以下是關于CD770數字萬用表的產品中英文介紹：

CD770數字萬用表是日本三和（SANWA）推出的一款緊湊型數字萬用表，專為工業(yè)電氣現(xiàn)場工作人員設計，能夠滿足多種測量需求。它采用堅固耐用的設計，外殼保護套使用抗撞擊的合成橡膠，即使在跌落的情況下，也能有效保護儀表。該萬用表具備大數碼的大屏幕液晶顯示屏，文字清晰易讀，3-3/4位4000數據顯示，最高精度可達0.5%。它能夠測量交直流電壓、交直流電流、電阻、電容、頻率等多種參數，并且具有通斷檢查蜂鳴器功能，當測量對象導通時會發(fā)出蜂鳴聲。此外，還具備數據鎖定、量程鎖定、相對值模式等功能，方便用戶觀察和記錄測量數據，排除測試導線對測量數據的干擾。標配鍍金表筆，防腐、防接觸不良，進一步提高了測量的精度。自動省電模式（30分鐘）可取消，有助于延長電池壽命。電流測試端子配備防誤插安全帽，提升了使用的安全性。其頻帶寬度為40-400Hz（正弦波），抽樣率為3次/秒。

The CD770 digital multimeter is a compact digital multimeter launched by SANWA of Japan, designed specifically for industrial electrical field workers to meet a variety of measurement needs. It features a robust and durable design with an outer protective cover made of impact-resistant synthetic rubber, which can effectively protect the instrument even in the event of a drop. The multimeter is equipped with a large-screen LCD display with large digits that are easy to read, and it provides 3-3/4 digit 4000-count display with a maximum accuracy of 0.5%. It is capable of measuring various parameters such as AC/DC voltage, AC/DC current, resistance, capacitance, and frequency. Additionally, it has a continuity check buzzer function that sounds when the measured object is conductive. The device also includes functions like data hold, range hold, and relative value mode, which facilitate the observation and recording of measurement data and eliminate the interference of test leads on the measurement results. It comes with standard gold-plated test leads, which are corrosion-resistant and prevent poor contact, thereby further enhancing the accuracy of measurements. The auto power-off mode (30 minutes) can be canceled to help extend battery life. The current test terminal is fitted with a safety cap to prevent incorrect insertion, enhancing the safety of use. The bandwidth is 40-400Hz (sine wave), and the sampling rate is 3 times per second.