The calibration of the sensor of hydraulic universal testing machine

The calibration of the sensor of hydraulic universal testing machine

Taking the sensor with a measuring range of 50kN as an example, the calibration operation of sensors with other measuring ranges is the same.　　1. Calibration of the range (range): 　　①. Select the range (range): 　②. Clear the value of the indication: it should be cleared when the force sensor is not stressed.　　③. Select a calibration point 10.000kN: just click the line with the mouse. (The calibration points should be calibrated in order from small to large) 　　 Apply force to the sensor, and measure the current force of the sensor with a standard dynamometer; 　　 When the standard dynamometer shows that the current sensor’s force is 10.000kN, immediately Click the calibration button.　　④. Select the second calibration point: click the line with the mouse.　　 Apply force to the sensor. When the standard dynamometer shows that the current force on the sensor is 20.000kN, click the calibration button immediately.　　⑤. Click the calibration points 30, 40, 50 in turn, and calibrate the range (gear position) according to the above steps.　　2. Calibration of the second range (25kN range): 　　①. Select the second range (25kN range): 　　②. Zero indication: 　　③. The calibration method of each calibration point is the same as the introduction of calibration.　　3. Calibration of other gears (range): The method of 　　 is the same.　　 Two. Calibration of the extensometer 　　 Take the extensometer model 25/50 as an example: the range of the extensometer is 25mm and the gauge length is 50mm.　　 The calibration operation of other range extensometers is the same.　　1. Calibration of the range (range): 　　①. Select the range (range): 　②. Clear the indication: It should be cleared when the distance between the knife edge (chuck) of the extensometer is the gauge length.　　 Use extensometer gauge (or caliper) to fix the position of the two knife edges.　　③. Select a calibration point 25.0mm: just click the line with the mouse. (The calibration points should be selected in order from small to large for calibration) 　　 Increase the distance between the knife edges by 25mm, that is, adjust it to 75mm; 　　④. Click other calibration points in turn, and calibrate the range (gear position) according to the above steps.　　2. Calibration of other gears (range): 　　 The calibration method is the same gear (25mm range). three. Displacement calibration: 　　1. Method 1: 　　Encoder pulse: multiply the corresponding pulse parameter by 4 and then fill it in. One revolution of the encoder is equivalent to: if the encoder is fixed on the lead screw, one revolution of the encoder is equivalent to the lead screw pushing the pressure plate (or beam) to move the displacement equivalent to the lead screw pitch. Fill in the wire here. Distance can be.　　2. Method 2: 　　 If the method 1 can not complete the calibration normally, this method can be used: 　　①. Clear the displacement.　　②. Move the pressure plate (or beam) to move a certain distance, and use a caliper (or other measuring tool) to measure the actual moving distance of the pressure plate (or beam). For example, the actual measurement is 100mm, but the software displays 105mm; fill in the corresponding value and click the 'Apply' button to complete the calibration.

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