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Pro'sKit MT-1820 User Manual
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Pro'sKit MT-1820 User Manual

Professional digital multimeter
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Professional Digital
Multimeter
MT-1820
U s e r ' s M a n u a l

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Summary of Contents for Pro'sKit MT-1820

  • Page 1 Professional Digital Multimeter MT-1820 U s e r ’ s M a n u a l...

  • Page 2: Table Of Contents

    Index General Open Package Inspection Safety Note Safety Symbol Description Front Panel Description Property DC Voltage (DCV) AC Voltage (ACV) DC Current (DCA) AC Current (ACA) Resistance Diode and Continuity Test Capacitance (C) Frequency (Hz) Transistor Test Temperature Test Other Function & Instrument Maintenance...

  • Page 3: General

    General The instrument is a high performance, high accuracy, 3 5/6 digit multi-meter, it uses the LCD with 33mm high figure to make the reading clear, the display simple and the operation convenient. The instrument can measure DC and AC voltage, DC and AC current, Resis- tance, Capacitance, Frequency, Duty Circle, Transistor, Diode and Continuity test; And it also has the features of Bar Graph, Unit Indication, Data Hold, Relative Value Measurement (REL), USB Interface, AUTO/MANUAL range selection, Auto Power Off and Alarm Buzzer. The instrument adopts the directly driven 4 digits microprocessor and dual-integral A/D converter, which provide the high solution and high accuracy digital displaying driver. Because of its outstanding features, it is an excellent tool and most suitable for lab, factory, maintenance and repair users. Open-package Inspection Open the gift box and take out the instrument, carefully check the follow- ing accessories. If any accessory was lost or damaged, please contact the manufactory at once. • Digital Multimeter pc • Operation Manual pc • Test Lead set • Temperature Cable pc • USB Cable pc • Software disc pc • Transistor test accessory pc Safety Note The instrument meets the standard of IEC00 (safety standard promulgated by the International Electrician Committee). Design and manufacture com- plied with the standard of Pollution Degree 2.
  • Page 4 Warning To avoid endangering the safety of the users, should read the operation manual carefully before operation, and strictly abide by the safety warning information and operation description to use the instrument. . Caution to avoid the electric shock when measuring the voltage higher than 30V, the current higher than 0mA, AC Power Lines with Inductive Load and the AC Power Lines during the period of Electric Power Fluctua- tion. 2. Before measuring, should check if the function knob is set in the correct range, make sure the test lead connects reliably, links up correctly, and insulates properly to avoid the electric shock 3. It meets the requirements of the safety standard only to use the instrument with the equipped test lead. If the test lead is broken, should replace it by the same type and same electric specification test lead. 4. Do not replace the inside fuse by the unconfirmed one. Only replace it by the same type and specification fuse. Before replacement, should keep the test lead off the tested point to make sure there is no any signal at the input terminal.

  • Page 5: Safety Symbol Description

    maximum voltage is printed on the front panel of the instrument, do not input the range limit specified to avoid the electric shock and instrument damage 9. Do not measure any voltage when connecting the test lead with the current terminal to avoid damaging the instrument and endangering the safety of the users. 0. Do not try to calibrate or repair the instrument, should operate it by the specially trained or qualified professional people. . The function/range selection knob should be set in the correct range when measuring. When switching the function/range selection knob, keep the test lead off the tested object to make sure there is no any signal at the input terminal. Do not switch the function/range selection knob when measuring. 2. When LCD displays “ ”, please replace the battery in time to make sure the measuring accuracy. 3. Do not allow to measure the voltage when connecting the test lead with the current terminal! 4. Do not try to modify the inner circuit at will to avoid damaging the instru- ment and endangering the safety of the users. Safety Symbol Description Warning High Voltage! Dangerous! DCA & ACA Dual Insulation...

  • Page 6: Front Panel Description

    Front Panel Description MT-1820 . Instrument Model Number 2. LCD Display 3. HOLD: Date Hold button, press the button, the value is held on LCD; Press the button again, exit the hold mode RANGE Hz/DUTY HOLD SELECT AUTO POWER OFF MAX/MIN and get into the normal measuring status. REL/RS232 Ω ˚C 4. HZ/DUTY: Frequency/Duty Circle selection button, press the button to switch between the Frequency and Duty Circle mode at Frequency Range; Press the button VΩHz ˚C uAmA to switch to Voltage or Current/Frequency/Duty Circle MAX 10A MAX 400mA 1000V DC 10sec FUSED 750V AC...

