AL200 ALERT2 Encoder, Modulator, and Sensor Interface
ALERT2 Ready
Improved accuracy and performance for flood warning systems
météorologie : eau : energie : gaz & flux turbulents : infrastructure : terre :

Aperçu

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.

Lire la suite

Avantages et caractéristiques

  • Easily configurable with graphical, point-and-click software
  • Integrated sensor inputs for greatly reduced station cost
  • Onboard measurement of supply voltage, clock/GPS quality
  • Event or schedule driven reports for battery, clock, tipping bucket, voltage, current, SDI-12, high/low state
  • Screw terminals for power, radio, and sensors for easy cabling
  • Easy access test features for transmission, radio power, and alignment
  • Support of encrypted ALERT2 messages; support of 250-millisecond slots

Images

Description technique

Channels Available and Their Functions

  • P1: Tipping Bucket / Switch Closure Count Accumulator
  • SE1: Single-ended Analog Input, millivolt or milliamp
  • C1: Digital for limited SDI-12 or High/Low State
  • SW12: Switched power for powering sensors
  • G: Ground

ALERT2 Reporting

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).


Compatibilité

Veuillez noter : Ce qui suit montre des informations de compatibilité générales. Ce n'est pas une liste complète de tous les produits compatibles.

Centrale de mesure

Produits Compatibilité Note
CR1000 (obsolète)
CR1000X
CR200X (obsolète)
CR216X (obsolète)
CR300
CR3000 (obsolète)
CR310
CR350
CR5000 (obsolète)
CR6
CR800 (obsolète)
CR850 (obsolète)
CR9000X (obsolète)

Informations de compatibilité supplémentaires

The AL200 supports ALERT1 and ALERT2 protocols.

A standalone AL200 can measure:

  • Analog sensors with 0 to 5 V or 0 to 20 mA output
  • SDI-12 sensors
  • Float / contact switch sensors
  • CS451 and CS456 Pressure Transducers
  • CS475, CS476, and CS477 Radar Water-Level Sensors
  • CS460 Pressure Transducer
  • SR50A Sonic Ranging Sensor
  • CS11 AC Current Sensor

Spécifications

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)
RS-232 Port DCE
USB Port Micro-B
Temperature Range -40° to +60°C
Communication Rate
  • 1200 to 57,600 bps (RS-232 DCE Port)
  • 9600 to 460.8 kbps (CS I/O Port)
Current Drain
  • 1.5 mA (@ 12 Vdc when idle)
  • 40 mA (@ 12 Vdc during GPS fix)
  • 35 mA (@12 Vdc during transmit)
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.)

Sensor Interface

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)

Radio Interface

Channels Available TX, PTT, switched battery, ground
RCFSK Modulation 100 to 1000 mV, ±50 mV (software selectable)

Standards

ALERT2 ALERT2 IND API Specification Version 2.0 (as released by the ALERT2 Technical Working Group dated June 2020)
Compliance RoHS and CE
Product Standard EN 61326-1:2013
Test Standards
  • IEC 61000-4-2, Electrostatic Discharge Immunity
  • IEC 61000-4-3, Radiated RF Immunity
  • IEC 61000-4-4, Electrical Fast Transients Immunity
  • IEC 61000-4-5, Surge Immunity
  • IEC 61000-4-6, Conducted RF Immunity
  • CIPSR 11, Class B Emission

Applications

Panama Canal: Upgraded Flood Warning System
The Panama Canal was using an outdated water-level system until the Panama Canal Authorities (ACP)......En savoir plus
Texas: Transitioning to ALERT2
ALERT2 is a modern communication protocol that improves upon 40 years of tradition within the......En savoir plus

Articles et Communiqués de presse