
Alpha-Log
Alpha-Log is the most powerful data logger in the LSI Lastem family. With 400MB of internal memory and the removable memory up to 32GB it is suitable also in complex systems
The data logger for meteorological monitoring
E-log has been explicitly designed for environmental applications: it is equipped with specific inputs for a wide range of sensors and calculations of derived quantities. E-Log stores the data from the connected sensors and supports different communcation protocols both in input and output. Robust and reliable, E-Log makes measurements possible even in the most severe environments, while the 16-bit A/D converter ensures accurate and reliable data in classic meteorological, hydrological and air quality applications and – more generally – in any environmental application.
• N. 8/16 analog inputs, n.4 digital inputs,;
I• nput extension using MASTER/SLAVE configurations;
• Extremely low power consumption;
• N. 99 measurements between channels for sensor acquisition and derived quantities;
• Internal library for calculating derived quantities and mathematical calculations;
• 8MB Flash Memory;
• Modbus-RTU Master/Slave, TTY protocols;
• Model with Zig-Bee 2,4 GHz Radio for radio sensor reception and from other modules (ELO3515)
• Transmission (push) of data in ASCII format with FTP protocols;
• N. 2 RS232 ports (ELO3305);
• N. 1 RS232 port and N. 1 RS485 port (ELO3305.1);
• Digital outputs to implement external devices with programmable logics or events;
• Acquisition rate from 1 s to 12 hours;
• Elaboration rate from 1 s to 12 hours;
• Connection to the PC via RS232 (USB/Ethernet/Modem GPRS with external accessories);
• Display and keyboard.
| Code | ELO3305 | ELO3515 | ELO3305.1 | |
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| Description | E-Log data logger. N.12 inputs by terminal block | |||
| Inputs type | Terminal block | |||
| Analog inputs | N.8 differential (N. 16 single-ended) | |||
| Digital inputs | N.4 (on/off or frequency/counter) | |||
| Serial Ports | N.2 RS232 | N.1 RS232 N.1 RS485 |
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| • Type: ZigBee • Frequency: ISM 2.4 GHz direct sequence channels • Power:10 mW (+10 dBm) |
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| Sensor’s auto-recognition | NO | |||
| On/off outputs | YES | |||
| Back-lit display | NO | |||
| Threaded slot for tripod fixing | NO | |||
| Internal battery | NO | |||
| Plug for power battery charger | YES | |||
| Included accessories | RS232/USB adapter, RS232 cable, DIN-bar mounting | RS232/USB adapter, RS232 cable, DIN-bar mounting, adapter for RS485 cable wires |
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| Analog inputs | Range | Resolution | Accuracy (@ 25°C) |
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| Volt | -300…1200 mV | 40 µV | ±100 µV | |
| ±78 mV | 3 µV | ±35 µV | ||
| ±39 mV | 1.5 µV | ±25 µV | ||
| Pt100 | 50…125°C | 0.003°C | ±0.05°C | |
| -50…600°C | 0.013°C | ±0.11°C | ||
| Resistances | 80…140 Ω | 0.0013 Ω | ±0.02 Ω | |
| 80…320 Ω | 0.005 Ω | ±0.05 Ω | ||
| 0…6000 Ω | 0.19 Ω | ±1.5 Ω | ||
| Thermo-couples | E-IPTS 68 -200…1000°C | <0.1°C | ±1.5°C | |
| J-IPTS 68 -50…600°C | <0.1°C | ±1.2°C | ||
| J – DIN -50 … 600°C | <0.1°C | ±1.2°C | ||
| K-IPTS 68 -150…1350°C | <0.1°C | ±1.9°C | ||
| S-IPTS 68 0…1600°C | 0.22°C | ±4.9°C | ||
| T-IPTS 68 -200…200°C | <0.1°C | ±1.4°C | ||
| Inputs number | N.8 differential (N.16 single-ended) | |||
| Voltage clamping | ±2.5 V | |||
| ESD protections (complies standards) |
IEC 61000-4-2 Contact Discharge ±12 kV IEC 61000-4-2 Air-Gap Discharge ±15 kV IEC 61000-4-5 Surge 3.0 A (8/20 µs) |
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| EMC filter | X2Y filters on all inputs | |||
| Channel to Channel crosstalk |
-80 dB | |||
| Temperature error (@-10…30°C) |
300…1200 mV < ±0,01% FS ±39 mV < ±0.01% FS ±78 mV < ±0.01% FS |
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| Digital inputs | Inputs number | N.4 | ||
| Mode | • N.2 input for sensors with optoelectronics (freq. max 10 kHz) • N.2 Frequency input (freq. max 5 kHz) • N.4 Logic state input ON/OFF (they acquire signals 0 … 3 Vdc) |
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| Max input freq. | 5 kHz | |||
| Accuracy | 3 Hz @ 5 kHz | |||
| Protections (power) |
Peak pulse power: • 600 W (10/1000 μs) • 4 kW (8/20 μs) |
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| Protections (complies standards) |
IEC 61000-4-2 level 4: • 15 kV (air discharge) • 8 kV (contact discharge) IEC 61000-4-5 MIL STD 883G, method 3015-7: class 3B • 25 kV HBM (human body model) |
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| Switched power supply outputs |
Number | N.7 (with programmable switching-on time before sensor acquisition) | ||
| Max total current | On a single output: 1.1 A Total for all outputs: 7.7 A |
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| Voltage clamping | +33 V | |||
| Protections | On each output: PTC overcurrent protections (resettable) max 1.1 A | |||
| Protections (power) | Peak pulse power: • 600 W (10/1000 μs) • 4 kW (8/20 μs) |
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| Protections (complies standards) |
IEC 61000-4-2 level 4: • 15 kV (air discharge) • 8 kV (contact discharge): IEC 61000-4-5 MIL STD 883G, method 3015-7: class 3B • 25 kV HBM (human body model) |
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| RS-232-485 ports | Number/type PN:MDMMB1110 |
N.2 RS-232 ports (N.1 for system setup and data display by PC, N.1 for Modbus-RTU output) |
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| Number/type PN:MDMMB1110.1 |
N.1 RS-232 for system setup and data display by PC N.1 RS-485 for Modbus-RTU output (with isolated 12V@160 mA) |
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| Speed | 1200…115200 bps | |||
| Type | Db-9 pin/male/female/DCE | |||
| Voltage clamping | ±15 V | |||
| Protections (power) | Peak pulse power: • 600 W (10/1000 μs) • 4 kW (8/20 μs) |
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| Protections (complies standards) |
IEC 61000-4-2 level 4: • 15 kV (air discharge) • 8 kV (contact discharge): IEC 61000-4-5 MIL STD 883G, method 3015-7: class 3B • 25 kV HBM (human body model) |
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| Others | Standard | EN 61326-1 2013 , EN 61010-1 2013, EN 50581 2013 | ||
| Watch | Accuracy: 30 s/month (@ 25°C) | |||
| Keyboard | N.4 keys | |||
| Processor | 2 RISC 8 bit, clock 16 MHz | |||
| A/D converter | 18 bit resolution (rounded to 16 bit) | |||
| Sample duration | (rejection 50/60 Hz): 80 ms@rejection 50 Hz | |||
| Data memory | Flash EEPROM 8 Mb | |||
| Environm.limits | -30…70°C, 15…100 % RH (without water condensation) | |||
| Physical protection |
Conformal coating on the electronic board to protect the board’s components against moisture, dust, chemicals, and temperature extremes | |||
| Protection grade | IP 40 | |||
| Weight | 720 g | |||
| Dimensions | 242 x 108 x 80 mm | |||

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