Working temperature: -40~+85 ℃, temperature drift of 0.05%/℃.

● Protection level: IP68.

● Output format: Three wire voltage or current output.

● Frequency response: 0-10kHz,

The attenuation of amplitude frequency characteristics is less than 1% from 0 to 1kHz, and less than 5% at 10kHz;

Phase frequency characteristics: 0-1kHz phase difference less than -10 °, 10kHz phase difference less than -100 °

● Voltage output form sensor power supply:

1) +12dc~+30VDC power supply, output range 0.1-10.5V or 1-5V or 0.5-4.5V, power consumption ≤ 12mA (excluding output current);

2) -18Vdc~-24Vdc power supply, output range -2~-18V, power consumption ≤ 12mA (excluding output current);

3) ± 12Vdc~± 15Vdc power supply, output 0~+5V or 0~+10V or -5~+5V or -10~+10V power consumption ≤ ± 12mA (excluding output current).

Current output form: Sensor power supply:+18Vdc~+30VDC power supply, 4-20mA current output

● Ripple (maximum peak to peak output noise when measuring constant gap): The output ripple of the sensor in voltage output form is not greater than 20mV; the output ripple of the sensor in current output form is not greater than 30uA.

● Load capacity:

The output impedance of the sensor in voltage output form shall not exceed 51 Ω, and the maximum length of the driving signal cable shall be 300m;

The maximum load resistance of sensors with 4-20mA current output form is not greater than 750 Ω, and the output changes by -1% when equipped with the maximum load resistance.

● External dimensions

outside2.1 Outline dimension table

● Measurement parameters:

outside2.2 Measurement parameter table

1、 Installation

When the measured object is a circular axis and the center line of the probe is orthogonal to the axis line, it is generally required that the diameter of the measured axis be equal to the diameter of the probe3More than twice the size, otherwise the sensitivity of the sensor will decrease. When the size of the measured surface is the same as the diameter of the probe head, the sensitivity will decrease to70%about.

The thickness of the measured object can also affect the measurement results. Generally, the thickness is greater than0.1mmThe above steel and other magnetic materials with a thickness greater than0.6mmThe sensitivity will not be affected by weak magnetic materials such as copper and aluminum mentioned above.

The tested surface should be smooth and free of defects such as scratches, holes, protrusions, grooves, etc. (except for those specifically designed for key phase sensors and speed measurements). For vibration measurement, it is required that the surface roughness of the measured surface be within0.4～0.8μmFor displacement measurement, the surface roughness generally does not exceed0.8～1.6μm.

Unless otherwise specified at the time of ordering, sensors are usually used before leaving the factory45#Calibration of steel specimens requires only the same series of tested materials to produce similar characteristic equations.

The installation distance between sensors should not be too close to avoid adjacent interference. The minimum distance between sensor probes under normal circumstances is shown in the table below.

picture3.1Distance diagram between each probe

outside3Distance table between each probe

The installation of sensors should ensure that the distance between the probe head and the installation surface is not less than a certain distance. The engineering plastic head body should be completely exposed from the installation surface, otherwise the installation surface should be machined into a flat bottom hole or chamfered.

picture3.2Distance diagram between probe head and installation surface

The strength of the bracket used for sensor installation should be as high as possible, and its resonant frequency should be at least ten times the machine speed to ensure measurement accuracy.

When installing sensors, the linear measurement range of the sensor and the variation of the measured gap should be considered. When the total variation of the measured gap is close to the linear working range of the sensor, special attention should be paid(When ordering and selecting, the linear range of the selected sensor should be greater than the measured gap15%the above)Usually, when measuring vibration, the installation gap is set at the linear midpoint of the sensor; When measuring displacement, the installation clearance should be determined based on which direction the displacement changes or which direction the change is greater in. When the displacement changes in the direction away from the probe end, the installation gap should be set at the linear proximal end; On the contrary, it should be located at the far end.

By using the output of the measuring sensor to adjust the installation gap of the sensor, when the probe head has not yet exposed the installation hole, the metal around the installation hole may cause the sensor output to be equal to the voltage or current value corresponding to the installation gap. However, at this time, the probe is not measuring the object to be measured. Adjust the probe to the correct installation position, and the sensor output should be: first, a large saturation output(At this point, the probe has not yet been inserted into the installation hole)Next is the smaller output(At this point, place the probe into the installation hole)Continue to screw the probe into the installation hole, and the sensor output will become larger(At this point, the probe head is exposed through the installation hole, but there is a large gap between it and the measured surface)Twist in the probe again, and the sensor output is equal to the value corresponding to the installation gap. At this point, the probe is the correct installation gap.

picture3.3Error diagram of probe installation gap

2、 Calibration

The sensor should be recalibrated if it has not been used for more than one year or has been continuously used for more than two years.

YDYT9800Some products of the series of integrated eddy current displacement sensors are equipped with a small potentiometer at the end of the housing. By adjusting this potentiometer, it is easy to calibrate the linearity and sensitivity of the sensor. It is recommended to use the calibration device produced by our companyYD-20Static displacement calibrator, please seal the potentiometer tightly with silicone after calibration to prevent the resistance of the potentiometer from changing during use.

YDYT9800 Integrated Eddy Current Displacement Sensor: