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- 1-3 universal inputs
- 18 bit resolution
- USB memory for easy data and program transfer
- Flexible communications (USB, Ethernet and RS232)
- Various remote connection options eg. dial up modem
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- USB memory for easy data & program transfer
- Dual Channel Isolation Technology
- Serial ‘Smart Sensor’ port
- User Definable allocation of memory size & mode
- Web server for improved browser access
- FTP for automatic data transfer
- Modbus for SCADA connection
- SDI-12 (multiple networks)
- Up to 3 Analog (± 30V) sensor inputs
- 8 Flexible Digital channels
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- Research & Development
- Agricultural Research
- Weather Stations
- Total Energy Monitoring
- Environmental Monitoring
- Temperature Profiling
- Aquaculture
- Structural Monitoring
- Strain Gauges
- Process Monitoring
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- Fault Identification
- Machine Down Time
- Pressure
- Load Cells
- Flow
- Vehicle Testing
- GPS
- CANgate (optional)
- CAN bus
- J1939
- OBDII
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The dataTaker DT81 is an ideal unit for end users or the OEM market requiring fewer channels and
demanding powerful features and flexibility of the DT80.
With support for SDI-12 sensors, Modbus for SCADA systems and Web enabled features, the
DT81 is the answer for any environmental or industrial monitoring project.
The DT81 is a robust, stand alone, low power and economical data logger. It’s USB memory stick
support, 18 bit resolution and extensive communications capabilities make it a powerful partner. |
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Versatile Measurement:
Analog and digital channels, high-speed counter inputs, phase encoder input and programmable
serial sensor channel allow the DT81 to easily connect to most sensors and data measurement
sources. Temperature, voltage, current, 4-20mA loops, resistance, bridges, strain gauges,
frequency, digital, serial and calculated measurements can all be scaled, logged and returned
in engineering units or within statistical reporting. Group sampling, logging, alarm and control
tasks within schedules to suit your requirements. Smart sensors, GPS, PLCs and other intelligent
devices are supported via a serial sensor port (RS232), with our optional CANgate interface
available for CAN bus applications..
Data Storage and Communications:
Store up to 10 million data points in user defined memory, log as much or as little as you
need with independent control of schedule size and mode. Overwrite or stop logging once
allocated memory is full. Archive data on alarm event, copy to USB memory or transfer via FTP,
the choice is yours.
Communications features include RS232 with modem support, USB, Ethernet and USB memory
stick ports. Connect to the DT81 locally, remotely or over the Internet. The web server allows
browser access to data and files, FTP provides data to your office over the internet or mobile
phone network, without the need for polling or specific host software. |
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|||||||| Click here for General Specifications
| DT81 Handheld Data Logger |
| Digital Channels |
| No. of Channels: |
4 bi-directional channels |
| Input Type |
4 logic level (max 20/30V) |
| Output Type: |
3 with open drain FET
(max: 30V, 100mA), 1 with logic output. |
| Input Ranges |
| Fundamental Input Ranges |
The fundamental inputs that the DT81 can measure
are voltage, current, resistance and frequency.
All other measurements are derived from these.
Auto-ranging is supported over 3 ranges. |
| Voltage & Current |
Full Scale |
Resolution |
| Input Ranges |
±30 mVdc
±300 mVdc
±3 Vdc
±30 Vdc
±0.3 mA
±3 mA
±30 mA |
0.25 μV
2.5 μV
25 μV
250 μV
2.5 nA
25 nA
250 nA |
| Resistance |
Full Scale |
Resolution |
| Input Ranges |
100 Ω
1000 Ω
10,000 Ω
100 Hz
10 kHz |
1.5 mΩ
15 mΩ
150.00 mΩ
0.0002 %
0.0002 % |
| Accuracy |
| Resistance |
5°C to 40°C |
– 45°C to 70°C |
DC Voltage
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0.1% |
0.35% |
DC Current
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0.15% |
0.45% |
DC Resistance
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0.1% |
0.35% |
| Frequency |
0.1% |
0.25% |
| Channels | Sampling Rate |
| channels |
1 analog input channel
The channel supports: one isolated 3-wire or 4-wire
input, or two isolated 2-wire inputs,
or three common referenced 2-wire inputs. |
| Resolution |
18 bits |
| Fastest |
25Hz |
| Linearity |
0.01% |
| Common mode rejection: |
>90dB |
| Line series mode rejection: |
>35dB |
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| Inputs |
| Inter-Channel Isolation: |
100V (relay switching) |
| Resolution |
100V (opto-isolated) |
| Input impedance: |
100KΩ, >100MΩ |
| Common mode range: |
±3.5V or ±35V on 30V range |
| Sensor Excitation (Supply) |
| Analog channel: |
Selectable 250μA or 2.5mA precision
current source, 4.5V voltage source, or switched external
supply. |
| General Purpose: |
Switchable 12V regulated supply for powering sensors & accessories. (max 150mA) |
| Analog Sensors |
Supports a wide range of sensors including, but not
limited to, those listed below. A wide range of sensor
scaling and linearizing facilities including polynomials,
expressions and functions. |
| Thermocouples |
| input: |
B, C, D, E, G, J, K, N, R, S, T |
| Calibration standard: |
ITS-90 |
| RTDs |
| input: |
Pt, Ni, Cu |
| Resistance range: |
10Ω to 10KΩ |
| Thermistors |
| input: |
YSI 400xx Series, other types* |
| Resistance range: |
<10kΩ** |
* Other thermistor types are supported by scaling and calculated channels.
**Resistance range can be increased with the use of a parallel resistor. |
| Monolithic Temperature Sensors |
| Types supported: |
LM34 - 60, AD590, 592, TMPxx, LM135, 235, 335 |
| Strain Gauge and Bridge Sensors |
| Configurations: |
¼ , ½ & full bridge |
| Excitation: |
voltage or current |
| 4-20mA Current Loop |
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Internal 100R shunt or external shunt resistor |
| Relay Outputs |
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1 latching relay, contacts (max: 30Vdc, 1A) |
| Counter Channels |
| Low Speed Counters |
4 counters shared with digital inputs.
Low speed counters do not function in sleep mode |
| Size: |
32 bit |
| Max Count rate: |
10 Hz |
| Serial Channels |
| SDI-12 |
1 SDI-12 input, shared with digital channel.
The input can support multiple SDI-12 sensors |
| Generic Serial Sensor |
| Flexible options to allow data to be logged from a wide range of smart sensors and data streams. |
| Available ports: |
Host RS232 Port* |
| Baud rate: |
300 to 115200 |
| *If used as a Serial Sensor channel then the Host Port is not available for other communications |
| Calculated Channels |
| Combine values from analog, digital and serial sensors using expressions involving variables and functions. |
| Functions: |
An extensive range of Arithmetic, Trigonometric, Relational, Logical and Statistical functions are available. |
| Alarms |
| Condition: |
High, low, within range and outside range |
| Delay: |
Optional time period for alarm response |
| Actions: |
set digital outputs, transmit message, execute any dataTaker command |
| Scheduling of Data Acquisition |
| No. of schedules: |
11 |
| Schedule rates: |
10ms to days |
| Serial Channels |
| SDI-12 |
1 SDI-12 input, shared with digital channel.
The input can support multiple SDI-12 sensors |
| Data Storage |
| Internal Storage |
| Capacity: |
128MB = approx 10,000,000 data points |
| USB Storage |
| Types: |
Compatible with USB 1.1 or USB 2.0 drives, e.g. Flash drive |
| Capacity: |
Approx. 90,000 data points per megabyte |
| Communication Interfaces |
| Ethernet Port |
| Interface: |
10BaseT (10Mbps) |
| Protocol: |
TCP/IP |
| USB Port |
| Interface: |
USB 1.1 (virtual COM port) |
| Protocol: |
ASCII command |
| Host RS232 Port |
| Speed: |
300 to 115200 baud (57,600 default) |
| Flow Control: |
Hardware (RTS/CTS), Software (XON/XOFF), None |
| Modem support: |
auto-answer and dial out |
| Protocols: |
ASCII Command, TCP/IP (PPP), Modbus, Serial Sensor |
| Network (TCP/IP) Services |
| Command Interface |
Access the ASCII command interface of the DT80 via
TCP/IP |
| Web Server |
Access current data and status from any web browser. Custom pages can be defined. Download data in CSV format. Command interface window. Define mimic displays. |
| Modbus Server (slave) |
Access current data and status from any Modbus client (e.g. SCADA system) |
| FTP Server |
Access logged data from any FTP client or web browser |
| FTP Client |
Automatically upload logged data direct to an FTP server |
| Real Time Clock |
| Normal resolution: |
200μs |
| Accuracy: |
±1 min/year (0°C to 40°C), ±4 min/year (-40°C to 70°C) |
| Typical Operating Time |
| Real Time Using 12Vdc external power source |
| 1 second |
6.5 hours |
| 5 second |
1 day |
| 1 minute |
10 Days |
| 1 hour |
3.5 months |
| Power Supply |
| External voltage : |
10 to 30Vdc |
| Internal battery: |
6Vdc 1.2Ahr lead acid |
| Peak Power: |
12W (12Vdc 1A |
| Physical and Environment |
| Construction: |
Powder coated zinc and anodized aluminum |
| Dimensions: |
180 x 137 x 65mm |
| Weight: |
1.5kg (4kg shipping) |
| Temperature range: |
–45°C to 70°C * |
| Humidity: |
85% RH, non-condensing |
| *reduced battery life and LCD operation outside range –15°C to 50°C |
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|||||||| Click here for Navigation
| Connectivity | Navigation |
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General Overview
- USB, Ethernet and RS232 connectivity for quick and easy PC and remote communication and networking.
- Power supply – external DC power supply with internal rechargeable lead acid battery.
- 4 digital input/output or low speed counter channels
- 4 high speed counters or 2 phase encoders
- 5 to 15 universal analog inputs for recording temperature, current, voltage and resistance
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|||||||| Click here for Models
| DT81 |
| Standard Model |
dataTaker DT81 Maximum Analog Input Capacity
Includes the following;
- 1 Four wire Isolated/2 Two wire Isolated/3 Two wire common reference
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| DT80/DT80G |
| high input model |
dataTaker DT80 Maximum Analog Input Capacity
Includes the following;
- 5 Four wire Isolated/10 Two wire Isolated/15 Two wire common reference
- With 5 x CEM20's connected 100 Four wire Isolated/200 Two wire Isolated/300 Two wire common reference
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| DT85/DT85G |
| high input model |
dataTaker DT85 Maximum Analog Input Capacity
Includes the following;
- 16 Four wire Isolated/32 Two wire Isolated/48 Two wire common reference
- With 15 x CEM20's connected 300 Four wire Isolated/600 Two wire Isolated/800 Two wire common reference
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- Related Products
- Complementary Products
Yokogawa Data Acquisition Units
Grant Portable Data Loggers
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Specifications
Manual |
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