Wireless Data Logger ALMEMO® 470-1

Technical Features

ALMEMO® 470-1 wireless data logger
The professional measuring instrument ALMEMO® 470‑1 is a professional wireless data logger, which receives the measured values with timestamp from wireless sensors that are positioned remotely, saves the measured values and shows them on graphical display. The acquisition of the measured values occurs in a cycle that can be individually adjusted to each wireless sensor: for measurements, e.g. in climate chambers, for long term measurements with wireless sensors in sleep mode, e.g. for monitoring the room air condition or environmental measurements. The data logger ALMEMO® 470‑1 is intended to be mounted on a wall. The power is supplied via an external mains unit. An additional rechargeable battery in the device serves as a temporary buffer in case of power failure or during a brief mobile usage.

Reliable radio transmission build upon a star-shaped and meshed net structure
To provide wireless communication, the data logger ALMEMO® 470-1 operates in the 2.4 GHz frequency band. To increase the wireless range and the transmission reliability, the wireless sensors automatically configure themselves as a star-shaped and meshed net structure. Repeater functionality is integrated in each wireless sensor by default, so the sensor can forward data from adjacent wireless sensors to the data logger. This means that more distant sensors, which do not have a wireless connection to the data logger, can still be integrated into the wireless net. The transmission power of the network is configurable in the data logger to 1, 10, or 100mW such that local networks in the immediate neighbourhood as well as long distance networks are possible.

Wireless ALMEMO® sensor for temperature, atmospheric humidity, and atmospheric pressure.
The wireless sensors operate with a plugged-on digital multisensor module for temperature, atmospheric humidity, and atmospheric pressure. The sensor module has a data medium on which all sensor specific data, such as serial number, adjustment data, and calibration data, is saved. The sensor module can therefore be replaced any time.

For monitoring the room air condition or with extended operating temperature range from -40 to +85 °C.
The standard version of the wireless sensor is used for monitoring the room air condition. The version with an extended operating temperature range from -40 to +85 °C and splash water protection is used e.g. for measurements in conditioning and climate chambers or for outdoor tasks in the environmental measurement technology.

Wireless ALMEMO® Sensor for indoor air quality: carbon dioxide, air temperature, air pressure.
The wireless sensors operate with a built-in sensor module for carbon dioxide, air temperature and air pressure. This allows simultaneous assessment of air quality by measuring CO2 concentration and occupancy quality (comfort) by measuring air temperature. If several wireless sensors are distributed in the room, a meaningful room profile can be created via the timesynchronous measurement; There is no need for complex wiring!

Wireless ALMEMO® interface for ALMEMO® D6 and D7 sensors. For a vast variety of measurable variables.
The digital wireless interface broadens the range of applications considerably. Almost all ALMEMO® D6 and D7 sensors for various measurable variables can be connected via the integrated ALMEMO® input socket to the wireless interface and their measured values can be transferred over the air to the wireless data logger. This way the amount of CO2 in the atmosphere, surface temperatures on objects, or the illuminance at measuring locations can be recorded.

Power supply of the wireless sensors and the wireless interfaces
The wireless sensors and the interfaces are supplied by an integrated rechargeable battery. The rechargeable battery can be charged via the integrated micro USB port. A continuous power supply via mains unit is possible as well.

Long runtimes in battery mode with activated sleep mode
For long-term applications, the measured values are recorded in the wireless sensor or wireless interface with a large measuring cycle and transmitted to the data logger. For battery operation, significantly extended runtimes are achieved by using the sleep mode. In this energy saving mode, the power supply and the plug/sensor supply are switched automatically. In sleep mode, the wireless sensor cannot operate as a repeater (only possible in
continuous operation).

Visualise measuring data on the data logger
To visualise measuring data, the display of the data logger features a list of the measuring channels as well as a single measurement value display. In addition, the user can configure his own individual display as a customer specific user menu on the data logger by only adding his own selection of measuring channels.

Evaluation and storage of the measured data.
Via an external PC measured data is recorded and visualised by the WinControl software. The data logger ALMEMO® 470-1 and the PC are either connected via USB interface or via Ethernet interface. An industrial SD card integrated in the data logger ensures a safe storage of the measured data. Additionally, the actual measured data is cached in every wireless sensor to make sure that the complete measured data is available also in case of a short-time failure of either the wireless connection or the data logger.

Configuration of the wireless system
The sensors in the wireless network are configured and managed on the data logger ALMEMO® 470-1 via the clear touch display. Various functions are available, e.g. to couple and de-couple the wireless sensors with the data logger or to configure the cycles and limit values of the wireless sensors. In addition, it is possible to add a comment to every wireless sensor to be able to assign a particular measurement point to the sensors. The program ALMEMO® 470 Mesh-Viewer makes it possible to display the signal strength of every single sensor node / wireless sensor as well as the entire network topology on the PC. This, in combination with the configurable signal strength in the data logger, enables a fast and optimal installation of the wireless network.

Accessories for installing the components for different applications
Thanks to an integrated holder, the data logger ALMEMO® 470‑1 can be mounted to the wall. Regarding the wireless sensors, different accessories for mounting the sensors are available: wall mount, suction cup fastening, magnetic mount, or rope to hang the sensors.