Ø Adopting dual channel separation technology

Ø Up to 15 analog (± 50V) sensor channels

Ø Can be expanded to up to 300 analog channels

Ø Support SDI-12 channel (expandable to multiple sensor networks)

Ø2 intelligent serial port channels

Ø Can use Modbus protocol for SCADA connection

ØWeb and FTP client/server browsing

ØCan use USB flash drive for data collection and program transfer

application area

Research and teaching, agricultural research and application, meteorological stations, energy consumption monitoring, environmental monitoring, temperature monitoring, thermistors, aquaculture, building structure monitoring, strain monitoring and recording, production process monitoring, fault diagnosis, mechanical work efficiency testing and monitoring, pressure, force sensors, flow, vehicle monitoringGPS、CANgate (Optional)CANBusJ1939、0BDII

Application examples

Agricultural Internet of Things (Greenhouse and Multi Environmental Factor Monitoring)

Water and fertilizer irrigation (water-saving and multi parameter monitoring of soil)

Marine Ranch (Water Quality and Nutrients, Hydrological Monitoring and Algae, Aquaculture)

Long term monitoring of ecological environment and plant physiology (plant monitoring and growth modeling)

Civil engineering (displacement, pressure, inclination sensors)

Wastewater treatment plant waste liquid monitoring (pH, temperature, flow sensors)

Coal mine water quality monitoring (water quality, conductivity, turbidity, etc.)pH、 Water temperature and level sensors

High temperature testing of cars in the desert (thermocouples, radiation sensors)

Research on natural degradation of building materials (temperature, humidity, rainfall, wind speed and direction, total radiation, ultraviolet radiation, thermocouple sensors)

System Introduction

Display and buttons

Type: LCD display, 2 lines of 16 characters, backlight;

Display function: channel data, alarm information, system status;

Button: Through6Press a button to view display information and operation functions;

signalLEDLamp:4A signal light indicating sampling, hard disk, alarm information, and power supply respectively;

Software version upgrade

Upgrade software through RS232, Ethernet cable, USB data cable or USB flash drive;

clock

Basic resolution: 200 µ s;

Accuracy: ± 1 minute per year (in an environment with a 0 ℃ value of 40 ℃), ± 4 minutes per year (in environments with -40 ℃ to 0 ℃ and 40 ℃ to 70 ℃);

power supply

External power supply range: 10 to 30Vdc;

Built in power supply: 6Vdc, 1.2Ahr lead-acid battery;

Peak power: 12W (12Vdc 1A);

Average electrical loss

The relationship between sampling frequency and power consumption when using a 12Vdc external power supply is shown in the following table:

basic feature

Numerical shell: Zinc aluminum alloy;

chi Inch:180 x 137 x 65mm；

weight Quantity:1.5kg；

Operating temperature:-40℃ to70℃；

Operating humidity:85%Water vapor does not condense;

Note: Low and high temperature environments can reduce battery life,LCDThe working temperature of the display screen is-15℃ to50℃.

analog channel

The DT80 has 5 analog channels and can be expanded to up to 100 analog channels. Each analog channel can be connected to a three wire or four wire input, two independent two-wire inputs, or three single ended two-wire inputs.

The specific number of connections is as follows:

Two wire single ended channel: 15 (up to 300 expandable);

Two line differential channels: 10 (up to 200 expandable);

Three wire or four wire differential channels: 5 (up to 100 extensions);

Note: Expansion requires configurationCEM20Module, a module contains20A simulated channel.

Basic input range

The basic input voltage, current, resistance, and frequency range that DT80 can measure are as follows:

Note: The data collector has an automatic range setting function and can switch between three ranges.

The basic input voltage, current, resistance, and frequency accuracy that DT80G can measure are as follows:

Note: Accuracy relative to full scale.

Sampling information

In order to ensure measurement accuracy and suppress the influence of noise, a line frequency period greater than 50/60Hz is integrated.

