Three parameter combined 三合一探头油温0-100振动0-20油位-10-40

这种应用于冷却塔风机安全运行监测的组合探头，在其内部分别集成了测量减速箱油温、油位、和风机机械振动信号的传感、转换和变送电路，探头直接输出与这些安全参量对应的4～20mA标准电流信号。该探头可以直接设备安全监控器配接，也可以与DCS，PLC计算机测控系统连接使用。 该探头能够全方向监测受控设备最为关键的安全运行指标---机械振动。它同时完成X、Y、Z三个正交方向的高质量振动测量符合标准化组织标准以及减速箱内部润滑油温度的测量。
   探头内部采用美国原产的微机械加工工艺振动传感器，传感器获取的振动信号再经由带通波器、变换器、放大器、真有效值转换器，zhui终由电压/电流驱动电路产生出与振动烈度成正比的4～20mA标准电流信号。
   该探头中集成了四个两线制4～20mA变送器，即可以与风机安全监控器配接，也可以直接与计算机数据采集测控系统(DCS、PLC等)连接使用。

温度测量特性： 润滑油温度测量范围：0～100 ℃ ， 温度测量综合误差：±3℃
●油位测量特性： 润滑油油位测量范围：-10～40㎜，   油位测量综合误差： ±5㎜ （0㎜处为减速箱正常油位下油限位置，被测介质必须是非导电性介质）
●振动测量特性： 振动测量范围：0～20 ㎜/s ，测量输出与振动速度的真有效值（RMS）成正比，振动测量频带范围：10～1000HZ，振动测量综合误差：±1㎜/s
●信号输出特性： 电流型输出：DC/4～20mA ， zhui大负载电阻测算（含传输线内阻）Rmax=（V－15）/0.02  （其中V为供电电压）
●供电特性： 推荐工作电压：DC/24V±2V，空载工作电压：DC/15V，zhui高过载电压：DC/36V ，zhui大瞬时工作电流：200mA，内设电压极性反接保护  
●环境特性： 环境温度范围：－20～80℃，环境湿度范围：0～100％（端口使用704硅橡胶密封），环境振动条件：不小于3倍振动量程上限。

WL900型工业循环水中心管理系统	WLL970型可变标度多通道监控仪
KWL933型工业凉水塔风机控制器	WL990型64路点位检测仪
WLL939B型风机安全运行监控器	WL93306三参数组合探头
WLL6939B3型风机安全监控器	WLLO939SB3型三参数组合探头
WLL9939B4型风机安全监控器	WLL9939SB4型三维振动速度及温度变送器
WLL32型双通道设备安全监控器	VWRT-2T型振动速度及温度变送器
WLL34型四通道设备安全监控器	WART-1BT型三维振动加速度及温度变送器
WLL939B4-4型设备安全监控器	WLL939NCS型风机转速频率表
GPT/DPT系列两线制压力/压差变送器	RT2系列两线制温度变送器

hree parameter combination (oil level temperature vibration combination) probe is a general type combined probe that is used in cooling tower fan safety monitoring system. It can be connected with a variety of general two instruments, or computer data acquisition and control system (DCS, PLC, etc.).

This is applied to the fan gear box combined probe for safe operation of monitoring, in its internal integrated measuring temperature, oil level, vibration signal sensing, conversion and transmission circuit of direct output and the security parameters corresponding to the 4 ~ 20mA standard current signal, can be matched with a variety of general-purpose two meter or      computer digital acquisition monitoring system.

The probe temperature measurement with platinum resistance sensor and semiconductor integrated device; level measurement using a capacitive sensing principle; sensor for measuring      vibration, mechanical vibration acceleration signal acquisition, band-pass filter, an integral and true effective value through the amplifier (RMS) converter, the vibration waveform in the effective bandwidth of it effective value conversion; finally, the oil temperature, vibration generated by the 4 ~ 20mA output.

three parameter combination probe, the probe is an external thread form, is installed in the threaded installation hole of the fan reduction box, and the probe rod is inserted into the reduction box, so as to get the lubricating oil temperature, the lubricating oil level and the box vibration signal in the reduction box, and complete the transformation output. Thread specifications and probe inserts need to be declared at the time of order. See Figure1.

[figure 1] exterior pattern

• Temperature measurement characteristics;

Measurement range of lubricating oil temperature：0～100 ℃ ，Compreh

-ensive error of temperature measurement：±1℃

• Oil level measurement characteristics:

Measurement range of lube oil level：0～50㎜（10 mm for the gear box under normal oil level oil limit position）, Maximum error of oil level measurement： <= ±1㎜

Ambient temperature from -40 to 65 C（Extreme temperature resistance from -50 to 150 C）

• Vibration measurement characteristics：

   Range of vibration measurement：0～20 ㎜/s ，The measurement output is proportional to the effective value of the vibration velocity (RMS). Frequency range of vibration measurement: 10～1000HZ, Maximum error of vibration measurement: <=±1㎜/s

• Signal output characteristics;

Active current type output：DC/4～20mA ，Requirements for passive resistive load。Maximum load resistance：< 300 Ohm

• Supply characteristics of power supply：

working voltage：DC/24V±4V，Maximum protection voltage：DC/30V ，Rated current：DC/80mA, Maximum instantaneous working current：120mA，Internal voltage Ambient temperature range：－20～80℃，Ambient humidity range：0～100％（The port is sealed with 704 silicone rubber seals）

• Electrical connections：

Two four bit terminals：+24V power supply、GND、It 、t-COM、Io、o-COM、Iv、v-COM：It temperature current signal output；Io oil level current signal output；Iv vibration current signal output：The typical connection refer to the schematic diagram of the connection principle of the probe [figure 2].