Ø Ultra low power design

Ø Embedded cellular modem

Ø Automatically transfer data to email or FTP

Ø Support vibrating string sensors

Ø Support Carlson, photoelectric liquid level, and LVDT displacement sensors

Ø Up to 960 simulation channels can be expanded

Software Features

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, or wireless connection

Ø Intuitive graphical interface

Ø Simple setup interface, convenient for users of all levels

Ø Can view real-time and historical data

Ø Data can be displayed in icons, bar charts, dials, and waveform charts

application area

Landslide control, dam wall monitoring, underground continuous wall monitoring, mining exploration, tunnel excavation, pile monitoring, etc

System Introduction

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, USB 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 (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:

built-in modem

characteristic

Alarm: sending emails or short messages;

Data: Send data to a designated email or FTP server;

Remote access: Connect to dEX software or command panel;

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

Network and frequency

In the United States region: EDGE，GPRS，GSM，CSD;

Other regions around the world: EDGE，GPRS，GSM，WCDMA，HSUPA，HSDPA；

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

basic feature

Numerical shell: Zinc aluminum alloy;

Size: 300 x 137 x 65mm;

Weight: 2.5kg;

Operating temperature: -30 ℃ to 70 ℃;

Operating humidity: 85%, water vapor does not condense;

Note: Low and high temperature environments can reduce battery life, and the operating temperature of LCD displays is -15 ℃ to 50 ℃.

analog channel

The DT85GM has 16 analog channels and can be expanded to a maximum of 320 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: 48 (up to 960 expandable);

Two line differential channels: 32 (up to 640 expandable);

Three wire or four wire differential channels: 16 (up to 320 extensions);

Note: Expansion requires configuring the CEM20 module, which contains 20 analog channels per module.

Basic input range

The basic input voltage, current, resistance, and frequency range that DT85GM 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 DT85GM 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 ± 30V within 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 DT85GM 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;

vibrational line

Frequency range: 500 to 5KHz;

Coil resistance: 50 to 200 Ω;

Simulation method: single pulse pluck；

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

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

7 high-speed or 3 phase encoder inputs

Model: 32-bit;

Maximum counting rate: 100kHz;

Serial channel

SDI-12

Four SDI-12 channels shared with the digital channel, each SDI-12 channel can connect 10 SDI-12 sensors;

Calculation channel

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 of the schedule: 10ms to days, each schedule has a separate sampling interval, and 10ms to days are optional.

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;

agreement: TCP/IP；

USBport

Panel: USB1.1；

Protocol: ASCII commands or TCP/IP;

Serial sensor port

Panel: RS232，RS422m，RS485；

Speed: 300 to 115200 baud rate;

Flow control: hardware (RTS/CTS);

Software (XON/XOFF): None

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

Network Services (TCP/IP)

Use Ethernet ports or built-in modem modules

Command panel: Enter the ASCII command panel of DT85GM 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;

Modbus client (master): reads data from Modbus devices or writes data to Modbus devices;

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

FTP client: Automatically downloads data to the FTP server.

Email client: Send data and warning messages from the data collector via email;

DDNS client: Accessing data collectors using Dynamic DNS