The AL200 is an ALERT2 encoder and modulator that supports ALERT2 and ALERT-concentration services. It meets the ALERT2 standards maintained by National Hydrologic Warning Council (NHWC) and ALERT Users Group (AUG). ALERT2 improves the accuracy and performance of flood warning systems and software, by providing you with faster data transfer, forward error correction, and a TDMA architecture.
With integrated sensor inputs, the AL200 allows you to create a minimal ALERT2 transmitter/station, decreasing the cost of a typical flood warning system. Combining the AL200 with a Campbell Scientific data logger provides enhanced sensor support, user-defined logic and control, and data logging capabilities.
Note: Portions of the AL200 embedded code were developed and copyrighted by Blue Water Design LLC and are used under license.
When used standalone, the AL200 can generate time and event driven reports for Battery, Clock Status, Tipping Bucket, Analog Input (mV or mA), Digital (SDI-12 or High/Low State).
|Power Connector||Two-wire, 0.15-in. pitch removable terminal (reverse polarity protected)|
|Power Requirements||9 to 18 Vdc|
|Configuration||Device Configuration Utility over USB (settable modulation levels using Device Configuration Utility)|
|LEDs||GPS, Serial, Radio (RS-232 and CS I/O share serial activity LED.)|
|CS I/O Port||SDC 7, 8,10, or 11 (multiplexed with on-board sensor interface)|
|Temperature Range||-40° to +60°C|
|Timekeeping Setting via GPS||±1 μs|
|Drift||±0.17 s/day (without GPS sync, 40°C temperature change)|
|Analog Input (SE1) Sensor Interface||0 to 5 Vdc (16-bit ADC; millivolt or 4 to 20 mA selectable)|
|Protocols Supported||ALERT1 and ALERT2|
|SMA Connector||Active GPS antenna|
|Test Button||Test transmit and tone|
|Dimensions||16 x 7.7 x 2.2 cm (6.3 x 3.0 x 0.9 in.)|
|Channels Available||Switch closure (P1), single-ended analog (SE1), limited SDI-12 (C1), switched 12 V, ground|
|Analog input (SE1)||0 to 5 Vdc, 16-bit Adc (millivolt or 4 to 20 mA selectable)|
|Channels Available||TX, PTT, switched battery, ground|
|RCFSK Modulation||100 to 1000 mV, ±50 mV (software selectable)|
|Compliance||RoHS and CE|
|Product Standard||EN 61326-1:2013|
Please note: The following shows notable compatibility information. It is not a comprehensive list of all compatible products.
The AL200 supports ALERT1 and ALERT2 protocols.
A standalone AL200 can measure: