The Geolux SmartObserver data logger is a highly integrated device designed to facilitate data acquisition from various instruments and transmit it to the Geolux Hydroview cloud-based data management software. Its primary function is to act as a central hub for environmental monitoring, collecting data from attached sensors and ensuring its reliable delivery for analysis and storage. The device leverages GPRS connectivity for data transmission to the server, with additional communication options like LoRaWAN available on demand, offering flexibility in deployment scenarios.

Function Description

The SmartObserver data logger serves as a crucial component in remote monitoring stations, enabling the collection and transmission of environmental data. It is engineered to read data from a diverse range of attached instruments through multiple communication interfaces. The device's core functionality revolves around its ability to interface with sensors, process the collected data, and then securely transmit it to a central server. This ensures that users have access to real-time or near real-time data for various applications, including hydrological monitoring, meteorological stations, and other environmental sensing needs.

A key feature of the SmartObserver is its integrated power management system. This system is designed to optimize battery life and ensure continuous operation in remote locations where a stable power grid might not be available. It includes a battery charger that allows direct connection to external power sources such as solar panels or small wind turbines, alongside a battery. The data logger intelligently manages battery charging, eliminating the need for separate charging units. It supports various battery types, including lead-acid, NiMH, NiCd, LiFePO4, and Li+, providing versatility for different power setups.

The data logger also incorporates internal Flash memory, which acts as a data storage backup. This is particularly useful in situations where wireless communication might be temporarily disabled. Data collected during such periods is stored internally and can be retrieved later by connecting the data logger to a PC via an RS-232 interface. This ensures data integrity and prevents loss of valuable measurements even during communication outages.

Usage Features

The SmartObserver data logger offers several features that enhance its usability and adaptability in various field applications:

Multiple Communication Interfaces: The device is equipped with a comprehensive set of communication interfaces to interact with a wide array of instruments. These include two RS-232 lines, two CAN bus lines, two RS-485 (Modbus) lines, an SDI-12 interface, two general-purpose digital inputs, two general-purpose digital outputs, two analog voltage inputs, a 4-20 mA interface, and an analog voltage output. This extensive range of interfaces allows for seamless integration with different types of sensors and measurement devices.
Instrument Power Management: To conserve battery power, the SmartObserver features three output power lines (PWR1, PWR2, and PWR3) that supply power to connected instruments. The data logger can intelligently shut down these power lines between periodic measurements, significantly extending battery life. Furthermore, secondary output power lines can be configured to power up conditionally, allowing for even greater power savings. For example, specific instruments like surface velocity radars can be disabled when a level meter detects a dry riverbed, optimizing energy consumption.
GPRS Connectivity: The primary method for data transmission to the Geolux Hydroview server is through GPRS. This requires the insertion of a micro SIM card and the attachment of a GPRS antenna. The device's GPRS settings, including APN, username, password, DNS, server address, and script path, are configurable, ensuring compatibility with various mobile operators and network configurations.
PC Configuration Utility: The Geolux Instrument Configurator is a user-friendly PC application that allows users to set up and manage the SmartObserver data logger. This utility connects to the data logger via an RS-232 serial cable and provides an interface to configure operating parameters, view stored data, and perform diagnostics.
Date and Time Setting: The internal clock of the data logger can be set using the PC configurator. It's important to note that the data logger relies on continuous power to maintain its internal clock, and disconnecting it from the battery will reset the time and date.
Alerts on Digital Input Changes: The device can be configured to monitor changes on its digital inputs. When a change is detected, the data logger can connect to the server and send an alert, providing immediate notification of critical events.
Modem Connection Options: Users can configure the modem to connect to either a standard GSM/GPRS mobile network or an LTE-M connection, depending on the SIM card's capabilities and network availability.
Mobile Operator Lock: This setting controls the GPRS modem's behavior when the home mobile network is unavailable. Options include "Default" (connect to any available network), "Disable roaming" (prevent roaming charges), and "Lock to operator" (connect only to the home network).

Maintenance Features

The SmartObserver data logger includes several features that aid in maintenance, diagnostics, and troubleshooting:

LED Indicators: A series of LED indicators on the data logger provide useful diagnostic information. These include LEDs for internal power supply status, RS232-1 TX/RX activity, RS485-1/2 TX/RX activity, CPU data activity (indicating operational CPU and instrument communication), PWR1/2/3 output power line status, and GSM/GPRS modem activity (ACT for network communication and STAT for data transfer status). These indicators allow for quick visual assessment of the device's operational state.
Firmware Updates: The Geolux Instrument Configurator utility allows users to update the firmware of the device, ensuring that the data logger benefits from the latest features and bug fixes.
Parameter Export and Storage Management: Users can export current settings to a .txt file for backup or record-keeping. The utility also provides options to view storage overview (data count, first/last data timestamps), reset the entire storage, or download stored data, facilitating data management and recovery.
Status Monitoring in PC Utility: The "Status" tab in the Geolux Instrument Configurator provides real-time information, including GPRS modem signal strength (displayed as a progress bar), device ID, connected device information, instrument readings, power status (input voltage, charging current, battery voltage), and modem status. This comprehensive overview aids in diagnosing connectivity and operational issues.
Raw Data View for Debugging: The "Raw Data View" tab in the configurator allows users to view debug messages sent by the SmartObserver. By selecting specific debug flags, users can monitor detailed internal processes, which is invaluable for advanced troubleshooting.
SMS Diagnostics: For remote diagnostics, the data logger supports SMS commands. Users can send a question mark (?) to the data logger to receive a response detailing modem status and data logger parameters. Specific SMS commands can also be used to reset saved measurements (RESET MEASURSTORAGE), perform a hard reset of the SmartObserver (RESET LOGGER), or change data logger parameters (CONFIG,=,...). This allows for remote configuration and troubleshooting without physical access to the device.
Battery Settings Configuration: The PC utility allows for precise configuration of battery charging parameters, including maximum charge current, maximum charge voltage, MPPT voltage (for solar panels), and no-charge temperature. These settings are crucial for protecting the battery and ensuring its longevity, requiring users to consult battery data sheets for correct values. The charging function can also be enabled or disabled.
Troubleshooting Guide: The manual provides a detailed troubleshooting section addressing common issues such as connection problems with the PC application, modem signal issues, and camera connectivity problems, offering step-by-step solutions.

Geolux SmartObserver - Raw Data View Tab

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