User Manual

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MT-2017

Protective Function Analog Multimeter

User’s Manual

Edition

2013

Summary of content (24 pages)

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INTRODUCTION This Multi-meter is an accurate, safe, battery operated, rear tilt-stand, easy to operate handheld instrument with robust protective holster alongside and the adjustable back tilt device with hook-up design.
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Test Functions DC V Range Accuracy 0-0.1-2.5-10-50250 V-1000V  3% FSD.  4% FSD. For 1000V Input Impendence: 20KΩ/V Overload Protection: Max. 1000V AC/DC BUT 0.1V/2.5V/10V 250V Max. Null DCV ±-5V, ±25V  5% FSD. Input Impedance: 40KΩ/V Overload 1000V Max. AC V 0-10-50-250V -1000V  4% FSD.  5% FSD. For 1000V DC mA 0-0.05-2.5-25-25 0 mA, 10A  3% FSD.  4% FSD. For 10A Ω X 1: 0.
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0.025-0.25-25uF (C2)  3% FSD. 2000uF(C1) Approx. Value BATT Check 0 ~ 1.5V: GOOD - ? – BAD 0 ~ 9V: GOOD - ? – BAD  5% of ARC of Scale Length Transistor Check hFE: 0-1000 via special hFE socket via special hFE socket Approx. Value Approx. Value At Ω X 10 Range -22 dB ~ + 62 dB (0dB=1mW at 600Ω) Beeper sounding under 200 Ohm Approx.
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scale. (-) Jack: Plug-in connector at the lower left on the panel for Black, negative test lead. (+) Jack: Plug-in connector at the lower right on the panel for Red, positive test lead. OPERATING INSTRUCTIONS CAUTION When making voltage or current measurements, develop the habit of turning off all power to the circuit under test. Connect the test leads at the desired points in the circuit, and then turn on the power while taking readings.
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PCB. If it’s blown, replace it. (See fuse replacement.) 6. Avoid placing the meter where extreme shock or continuous vibration is encountered and do not store in excessively hot or damp places. Although very rugged, the meter is a sensitive measuring device and should be handled carefully & properly. 7. Do not check resistance, transistor, diode, LED, or capacitance when live voltage or current input across the circuit. 8.
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OPERATION PROCEDURES DC Voltage Measurement WARNING: WITH EXTREME CARE WHEN MAKING MEASUREMENTS FOR HUGE VOLTAGE. DO NOT TOUCH TERMINAL OR PROBE ENDS. 1. Set the selector switch to the appropriate DCV range to be used. 2. Connect the BLACK test lead to the “-COM” jack and the RED test lead to the “+” jack. 3. If you know the polarity of the circuit to be tested, connect the black probe to the negative side. 4.
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AC Voltage Measurement WARNING: WITH EXTREME CARE WHEN MAKING MEASUREMENTS FOR HUGE VOLTAGE. DO NOT TOUCH TERMINAL OR PROBE ENDS. 1. Set the selector switch to the appropriate ACV range to be used and connect the test leads across the circuit or load under measurement. (Polarity of the test probes is unimportant on ACV test.) 2. Connect the BLACK test lead to the “-COM” jack and the RED test lead to the“+” jack. 3. Check the needle position and the get the reading on V.A scale.
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The Maximum terminal voltage drop is 250mV except for the 10A range. Note: If connected incorrectly with the voltage at these ranges, quickly remove the test leads from the circuit as to avoid damage to this tester. (This tester can afford the voltage <250V DC/AC rms. for the period of 5 seconds max.) Resistance Measurement WARNING: DO NOT APPLY VOLTAGE TO MEASURING TERMINAL WHILE RANGE SWITCH IS IN OHM POSITION. 1. Set the selector switch to the appropriate Ω range to be used. 2.
