1. Appearance check: Check the appearance of the sensor to be inspected. If it is found that the appearance of the sensor is cracked, the sensor may be damaged.
2. Rough inspection of the line: The power supply line, signal line and shielded line of the sensor are coaxial cables, which can be tested with a multimeter (ie, power line - signal line, power line - shielded line, signal line - shielded line). If a short circuit, disconnection, or a drop in insulation performance indicates that the sensor may be damaged.
3. Measure internal resistance: When there is no dedicated detection device, the input impedance ZI and output impedance ZO of the sensor can be measured with the ohm file of the digital multimeter, and the measured value and the nominal value of the product certificate provided by the manufacturer For comparison, when the measured value exceeds the allowable range, it indicates that the sensor may be damaged (Note: The self-numerical value of the multimeter to be used should be accurate, and it is better to use after measurement verification/calibration).
4. No-load detection:
Remove all sensors and access measurement circuits one by one. Under no-load (no-load) conditions, a well-performing sensor will quickly return to zero and the displayed value will be more stable, while the damaged sensor may show a digital jump. Can not return to zero and other phenomena. After the manual clearing the above phenomenon will still be repeated. Connect all sensors, still carry out no-load measurement, remove a sensor and observe whether the displayed value can be stable, then the sensor After it is still connected, the other sensor is removed and measured. All sensors are measured in sequence. If it is found that the value returned to normal after a sensor is removed, the sensor may be damaged.
5. Load check: When the above method cannot be used to determine the damaged sensor, load calibration can be performed on all sensors using the standard calibration method. The load test is performed on the sensors one by one using the standard weight of 1t. The undamaged sensor shows the measured value as the superimposed value of the standard weight gradually loaded, and the measured value displayed by the damaged sensor will have a large deviation from the superimposed value of the standard weight gradually loaded. .
Tungsten Carbide Dies And Molds
Carbide molds are more than ten times or even dozens of times longer than steel molds. Carbide molds have only high hardness, high strength, corrosion resistance, high temperature resistance and small expansion coefficient. Generally, tungsten and cobalt are used.
Such as market standard materials YG3, YG6, YG6X.YG8.YG15, YG20, YG20C, YG25 and HU20, HU222, HWN1 (non-magnetic alloy mold), etc., using the original carbide material, low pressure sintering and other special processes, the toughness will be better than conventional production To be better, the service life will also increase 3-5 times.
Cemented Tungsten Carbide Dies & Molds are widely used in wire rod, powder pressing, medicine, battery, petroleum and mining fields.
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