描述
一、产品定位与核心优势
1.品牌与产品线归属
YOKOGAWA（横河电机）：
全球领先的工业自动化与测试测量解决方案提供商，产品覆盖压力变送器、流量计、温度传感器、DCS系统等，以高精度、高可靠性著称。
CP34501属于EJA/EJX系列压力变送器，定位中高端工业市场，满足严苛工况下的长期稳定运行需求。
2.核心优势
高精度测量：
基本精度±0.04%（满量程），温度影响±0.015%/10℃，远优于普通压力变送器（±0.1%-0.5%），适用于精密过程控制。
多协议兼容性：
支持HART 7/BRAIN协议，可与PLC、DCS、SCADA系统无缝集成，实现远程监控、参数配置与故障诊断。
耐环境设计：
IP67防护等级（防尘防水），-40℃~+85℃工作温度范围，适应户外、高温/低温、潮湿等恶劣环境。
长寿命与低维护：
采用硅谐振传感器（EJA系列）或电容式传感器（EJX系列），无机械运动部件，寿命≥10年，减少停机维护成本。
安全认证：
通过ATEX、IECEx、FM、CSA等国际防爆认证，适用于易燃易爆场所（如油气田、化工厂）。
3.典型应用场景
石油与天然气：
井口压力监测、管道输送压力控制、分离器液位测量。
化工与制药：
反应釜压力调节、蒸馏塔压力平衡、无菌环境压力控制。
电力行业：
锅炉给水压力测量、汽轮机蒸汽压力监测、冷却水系统压力控制。
水处理与环保：
污水处理厂进水压力监测、反渗透膜压力控制、泵站压力调节。
食品与饮料：
CIP（就地清洗）系统压力监测、发酵罐压力控制、灌装机压力调节。
二、技术参数详解
1.基础规格
参数类别规格详情
型号YOKOGAWA CP34501（EJA/EJX系列变体）
测量类型表压（Gauge）、绝压（Absolute）、差压（Differential）（可选）
量程范围表压/绝压：0-0.1 kPa~100 MPa
差压：0-0.1 kPa~10 MPa（具体量程根据型号定制）
输出信号4-20mA DC（两线制）+HART 7/BRAIN数字信号
供电电压10.5-42V DC（标准）
防护等级IP67（符合IEC 60529）
防爆认证ATEX Ex ia IIC T6 Ga（本质安全型）
IECEx Ex ia IIC T6 Ga
FM/CSA Class I,Division 1,Group A-D
材质过程连接：316L不锈钢
传感器膜片：哈氏合金C-276/钽（耐腐蚀）
外壳：铝合金（表面涂层）
重量约1.5 kg（不含过程连接件）
2.性能参数
参数类别规格详情
精度基本精度±0.04%（满量程）
重复性±0.01%
稳定性±0.1%/年
温度影响零点漂移±0.015%/10℃
量程漂移±0.015%/10℃
响应时间≤90 ms（上升时间，90%响应）
过压能力表压：2倍满量程（最大100 MPa）
绝压：1.5倍满量程（最大150 MPa）
差压：10倍满量程（最大100 kPa）
静压影响差压变送器：±0.02%/MPa（对差压测量）
振动影响±0.01%/g（5-2000 Hz）
电磁兼容性（EMC）符合IEC 61326-1（工业环境抗干扰）
3.通信与接口
参数类别规格详情
数字协议HART 7（支持设备描述语言DDL、多变量测量、远程调零/调量程）
BRAIN（横河电机专用协议，支持快速通信、批量配置）
本地操作4位LCD显示屏+3个按键（支持参数查看、调零、调量程）
远程配置通过HART手操器、AMS Suite、ProComX软件进行参数修改、诊断、固件升级
三、功能特性解析
1.硅谐振传感器技术（EJA系列）
技术原理：
传感器核心为双硅谐振片，压力变化导致谐振频率偏移，通过数字电路转换为压力值。
优势：
高精度：谐振频率与压力呈线性关系，无机械磨损，长期稳定性优异。
抗干扰：对温度、振动、静压影响不敏感，减少补偿算法复杂度。
快速响应：谐振频率检测时间<1 ms，适合动态压力测量（如阀门控制、瞬态分析）。
2.多变量测量与数字通信
功能支持：
通过HART 7协议可同时传输压力值、温度值、设备状态等多变量数据。
支持远程调零、调量程、诊断报警，减少现场维护频率。
应用场景：
石油管道压力监测：实时上传压力、温度数据至控制室，优化输送效率。
化工反应釜控制：通过数字信号反馈实现压力-温度联锁保护。
1.Product positioning and core advantages
1.Brand and product line ownership
YOKOGAWA:
A global leading provider of industrial automation and test and measurement solutions,its products cover pressure transmitters,flow meters,temperature sensors,DCS systems,etc.,and are known for their high precision and high reliability.
CP34501 belongs to the EJA/EJX series of pressure transmitters,which are positioned in the mid-to-high-end industrial market and meet the needs of long-term stable operation under harsh working conditions.