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Diode Measurement 1. Set the selector switch to the appropriate Ω range to be used. NOTE: To test the diode while current below 0.060 mA at X 10K range; current below 0.15 mA at X 1K range; current below 1.5 mA at X 100 range; current below 15 mA at X 10 range; current below 150 mA at X 1 range. 2. For IF (forward current) test, put the BLACK test lead to the “-COM” jack and the RED test lead to the Red “+” jack.
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Transistor hFE and LED Test 1. Set the selector switch to the R X 10 range. FOR Measuring Transistor hFE 2. Take note the type of transistor “PNP” or “NPN” and then insert the transistor terminals of the Emitter, Base and Collector separately into the proper holes of the socket on the front panel. 3. Read the approximate hFE Value directly at the hFE scale. Note: Current 10μA. VCE 2.8V. 4. When the Base terminal cut, the value of Leak is Iceo for Transistor.
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Decibels Measurement 1. Set the selector switch to AC 10V range. 2. Connect the BLACK test lead to the “-COM” jack and the RED test lead to the Red “+” jack. 3. Connect the test leads to the measuring circuit specially in series with a 0.047μF/400V Metalized Polyester Capacitor. And then read the bottom Red dB scale. 4. For more dB scope, change the selector switch to the others of ACV ranges and make the same actions. Add the appropriate number of dB scale reading as noted on the chart below.
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1. For Measuring the Capacitor over 25uF: 1) 2) 3) 4) 2. Set the selector switch to the R X 1K range. Connect the BLACK test lead to the “-COM” jack and the RED test lead to the Red “+” jack. Connect the test leads to the capacitor to be measured (Note the polarity of capacitor). Watch the needle deflection to the right topside, and read the Red C1 scale on the Dial. For Measuring the little Capacitor less than 25uF: 1) 2) 3) 4) 5) 6) 7) Set the selector switch to the DC 50uA(C2) range.
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Troubleshooting Nevertheless, problems or malfunctions may occur. For this reason, the following is a description of how you can eliminate possible malfunctions yourself: Error Possible cause The multimeter does not work. Are the batteries exhausted? Is the power indicator lit? Check the state of the batteries and the fuse 0.5A. No measurements possible via V/mA socket. No measurements possible via 10A socket. No change in measured values. Faulty measuring results are displayed.
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MAINTENANCE Replacement for Battery and/or Fuse should only be done after the test leads have been disconnected and POWER OFF. 1. Battery Replacement 1). Note the condition of the batteries using the procedure described above, if the battery needs to be replaced, remove the screw and open the upper cover of the battery cabinet on the rear case. 2). Take off the spent batteries and replace them with a battery of the same type.
