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參數組合探頭傳感器KR939SB3

 

HF-SB3型一體化三參數（油溫、油位、振動）組合探頭，是公司HF-SB3系列冷卻塔風機安全監(jiān)控系統(tǒng)中，一種非總線結構的通用型組合探頭。它可以直接與“HF-SB3型風機安全監(jiān)控器”配接，實現(xiàn)單臺設備監(jiān)控。也可以與多種通用二次儀表，或計算機數據采集測控系統(tǒng)(DCS、PLC等)連接使用。

這種應用于風機減速箱安全運行監(jiān)測的組合探頭，在其內部分別集成了測量油溫、油位、振動信號的傳感、轉換和變送電路，直接輸出與這些安全參量對應的4～20mA標準電流信號，可以配接各種通用型二次儀表或計算機數字采集監(jiān)控系統(tǒng)。

 

KR939SB3 three 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.

 

Main technical performance and indicators

• External and installation structures;

KR939SB3 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].

 

 

 

 

 

 

 

 

[figure 2] the schematic diagram of the connection principle of the probe

1# power V+, red
2# public V-, black
3# temperature T, grey
4# vibrate A, blue
5# oil level L, brown
6# shielded G, shielding layer

polarity reverse protection。  

• Environmental characteristics：