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1. Determination of product range From the absolute safety considerations of the product, it is generally preferred to make the working pressure value 60%-80% of the standard range value. The overload pressure caused by abnormal conditions may occur in the whole measurement system. Maximum overload. When measuring the fluid pressure of the dynamic pipeline, the water sag effect should also be considered, and the product load should be appropriately increased. We can also consult with us.
2, product accuracy selection Product grade according to a number of parameters, the higher the file level, the more expensive the price. Users can request various parameters and a single parameter accuracy index according to the detected working conditions, so as to achieve higher precision requirements at a lower price. The three precision indicators given by the product are calculated using the international least squares method or the end-base translation method. When using a sensor. The accuracy level determination should be based on the maximum error option assigned to the sensor by the measurement system. Additional errors introduced by the zero time drift, zero and full temperature coefficients should sometimes be considered.
3. Selection of sensor and transmitter According to the nature of the pressure measured by the user, firstly, the gauge pressure (relative to the local atmospheric pressure), differential pressure, absolute pressure or negative pressure type should be determined. If the level is measured, determine if there is free atmospheric pressure above the level or sealed container pressure. If you measure the liquid level in a sealed pressure vessel, you should use a differential pressure product.
4. Diffused silicon pressure transmitter selects the product's operating temperature range. The product has been linearly compensated before leaving the factory. Some of these series of transmitters have been integrated with temperature compensation after the circuit has been assembled. The scope of compensation is indicated in the individual product introduction. If the user has special requirements, you can negotiate with our company. For users who use a wide temperature range and require high total accuracy, software can also be used to perform temperature error correction in the secondary meter data processing. Exceeding the compensation zone, the temperature coefficient indicator may exceed the standard, but it can still be used. Long-term operation in the temperature limit area, product life will be greatly shortened. The user's working conditions, such as long-term work in low temperature or super-index high temperature areas. Can be negotiated with our company.
5. Selection of differential pressure sensor and transmitter Universal differential pressure sensor and transmitter are usually used in the case of positive pressure difference between high pressure end pressure and low pressure end pressure. Although diffused silicon sensor can also be used for negative differential pressure, Generally, the two thrust ends are basically symmetrical, but the negative pressure end is generally not calibrated. If the user requires high symmetry of the two pressure ends, special notice is required. The low-voltage end is likely to be used in the system for ultra-negative range. In this case, we need to negotiate with our company.
6. Frequency response characteristics The natural frequency of the diffused silicon pressure transmitter is higher than that of other products. In addition, more cases are caused by the influence of the structural parameters of the pressure-sensing cavity of the sensor structure and the size of the rigid body of the sensor structure. The latter does not. It may not be long-term, so it is mainly caused by the pressure chamber. Users can negotiate with our company when ordering.
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