台湾泰仕PROVA400交直流瓦特钳表是一款功能强大的电力测量工具，广泛应用于工业、商业和科研领域。它采用先进的真均方根值（True RMS）技术，能够精确测量交流和直流的功率、电流和电压。该钳表的交流功率测量范围可达240kW，电流测量范围为交流和直流400A，电压测量范围为交流400V和直流600V，可满足多种复杂环境下的测量需求。

PROVA400的设计注重实用性和便携性。其钩部尺寸最大可达23mm，能够轻松夹持较粗的导线，测量导线线径可达23mm。钳表采用3 3/4 LCD带模拟线段图的显示方式，使读数更加直观清晰。此外，该设备还具备手动范围选择功能，以及过载警示功能，当测量值超过量程时，最左边一位数字会闪动，提醒用户注意。

在性能方面，PROVA400表现出色。其取样率为每秒2次（数字）和每秒20次（模拟线段图），能够快速准确地捕捉电力参数的变化。设备的工作温度范围为-10℃至50℃，工作湿度小于85%（相对湿度），储存温度和湿度分别为-10℃至50℃和小于75%（相对湿度），适应各种恶劣环境。此外，该设备的消耗电流约为10mA，使用9号AA电池，方便用户在无电源的场合使用。

PROVA400的尺寸为183mm（长）×63.6mm（宽）×35.6mm（高），重量仅为190克（含电池），便于携带和操作。其附件包括皮袋、说明书和两节1.5V电池，为用户提供了完善的使用体验。

The Taiwan TES PROVA400 AC/DC Watt Clamp Meter is a powerful electrical measurement tool widely used in industrial, commercial, and scientific research fields. It employs advanced True RMS technology, enabling precise measurement of AC and DC power, current, and voltage. The clamp meter has an AC power measurement range of up to 240kW, with current measurement ranges of 400A for both AC and DC, and voltage measurement ranges of 400V for AC and 600V for DC. This makes it suitable for a variety of complex measurement scenarios.

The PROVA400 is designed with practicality and portability in mind. Its jaw size can reach up to 23mm, allowing it to easily clamp onto thicker wires, with a maximum wire diameter for measurement of 23mm. The clamp meter features a 3 3/4 LCD display with an analog bar graph, making readings more intuitive and clear. Additionally, the device has a manual range selection function, as well as an overload warning function. When the measured value exceeds the range, the leftmost digit will flash, alerting the user.

In terms of performance, the PROVA400 is outstanding. Its sampling rate is 2 times per second (digital) and 20 times per second (analog bar graph), allowing it to quickly and accurately capture changes in electrical parameters. The device operates within a temperature range of -10℃ to 50℃, with a relative humidity of less than 85%. The storage temperature and humidity are -10℃ to 50℃ and less than 75%, respectively, making it suitable for various harsh environments. Additionally, the device has a low current consumption of approximately 10mA and uses 9V AA batteries, making it convenient for use in locations without power sources.

The PROVA400 has compact dimensions of 183mm (length) × 63.6mm (width) × 35.6mm (height), and weighs only 190 grams (including batteries), making it easy to carry and operate. The package includes a carrying case, user manual, and two 1.5V batteries, providing a complete user experience.