一、Outline：
Oil mixing with water signal is used to monitor hydropower, thermal power plants and large-scale systems pumping oil mixing with water or water quantity. When the fuel tank, mixing with water or water in oil pipeline that is a warning signal to alert staff on duty promptly check the system to ensure the safe operation of generators.
一、 working principle
Device uses a capacitive principle. Capacitive sensors from the inner and outer electrodes (equivalent capacitance two plates) and circuit parts. When the oil mixing with water or water, due to the big difference between the two dielectric constant, by the inner, outer electrode capacitance value constituted a significant change. The sensor circuit generates a stable high frequency square wave amplitude, when the capacitance value changes, the square wave frequency is changed, after amplification of the signal processing, and outputs a corresponding alarm signal
三、Technical Parameters
■Power supply: DC24V ± 10%, or AC and DC common type DC220V, AC220V
■Power: 5W
■Relative humidity: ≤90%
■Operating temperature: 5 ℃ ~ + 50 ℃
■Storage: -25 ℃ ~ + 70 ℃
■Alarm contact output: Normally open a group
■Capacity: 5A / AC220V or 5A / DC30V
■Range setting: 2.5% and 5% optional
四、Dimensions and terminal diagrams
■24V / 220: annunciator working power, according to the polarity link
■J: signal output contacts (SPST)
■Signal power connector should use shielded cable, wire cross-sectional area of not less than 2.5mm2.
■Short circuit block for selecting alarm tranches, of which a 1 indicates that the alarm is connected to 5%, short circuit blocks represented 2,3 connected alarm is 2.5%, factory setting is 5%.
五、Installation
When the sensor is installed, it should ensure that the electrode length L2 (effective measurement range) segment completely submerged in oil.
Three methods of installation: top mounted, side-mounted, bottom mounting
Hit a hole in the corresponding position in the tank, and the car is good M36 × 1.5 thread, tighten the sensor is fixed, you can maintain a good sea l
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六、Selection Help
