A new data acquisition peripheral from Campbell Scientific could provide greater monitoring capacity for those involved in wind farm surveys.
The LLAC4 is a small peripheral that increases the number of low-level AC signals that a datalogger can monitor. The module enables four datalogger control ports to emulate pulse-counting channels by converting the low level AC signals to the logic levels read by the control ports.
To use the LLAC4, the datalogger control ports must accept high frequency pulses, such as Campbell’s CR23X and CR5000. The CR200-series loggers are also compatible but the low-level AC signals must not exceed 1 kHz.
The LLAC4 is often used to measure up to four anemometers, and is especially useful in applications that require high numbers of pulse channels but fewer control ports, making it ideal for wind prospecting applications.