Description The datalogger is a bespoke, site specific logger with various modules and communication options, combined with a power supply, contained within a steel or reinforced ABS enclosure.
Applications
The Dataloggers can monitor a wide variety of geotechnical datalogging applications. They are ideally suited for structural and geotechnical monitoring and are used extensively in harsh environments on projects around the world.
Typical applications include:◆ Tunnels
Description
The datalogger is a bespoke, site specific logger with various modules and communication options, combined with a power supply, contained within a steel or reinforced ABS enclosure.We configure all the datalogging equipment to suit your individual needs and our technical expertise ensures a tailored solution to read an extensive range of sensors, in a vast rangeof environments. The datalogging system mainly includes the dataTaker DT80G/D85G GeoLogger and CEM20 models. A wide variety of communication options are available for the datalogger, including:
◆ Direct link to PC or laptop
◆ Fibre optic link
◆ Extended RS485 link (up to 13Km)
◆ Satellite up link
◆ Cellular (GSM/GPRS) modem
◆ Telephone modem
◆ IP via GPRS modem, i.e. direct to internet
◆ Dedicated radio communication
Key Features
◆ Universal–compatible with majority of the commercially available sensors
◆ Programmable–customised software deployment for changing and challenging requirements
◆ High input Impedance–ensure accurate sensor readings
◆ Expandable–expandable to 300(DT80G)/960(DT85G) analogue inputs with expansion module
◆ Programmable analogue output – for connection to SCADA or control application
◆ Additional support for vibrating-wires
◆ Carlson, electro level & LVDT support
◆ Capable to test sensor integrity through audible frequency
Main Specifications
Model
DT85G
DT80G
Max
Sampling rate (Hz)
40
40
Analog
Inputs
48
(2-wire common reference)
15
(2-wire common reference)
32
(2-wire isolated)
10
(2-wire isolated)
16 (3
and 4-wire isolated)
5 (3
and 4 wire isolated)
Analog
Input Range
Voltage:
±30m,300m,3000m,50000mVDC
Voltage:
±30m,300m,3000m,50000mVDC
Current:
±30mA
Current:
±30mA
Resistance:
1MΩ
Resistance:
1MΩ
Frequency:
450kHz
Frequency:
450kHz
Analog
Voltage Accuracy:
±0.15
of Reading + (Full Scale Reading * 0.01%)
±0.15
of Reading + (Full Scale Reading * 0.01%)
Effective
Resolution:
18
bits
18
bits
Analog
Outputs
1
1
Analog
Out Range
Voltage:
10m-10000mVDC
Voltage:
10m-10000mVDC
Current:
0-24mA
Current:
0-24mA
Excitation
Analog
Channel: selectable 2µA, 250µA or 2.5mA precision current source, 4.5V
voltage source or switched external supply
Analog
Channel: selectable 2µA, 250µA or 2.5mA precision current source, 4.5V
voltage source or switched external supply
Switchable
12V/5 regulated power output (max 300mA)
Switchable
12V/5 regulated power output (max 300mA)
Digital
IO
8
bi-directional channels
8
bi-directional channels
Counter
Low
speed counters: 8 counters shared with digital inputs
Low
speed counters: 8 counters shared with digital inputs
Dedicated
counters: 4 high speed or 2 phase encoder
Dedicated
counters: 4 high speed or 2 phase encoder
RS232/RS422/RS485 serial sensor port
1
1
RS232
host port
1
1
USB Port
1
1
Ethernet Port
1
1
Data
Storage
128MB
(upgradeable to 2GB)
128MB
(upgradeable to 2GB)
Vibrating
Wire supported
Yes
Yes
Protocols
Supported
Modbus,
FTP, HTTP, XML, SMTP, NTP and SDI-12
Modbus,
FTP, HTTP, XML, SMTP, NTP and SDI-12
CEM20
Expansion Module supported
Yes
Yes
Power Requirements
10-30
VDC
10-30
VDC
Internal
Battery
6Vdc
1.2Ah Lead Acid
None
Real
Time Clock Accuracy
± 1
min/year (0°C to 40°C)
± 1
min/year (0°C to 40°C)
± 4
min/year (–40°C to 70°C)
± 4
min/year (–40°C to 70°C)
Dimensions(mm)
300x137x65
180x137x65
Weight
2.5kg
1.5kg
Temperature
Range
–45°C
to 70°C
–45°C
to 70°C
Operation
The system can be setup to generate alarms remotely, via email or SMS, or locally using a siren and/or beacon if user defined parameters are exceeded.The datalogger consumes minimal power from either a 12 VDC or mains power source. Power supply options are flexible depending on the site and can include mains, solar cell, and wind generation.Increasing the channel capacity of the dataTaker DT80 range is made very easy by adding dataTaker Channel Expansion Modules (CEM20). Each CEM20 connects 20 universal data logging channels to the dataTaker data logger. A dataTaker CEM20 connects to one analogue channel of the dataTaker data logger. This effectively expands the total channel capacity of the DT80 to up to 100 sensors (with temperature compensation) or 300 analog inputsor and the DT85 to an incredible up to 320 sensors (with temperature compensation) or 960 inputs.