  • Page 7: Property

    2. input terminal: measure Voltage, Frequency/Duty Circle, Resistance, Capaci- VΩHz tance, Diode and Continuity positive input terminal, insert the red test lead. Property General Feature - Display: LCD -2 Max Display: 5999 (3 5/6) counts automatic polarity display and unit display. -3 Measuring method: dual-integral A/D converter -4 Sampling rage: 3 times/second -5 Over range indication: display “OL” -6 Low battery indication: “ ” appearance 1-7 Operation environment: 0~40˚C relative humidity <80% 1-8 Storage environment: -10~50˚C relative humidity <80% -9 Power: 2pcs .5V batteries (AAA battery) -0 Dimension: 92mm x 95mm x 48mm - Weight: Approx. 390g (including batteries) Technic Property 1. Accuracy: (a% × reading + digits) at 23 ± 5˚C , relative humidity <75%. 2. One year calibration guarantee since the time dispatched from the factory.

  • Page 8: Ac Voltage (Acv)

    Note: a) Do not measure the voltage higher than DC 000V or AC 750V. b) When measuring the high voltage, caution to avoid electric shock. Cut the connection between the test lead and tested circuit at once after measure- ment. C) At the Manual Range mode, if “OL” is displayed on LCD, it indicates the tested voltage value has exceeded the present range limit, please select the higher range to complete the measurement. Range Accuracy Resolution MT-1820 SELECT 600mV 0.mV RANGE SELECT Hz/DUTY HOLD AUTO POWER OFF MAX/MIN REL/RS232 ±(0.5%+4d) ˚C Ω 0mV VΩHz ˚C uAmA 600V 00mV MAX 10A MAX 400mA 10sec FUSED 1000V DC...

  • Page 9: Dc Current (Dca)

    frequency under the circumstance of magnetic disturbance, such as 220V/50Hz-400Hz,380V/50Hz~400Hz 3. Connect the test lead to the tested circuit in parallel, the polarity of the red test lead and the tested voltage value will be displayed on LCD simultaneously Note: a) Do not measure the voltage higher than DC 000V or AC 750V. b) When measuring the high voltage, caution to avoid electric shock. Cut the connection between the test lead and tested circuit at once after measure- ment. Range Accuracy Resolution ±(0.8%+10d) 0mV 600V 00mV 750V ±(1.0%+10d) Input impedance: 10MΩ. Overload protection: 1000V DC or 750V AC peak value. Frequency response: 40-400Hz. Indication: average value response (RMS of sine wave). Duty Circle indication (0.1%-99.9%) DC Current (DCA) . Insert the black test lead to “COM” input terminal and the red test lead to “uAmA ”or “0A”, displayed as the right picture.

  • Page 10: Ac Current (Aca)