2.Core advantages
High-precision measurement:
Basic accuracy±0.04%(full scale),temperature effect±0.015%/10℃,which is much better than ordinary pressure transmitters(±0.1%-0.5%),and is suitable for precision process control.
Multi-protocol compatibility:
Supports HART 7/BRAIN protocol,and can be seamlessly integrated with PLC,DCS,and SCADA systems to achieve remote monitoring,parameter configuration,and fault diagnosis.
Environmentally resistant design:
IP67 protection level(dustproof and waterproof),-40℃~+85℃operating temperature range,suitable for harsh environments such as outdoor,high/low temperature,and humidity.
Long life and low maintenance:
Using silicon resonant sensors(EJA series)or capacitive sensors(EJX series),no mechanical moving parts,life≥10 years,reducing downtime maintenance costs.
Safety certification:
Passed international explosion-proof certifications such as ATEX,IECEx,FM,CSA,etc.,suitable for flammable and explosive places(such as oil and gas fields,chemical plants).
3.Typical application scenarios
Oil and gas:
Wellhead pressure monitoring,pipeline transportation pressure control,separator level measurement.
Chemical and pharmaceutical:
Reactor pressure regulation,distillation tower pressure balance,sterile environment pressure control.
Power industry:
Boiler feed water pressure measurement,turbine steam pressure monitoring,cooling water system pressure control.
Water treatment and environmental protection:
Sewage treatment plant inlet pressure monitoring,reverse osmosis membrane pressure control,pump station pressure regulation.
Food and Beverage:
CIP(cleaning in place)system pressure monitoring,fermentation tank pressure control,filling machine pressure regulation.
2.Detailed explanation of technical parameters
1.Basic specifications
Parameter category Specification details
Model YOKOGAWA CP34501(EJA/EJX series variant)
Measurement type Gauge,Absolute,Differential(optional)
Range Gauge/Absolute:0-0.1 kPa~100 MPa
Differential:0-0.1 kPa~10 MPa(specific range is customized according to the model)
Output signal 4-20mA DC(two-wire)+HART 7/BRAIN digital signal
Power supply voltage 10.5-42V DC(standard)
Protection level IP67(compliance with IEC 60529)
Explosion-proof certification ATEX Ex ia IIC T6 Ga(intrinsically safe)
IECEx Ex ia IIC T6 Ga
FM/CSA Class I,Division 1,Group A-D
Material Process connection:316L Stainless steel
Sensor diaphragm:Hastelloy C-276/Tantalum(corrosion resistant)
Housing:Aluminum alloy(surface coating)
Weight Approx.1.5 kg(excluding process connections)
2.Performance parameters
Parameter category Specification details
Accuracy Basic accuracy±0.04%(full scale)
Repeatability±0.01%
Stability±0.1%/year
Temperature influence Zero drift±0.015%/10℃
Span drift±0.015%/10℃
Response time≤90 ms(rise time,90%response)
Overpressure capability Gauge pressure:2 times full scale(maximum 100 MPa)
Absolute pressure:1.5 times full scale(maximum 150 MPa)
Differential pressure:10 times full scale(maximum 100 kPa)
Static pressure influence Differential pressure transmitter:±0.02%/MPa(for differential pressure measurement)
Vibration influence±0.01%/g(5-2000 Hz)
Electromagnetic compatibility(EMC)Complies with IEC 61326-1(anti-interference in industrial environments)
3.Communication and interface
Parameter category Specification details
Digital protocol HART 7(supports device description language DDL,multivariable measurement,remote zero/range adjustment)
BRAIN(Yokogawa Electric’s dedicated protocol,supports fast communication and batch configuration)
Local operation 4-digit LCD display+3 buttons(supports parameter viewing,zero adjustment,and range adjustment)
Remote configuration Parameter modification,diagnosis,and firmware upgrade through HART handheld operator,AMS Suite,and ProComX software
III.Functional characteristics analysis
1.Silicon resonant sensor technology(EJA series)
Technical principle:
The core of the sensor is a dual silicon resonator.Pressure changes cause the resonant frequency to shift,which is converted into a pressure value through a digital circuit.
Advantages:
High precision:The resonant frequency is linearly related to pressure,there is no mechanical wear,and the long-term stability is excellent.
Anti-interference:Insensitive to temperature,vibration,and static pressure,reducing the complexity of the compensation algorithm.
Fast response:Resonance frequency detection time<1 ms,suitable for dynamic pressure measurement(such as valve control,transient analysis).
2.Multivariable measurement and digital communication
Function support:
Pressure value,temperature value,equipment status and other multivariable data can be transmitted simultaneously through the HART 7 protocol.
Support remote zero adjustment,range adjustment,diagnostic alarm,and reduce the frequency of on-site maintenance.
Application scenario:
Oil pipeline pressure monitoring:Real-time upload of pressure and temperature data to the control room to optimize transportation efficiency.
Chemical reactor control:Realize pressure-temperature interlock protection through digital signal feedback.
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