描述
Bently Nevada 3500/77M(176449-07)产品详情
这款4通道监测器接收来自专用压力传感器的输入，处理信号以获取关键压力测量值，并将其与用户可配置的警报设定值进行比较。
主要特性和功能：
4通道监测器：每个3500/77M模块最多可监测四个独立通道，从而能够从往复式压缩机上的多个压力传感器收集数据。
压力传感器输入：它接收来自Bently Nevada认证的压力传感器的输入。这些传感器通常是用于测量气缸压力的正电压第三方传感器。
信号调理：该监测器对原始压力信号进行调理，以获取与气缸压力运行相关的各种有意义的测量值。
机械保护：其主要目的是通过将监测到的参数与配置的警报和危险警报设定值进行比较，提供持续的机械保护。如果参数超出其限值，该模块会触发警报或启动自动停机，以防止压缩机受到潜在损坏。
基本设备信息：它为人员提供关键的操作和维护信息，有助于排除故障并优化压缩机性能。
测量变量：3500/77M的每个通道都提供几个与气缸压力相关的关键测量变量：
排气压力：排气冲程期间的压力。
吸气压力：吸气冲程期间的压力。
最大压力：气缸内达到的最高压力。
最小压力：气缸内达到的最低压力。
压缩比：最大压力与最小压力之比。
此外，它还计算三个与杆动力学相关的变量：
杆峰值压缩力
杆峰值张力
杆反转度
高精度和频率响应：
压力精度：+25°C(77°F)时，通常在压力传感器满量程的±0.5%以内，在更宽的温度范围（-30°C至+65°C）内，通常在±1.0%以内。
频率响应：所有配置的压力通道均为0至5.5 kHz，可捕捉动态压力变化。
缓冲传感器输出：每个监测器的正面都有一个同轴连接器，用于连接每个通道，提供传感器信号的缓冲输出。这使其能够轻松连接到便携式诊断设备（如数据采集器），以便在不影响主监测的情况下进行更深入的分析。
前面板LED：包括用于指示监测器状态（正常）、通信活动（TX/RX）和旁路模式的LED。
环境稳健性：专为工业环境设计，工作温度范围为-40°C至+85°C（-40°F至+185°F），湿度为95%（无凝露）。
与3500系统集成：可插入Bently Nevada 3500系列机架，并通过背板与其他模块（例如3500/22M瞬态数据接口(TDI)模块）通信。
订购信息（特定于176449-07）：
176449-07通常指3500/77M气缸压力监测器本身，通常与特定的I/O模块和接线端子配对使用。Bently Nevada产品通常具有基本模块零件编号，以及定义特定配置的附加数字。
应用：
本特利内华达3500/77M(176449-07)专为以下应用而设计：
往复式压缩机：其主要应用是监测以下行业大型往复式压缩机的气缸压力：
石油和天然气：天然气管道、炼油厂、加工厂。
化工和石化：化工生产设施。
发电：发电厂使用的压缩机。
Bently Nevada 3500/77M(176449-07)Product Details
This 4-channel monitor accepts input from specialized pressure transducers,processes the signals to derive critical pressure measurements,and compares them against user-configurable alarm setpoints.
Key Features and Functions:
4-Channel Monitor:Each 3500/77M module can monitor up to four independent channels,allowing it to collect data from multiple pressure transducers on a reciprocating compressor.
Input from Pressure Transducers:It accepts input from Bently Nevada-approved pressure transducers.These are typically positive voltage,3rd-party transducers used for measuring cylinder pressure.
Signal Conditioning:The monitor conditions the raw pressure signals to derive various meaningful measurements related to cylinder pressure operation.
Machinery Protection:Its primary purpose is to provide continuous machinery protection by comparing monitored parameters against configured Alert and Danger alarm setpoints.If a parameter exceeds its limit,the module triggers alarms or initiates automatic shutdowns,preventing potential damage to the compressor.
Essential Machine Information:It provides critical operational and maintenance information to personnel,aiding in troubleshooting and optimizing compressor performance.
Measured Variables:Each channel of the 3500/77M provides several key measured variables related to cylinder pressure:
Discharge Pressure:Pressure during the discharge stroke.
Suction Pressure:Pressure during the suction stroke.
Maximum Pressure:The highest pressure reached in the cylinder.
Minimum Pressure:The lowest pressure reached in the cylinder.
Compression Ratio:The ratio of maximum to minimum pressure.
Additionally,it computes three variables related to rod dynamics:
Peak Rod Compression
Peak Rod Tension
Degree of Rod Reversal
High Accuracy and Frequency Response:
Pressure Accuracy:Typically within±0.5%of the pressure transducer’s full-range at+25°C(77°F),and within±1.0%over a wider temperature range(-30°C to+65°C).
Frequency Response:0 to 5.5 kHz on all configured pressure channels,allowing it to capture dynamic pressure changes.
Buffered Transducer Outputs:The front of each monitor has a coaxial connector for each channel,providing a buffered output of the transducer signal.This allows for easy connection to portable diagnostic equipment(like data collectors)for more in-depth analysis without affecting the primary monitoring.
Front Panel LEDs:Includes LEDs for indicating monitor status(OK),communication activity(TX/RX),and bypass mode.
Environmental Robustness:Designed for industrial environments with an operating temperature range of-40°C to+85°C(-40°F to+185°F)and 95%non-condensing humidity.
Integration with 3500 System:Plugs into the Bently Nevada 3500 Series rack and communicates with other modules(like the 3500/22M Transient Data Interface(TDI)Module)via the backplane.
Ordering Information(176449-07 specific):
The 176449-07 typically refers to the 3500/77M Cylinder Pressure Monitor itself,often paired with specific I/O modules and termination blocks.It’s common for Bently Nevada products to have a base module part number with additional digits defining specific configurations.
Applications:
The Bently Nevada 3500/77M(176449-07)is specifically designed for:
Reciprocating Compressors:Its primary application is in monitoring the cylinder pressure of large reciprocating compressors in industries such as:
Oil&Gas:Gas pipelines,refineries,processing plants.
Chemical&Petrochemical:Chemical production facilities.
Power Generation:Compressors used in power plants.
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