• Features four analog inputs, one digital input, and one RS232 input;

• Automatic recognition of connected sensors;

• Dedicated input for serial sensors;

• Extremely low power consumption with integrated batteries;

• Supports up to 50 measurements combining sensor acquisition and derived quantities;

• Includes an internal library for calculating derived quantities, alongside mathematical and statistical operations;

• Equipped with 8 MB Flash Memory;

• Supports Modbus-RTU Master/Slave and TTY protocols;

• Provides two RS232 ports;

• Sensor acquisition rate configurable from 1 second to 12 hours;

• Statistical elaboration rate adjustable from 1 second to 12 hours;

• PC connectivity via RS232 (USB/Ethernet with external accessories);

• Features a built-in display and keyboard;

• Model code: ELO009.

Other Highlights

Inputs for serial sensors

The M-Log COM-2 port offers connectivity for hot wire anemometers or sensors utilizing the Modbus-RTU protocol.

Sensors acquisition rate

The acquisition rate is individually programmable for each input, ranging from 1 second to 12 hours. M-Log processes data from 4 analog input channels and 8 derived quantities every second. To mitigate energy consumption from sensors that require power supply, an advanced power supply setting can be configured from the acquisition event (warm-up), which then deactivates immediately after the acquisition completes.

Data elaboration

Raw measured values can be stored directly as instantaneous readings, or as statistical processes (1 base, from 1 second to 12 hours), including:

• Average, minimum, maximum, standard deviation;

• Wind elaborations;

• Totals.

Derived and calculated quantities

An internal library of formulas for various environmental quantities is provided. These calculations leverage acquired quantities, user-defined constant values, and other previously calculated quantities. The library also incorporates mathematical functions. M-Log supports up to 50 channels, encompassing acquired, derived, and calculated quantities.

Data memory

The internal 8MB memory typically holds data for several weeks. The registration structure operates in a circular fashion. For the ELO009 model with MiniDIN inputs, data is organized into “surveys” with sequential numbering, along with start/end date and time.

Data communication

Data transfer to a PC is possible via RS232, USB (with included adapter), or over Ethernet using an external converter. M-Log employs a proprietary binary protocol for data transmission with LSI LASTEM communication programs: 3DOM and CommNET.

Measurements

M-Log units can be connected to a broad spectrum of sensors for various environmental parameters, such as:

• Air Temperature and Relative Humidity;

• Black globe Temperature;

• Wet Temperature;

• Surface and materials Temperatures;

• Air Speed;

• Light;

• Pollution (IAQ);

• Thermal Flow and Radiant Asymmetry. LSI LASTEM offers a wide array of compatible sensors; please consult the LSI LASTEM catalogs for more details.

Derived Quantities

Our data loggers are equipped with an internal library of formulas for computing a range of environmental quantities. These quantities are derived from measured parameters, values entered by the operator, and other calculated quantities.

• Absolute Humidity (VDI3786 Part 4);

• Air Changes (1997 Ashrae Fundamentals Handbook);

• Air Flow (1997 Ashrae Fundamentals Handbook);

• Air Speed (using Pitot and Darcy Tubes);

• Absolute Pressure (sea level);

• Dew Point (ISO7726);

• Heat Index;

• Evaporation;

• Mean Radiant Temperature (ISO7726);

• Radiant Temperature Asymmetry (ISO7726);

• Operative Temperature (ISO7726);

• Plane Radiant Temperature 1&2 (ISO7726);

• Partial vapor Pressure;

• Psychrometric Humidity (ISO7726);

• Specific Humidity (VDI3786 Part 4);

• Sunshine Duration;

• TCH – Chill Temperature (ISO TR11079);

• Wet Bulb Temperature (ISO7726);

• UV Exposition;

• UV Index;

• Wind Chill Index (ISO TR11079) – ELO008, ELO009;

• WBGT Index IN+OUT Formulas (ISO7243) – ELO008, ELO009;

• % dissatisfied by Floor Temperature (ISO7730) – ELO009;

• % dissatisfied by Vertical Temperature (ISO7730) – ELO009;

• % dissatisfied by Radiant Asymmetry (ISO7730) – ELO009;

• % dissatisfied by Air Draw (ISO7730) – ELO009;

• Daylight Factor (IESNA Lighting Handbook) – ELO009;

• Light Intensity (IESNA Lighting Handbook) – ELO009;

• Estimated Natural Decay of SARS-CoV-2 on Surfaces – ELO008, ELO009;