40°C to 80°C (-40 °F to 176 °F). The optional 120/240 VAC to 24 VAC Transformer - IceFree3 Sensors is available to step down 120/240 VAC grid power.

The IceFree3 Heated Vane comes with an 8 m potted cable that can be extended to your desired length using Power Cable Kit - IceFree3 Sensor 3C, sold separately and available in 10 meter increments up to 90 meters.

Specifications

	IceFree3 Heated Vane \| 8m (26.4') cable (#2450)
Description
Sensor type	continuous rotation potentiometric heated wind direction vane
Applications	wind resource assessment meteorological studies environmental monitoring
Sensor range	360° mechanical, continuous rotation
Instrument compatibility	all NRG loggers
Output signal
Signal type	analog DC voltage from conductive plastic potentiometer, 10K ohms
Transfer function	output signal is a ratiometric voltage
Accuracy	potentiometer linearity within 1%
Dead band	8° Maximum, 4° Typical
Power requirements
Supply voltage	regulated potentiometer excitation of 1 V to 15 V DC
Heater supply voltage	24 V AC/DC optional transformer available
Heater supply current	Inrush: 8 A maximum Steady state: 1 A at 20 °C (68 °F), 4 A under maximum thermal load (head frozen in clear ice then powered on)
Installation
Mounting	mounts to a 27 mm (1.05 inch) diameter (3/4 inch IPS) pipe with a 3/8 inch lock bolt; cabling exits into mounting pipe
Tools required	13 mm (0.5 inch) nut driver
Environmental
Operating temperature range	-40 °C to 80 °C (-40 °F to 176 °F)
Operating humidity range	0 to 100% RH
Physical
Connections	Signal Cable red: excitation black: common white: signal Heater Cable black/white: heater power (AC or DC)
Cable length	8.1 m (26.6 ft) signal and heater cables
Weight	1.23 kg (2.7 pounds)
Dimensions	overall assembly height: 239 mm (9.41 inches) body diameter: 70 mm (2.75 inches) swept diameter: 212 mm (8.38 inches) center to tail radius: 106 mm (4.19 inches)
Materials
Wing	precision balanced aluminum with black anodized finish and heat-resistant black paint
Body	cast aluminum with black anodized finish and heat-resistant black paint
Shaft	centerless ground, stainless steel
Bearing	upper: sealed, stainless steel, ball bearing with application specific lubrication lower: stainless steel bearing
Cable	Signal: 3 conductor 20 AWG, chrome PVC jacket with overall foil shield and drain Heater: 2 conductor 20 AWG, Teflon jacket with overall foil shield and drain
Enclosure	sealed to IP55 heater is epoxy encapsulated to IP65
Signal generator	glass reinforced thermoplastic shell
Heater	fully encapsulated, self-regulating
Base	cast aluminum with black anodized finish and heat-resistant black paint

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