产品名称：GTD-3000Ex气体检测仪
上图：标准型GTD-3000Ex
上图：插入型GTD-3000Ex
上图：远程型GTD-3000Ex
GTD-3000Ex概述
◤ 采用阻燃结构，持续对爆炸危险区内的可燃气体进行检测
◤ 采用内置微处理器实现自诊断功能
◤ 根据多种检测原理，对从低到高浓度可燃气体进行检测
◤ 长期稳定的品质与久经验证的检测原理
◤ 内置背光LCD或OLED显示屏
◤ 采用磁棒实施自动校准和程序设置
◤ 2级警报、单故障显示与继电器触点输出
◤ 4-20mA 直流输出信号
◤ RS-485 Modbus 串行通信，易于构建监测系统（可选）
◤ 配有警报装置
- 正常：绿色LED
- 警报：红色LED、蜂鸣音（95 dB）
- 故障：黄色LED
◤ 单人校准与维护
GTD-3000Ex技术参数
| 型号 | GTD-3000Ex |
| 测量气体 | 易燃气体（液化天然气、液化石油气、氢气、甲烷、丁烷等） |
| 测量方式 | 扩散型 |
| 测量方法 | 催化元件 半导体元件 热导元件 |
| 响应时间 | T90 < 15秒 |
| 精度 | ±3% / 满量程 |
| 操作方式 | 磁棒操作 |
| 工作模式显示 | 4-LED（电源、2级警报、单故障） |
| 示值显示 | LCD显示（内置背光双线、16字符）/OLED型（可选） |
| 警报信号输出 | 250V 1A / 3-单刀单掷开关（SPST）继电器触点（2-级警报、1-故障） |
| 输出信号 |
模拟：测量信号：4-20mA 直流 维护信号：3mA 直流 校准信号：3mA 直流 故障信号：0mA 直流 数字：RS-485 Modbus（选配） |
| 电缆/距离 |
电力电缆 + 信号电缆：3-线 > 1.5平方（AWG16）/最大：2500m RS-485 数据通信电缆：1对（UL2919 RS-485）/最大：1000m |
| 导管连接 | M20 x 1.5P、M25x1.5P、NPT ½英寸、NPT ¾英寸 |
| 安装类型 | 2英寸杆式安装、壁挂式安装、管式安装 |
| 工作温度 | -20℃ ~ +60℃ |
| 运行湿度 | 5 ~ 99%.RH（非冷凝） |
| 运行功率 | 18 ~ 31V 直流（常规：24V 直流）/ 200mA |
| 尺寸 | 156 x 186 x 110（宽x高x深）mm |
| 重量 | 1.8kg |
| 认证 |
防爆型（Ex d IIC T6、IP65）KCs 防爆型（Ex d IIC T5 Gb）NEPSI CE （EN 50270：2006） |
▷ Continuous detection of flammable gases in explosion hazardous area with flame proof structure
▷ Self diagnosis function with built-in Microprocessor
▷ Detection gas from low to high concentration owing to various detection principle
▷ Stable quality and proved detection principle for service life
▷ Built-in back light LCD or OLED display
▷ Auto calibration and program setting with a magnet bar
▷ 2-stage alarm, 1-trouble display and relay contact output
▷ 4-20mA DC output signal
▷ Easy configuration of monitoring by RS-485 Modbus isolated serial data communication(Option)
▷ With the alarm unit
- Normal : Green LED
- Alarm : Red LED, Buzzer(95 dB)
-T rouble : Yellow LED
▷ Calibration and maintenance by one-man
| INTELLIGENT & LOCAL DISPLAY TYPE GAS DETECTOR GTD-3000Ex | |
| Model | GTD-3000Ex |
| Measuring gas | Flammable gases (LNG, LPG, H2, Methane, Butane & etc) |
| Measuring type | Diffusion type |
| Measuring method | Catalytic cell / Hot wire semiconductor cell / Thermal conductivity cell |
| Measuring range | 0~100% LEL / 0~2,000ppm / 0~100% Vol |
| Response time | 〈10 sec |
| Accuracy | ±1.5% / Full scale |
| Parameter control | Non intrusive control with a Magnet (calibration, maintenance, alarm setting) |
| Operation mode display | 4-LED (Power, 2-stage alarm, 1-trouble) |
| Measuring value display | LCD display (Built in back light 2-Line, 16 characters) / OLED Tpye (Option) |
| Alarm signal output | 250V 1A / 3-SPST relay contact (2-stage alarm, 1-trouble) |
| Output signal | Analog : Measuring signal : 4-20mA DC |
| Maintenance signal : 3mA DC | |
| Calibration signal : 3mA DC | |
| Fault signal : 0mA DC | |
| Digital : RS-485 Modbus(Option) | |
| Cable | Power + Signal cable : 3-wire 〉1.5sq (AWG16) |
| RS-485 data communication cable : 1 pair (UL2919 RS-485) | |
| Conduit connection | G. Rc. NPT 1/2" & 3/4" (G 3/4" : standard) |
| Mounting type | 2" Pole mount, Wall mount, Duct mount |
| Operating temperature | -20℃ ~ +60℃ |
| Operating humidity | 5 ~ 99%.RH (non-condensing) |
| Operating power | 18 ~ 31V DC (24V DC normal) / 250mA |
| Dimensions | 156 x 186 x 110 (W x H x D)mm |
| Weight | 1.8kg |
| Approval | Explosion proof type (Ex d IIC T6, IP65) KCs |
| Explosion proof type (Ex d IIC T5 Gb) NEPSI | |
| CE (EN 50270:2006) |
