Ø Embedded cellular modem

Ø Ultra low battery consumption design

Ø Support SDI-12 input

Ø Automatic transfer of data to FTP

Ø 6 analog channel inputs

Ø Modbus SCADA connection

Ø Can control 12V&5V power output

Ø The software is built-in and does not require installation, and can be used on computers with Windows, Mac, and Linux operating systems

Ø Setting up instruments through web pages

Ø Connect to the instrument via Ethernet cable, USB data cable

Ø Intuitive graphical interface

Ø Simple setup interface, convenient for users of all levels

Ø Can view real-time and historical data

application area

Display and buttons

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

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

Button: View display information and operation functions through 6 buttons;

Signal LED lights: 4 signal lights, indicating sampling, hard disk, alarm information, and power supply respectively;

Software version upgrade

Upgrade software through Ethernet 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;

Peak power: 12W;

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;

Size: 180 x 137 x 65mm;

Weight: 0.9kg;

Operating temperature: -30 ℃ to 70 ℃;

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℃.

built-inModem

Alarm: Sending emails or SMS messages;

Data: Send data to email or FTP server;

Remote access: connect to dEX or command interface;

SIM panel: SIM card interface (1.8V/3V);

Network: EDGE, GPRS, GSM, WCDMA, HSUPA, HSDPA

Frequency: EDGE/GPRS/GSM: 850/900/1800/1900 MHz； WCDMA/HSUPA/HSDPA: 850/1900/2100 MHz

The DT82EM has 2 analog channels, each of which 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: 6;

Two line differential channels: 4;

Three or four differential channels: 2;

Basic input range

The basic input voltage, current, resistance, and frequency range that DT82EM can measure are as follows:

Note: The data collector has an automatic range switching function, which can switch between three ranges.

The basic input voltage, current, resistance, and frequency accuracy that DT82E 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.

Analog sensor

Introduce several common sensors, but the sensors that DT82E can connect to 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 input/output

4 bidirectional channels

Input type: 4 logic levels (maximum 20/30V);

Output type: 3 field-effect transistors (maximum: 30V, 100mA), 1 logic output;

Relay

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

counting channel

Low speed counting

4-channel counter, shared with the 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 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

One SDI-12 channel shared with the digital channel, each SDI-12 channel can connect more than 10 SDI-12 sensors;

Calculation channel

call the police

Delay: optional alarm response time;

Data Collection List

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

USB 1.1, USB 2.0 and other USB flash devices.

Communication panel

Ethernet port

Panel: 10Mbps;

Network services（TCP/IP）

Using Ethernet ports or built-inModem.

Command panel: Enter the ASCII command panel of DT82E 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;

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

FTP client: automatic transfer of data to FTP server;

Email client: receives data and warning messages from the data collector;

DDNS client: Pain over dynamic DNS remote access data collector