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OMNIALOG GT-2400
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OMNIALOG GT-100D
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CPU AND MEMORY
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Processor
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ARM Cortex-M3 MCU with 1 MB Flash, 120 MHz CPU, ART Accelerator, Ethernet
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RAM Memory
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1 Mbyte RAM with backup
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Mass storage
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SD CARD 32 GB (*) and WEB pages
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Clock accuracy
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High precision RTC (real time clock with battery back-up) self compensated in temperature (3ppm @ 25°C, 10ppm @ -30 +70°C)
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On-board sensors
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Temperature measured on the electronic board (accuracy ±1%)
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INPUT
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Analog differential inputs
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24 differentials individually configured. Channel expansion provided by SISGEO multiplexers
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INTERFACES
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Digital inputs
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Two opto-isolated digital inputs individually selectable for switch closure, high frequency pulse and trigger. Independent 32-bit counters for each input. Max Input Voltage: 24V (Max Current: 10mA) Min Input Voltage: 5V (Max Current: 2mA)
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Display & Keyboard
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Small backlight graphic LCD 128x64 dpi with membrane keyboard for the minimal local management without the PC. Keyboard for start a uniscan, sequential display of the last memorized readings for each channel (sensor ID, converted unit reading, UM), device status, data download and FW/web pages update by USB pen drive, safe mode (back-up/format/restore internal SD card)
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LAN ethernet isolated
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10/100 Mbps, RJ45
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RS232
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9-pin, DE9: DCE port for GSM/GPRS modem connection Baud Rates: selectable from 9600 bps to 115.2 kbps (default setting) Default Format: 8 data bits; 1 stop bits; no parity
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USB
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USB 2.0 flash drive only (FAT 32), 5 V 200 mA
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RS485#1 opto-isolated
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5 screw clamp: DCE port for max. No.250 SISGEO digital sensors Communication interface: RS485 Communication protocol: MODBUS RTU (SISGEO Protocol) The voltage ‘V OUT’ is switched on and off under program control. V OUT is the unregulated input power supply ‘V IN’ (1 A) Power supply management (always on or energy safe)
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RS485#2 opto-isolated
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5 screw clamp: DCE port for max. 16 SISGEO multiplexer boards connection. Communication interface: RS485 Communication protocol: MODBUS RTU (SISGEO Protocol) The voltage ‘V OUT’ is switched on and off under program control. V OUT is the unregulated input power supply ‘V IN’ (1 A) Every channel of each multiplexer board is completely independent.
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SWITCHED OUTPUT POWER SUPPLY
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The voltage ‘V OUT’ is switched on and off under program control. V OUT is the unregulated input power supply ‘V IN’ (2 A)
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ANALOG MEASUREMENTS
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Measurement rate (MR)
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High precision measurement (low speed, 5 sps): Init. analog (with auto-calibration): 27.80 sec Instrument warm-up: depending on sensor configuration Measurement: 5.41 sec Standard measurement (20 sps): Init. analog (with auto-calibration): 7.1 sec Instrument warm-up: depending on sensor configuration Measurement: 1.57 sec Fast measurement (High speed 40 sps): Init. analog (no auto-calibration): 2.65 sec Instrument warm-up: depending on sensor configuration Measurement: 0.45 sec Note1: times indicated not valid for vibrating wire measures Note2: init. analog phase is made only one time before the measurement cycle
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Type of measurements
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mA, mV, V, mV/V, °C, Hz (µsec, digit)
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ADC
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24-bit (22 true bit) differential Analog-to-Digital Converters, 5SPS, 0-24 Average Function, auto-calibration and auto-range
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Range and power supply
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Current loop (2 wires): range 0÷25 mA Power supply (selectable by the software, up to 100 mA): 24V DC, 10V DC, external Transmitter (3-4 wires): range 0÷25mA Power supply (selectable by the software, up to 100 mA): 24V DC, 10V DC, external Voltage (4 wires): range ±100mV, ±1V, ±10V Power supply (selectable by the software, up to 100 mA): 24V DC, 20V DC, 10V DC, 5 V DC ,external Servo inclinometer: range ±5V Power supply (selectable by the software): ±12V DC (dual), external Wheatstone bridge (6 wires, with sensing): range ±10mV/V Power supply (selectable by the software, up to 80 mA): 10 V DC , 5 V DC, external (max 10 Vdc) Maximum bridge resistance: 10 kΩ Minimum bridge resistance: 200 Ω Platinum RTD (Pt100): range -150°C to +150°C Power supply: 1.2 mA Potentiometer: range ±2.5V Power supply (selectable by the software): 10V DC, 5V DC Thermistor (NTC): range -50°C to +150°C Power supply: 0.05mA / 0.1mA / 1.2mA Vibrating Wire: range 400Hz to 6000Hz Excitation sine wave signal (adaptive): ±10 V
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Reading resolution
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1 µA at range 20 mA 10 µV at range ±100 mV - 100 µV at range ±1 V 1 mV at range ±10 V - 0.1 °C for Pt100 - 0.1 °C for NTC 0.1 Hz at range 6000 Hz - 0.001 mV/V at range ±10 mV/V
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Measurement accuracy
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0.01% F.S. (0.1% F.S. for Pt100 and NTC) with Standard Measurement Calibration in Sisgeo laboratories recommended every 2 years
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Temperature drift
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< 10 ppm / °C, range -30°C to +70°C
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Input noise voltage
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5,42 µVpp
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Input limits
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±12V
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Sustained input voltage w/o damage
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±50V DC max
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DC common mode rejection
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>105dB
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Normal mode rejection
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>90dB
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Input impedance
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20 MΩ typical
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OUTPUT
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Digital output
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One relay output (for alarm, etc.): volt-free closure (low voltage 30V, 2A)
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DIGITAL INPUTS
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Measurement rate (MR)
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Max frequency 1kHz
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Accuracy
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0.1 Hz
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PROTECTIONS
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Electro-mechanical relays for each measuring channel: Electrical endurance: min. 2x105 operations, Mechanical endurance: 10x108 operations. Circuit protection: Gas Discharge Tubes (GDT): DC Breakdown Voltage 75V (± 20%@100V/µs) Impulse Breakdown Voltage 250V (@100V/µs ) typical Overvoltage and reverse polarity protection on power supply input. Short circuit protection on every outputs of sensor power supply.
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SYSTEM POWER REQUIREMENTS
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Voltage (external power supply)
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10 to 30 V DC (reverse polarity protected), max 5 A
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External rechargeable batteries
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12V DC nominal
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Typical current drain
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Sleep mode: 100 µA ON: 62 mA - ON with ethernet connected: 87 mA - ON with display ON: 115 mA ON with display ON and ethernet connected: 142 mA Analog initialisation: 115 mA Measurement: 123 mA (with 12 mA @ 24 V sensor consumption)
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ENVIROMENTAL CONDITIONS
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Operating temperature
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-30 to +70°C (display -20 to +70°C)
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Storage temperature
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-40 to +85°C (display -30 to +80°C)
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Humidity
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80%
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Overvoltage category
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II
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Pollution degree
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2
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Sound levels
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< 74dBA
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Maximum height of use
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3000m
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