1. Overview

HG39－DH01T型HART协议智能温度变送器是一款高精度、高稳定性、多参数、4位半 LCD 显示的智能温度测量产品，符合 HART协议。用户能够利用 HART通讯器对过程中运行的 HART 仪表进行管理、调整或者监测过程变量，亦可使用按键进行现场组态，操作方便。精密数字化非线性修正技术，安全可靠的防爆结构设计和标准化的信号输出，精度高，量程覆盖范围宽，适用于需要进行精密测量的场所。该产品为两线制方式工作，可直接替代模拟两线制 4～20mADC 输出变送器。可广泛应用于石油、化工、钢铁、电力、建材、纺织、制药、食品、气体、科学实验和军工等各个领域，已在大庆、华北、新疆等各油田推广应用，以其精度高、可靠性高、安装简单、维护方便、环保耐用等特点赢得用户认可。

2. Features

4~20mA current output superimposed with HART protocol digital communication (two-wire system);

·Adopt digital nonlinear correction technology;

On-site key operation is available for easy configuration;

·Protection grade IP67.

3. Performance indicators

Measuring range: -200～650℃ (customizable);

Accuracy: ±0.5 %FS (customizable)

Working temperature: -20℃～80℃

Storage temperature: -40℃～85℃

Power supply: (15～30) VDC (24VDC recommended)

Digital output: (4~20)mADC output superimposed with HART protocol digital communication

Display: LCD display, two/three-button control

Damping: (0～32)s

Insulation: 100MΩ/50V

O-ring: Fluororubber

Weight: Approx. 1.7kg

Protection grade: IP67;

Explosion-proof certificate number: CE18.1518 Explosion-proof mark: Exd IIc T4 Gb.

4. Appearance and structure (unit: mm)

The appearance structure is shown in Figure 1.

5. Installation

The general installation method is: the sensor probe sleeve is welded on the pipeline (or the device to be measured), and the sensor is screwed on the probe sleeve. The following is the installation instructions for the oil pipe of the pumping unit, and other applications are similar.

The operation process is (as shown in Figure 2):

(1) Close the valve of the oil pipeline and release the pressure. Open a hole in the oil pipeline that is slightly larger than the outer diameter of the sensor probe base;

(2) Insert the base from the opening to the maximum depth, adjust the base to form a 45° inclination with the oil flow, and then seal and weld it to the oil pipe along the hole;

(3) Inject heat transfer oil into the base, about 2/5 of the volume of the tube;

(4) Insert the temperature sensor probe into the base, tighten the sensor with a wrench stuck in the hexagonal prism, and open the pipeline valve to restore.

6. Electrical connection

打开仪表后盖（接线端子面），见接线端子，电源连接见图4：其中左端 1（红）、2（黑）为传感器供电、信号接线，不分正负极，上端的4脚为接地线屏蔽线固定端。

7. Notes

7.1. All sensors are digitally calibrated, and different sensors are completely consistent and interchangeable.

7.2. Connect the sensor power supply and signal wiring to the left end of the three-core terminal POWER1+ (red) and POWER 2- (black), install and tighten the back cover. Pay attention to tighten the sheath to prevent water leakage.