上海四達電子SD-07B卡片式數(shù)字萬用表是一款輕便實用的電子測量工具。它采用卡片式設(shè)計，體積小巧，便于攜帶和操作，非常適合技術(shù)人員、電子愛好者和維修人員在各種場合使用。

該萬用表具備多種測量功能，能夠測試直流和交流電壓、電阻，并支持二極管測試和連續(xù)性檢測。其直流電壓測量范圍為20V和200V，交流電壓測量范圍為200V和500V，電阻測量范圍涵蓋200Ω、20KΩ和2MΩ。此外，它還配備了2000計數(shù)的LCD顯示屏，能夠清晰地顯示測量結(jié)果。

SD-07B萬用表還具備一些實用的功能，如最大數(shù)據(jù)保持功能，方便用戶記錄測量的最大值；低電量顯示功能則能及時提醒用戶更換電池。它采用手動量程切換，用戶可以根據(jù)測量需求選擇合適的量程。

該萬用表的外觀設(shè)計人性化，操作簡單，使用方便。其機身尺寸為115mm×58mm×12mm，重量僅為84克，攜帶十分輕松。此外，它還配備了標準的測試線和說明書，方便用戶快速上手。

The Shanghai Sida Electronic SD-07B Card Digital Multimeter is a compact and portable electronic measurement tool. Designed in a card size, it is lightweight and easy to carry and operate, making it suitable for technicians, electronics enthusiasts, and repair personnel in various settings.

This multimeter features a range of measurement functions, including the ability to test DC and AC voltage, resistance, as well as diode testing and continuity detection. It has a DC voltage measurement range of 20V and 200V, an AC voltage measurement range of 200V and 500V, and a resistance measurement range covering 200Ω, 20KΩ, and 2MΩ. Additionally, it is equipped with a 2000-count LCD display that clearly shows measurement results.

The SD-07B multimeter also includes practical functions such as a maximum data hold function, which allows users to record the maximum measured value, and a low battery display that promptly alerts users to replace the batteries. It uses manual range switching, enabling users to select the appropriate range according to their measurement needs.

The design of the SD-07B is user-friendly, with simple operation and convenient use. The device measures 115mm×58mm×12mm in size and weighs only 84 grams, making it very easy to carry. It also comes with standard test leads and a manual to help users get started quickly.