Nomad 2 data logger

Nomad 2 Data Logger
Nexgen is Europe’s leading provider of high
quality monitoring equipment.
The Nomad 2 data logger can performs accurate measurements of wind speed and
direction, air temperature and pressure, and has proven reliability in the most
extreme of conditions.
The logger stores data on a Windows compatible CF card that can then be read by
any computer running Windows. For lengthy measurement campaigns, a large
capacity 12V battery and solar panel can be supplied permitting continuous remote
operation of the logger and connected sensors.
Remote Access
The Nomad 2 can deliver the latest 24 hours of recorded data direct to your inbox
at a set time every day via the GSM network, using an optional quad-band modem.
This facility also allows communication with the data logger from the office,
enabling uploading of new configurations, viewing of real time data, downloading
of mislaid data etc.
Numerous and Flexible Sensor Connections
Straight from the box, this logger has 12 pulsing/switching channels, for sensors
such as anemometers, rain gauges, energy meters and relays. In addition to these,
it has 8 analogue voltage channels suitable for wind vanes, thermistors and
transducers to measure air pressure, solar radiation, or humidity.
Robust Enclosure
The Nomad 2's electronics are contained within an upper compartment rated to
IP66, to protect them from the elements. A lower compartment contains screw
terminals for sensor connections (power supply plus transient protected signals)
and 12V battery plus charge regulator. The enclosure is manufactured from a
rugged powder-coated steel enclosure.
Power Supply
The Nomad 2 can operate using just two 9V (PP3) batteries for an extended period
of time or can be fitted with a recharge pack for a more durable solution. The
recharge pack includes a rechargeable 12V battery and a 10W solar panel to
provide long term continuous power to the logger, sensors and any remote
communications packages.
User-friendly Desktop Software
Configuration of both the data logging and communications is done using
dedicated software called Nomad Desktop. A large array of popular sensors are
present and configured in the software’s database, the user simply selects the
appropriate instruments from drop down menus. Specific calibration factors (slope
and offset) can be used in place of default values. Desktop also allows remote
access to the data logger, to view live data from your sensors, to download specific
data files and alter settings. The recorded data can then be displayed as a time
series, wind rose, diurnal or distribution graph. Data can also be exported in CSV
format for further processing by specialist software.
Tel: +44 (0) 1453 759 408 Fax: +44 (0) 1453 759 416 E-mail: info@nexgenwind.com Website: www.nexgenwind.com
Axiom House, Station Road, Stroud, Gloucestershire GL5 3AP United Kingdom
Nomad 2 Data Logger
Design Specification
SENSOR INPUTS
USER INTERFACE
12 Counter Inputs:
Local Display
• Configurable for AC & pulse anemometers, other frequency output devices, and high/low digital or
relay state signaling
• Frequency range DC to 2 kHz
• High display resolution with low frequency anemometers
• Input high/low threshold configurable for 0V or 3V
• Configurable filtering for low frequency devices
• 1 second count integration, ±0.02% accuracy
• 4 x 20 alphanumeric character display, LCD or VFD
• Configurable smart switched power
• Automatic temperature compensating LCD contrast
8 Analog Inputs:
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Configurable range of 0 to 2.5V or 5V
12 bit analog to digital conversion
1 second sampling, ±0.2% accuracy
Direct interface to potentiometer wind vanes, 10k thermistors, and analog output transducers
Fault Detection:
• Feedback input from 2.5V+ excitation output for wiring and device fault detection
Internal Temperature:
• 1 second sampling, ±2°C accuracy
Power Supplies:
• Measurement of two 9V batteries and 12V power
• 1 second sampling, ±0.1V accuracy
OUTPUTS
Keypad:
• 7 key sealed membrane keypad
Remote Interface:
• Full display, configuration, data transfer, & firmware upgradable by local port or modem connection to
any PC via NOMAD Desktop™
Status Light:
• Heartbeat LED indicates operational status independent of display
I N P U T A N D D ATA P R O C E S S I N G
Wind Speed:
• Slope & offset scaling, auto-zero for counter inputs
Wind Direction:
• Modulo 360° and true vector processing
• Deadband orientation correction
Temperature:
• Thermistor linearization to device accuracy (±0.1°C)
Maths Functions:
2.5V+ Excitation:
• 2.5V+ smart switched excitation distributed to all input terminal blocks for energy conserving
measurement of potentiometers and thermistors
• Calibrated to ±5mV, 25 ppm/°C, 250 mA max
• Average, standard deviation, 3 second gust maximum, time of maximum, minimum, time of minimum,
total, sample value
Recording Intervals:
• 1 minute, 10 minutes, hourly, or daily in any combination for all inputs and math functions
D ATA S T O R A G E
12V Transducer Power:
• 12V+ smart switched transducer power output distributed to all input terminal blocks for energy
conserving operation of electronic transducers
• 1 Amp maximum
12V Modem Power:
• 12V+ configurable switched modem power output for energy conserving operation of cellular & other
modems
• 1 Amp maximum
Modbus Protocol
• Optional extra for SCADA applications in wind farms
P O W E R S U P P LY
9 Volt Batteries:
• 2 parallel standard 9V batteries in sliding receptacles
• Up to 6 months operation with alkaline, up to 1 year with lithium (-40°C) batteries that have no
shipping restrictions
Media:
• Industry/consumer standard Compact Flash
• Read/write-able by any notebook or desktop PC via an internal, USB type or PCMCIA Compact Flash adapter
• Full -40° to 85°C operation rated devices available
Formats:
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Card directory & file formats are fully Windows™ compatible
Any FAT (PC) formatted Industrial Grade Compact Flash Card
Data written to daily files in monthly subdirectories
Each datum in standard IEEE floating point format, indexed for positive database ID independent of file
name/location
• Each datum time stamped in Universal Time (UT/GMT), configurable for time zone & daylight saving offsets
Transfer:
• Files transferable by card removal, local serial connection, remote dial-up connection, or via email
attachments
PHYSICAL
12 Volt Power:
• 12V (10-18V DC) input for internal primary or rechargeable batteries, external DC power supply, or
regulated solar panel
• Removable internal mounting for lead-acid batteries for higher power transducer, controls, and
communication gear, standard sizes up to 7 AH, extreme environment sizes up to 17 AH
Solar:
• On-board solar charging regulator/controller capable of handling up to 10W
SERIAL PORTS
• 3 independent RS232C serial ports, up to 115 kBaud
Local Port:
• Direct straight cable connection to laptop or PC
• Standard pinout DB9, DCE
Remote Port:
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Connects to modem, radio, or asynch network adapter
Auto-wakeup Rx input
Internally connected for SWI supplied modem options
Field-wireable terminals for customer installed devices
Device Port:
• Connects to and logs from communicating transducers including multifunction Phaser®
power transducers & ultrasonic anemometers
ESD PROTECTION
• All inputs, outputs, and serial port signalling transient and fault protected
• No additional lightning protection needed
Display:
• LCD operates from -20° to 70°C, storage -30° to 80°C
Internal RT Clock:
• ±1 minute/month accuracy, internet time-server adjustable
• Backed up by socketed 2032 Lithium coin cell (10 year life)
Wire & Cabling:
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12 six-screw, 0.2" (5mm) cage clamp style terminal blocks
Signal, ground, excitation, switched & unswitched 12V power distributed to each of 8 terminal blocks
Standard SMA-F bulkhead connector for external antennas
Four 3/4" npt/pg21 knockouts for cable & conduit installation
Enclosure:
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Integrated waterproof instrument enclosure, wire and cable junction box, and lockable rain shed
Upper section NEMA4/IP66 (water tight), lower section NEMA3R (rain tight) or NEMA4 with cable glands
16 ga. steel, 14 ga. mounting flanges, TGIC powdercoated
14 x 12 x 5.5 inches (350 x 300 x 140mm), 20 lbs. (9 kg)
Mini-rack mounting for internal modem options
Swing-out panels for modem and 12V battery access
Surface, truss tower, or tube tower mounting
Single no-tools lockable hasp closure
AVAILABLE OPTIONS
• GSM and satellite modems
• Integrated solar charging systems, including 7AH lead acid battery, mounting brackets and 10W solar panel.
As part of our policy of continuous improvement we reserve the right to change this specification at any time.
Tel: +44 (0) 1453 759 408 Fax: +44 (0) 1453 759 416 E-mail: info@nexgenwind.com Website: www.nexgenwind.com
Axiom House, Station Road, Stroud, Gloucestershire GL5 3AP United Kingdom
Printed using Ecotricity on recycled chlorine-free paper and using vegetable-based inks. Version 3.08