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This post was last edited by shmy666 on 2020-7-14 at 16:17. Keywords: Rosemount transmitters http://china-rosemount.cn/ Whether when selecting Rosemount transmitter products or during their installation and use, it is necessary to understand what factors affect the performance of these transmitters Next, Spryss will take us through the specific factors that can affect the performance of Rosemount transmitters. I. The impact of the range ratio: The range ratio of a Rosemount transmitter refers to the ratio of the maximum value to the minimum value that the transmitter can measure, while still meeting the accuracy requirements. Generally, the larger the range ratio, the lower the measurement accuracy. A pressure transmitter with a large range ratio has many advantages, as it can be used in various different applications after being calibrated. However, in practice, setting the range ratio too high can lead to many problems with measurement stability. Most differential pressure transmitters maintain their reference accuracy within a range ratio of 10:1, and this accuracy is not affected by the range ratio. However, there is still a considerable number of differential pressure transmitters whose range ratio ensuring reference accuracy is less than 10:1; this ratio is even as low as 3:1 and 2:1 ； Furthermore, for different range codes of the same model of product, the range ratio that ensures the reference accuracy can also vary significantly; these are all aspects that users need to pay close attention to when calculating the accuracy affected by the range ratio. II. Influence of temperature: In process applications, the process temperature and ambient temperature can vary significantly, and these will certainly differ from the conditions under which the transmitter was tested. This means that its performance will also differ from the reference accuracy specified. The effect of temperature on differential pressure transmitters is minimal when near the maximum range (i.e., a low range ratio), but it becomes significant when near the minimum range (i.e., a high range ratio), sometimes even beyond our expectations. According to the formulas provided in some product manuals for the combined effect of temperature on zero-point accuracy and range accuracy, if the maximum range ratio entered is 100, an impact of around 10% can be obtained. Some modern intelligent pressure transmitter models are equipped with internal temperature sensors to compensate for the thermal effects caused by changes in ambient temperature. Shanghai Mengyan Automation Equipment Co., Ltd. Address: Room 1119, Jiahong Building, No. 639 Guangfulin Road, Songjiang, Shanghai. Contact person: Xu Gong. Mobile phones: 18616582302 / 18616582330. QQ: 764861476. Email: sales@shmyzdh.com