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MT-2017 26 檔指針型防誤測三用電錶操作使用說明書特點：本機是指針式，防誤測全保護，斜立型三用電錶(附晶體 LED 座，短路蜂鳴及 10A 檔)。具有以下基本特點和參數如下： - 斜立型，可調後蓋支撐架（拉出後,向上轉動 90 度, 壓下可固定）；附帶掛鈎設計（支撐架向上轉動 180 度伸出後蓋，以便懸掛）。 - 配置玻璃釺維環氧樹脂鍍金盤雙面電路板，日系電池，並通過 CE 認證。 - 檔位切換簧片採用彈簧寶石軸承及二極體雙向限幅電路 - 具有全面的防誤測超載保護電路及速斷型保險絲多重保護 - 具有緊湊的兩側軟性防滑減振保護套 - 可測直流電壓和中間零位正負直流電壓，直流電流（最大 10A），交流電壓，電阻，電晶體，二極體，LED，電池，短路蜂鳴, 和電容(2000uF Max.) 等. - 輸入阻抗：DC20Kohm /V，AC 9Kohm/V - 直流電壓：0.1/2.5/10/50/250/1000V 六檔 - 中間零位正負直流電壓：±5V/25V 兩檔 - 直流電流：50μA/2.
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規格表：測試功能檔位準確度說明直流電壓 DCV 0-0.1-2.5-10-50-250-1 ±3%FSD(滿刻度) 000V ±4%FSD(1000V 檔) 輸入阻抗：20KΩ/V 超載：Max 1000V 但在 0.1V/2.5V/10V 各檔，250V Max. 正負直流電壓 Null DCV DC ±5V/±25V 輸入阻抗：40KΩ/V; 超載：Max.250V ±5% FSD.(滿刻度) 輸入阻抗：9KΩ/V ±4%FSD(滿刻度) 超載：Max.1000V 0-10-50-250V-1000V ±5%FSD(1000V 檔) 但 10V/50V 檔，250V 頻率範圍：40~10KHz Max. 壓降：250mV 超載保護：0.5A/250V 直流電流 0-0.05-2.5-25-250mA, ±3%FSD(滿刻度) 保險絲管；在 10A DCA 10A ±4%FSD(10A 檔 ) 檔，超載保護： F10A/250V, 大電流測試時間最多 1 分鐘。 X1:0.
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超載：最高 AC/DV250V，最低 DC/AC 50V，超載最大測試時間 5 秒。三極管檢測 LED, Diode Check hFE: 0-1000 Continuity Check 200 歐姆左右以內，蜂鳴器會響。內部電源 1.5V5 號電池：2 節， 6F22.9V 矩形電池：1 節參考值使用 Ω×10 檔參考值使用 Ω×10 檔超載：最高 AC/DC 250V，最低 DC/AC 50V 超載最大測試時間 5 秒。指針防誤測斜立型三用電錶指針閱讀參考表測試 Test 量程檔位 Range Position ×1 ×10 電阻(歐姆) ×100 Resistance(Ω) ×1K ×10K DC 0.1V 2.
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Null DC Volt(V) 直流電流 (安培) DC Current（A）交流電壓 (伏特) AC Volt(V) hFE 二極體 Diode DC 50μA 2.5mA 25mA 250mA 10A AC 10V 50V 250V 1000V Ω×10 Ω×10K ×1K ×100 ×10 ×1 50 250 250 250 10 10V 50 250 10 IC/IB ×1 ×0.01 ×0.1 ×1 ×1 ×1 ×1 ×1 ×100 ×1 μA×1 μA×10 μA×100 mA×1 mA×10 測量注意事項： 1. 指針調零調整零位調整器，使指針和左側的零位對齊，不必每次測量前都調，但是在開始測量之前，指標都必須確認指標在零位上。 2. 測試棒的連接紅色棒插“+”插孔，黑色棒插入“-COM”插孔。 3. 電錶內部電池檢查將表棒按以上規定方式接入好，再將檔位旋鈕轉到 Rx10 檔位。然後，將表棒的兩端短路連接。這時，檢查指針是否正常回歸零位。若不能，則電池電力不足，應要更換新電池。 4.
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用於測量電池、放大器電路、通訊設備電源、電子管和電晶體電路偏壓的直流電壓。6 個檔位元中的每一個檔位元標記，分別表示該檔的最大電壓示值。 (※不確定之直流電壓，應從最大值依序向下調整量測) 2. 中值零位正負直流電壓：（不可測量任何交流電壓！）本功能專用檢測電子電路的正負電平。通過表棒接入電路，可直接查看刻度讀數。注意：在此檔位時，可用歐姆電調零將指針設置在中間位置。若無法調到中值零位，則有可能是 9V 電池電量不足。請檢查電池。 3. 交流電壓：用於測量商業交流電壓、交流電源電路、交流放大信號級等。4 個檔位元中的每一個檔位元標記，分別表示該檔的最大電壓示值.(※不確定之交流電壓，應從最大值依序向下調整量測) 4. 直流電流：（不可測量任何交流電流或電壓！）用於測量直流電源控制裝置的電流消耗、電晶體電路的工作電流等。5 個檔位元中的每一個檔位元標記，分別表示該檔的最大電流示值。 (※不確定之直流電流，應從最大值依序向下調整量測) 注意：本機具有防誤測保護電路。可短時（5 秒內）承受低於 AC/DC 250V 的電壓衝擊，僅爆保險絲。 5.
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將量程選擇旋鈕置於 Buzz 檔，當被測電路<200ohm, 蜂鳴器鳴叫。注意：本機在檔位元具有防誤測保護電路。可短時（5 秒內）承受低於 AC/DC 250V 的電壓衝擊，僅爆保險絲。 7. 電池測試：（※電池能用於小的晶體管收音機，但不能用作裝的電源。）好電池：指針停留在綠色(GOOD)範圍內。電量不足：指針停在 “？”尚可使用範圍內。壞電池：指標停在紅色(BAD)區域。注意：本機在檔位元具有防誤測保護電路。可短時（5 秒內）承受低於 AC/DC 250V 的電壓衝擊，僅爆保險絲。 8. dB 測試：本機測量 dB 值時，要接入表棒並串接一個 0.047μF/400V 電解電容，然後檢視電錶讀數。測量在 10V 檔上進行，可直接讀取 dB 刻度(-10dB~+22dB)。測量在 50V 檔上進行時，刻度讀值要加 14dB，才是實際 dB 值。測量在 250V 檔上進行時，刻度讀值要加 28dB。測量在 1000V 檔上進行時，刻度讀值要加 40dB。例如，在 1000V 檔上最大可測 dB 值是 22+40=62dB。 9.
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10. 二極體測試： (1) 將量程選擇旋鈕置於“Ω”檔上有選擇的量程位置，X10K 用於 0~60μ A 測試，X1K 用於 0~150μ A，X100 用於 0~1.5m A，X10 於 0~15mA，X1 用於 0~150mA 測試。 (2) 將電錶與二極體連接測 IF(正向電流)，將電錶的“COM”端與二極體陽極相連，“+”端與二極體陰極相連，對於 IR(反向電流)測試連接方法和 IF 相反。 (3) 在 LI 刻度線讀出 IF 或 IR (4) 在測試 IF 或 IR 同時在 LV 刻度上，讀出二極體正向(反向) 電壓。 11. 電容測試：注意：檢測前，須將電容放電並將電錶調零。(※此功能不能測試帶電壓電路) (1) 大電容（25uF 以上）檢測： a.將電錶量程選擇旋鈕置於“Ωx1k”檔 b.用表棒連接電容，並注意“+”，“-”極性。 c.觀察指標偏轉最大時，電錶刻度板上紅色 C1 刻度。 (2) 小電容（25uF 以下）檢測：須搭配選購 MT-2007-C 電容測試器使用。（請在測試前，閱讀 MT-2007-C 使用說明） a. 將電錶量程選擇旋鈕置於“DC50uA(C2)”檔 b.
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電容量程 0.025uF 0.25uF 25uF 換算倍數 X 0.0001 X 0.001 X 0.1 g. 測試完後，須將電源開關關掉。日常保養維修更換電錶內部電池和保險絲管時，必須將表棒從電錶上移調，並切斷電源。 1). 電池更換：打開電錶的上部電池倉後蓋，從電池座中拿出不好的電池。再將新的同規格電池放入原位，並注意電池的正負極性，然後，蓋上後蓋並擰緊螺釘。 2). 保險絲管更換：首先移去電錶兩側的軟性保護套，然後打開電錶的後蓋，從保險絲座中拿出不好的保險絲管。再將新保險絲管（0.