OM-240 is a versatile, high accuracy “smart” data acquisition system. It provides 24 differential analog inputs, individually configured.
OM-240 Overview
The Data Logger can be used in a wide range of applications, including HVAC, Oil and
Gas, Water Quality, Energy and Building Monitoring. Using OM-240 requires no additional
configuration/analysis software package, as it is provided by an Embedded Web Server.
Only a standard Web Browser (Firefox recommended) for configurations and data
view. Logged Data is ready to be shown in a graphic “real time” mode (License required) or
exported in a CSV file. Channel expansion provided by multiplexers. There are 8 terminal
blocks (each terminal block can handle up to 3 sensors). The OM-240 is designed to work
with 2 to 6-wire sensors. You can connect 2-wire sensors on each channel and read 24 sensors,
or 4-wire sensor and read 12 channels. The system will order sensors depending on
how many wires they use, placing 6 wires sensors first, 4 wires in the middle, and 2 wires
last.
OM-240 Charting
Once software configuration is done, clicking on “Wiring scheme” button on the web interface
near the sensors will show how to connect the chosen sensor to the block physically. It
shows “relative” position, so if you start connecting sensors from the first, you will not have to leave “unused” positions (except for the ground connection of every block, if not used).
Multiplexers are needed if the total “wires” from sensors exceeds the 48 provided by the
OM-240.
Applications including Oil/Gas Pipeline Monitoring, Building/Bridge Structure Health Monitoring, Engine Thermal Mapping Testing, Data Center Environmental Monitoring, and Energy Farm Monitoring, and etc.
Specifications Weight 980 g (2.16 lb) Dimensions: 231 L x 138 W x 117 mm H (9.09 x 5.43 x 4.61”) Material: Plastic and metal Wiring: Removable screw terminal connectors MEASUREMENT RATE Analog Initialization (±10V range): Maximum Speed: 1.70 sec Standard Speed: 7.10 sec Instrument Warm-Up: Depends on sensor configuration Measurement (±10V range: Maximum Speed: 80 ms Standard Speed: 1.57 sec Notes: Times indicated are not valid for vibrating wire measures
Init analog phase is made only once before measurement cycle Measure Frequency Selectable (Global or for Each Channel): 1 second up to 1 week ADC: 24-bit (22 true bit) differential analog-to-digital converters, 5SPS to 1000SPS, 0-24 average
function, auto-calibration and auto-range CPU and MEMORY Processor: ARM Cortex-M3 MCU with 1 MB Flash, 120 MHz CPU, ART Accelerator, Ethernet RAM Memor 1 Mbyte RAM Mass Storage: 2 GB SD card for data (about 5 Mega data points) and Web pages Clock Accuracy: RTC (real time clock with battery back-up) temperature compensated On-Board Sensors: Temperature (accuracy ±1%), measured inside the datalogger Switched Output Power Supply: The voltage ‘V OUT’ is switched on and off under program
control. V OUT is the unregulated input power supply ‘V IN’ (2 A Max) SOFTWARE and FIRMWARE Web Server on Board: (independent OS platform) Acquisition Time Interva: Selectable from 1 second up to 1 week (depends on the number of channels acquired) FTP client: To send data/alarms on an FTP server (SFTP not supported) MAIL to send data/alarm: To max 5 email address (SMTPS / SSL not supported) SMS to Send Alarms: To max 5 telephone numbers Data Download: (measure, logs) in .csv file (compatible with Microsoft Excel) Virtual Channels Management: For Math operations between channels
OM-240 Thermocouple Input Setup
ANALOG INPUTS
Thermocouple, RTD (Pt100, Pt200, Pt500, Pt1000), Thermistor, Current Loop, Current
Transmitter, Voltage, Servo Inclinometer, Wheatsonte Bridge, Potentiometer, Vibrating Wire Temperature Drift: < 10 ppm/°C, range -30 to 70°C (-22 to 158ºF) Input Noise Voltage: 5.42 µV pp Input Limits: ±12V DC Common Mode Rejection: >105 dB Normal Mode Rejection >90 dB Input Impedance: 20 MΩ typical
THERMOCOUPLES Thermocouple Types: K, B, J, T, E, R, N, S Resolution: 1 µV at FS for ±10 mV range;
10 µV at FS for ±100 mV range;
100 µV at FS for ±1 V range;
THERMOCOUPLE (@25°C)
TC TYPE
RANGE
ACCURACY
K
-200 to 1370°C