Maximum sampling speed: 25Hz;

Effective resolution: 18 bits;

Linearity: 0.01%;

Common mode rejection: 90dB；

lineSexual stringing inhibition: 35dB.

input

Channel isolation: 100V (relay open state);

Analog component isolation: 100V (photoelectric isolation);

Input impedance: 100K Ω,> 100MΩ；

Common mode range: ± 3.5V, or ± 35V in the 30V range

Sensor excitation

Simulation channel excitation: optional 250 µ A or 2.5mA precision current source, 4.5V voltage, switchable external power supply;

Universal excitation: The 12V power supply (maximum 150mA) can be turned on and off to power sensors and accessories, and the 5V power supply (maximum 25mA) can be turned on and off to power analog channels.

Introduce several common sensors, but the sensors that can be connected to DT80 are not limited to the following types.

thermocouple

Thermocouple types: B, C, D, E, G, J, K, N, R, S, T type;

Thermocouple calibration: ITS-90；

RTDs

RTD material type: Pt，Ni，Cu；

Resistance range: 10 Ω to 10K Ω;

thermistor

Thermistor type: YSI400xx series;

Resistance range: ＜ 10kΩ

Note 1: Other types of thermistors are also supported.

Note 2: The measurement range can be expanded by parallel resistors.

Single chip temperature sensor

Support type: LM34-60，AD590/592，TMPxx，LM135/235/335；

Strain gauges and bridge sensors

Configuration: 1/4 bridge, 1/2 bridge, and full bridge;

Excitation: voltage or current;

4-20mACurrent loop

Internal 100 Ω or external shunt resistor.

DIGITAL CHANNEL

digital input/output

8 bidirectional channels

Input type: 8 logic levels (maximum 20/30V);

Output type: 4 field-effect transistors (maximum: 30V, 100mA), 4 logic outputs;

Relay

1 direct self-locking relay (maximum: 30Vdc, 1A).

counting channel

Low speed counting

8-channel counter, shared with digital channel; The low-speed counting function does not work in sleep mode.

Model: 32-bit;

Maximum counting rate: 10Hz;

Dedicated counting input

4 high-speed or 2 phase encoder inputs

Model: 32-bit;

Maximum counting rate: 100kHz;

Input type: 2 logic level inputs (maximum ± 30V). 2 magnetic induction (maximum ± 10V) sensitive inputs (10mV).

Serial channel

SDI-12

Four SDI-12 channels shared with the digital channel, each SDI-12 channel can connect multiple SDI-12 sensors;

Universal Serial Sensor

It is very convenient to record data from sensors and data streams.

Available ports: Serial sensor port (RS232, RS422, RS485) or host RS232 port;

Baud rate: 300 to 115200.

Note: When using a serial sensor channel, the host port cannot be used for communication.

The calculation channel can perform arithmetic, trigonometric, correlation, logical, and statistical analysis on the data collected by the data collector from analog, digital, or serial channels.

call the police

Condition: Below, above, within range, or outside range;

Delay: optional alarm response time;

Action: Digital output, transmitting information or executing any datataker command.

Data Collection List

Number of schedules: up to 11;

Sampling interval for schedule: Each schedule has a separate sampling time interval, ranging from 10ms to days.

Data Storage

Built-in storage

Storage space: 128MB, capable of storing approximately 10 million pieces of data (large memory space can be customized);

External storage device

Communication panel

Ethernet port

Panel: 10Mbps;

Protocol: TCP/IP, Modbus protocol;

USBport

Panel: USB1.1 (virtual communication interface);

Protocol: ASCII commands;

hostRS232port

Speed: 300 to 115200 baud rate (default 57600);

Flow control: hardware (RTS/CTS);

Software (XON/XOFF): None

Handshake protocol: DCD，DSR，DTR，RTS，CTS;

Modem support: automatic answering and dialing;

Protocol: ASCII command, TCP/IP (PPP), Modbus protocol, serial sensor;

Serial sensor port

Panel: RS232，RS422m，RS485；

Speed: 300 to 57600 baud rate;

Flow control: hardware (RTS/CTS);

Software (XON/XOFF): None

Protocol: Modbus protocol, serial sensor;

Use Ethernet port or host RS232 port

Command panel: Enter the ASCII command panel of DT80 through TCP/IP;

Network server: Accessing existing data and data collection status through web pages, setting up user specific display interfaces, and downloading CSV format data;

Modbus server (controlled end): obtains data and data acquisition status through Modbus client;

ModbusClient (main control end): frommodbusRead or write data from the devicemodbusIn the equipment;

FTP server: retrieves stored data through a browser or FTP client;