中文介绍
Testo 511 是一款便携式绝对压力测量仪器，具有高精度和多功能的特点。它主要用于测量绝对压力，例如在风管、实验室和生产过程中的流量测量中进行密度补偿。此外，该仪器还可以计算气压和测量海拔高度。
Testo 511 的设计非常小巧便携，重量仅为 90 克，尺寸为 119×46×25 毫米。它配备了背光显示屏，即使在光线较暗的环境中也能清晰读取数据。该仪器的测量范围为 300 到 1200 百帕，精度可达 ±3 百帕。它还支持 8 种不同的压力单位，包括 hPa、mbar、Pa、mmH₂O、inH₂O、inHg、mmHg 和 psi。
Testo 511 的操作非常简便，用户只需输入现场海拔高度，即可将绝对压力读数转换为气压。此外，该仪器还配备了保护帽、腕带和腰带夹，方便用户在各种场合使用。其电池续航时间长达 200 小时，能够在 0 到 50 摄氏度的温度范围内正常工作。

English Introduction
The Testo 511 is a portable absolute pressure meter known for its high precision and versatility. It is primarily used for measuring absolute pressure, for example, for density compensation in flow measurements in ducts, laboratories, and production processes. In addition to this, the instrument can also calculate barometric air pressure and measure altitude.
Designed to be compact and easy to carry, the Testo 511 weighs only 90 grams and measures 119×46×25 millimeters. It features a backlit display that ensures clear readings even in low-light conditions. The device has a measuring range of 300 to 1200 hPa with an accuracy of ±3 hPa. It supports eight different pressure units, including hPa, mbar, Pa, mmH₂O, inH₂O, inHg, mmHg, and psi.
The Testo 511 is user-friendly. By entering the on-site altitude, users can easily convert the absolute pressure readings to barometric air pressure. The device also comes with a protective cap, wrist strap, and belt holder for convenient use in various settings. With a battery life of up to 200 hours, it can operate effectively within a temperature range of 0 to 50 degrees Celsius.