Overview
NRG's #40C is a MEASNET-calibrated anemometer primarily intended for wind prospecting applications. A four-pole magnet induces a sine wave voltage into a coil producing an output signal with frequency proportional to wind speed. This signal is measured by our data loggers. The #40C is constructed of Lexan. A rubber terminal boot is included. In February 2008, the #40C replaced the #40 anemometer.
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Specifications
| Measurement Description | Wind speed |
| Signal Type/Output | Low-level ac sine wave (pulse) |
| Operating Temperature Range | -55° to +60°C |
| Operating Relative Humidity | 0 to 100% RH |
| Starting Threshold | 0.78 m/s (1.75 mph) |
| Range | 1 to 96 m s-1 |
| Cup Distance Constant | 3.0 m (10 ft) 63% recovery |
| Cup Diameter | 5.1 cm (2 in.) |
| Swept Diameter of Rotor | 19.0 cm (7.5 in.) |
| Overall Assembly Height | 5.1 cm (3.2 in.) |
| Weight | 0.1 kg (0.2 lb) |
Compatibility
Note: The following shows notable compatibility information. It is not a comprehensive list of all compatible or incompatible products.
Data Loggers
| Product | Compatible | Note |
|---|---|---|
| 21X (retired) | ||
| CR10 (retired) | ||
| CR1000 (retired) | ||
| CR10X (retired) | ||
| CR200X (retired) | ||
| CR206X (retired) | ||
| CR211X (retired) | ||
| CR216X (retired) | ||
| CR23X (retired) | ||
| CR3000 (retired) | ||
| CR500 (retired) | ||
| CR5000 (retired) | ||
| CR510 (retired) | ||
| CR800 (retired) | ||
| CR850 (retired) | ||
| CR9000 (retired) | ||
| CR9000X (retired) |
Additional Compatibility Information
Data Logger Considerations
The #40C is measured by the PulseCount instruction in CRBasic and by Instruction 3 (Pulse Count) in Edlog. The #40C uses one pulse count channel on the data logger.
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