Electrical Performance Parameters

Transport Conditions

· Temperature: -40℃ to +60℃;

· Humidity: 95% (+40℃);

· Vibration: 50m/s ²；

· Shock: 500m/s ²。

Installation Technology and Electrical Connection Technology

1 Sensor Body Installation

First, install the sensor before use. Select a suitable measurement point on the tested equipment. At the measurement point, there should be a smooth flat surface with at least φ24 diameter for sensor installation. To ensure accurate vibration acceleration data and ease of use, the sensor should be firmly installed according to the sensitive direction. The recommended tightening installation methods are prioritized as follows.

1.1 Screw Installation Method

The bottom surface of the sensor should be kept smooth. Between the sensor and the tested object, it is best to apply a layer of grease or wax oil to increase contact stiffness, then tighten with nominal screws to obtain the sensor's calibrated frequency response characteristics.

Screw installation: Recommended tightening torque is 3Nm.

1.2 Adhesive Installation Method

When drilling holes on the tested object is not allowed, adhesives approved by the equipment owner can be used, such as "502", Loctite "454" quick-drying glue, or others like epoxy resin glue, double-sided adhesive tape, etc. Adhesive installation affects the sensor's frequency and amplitude characteristics and may sometimes cause unacceptable measurement errors. Adhesive installation is sensitive to temperature changes and should be carefully selected based on actual engineering conditions.

1.3 Magnetic Base Method

The magnetic base installation method lowers the upper frequency response limit and causes abnormal low-frequency response of the vibration acceleration sensor. It should be used cautiously. The measurement range is easily limited by this method, and the magnetic force is greatly affected by temperature. After reaching a certain temperature, the magnetic pole capability rapidly degrades. Please be aware and choose carefully.

2 Electrical Connection Technology

This product's vibration part is a two-wire IC circuit product and must be powered by a constant current source. Direct DC power supply or other power methods are strictly prohibited, as they may damage internal components and cause no output. The correct electrical connection is shown in the figure below:

3 Cable Connection Technology

The selection of cables should comply with relevant standards. In harsh environments such as high temperature, high humidity, acid and alkali, and salt spray, cables with appropriate protection ratings should be used. If necessary, protective soft rubber should be used to fill gaps to prevent moisture, acid, alkali, and salt spray intrusion. After electrical connection of the cable, the cable should be fixed as close as possible to the sensor end. When possible, sensors should be kept away from strong acid and strong alkali environments to avoid contamination of electrical contact parts, which may affect or damage electrical connection performance.

The maximum length of the cable connecting the sensor and related equipment is 100 meters. Excessive extension of the connection length risks attenuation of the high-frequency components of vibration signals, increased temperature measurement errors, and intensified interference signals.

Cables should preferably be selected with the following parameter conditions: cable cross-sectional area ≥ 0.5 mm². ² Distributed capacitance not greater than 0.1 μF/km; line resistance not greater than 50 Ω/km.