    Note: a) Do not measure the current higher than 0A at Range 0A and higher than 6000uA at uA Range and higher than 600mA at mA Range, otherwise the fuse will be burnt out or the instrument will be damaged. b) Do not connect the test lead to any circuit µA MT-1820 in parallel when the test lead is inserted in SELECT the current input terminal, otherwise it is Hz/DUTY HOLD RANGE SELECT AUTO POWER OFF MAX/MIN possible to damage the instrument or REL/RS232 µA Ω ˚C endanger the safety of the users. Cut VΩHz ˚C uAmA the connection between the test lead MAX 10A MAX 400mA 1000V DC 10sec FUSED 750V AC FUSED CAT ll and tested circuit at once after measurement.
  • Page 11 Range Accuracy Resolution 600uA 0.μA 6000uA μA ±(1.5%+10d) 60mA 0μA 600mA 00μA ±(2.0%+15d) 0mA MT-1820 MT-1820 SELECT SELECT Hz/DUTY HOLD RANGE Hz/DUTY HOLD RANGE SELECT SELECT AUTO POWER OFF AUTO POWER OFF MAX/MIN MAX/MIN REL/RS232 REL/RS232 ˚C...
  • Page 12 Note: a) When measuring the in-circuit resistance, Make sure all the power of the tested circuit has been turned off and all capacitors are fully discharged. b) It will cause the reading incorrect to input any voltage when measuring the resistance. If the voltage exceeds 250V, over-range protection voltage, it is possible to damage the instrument and endanger the safety of the users. c) At Range 600Ω, short-circuit the test lead to measure the wire resistance, and then subtract it from the real measurement. Range Accuracy Resolution MT-1820 600Ω ±(0.8%+5d) 0.1Ω RANGE 6kΩ 1Ω Hz/DUTY HOLD RANGE SELECT AUTO POWER OFF MAX/MIN REL/RS232 60kΩ...
  • Page 13 Open circuit voltage: 400mV. Over range protection: 250V AC/DC peak value. Diode and Continuity Test . Turn the function/range selection knob to “ ”Range, displayed as the right pictures. 2. Insert the red and black test lead separately to VΩHz and COM input terminal. Press “SELECT” button to choose the Buzzer and Diode mea- surement function. 3. Connect the RED test lead to the positive pole of the tested diode, BLACK test lead to the negative pole. 4. Read the present test result from LCD. (Note: no Bar Graph display at Diode Range) Note: a) If the diode is open circuit or the polarity is connected counter, “OL” will be displayed on LCD. b) When measuring the in-circuit diode, make sure all the power of the tested circuit has been turned off and all capacitors are fully discharged. c) Cut the connection between the test lead and tested circuit at once after measurement. Range Display Test Condition Diode Forward voltage Forward AC Current: .0mA, Counter drop Voltage: 3.0V...
  • Page 14 VΩHz and COM input terminal. 2. Connect the test lead to the tested capacitor in parallel, the tested capaci- tor value will be displayed on LCD. 3. If “OL” is displayed on LCD, it indicates the test capacitor value has exceeded the present range limit or the capacitor is short-circuit, please select the higher range to complete the measurement. 4. Read the present test result from LCD. MT-1820 MT-1820 SELECT SELECT Hz/DUTY HOLD RANGE SELECT RANGE SELECT Hz/DUTY HOLD AUTO POWER OFF MAX/MIN AUTO POWER OFF MAX/MIN REL/RS232 REL/RS232 Ω...

  • Page 15: Transistor Test

    VΩHz and COM input terminal. 2. Connect the test lead to the tested signal source in parallel, Read the present test result from LCD. (Note: no Bar Graph display at this range) 3. When measuring Frequency, press “Hz/DUTY” button once to get into the mode of DUTY measurement, and press “Hz/DUTY” button again to return to the mode of Frequency measurement. 4. When measuring AC current or voltage, press “Hz/DUTY” button to get into the mode of Frequency measurement, and press “Hz/DUTY” button again to get into the mode of Duty Circle measurement, and press the button third to return to the mode of AC current or voltage measurement. Note: a) Do not input the signal more than 60V. Otherwise it is possible to damage the instrument and endanger the safety of the users. b) Cut the connection between the test lead and c) tested circuit at once after measurement. 60Hz MT-1820 Range Accuracy Resolution 00Hz 0.0Hz Hz/DUTY Hz/DUTY HOLD RANGE SELECT AUTO POWER OFF MAX/MIN 000Hz REL/RS232 Ω...
  • Page 16 3. and “COM” input terminal, displayed as the picture.According to the model of the tested transistor, insert the accessory accordingly into the terminal of “EBC” of “NPN” or “PNP”. 4. Read the present test result from LCD. Note: a) Do not input the current or voltage at the input terminal of “uAmA ”, “COM” or transistor accessory, otherwise it is possible to damage the instrument or endanger the safety of the users. b) There are no Data Hold, MAX/MIN, Bar Graph function at Transistor Test mode. Range Scope of Display Test Condition HFE(NPNorPNP) 0-000 Base Current:mA VCE:2.V Temperature Test . Turn the function/range selection knob to MT-1820 SELECT Temperature Range. 2. Insert the two ends of the temperature sensor Hz/DUTY HOLD RANGE SELECT Into the “COM” and “uAmA” input terminal, the AUTO POWER OFF MAX/MIN REL/RS232 Ω ˚C positive end into the “uAmA” input terminal. VΩHz 3. Connect the sensor of the temperature cable ˚C uAmA...
  • Page 17 Note: a) Without the signal input, LCD automatically displays the normal tempera- ture. b) Do not replace the temperature sensor at will. Otherwise the accuracy can’t be assured. c) Do not input the voltage at Temperature Range, caution to avoid damag- ing the instrument. Range Accuracy Resolution MT-1820 SELECT -20˚C~400˚C ±(1.0%+50) 0.1˚C 400˚C~1000˚C ±(1.5%+15) 1˚C RANGE SELECT Hz/DUTY HOLD AUTO POWER OFF MAX/MIN REL/RS232 Ω ˚C 0˚F~750˚F ±(1.0%+50d) 1˚F 750˚F~1832˚F ±(1.5%+5d) VΩHz ˚C uAmA MAX 10A MAX 400mA...
  • Page 18 accessory of the instrument, and then can transmit the measuring data to PC, it is convenient to record, analyze, process and print the measuring results, etc. Please refer the details to the description in the software. • Instrument Maintenance This is a highly precise instrument, do not try to modify the inner circuit at will. . Keep the instrument dry, and keep it away form dust and shock. 2. Do not store and use the instrument in high humility, high temperature, combustible, explosive and strong magnetic places. 3. Clean the surface of the instrument with the damp cloth and gentle deter- gent, do not use the strong solvent like the abrasive cleaner and alcohol, etc. 4. Take out the batteries if do not use the instrument for a long time to pre- vent the batteries from leaking the liquid to corrode the instrument. 5. When LCD displays “ “ symbol, should replace the batteries as the following steps: 5-1. Loose the screw that fixes the batteries, and remove the battery case. 5-2. Remove the spent .5V batteries, and replace them by two same type new batteries. It is better to use alkaline batteries for lengthening the usage time. 5-3. Fit on the battery case and tighten the screw. 5-4. The steps of replacing the fuse are same as the above. When replacing the fuse, please use the same specification, same type of fuse. Note: . Do not input the voltage more than 000V DC/AC peak value.
  • Page 19 4. Please remove the test lead from the tested point and turn the power off before replacing the battery or fuse. The instruction manual is subject to chance without notice. The contents in the instruction manual are considered to be correct, if the us- ers find any errors or pretermission, etc., please contact the manufacturer. The manufacturer hereby will not be responsible for any accident and dam- age caused by the improper operation. The functions described in this instruction manual do not be the reason for special usage.
  • Page 20 目 錄 概述 開箱檢查 安全注意事項 安全符號說明 儀錶面板及按鍵功能說明 其他功能 特性 直流電壓(DCV) 交流電壓(ACV) 直流電流(DCA) 交流電流(ACA) 電阻 二極體及通斷測試 電容(C) 頻率(Hz) 三極管測量及溫度測量 溫度測量 通訊連接 儀錶保養...
  • Page 21 一．概述 MT-820一種性能穩定、高可靠性3 5/6數位萬用表，儀錶採用33mm字高 LCD顯示器，讀數清晰，顯示直觀，操作方便,可用來測量直流電壓、交流電 壓、直流電流、交流電流、電阻、電容、頻率、占空比、三極管、二極體及通 斷測試；同時還設計有6段類比棒條顯示、單位符號顯示、資料保持、相對 值測量，帶USB電腦介面,自動/手動量程轉換、自動斷電及報警功能。整機 採用了一個能直接驅動LCD的4位元微處理器和雙積分A/D轉換積體電路，一 個提供高分辨力、高精度的數位顯示驅動，該表功能齊全，測量準確度高，使 用方便，是實驗室、工廠、無線電愛好者及家庭的理想工具。 二、開箱檢查 打開包裝箱取出儀錶，仔細檢查以下附件是否缺少或損壞，如有缺少或損壞請 立即與經銷商聯繫。 •數字多用表 一台 •使用說明書 一本 •表筆 一副 •溫度探頭(K型熱電偶) 一隻 •PC介面電纜 一根 •軟體光碟 一張 •三極管附件 一個 •鱷魚夾 一套 •防震套 1個 •皮盒 1個 三、安全注意事項 MT-820符合IEC00條款（國際電工委員會頒佈的安全標準）。使用污染等 級2的安全要求進行設計和生產。 警 告: 為避免危險及使用者的安全,在使用儀錶之前請仔細閱讀本使用手冊,並嚴格遵 守安全警告資訊和操作說明來使用本儀錶。 .在測量30V以上電壓,測量0mA以上電流,測量帶電感負載的交流電力線;測...
  • Page 22 量電力波動期間的交流電力線時, 謹防電擊。 2.測量前，檢查測量功能開關是否置於正確的檔位,,要檢查表筆是否可靠接 觸，是否正確連接、是否絕緣良好等，以避免電擊。 3.儀錶只有和所配備的表筆一起使用才符合安全標準要求。如表筆線破損 時,必需更換上同樣型號或者相同電氣規格的表筆線。 4.不要使用其他未經確認或未認可的保險管來更換儀錶內部的保險管。只能 換上同樣型號或相同規格的保險管。更換前,表筆必需離開被測量點,確保輸 入端無任何信號。 5.不要使用其他未經確認或未認可的電池來更換儀錶內的電池。只能換上同 型號或相同電氣規格的電池。更換前,表筆必需離開被測量點,確保輸入端 無任何信號。 6.在進行電氣測量時,身體切勿直接接觸大地,不要接觸可能存在地電勢裸露的 金屬端子、輸出口、引線夾等。通常使用的乾燥的衣服、膠鞋、膠墊以及其 他絕緣材料,保持你的身體與大地絕緣。 7.不要在高溫、高濕、易燃、易爆和強磁場環境中存放及使用。 8.測量超過儀錶所允許的極限電壓值有可能損壞儀錶和危及操作人員的安全。 在儀錶面板上標有儀錶所允許測量的極限電壓值,切勿測量超過此標準的安 全,請勿輸入超過規定的極限值，以防電擊和損壞儀錶。 9.當表筆線插入電流插座時切勿測量任何電壓以免損壞儀錶和危及操作人員 的安全。 0.不要嘗試校準或維修儀錶。的確有需要時必須有專門培訓或認可的有資格 專業人員才能進行。 .在測量時功能/量程選擇開關必需置於正確的量程檔位,在轉換功能/量程選 擇開關時,請一定要先將表筆線與被測物件斷開,確保輸入端沒任何信號輸 入。嚴禁在測量進行中轉換功能/量程選擇開關。 2.當LCD顯示“ ”時,請及時更換電池以確保測量精度。 3.不允許表筆插在電流端子去測量電壓！ 4.請不要隨意改變儀錶線路，以免損壞儀錶和危及安全。 四、安全符號說明...
  • Page 23 警告! 直流 高壓!危險! 交流 大地 交直流 雙重絕緣 符合歐洲工會指令 電池欠壓 保險絲 五、儀錶面板及按鍵功能說明 . 儀錶型號 MT-1820 2. 6段類比棒條LCD屏顯示。 3. 功能按鍵：用於選擇各種測量功能。 3-. HOLD:讀數保持,按此鍵顯示值被鎖定, RANGE Hz/DUTY HOLD SELECT 再按此鍵鎖定狀態被解除. AUTO POWER OFF MAX/MIN REL/RS232 3-2. Hz/DUTY:頻率/占空比選擇鍵,在頻率 Ω ˚C 檔位元按此鍵可以在頻率和占空比之切換; VΩHz 在交流電壓或交流電流檔位按此鍵可以在 ˚C uAmA 電壓或電流/頻率/占空比之間切換 MAX 10A MAX 400mA FUSED...
  • Page 24 上消失，此時關閉RS232資料輸出，以此輪回。 4. 功能量程選擇開關，用於選擇各種測量功能和量程。 5. 0A電流輸入插孔：測量交直流電流0A檔的正輸入端，插入紅表筆。 6. uA/mA/˚C輸入孔：測量交直流微安、毫安培和溫度檔的正輸入端。 7. COM輸入孔：負輸入端，插入黑表筆。 輸入插孔：測量電壓、頻率/占空比、電阻、電容、二極體以及通斷 VΩHz 測試的正輸入端，插入紅表筆. 六、其他功能 . 自動斷電 當儀錶停止使用5分鐘後，儀錶便自動斷電（關機），然後進入睡眠（關 機）狀態，斷電前一分鐘內置蜂鳴器會發出5聲提示，一分鐘後長響一聲進 入休眠（關機）狀態，若要重新啟動電源（開機），請按任意鍵或撥動開 關撥盤，均可重新開機。 2. 按“REL/RS232”鍵，為相對值測量，常按“REL/RS232”鍵，大於兩 秒，顯示幕上有RS232顯示，此時為為儀錶與電腦連接狀態，利用隨儀錶 所附的USB電腦介面線連儀錶到電腦上，可以對所測量的資料進行記錄、 分析、處理和列印。詳細請參考軟體中的說明。 3. 資料輸出功能：安裝本機附帶的光碟內容，將儀錶通過USB電腦介面線與 電腦連接好，可將測量的資料傳輸到電腦，便於測量結果進行記錄、分 析、處理和列印等。詳細請參考軟體中的說明。 七、特性 一般特性 • 顯示方式：液晶顯示 • 最大顯示：5999、3 5/6位元自動極性顯示和單位顯示 • 測量方式：雙積分式A/D轉換 • 採樣速率：約每秒3次 • 過量程顯示：顯示“OL” •低電壓顯示：“ ”符號出現 •工作環境：0～40℃，相對濕度<80%...
  • Page 25 •儲存環境：-0～50℃，相對濕度<80% •電 源：兩節.5V電池（“AAA”電池） •體積（尺寸）：192mm×95mm×48mm（長×寬×高） •重 量：約390g（包括電池） 技術特性 •準確度：±（讀數的% + d數位），保證準確度環境溫度23±5℃，相對濕 度<75%， •校準保證期從出廠日起為一年。 八、直流電壓（ ） . 將功能/量程開關旋至交直流電壓，紅黑表筆 分別插入“VΩHz”和“COM”孔中,按 MT-1820 SELECT “SELECT”鍵選擇直流電壓，如圖所示。 2. 儀錶的起始狀態為自動量程直流電壓模式， Hz/DUTY HOLD RANGE SELECT AUTO POWER OFF MAX/MIN REL/RS232 顯示“AUTO”符號，按“ RANGE“鍵， Ω ˚C 轉換為手動量程方式。 VΩHz ˚C uAmA 3. 將測式表筆接觸測試點並聯到被測電路上， MAX 10A...
  • Page 26 750V交流峰值。 九、交流電壓(ACV) .將功能/量程開關旋至交直流電壓，按 “SELECT”選擇交流電壓，將紅黑 表筆分別插入“VΩHz”和“COM”。如下圖 2.儀錶的起始狀態為自動量程，顯示“AUTO”符號，按“RANGE“鍵， 轉換為手動量程方式。在自動或手動交流模式下按“Hz/DUTY”可測量頻 率/占空比測量，但此時頻響低，適用於磁場干擾環境下的高壓低頻測量， 如220V/50Hz-400Hz,380V/50Hz~400Hz。 3.將測式表筆接觸測試點並聯到被測電路上，紅色表筆線的極性和被測電壓值 將同時顯示在顯示幕幕上。 注 意： a) 不能測量高於DC000V或AC750V的電壓。 b) 在測量高壓時，要特別注意避免觸電。並在測試完後表筆與被測電路立即 斷開。 MT-1820 SELECT 量 程 準確度 分辨力 Hz/DUTY HOLD RANGE SELECT AUTO POWER OFF MAX/MIN REL/RS232 ±(0.8%+10d) 0mV ˚C Ω 600V 00mV VΩHz uAmA ˚C...
  • Page 27 3.如果顯示幕上顯示“OL”，表示被測量電流已超過當前量程，請選擇更高 的量程來測量。 注 意： a)在0A檔不能測量大於0A的電流，“uA”檔不能測量大於6000uA的電 流，“mA”檔不能測量大於600mA的電流，否則會將保險絲燒斷或損壞儀 錶。 b)當表筆插在電流輸入端時，嚴禁將表筆並聯在任何電路上，否則有可能損 壞儀錶和危及使用者安全，在完成所有得測量後，要立即斷開表筆與被測 電路。 µA MT-1820 MT-1820 MT-1820 SELECT SELECT SELECT Hz/DUTY HOLD RANGE SELECT RANGE RANGE SELECT Hz/DUTY HOLD SELECT Hz/DUTY HOLD AUTO POWER OFF MAX/MIN REL/RS232 AUTO POWER OFF AUTO POWER OFF...
  • Page 28 十一、交流電流（ACA） .將黑表筆插入“COM”孔中，紅表筆插入“uAmA ”或“0A”孔中，如 右圖所示。 2.將功能開關轉至電流檔，按“SELECT”鍵，選擇AC測量方式，然後將儀 錶串入被測回路中，被測電流值及紅表筆點的電流極性將同時顯示在螢幕 上 。 3.如果顯示幕上顯示“OL”，表示被測量電流已超過當前量程，請選擇更高 的量程來測量。 注 意： a) 在0A檔不能測量大於0A的電流， “mA”檔不能測量大於600mA的電 流。 b)當表筆插在電流輸入端時，嚴禁將表筆並聯在任何電路上，否則有可能損壞 儀錶和危及使用者安全，在完成所有得測量後，要立即斷開表筆與被測電 路。 µA MT-1820 MT-1820 MT-1820 SELECT SELECT SELECT Hz/DUTY HOLD RANGE Hz/DUTY HOLD RANGE SELECT SELECT Hz/DUTY HOLD RANGE SELECT AUTO POWER OFF...
  • Page 29 頻率回應： 40~00Hz。 占空比顯示：(0.1%-99.9%) 十二、電阻（Ω） .將功能/量程開關旋至“Ω”檔，將紅黑表筆分入“VΩHz”和“COM”。 2.將表筆的測試端並聯到被測量電阻上被測電阻將顯示在顯示幕上。 3.開機為預設為自動量程，按“RANGE”鍵選擇手動量程操作方式。 4.如果顯示幕上顯示“OL”表明已經超過當前量程，請選擇更高的的量程來 完成。 注 意： a) 測電阻時，必須先將被測電路內所有的電源關斷，並將所有的電容充分放 電。 b) 在測量電阻時，任何電壓的出現都會引起測量讀數不准，如果超過250V 保護電壓，則有可能損壞和危及使用者的安全。 c) 在使用600Ω量程時，應先將表筆短路，測得引線電阻，然後在實測中減 去。 MT-1820 量 程 準確度 分辨力 600Ω ±(0.8%+5d) 0.1Ω RANGE Hz/DUTY HOLD RANGE SELECT 6kΩ ±(0.8%+4d) 1Ω AUTO POWER OFF MAX/MIN REL/RS232 Ω Ω...
  • Page 30 2. 將紅、黑色表筆分別插入“VΩHz”和“COM”輸入 端，再按“SELECT”選擇蜂鳴器及二極體測量。 3.將紅色表筆接到二極體的正極，黑色表筆接到二極體的負極。 4.從顯示幕上讀出結果。(注：二極體檔無類比棒條顯示) 注 意： a) 如果二極體開路或極性接反時，顯示幕上將顯示“OL” b) 檢查二極體時，必須先將被測線路內所有的電源斷開，並將所有的電容充 分放電。 c) 在完成測量之後，要立即斷開表筆與被測電路的連接。 MT-1820 MT-1820 SELECT SELECT Hz/DUTY HOLD RANGE SELECT RANGE SELECT Hz/DUTY HOLD AUTO POWER OFF MAX/MIN AUTO POWER OFF MAX/MIN REL/RS232 REL/RS232 Ω ˚C Ω ˚C VΩHz VΩHz ˚C uAmA ˚C...
  • Page 31 十四、電容(C) .將功能開/量程開關旋到電容檔。將紅黑表筆線分別插 入“VΩHz”和“COM”輸入端。 2.將表筆線的測試端並聯到被測電容上，被測電容值將顯示在顯示幕上。 3.如果顯示幕上上顯“OL”，則表明被測電容值已超過當前量程或電容短 路，請選擇更高的量程檔測量。 4.從顯示幕上讀出當前的結果。 注 意： a) 在測電容時，必須先將被測線路內所有的電源斷開，並將所有的電容充分 放電。（注意：該檔無類比棒條顯示） b) 在測量大電容時，需要較長的時間，在00uF時約5秒。 C) 從完成所有的測量後，要立即斷開表筆與被測電路的連接。 量 程 準確度 分辨力 4.7µF MT-1820 40nF ±(5.0%+30d) 0pF REL/RS232 400nF 00pF Hz/DUTY HOLD RANGE SELECT AUTO POWER OFF MAX/MIN REL/RS232 4μF ±(3.5%+8d) Ω ˚C 40μF 0nF VΩHz...
  • Page 32 注 意： a) 不要輸入高於60V的信號，否則可能損壞儀錶並危及人身安全。 b) 在完成所有的測量後，要立即斷開表筆與被測電路。 量 程 準確度 分辨力 00Hz ±(0.5%+4d) 0.0Hz 60Hz MT-1820 000Hz Hz/DUTY 0kHz 0Hz RANGE SELECT Hz/DUTY HOLD AUTO POWER OFF MAX/MIN REL/RS232 00kHz 00Hz Ω ˚C MHz kHz VΩHz ˚C uAmA MAX 10A MAX 400mA 10sec...
  • Page 33 十七、溫度測量 1.將功能/量程選擇開關旋到溫度檔。 2.將溫度探頭的輸入端插入“COM”和“uAmA”孔中 ， 正端插 入“uAmA”中 3.將溫度探頭的感應端置於被測物件的表面上，如右圖的水中 4.從顯示幕上讀出當前測量結果。 5.按“SELECT”選擇華氏度，再按“SELECT”選擇攝氏度，以次迴圈。 注 意： a)當輸入端開路時，顯示常溫。 b)請勿隨便更換溫度感測器，否則將不能保證測量的準確度。 c)嚴禁在溫度檔輸入電壓,否則有損壞儀錶的危險！ MT-1820 MT-1820 SELECT SELECT Hz/DUTY HOLD RANGE Hz/DUTY HOLD RANGE SELECT SELECT AUTO POWER OFF AUTO POWER OFF MAX/MIN MAX/MIN REL/RS232 REL/RS232 Ω ˚C Ω ˚C VΩHz...
  • Page 34 詳細請參考軟體中的說明。 十九、儀錶保養 該儀錶是一台精密儀器，使用者不要隨意更改電路。 .請注意防水，防塵、防摔。 2.不宜在高溫高濕、易燃易爆和強磁場的環境下存放、使用儀錶； 3.請使用濕布和溫和的清潔劑清潔儀錶外表，不要使用研磨劑及酒精等烈性 溶劑。 4.如果長時間不使用，應取出電池，防止電池漏液腐蝕儀錶； 5.注意電池使用情況，當LCD顯示出“ ”符號閃爍時，應更換電池； 步驟如下： 5-.取出後蓋上固定電池的螺絲，退出電池門； 5-2.取下.5V電池，換上兩個新的電池，雖然任何標準.5V電池都可使用，但 為加長使用時間，最好使用鹼性電池； 5-3.裝上電池門，上緊螺絲； 5-4.保險絲更換：步驟同上。更換保險絲時，請使用規格、型號相同的保險 絲。 注 意： .不要將高於000V直流或交流峰值電壓接入； 2.不要在電流檔、電阻檔、二極體檔和蜂鳴器檔上，去測量電壓值； 3.在電池沒有裝好或後蓋沒有上緊時，請不要使用此表； 4.在更換電池或保險絲前，請將測試表筆從測試點移開，並關機。 本說明書如有改變，恕不另行通知 本說明書的內容被認為是正確的，若用戶發現有錯誤、遺漏等，請與生產廠 家聯繫。 本公司不承擔由於用戶錯誤操作所引起的事故和危害。 本說明書所講述的功能，不作為將產品用做特殊用途的理由。...
  • Page 35 NOTE...
  • Page 36 寶工實業股份有限公司 PROKIT’S INDUSTRIES CO., LTD. http://www.prokits.com.tw E-mail : pk@mail.prokits.com.tw...