Step Two: Testing Insulation Resistance Generally, we require lead testing sensors and sensor body

Section 1191 Sanya Detection Description: Step One: Check the output of the zero zero output, the sensor output value in the absence fadeless bulletin board paper of load cases, all load (including static load scale body, power transmission parts, etc.) have to be removed in the case of , the test sensor output. The resulting value of zero at the test sensor should be installed in the design requirements of the state of the sensor, to prevent the error caused by the weight of the impact sensor itself. The sensor should be connected to the power supply, the best use of the product specification or sample recommended excitation voltage. Millivolt output value of the test record sensor fadeless bulletin board paper excitation fadeless bulletin board paper voltage divided by the sensor, you come to the zero value of the sensor output (mV / V). Comparative fadeless bulletin board paper value of the output value of the sensor on the certificate (if possible) or with the corresponding sample sensor's data can be derived zero output of the sensor is qualified conclusions. Analysis: Sensor zero permanent changes in general because of the sensor or by instant impact leads to overload. The cyclical changes if the sensor zero may be due to the strain gauge damp or internal changes due to other causes fadeless bulletin board paper due, of course, this situation can also be detected and the insulation resistance test bridge resistance of the sensor to check it out.
Step Two: Testing Insulation Resistance Generally, we require lead testing sensors and sensor body (elastomer shell, fadeless bulletin board paper etc.) between the impedance. Note that the sensor and the junction box and the instrument off. Debugging good insulation test box (table), then the cable leads one end of the sensor (output, input, shielded wire, etc.), one end of the sensor body (elastomer shell, etc.). General requirements, the impedance 5000MΩ. Note: The input and output impedance not use insulated box table pen test sensor, because the insulation box pressure value is higher than the output voltage electrical components fadeless bulletin board paper inside the sensor. Analysis: We generally require 5000MΩ sensor lead wire with insulation resistance between the elastomer. Insulation value may be due to the low moisture sensor bridge or partial bridge damage. Particularly low insulation resistance ( 1KΩ) may be severe and lead to moisture sensor bridge and elastomer short or internal wiring insulation breakdown damage. Sensor insulation direct manifestation of the low sensor output is unstable and will change with changes in environmental conditions, even by the interference of the printer to work. The third step: Weighing bridge impedance sensor test is to check the integrity of the test bridge fadeless bulletin board paper impedance sensor bridge, testing, should the sensor with junction boxes and other test equipment is disconnected. Input and output impedance test is followed by a digital multimeter pen to take impedance values at the input and output of the first volume of the sensor head, the numerical value of comparative testing and product certification; and confirm bridge symmetry refers to the amount fadeless bulletin board paper of digital multimeter Take one input with an output fadeless bulletin board paper impedance between the amount of turn four set of impedance values can be drawn in completely symmetrical compensation sensor, the poor value of the four groups of impedance values must not be greater than 1Ω (low precision multimeter fadeless bulletin board paper the value shall not be greater than 2Ω). Analysis: changes in impedance bridge is often due to damaged or broken bridge, electronic components failure or an internal short circuit. This may be due to the large current fadeless bulletin board paper or voltage (lightning fadeless bulletin board paper or welding current) breakdown burned bridge, or due to fatigue caused by shock or vibration, or ultra-high temperature and other causes. Step four: Test the sensor output of the sensor individually connected to the power supply, the use of excitation voltage 10 ~ 15VDC. The output end of the sensor in the millivolt table (or multimeter in DC millivolt range), based on the use of state of the sensor is installed in the loading end of the load sensor, observing sensor 5 of the Eighth National Seminar weighing technology The output variation. Analysis: fadeless bulletin board paper Under normal circumstances, fadeless bulletin board paper the sensor should have a positive output. If the output of the sensor is abnormal, the sensor may be due to incorrect fadeless bulletin board paper wiring or strain gauge sensor and the elastomer matrix loss, as a result of internal circuit. About sensor checklist paper sensor to provide customers with a checklist intended to guide our users to detect the sensor, please fill out as much as possible to detect the contents of this report in accordance with the table. On the one hand, the company's quality analysis sensor can determine the user's failure to use the content on the basis of the content, and thus the user side carry out the purpose of the guidance and help; on the other hand, the user is returned product, the sensor can be based on user company Information provided in the table carry out the purpose of the determination to improve the relevance and productivity analysis to accelerate the speed of information feedback. Eventually we hope to promote the sound development of the underlying technology of sensors and scales in the two-way communication.
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