1 Working principle
The CNPS-BC Pump Punch Speed Sensor is an inductive proximity switch sensor used in the oil field to measure pump or turntable speed. It has a wide range of power supply voltage, high repeatability, fast frequency response, long service life, vibration resistance, corrosion resistance and waterproof.
In addition to oil fields, this proximity switch sensor is also suitable for various control such as machine limit, detection, counting, speed measurement, liquid level signal, automatic protection, etc. It is widely used in machinery, mining, metallurgy, plastics, textile, chemical industry, light industry. , tobacco, electricity, railways, military and other departments.
2 Technical indicators
1, working temperature: -25 ~ 70 ℃
2, rated working voltage: 5~30VDC
3, the maximum output current: 200mA
4, effective action distance: ≤ 30mm
5, the highest working frequency: 100Hz
6, with polarity and short circuit protection
3 Installation and use
1, lead line color standard: brown power + blue output
2, installation and use:
The pumping sensor can be fixed to the mud pump head by the bracket, or the appropriate part of the turntable, and the closest distance between the position of the sensing surface of the measured object and the end surface of the sensor is within 30 mm. (According to the influence of the use environment, the rated working distance is generally taken. 80%), plus the working voltage, when the end of the inductive sports sensor is close, the indicator light is on; when away from the sensor, the indicator is off.
The turntable speed sensor can be fixed to the appropriate part of the drive shaft of the turntable with the bracket. It should be convenient to install and repair. The model of the drill is selected. A piece of iron with a length and width of 30mm is welded on the shaft of the drive shaft or the airbag clutch. The position of the end face should be close to the end face of the sensor. Adjust the fixing nut of the sensor so that the distance between the iron sensor is within the effective range of the working distance.
4 General fault judgment and elimination
If the pump and the rotary speed sensor use no signal output under normal rotation, first observe whether the indicator light on the sensor flashes accordingly. If the indicator light is off or steady, check whether the extension cable is open or shorted.
After determining that the extension cable is normal, test the operating voltage of the sensor, and there should be a corresponding working voltage between the brown and black of the lead line.
If the working voltage is normal, the metal body can be close to the end face of the sensor, the indicator light should be on, and should be off when away, otherwise the sensor is damaged.
If the sensor is not damaged, adjust the distance between the sensor and the measured object until the indicator light is on and off.
If the pump speed indicator is faulty, it must be completely sealed at the factory. It cannot be disassembled and repaired on site, and needs to be repaired by the factory.
Strictly follow the wire color standard wiring marked in this manual. It must be powered by the tributary power supply and ensure that the power supply ripple factor is <3%.
Care should be taken not to use metal shavings or oil stains with metal shavings to contaminate the sensing surface to avoid magnetic short circuits and malfunction of the sensor. The installation point should be kept away from direct sunlight to improve its reliability.
Do not exceed the rated technical parameters using the laying of the cable, so as not to hinder the on-site operation of the well site staff and the safety and reliability of the erection. If the power line and power line pass near the proximity of the switch point line, in order to prevent the proximity switch from malfunction or damage, shield it with a separate metal tube.
Due to the different assembly positions, the number of pulses generated by the sensor does not necessarily match the pump stroke and the rotational speed, and can be solved by setting the correction factor by the receiving instrument.
When the proximity switch uses an inductive load, if the system has a large interference pulse, clear the interference pulse suppression device near the proximity switch terminal.