(-328 to 2498°F)
±1,99 °C
B
600 to 1820°C
(1112 to 3308°F)
±1,22 °C
J
-200 to 1200°C
(-328 to 2192°F)
±1,04 °C
T
-200 to 400°C
(-328 to 752°F)
±1,99 °C
E
-200 to 1000°C
(-328 to 1832°F)
±0,93 °C
R
-20 to 1760°C
(-4 to 3200°F)
±1,64 °C
N
-260 to 1300°C
(-436 to 2372°F)
±1,24 °C
S
-20 to 1760°C
(-4 to 3200°F)
±1,64 °C
RTD
RTD Types: Pt100/200/500/1000 Resolution: 0.1°C Power Supply: 1.2mA
RTD
TYPE
RANGE
ACCURACY
Pt100/200/500/1000
-195 to 1370°C
(-319 to 1556°F)
0.17% FS
THERMISTOR
Thermistor Type: 3000 O @25°C, NTC Resolution: 0.1°C Power Supply: 0.05mA, 0.1mA, 1.2mA
THERMISTOR (NTC)
TYPE
RANGE
ACCURACY
3000 O@25°C, NTC
-50 to 0°C
±2 °C
(-58 to 32°F
±3,6 °F
0 to 150°C
±1 °C
(32 to 302°F)
±1,8 °F
DC VOLTAGE INPUT
Power Supply: 5V, 10V, 20V, 24V DC*
"VOLTAGE
"
RANGE
RESOLUTION
ACCURACY
±10 mV
1 µV at FS
0.01% FS
±100 mV
10 µV at FS
±1 V
100 µV at FS
±10 V
10 mV at FS
DC CURRENT INPUT
Power Supply: 10V, 24V DC*
CURRENT LOOP 2W
RANGE
RESOLUTION
ACCURACY
4 ~ 20mA
1 µA at FS
0.01% FS
CURRENT TRANSMITTER (3-4W)
RANGE
RESOLUTION
ACCURACY
4 ~ 20mA
1 µA at FS
0.01% FS
WHEATSTONE BRIDGE
Power Supply: 5V, 10V, External (Max 10V)* Minimum Bridge Resistance: 200 O
WHEATSTONE BRIDGE
RANGE
RESOLUTION
ACCURACY
±10 mV/V
0.001 mV/V at FS
0.01% FS
DIGITAL I/Os
Digital Output One relay output (for alarm, etc.): volt-free closure (low voltage 30V, 2A) Digital Inputs Two opto-isolated digital inputs individually selectable for switch closure. Max Input Voltage: 24V (max current: 10mA) Min Input Voltage: 5V (max current: 2mA) Measurement Rate: max frequency 1 kHz Accuracy: 0.1 Hz PROTECTIONS Electro-Mechanical Relays for Measuring Each Channel Electrical Endurance: min 2 x 105 operations Mechanical Endurance: 100 x 106 operations. Circuit Protection (Gas Discharge Tubes) DC Breakdown Voltage (@100V/s): 75V Tolerance of DCBV: ± 20% Impulse Breakdown Voltage (@100v/µs ): 250V Impulse Breakdown Voltage (@1kv/µs ): 525V Overvoltage and Reverse Polarity Protection Short Circuit Protection on Every Output INTERFACES Display & Keyboard Small backlight graphic LCD 128 x 64 dpi with membrane
keyboard for the minimal local management without the
PC. Keyboard for starting a data acquisition scan, sequential
display of the last stored readings for each channel (sensor
ID, converted unit reading, unit of measure), device status,
data download and firmware/Web pages update by USB
pen drive, safe mode (back-up/format/restore internal SD
card). LAN Ethernet
10/100 Mbps, RJ45, Isolated RS232
9-pin, DE9. DCE port for optional GSM/GPRS modem connection Baud Rates: selectable from 9600 bps to 115.2 kbps Default Format: 8 data bits; 1 stop bits; no parity USB
USB 2.0 pen drive only (FAT 32), 5 V 200 mA RS485#1 AND RS485#2 Connection: 5 screw clamp port for max. No.254 Modbus RS485 digital bus sensors Communication Interface: RS485 - Optoisolated Communication Protocol: MODBUS RTU Voltage ‘V OUT’: 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
Every channel of each multiplexer board is completely independent. SYSTEM POWER REQUIREMENTS Voltage (Power Supply): 10 to 30 Vdc (reverse polarity protected), max 5A External Rechargeable Batteries: 12 Vdc nominal Typical Current Drain (@12 Vdc)
Sleep Mode(MAX): 315 µA ON: 62 mA - ON with Ethernet connected: 87 mA ON with display: 115 mA ON with display and ethernet connected: 142 mA Analog Initialization: 115 mA Measurement: 123 mA (with 12 mA @ 24 V sensor) ENVIRONMENTAL CONDITIONS Operating Temperature: -30 to 60°C (display -20 to 60°C) Storage Temperature: -40 to 85°C (display -30 to 80°C) Relative Humidity: 80 %RH Overvoltage Category: II Pollution Degree: 2 Sound Levels: < 74 dBA Maximum Height of Use: 3000 m (9800 ft)
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† All dollar amounts on this site are shown in US currency.
Note: Comes with Ethernet cable, USB thumb drive. Ordering Example: (1) OM-240 24-channel Ethernet data logger with embedded web server, USD$106,960.00, plus (1) OM-240-MUX additional 24 channel inputs module to make the system to have 47 inputs channels (one is used by the MUX), USD$33,265.00, USD$106,960.00 + 33,265.00 = USD$140,225.00
