Owner's manual

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MT-1233C/MT-1233D

3-1/2 Digital Multimeter

User’s Manual

Edition

2013

Summary of content (28 pages)

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INTRODUCTION Warning To avoid electric shock or personal injury, read "Safety Information" and is Warning and Precautions" before using the Meter Safety information  This series meter Comply with IEC 1010-1 CAT I 600V / CAT II 300V overvoltage standards. See specifications  Use the Meter only as specified in this manual, otherwise the protection provided by the Meter may be impaired.  In this manual a Warming identifies conditions and actions that pose hazards to the user.
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Table 1. International Electrical Symbols AC (Alternating Current) DC (Direct Current) AC or DC Battery Safety information* Refer to the manual Earth ground Fuse Conforms to European Union directive Double insulated WARNING AND PRECAUTIONS To avoid possible electric shock or personal injury, and to avoid possible damage to the meter or to the equipment under test, comply with the following practices:  Do not use the meter if it is damaged. Before you use the meter, inspect the case.
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 Do not use the meter if it operates abnormally. Protection may be impaired. When in doubt, have the meter serviced.  Do not operate the meter around explosive gas, vapor, or dust.  Do not apply more than the rated voltage, as marked on the meter between terminals or between any terminal and earth ground.  Before use, verify the meter's operation by measuring a known voltage.  When measuring current, turn off circuit power before connecting the meter in the circuit.
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with the battery door or portions of the cover removed or loosened.  To avoid false readings, which could lead to possible  Safety Compliance: IEC 61010-1, 2000 CAT I 600V overvoltage standards Do not measure voltages above 500V in Category installations Overvoltage installations categories per IEC 61010-1, 2000: The meter is designed to protect against transients in these categories: CAT I From high-voltage low-energy sources, e.g.
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 Storage temperature: -10℃～50℃, 0-75% RH.  Power: Single standard 1.5V battery AAAx2  Dimensions: 130L*72W*28H mm  Weight approx: 130g (not including battery) FRONT PANEL DESCRIPTION 1. LCD Display 2. DATA HOLD button 3. BACK LIGHT button 4. FUNCTION AND RANGE SWITCH This switch is used to select the function and desired range as well as to turn on the instrument. To extend the life of this battery, the switch should be in the "OFF" position when the instrument is not in use. 5. “VΩmA" JACK 6.
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DC VOLTAGE Range Resolution 200mV 100uV Accuracy 2000mV 1mV ±0.8%+3d 20V 10mV 200V 100mV 500V 1V ±(1.0%+3d) OVERLOAD PROTECTION: 220V rms AC for 200mV range and 500V DC or 500V rms for all ranges. AC VOLTAGE Range Resolution 200V 100mV Accuracy ±1.2%+5d 500V 1V RESPONSE: Average responding, calibrated in rms of a sine wave. FREQUENCY RANGE: 40Hz ～400Hz OVERLOAD PROTECTION: 500V DC or 500V rms for all ranges.
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DC CURRENT Range Resolution Accuracy 2000uA 1 uA ±(1.2%+5d) 20mA 10 uA 200mA 100 uA 10A 10mA ±(2.5%+5d) OVERLOAD PROTECTION: 200mA 250V fuse (10A range unused). MEASURING VOLTAGE DROP: 200mV AUDIBLE CONTINUITY RANGE DESCRIPTION Built-in buzzer sounds if resistance is less then 30±20Ω OVERLOAD PROTECTION: 5 second maximum 220V rms.
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RESISTANCE Range Resolution 200Ω 0.1Ω 2000Ω 1Ω 20kΩ 10Ω 200kΩ 100Ω 20MΩ 10KΩ 200MΩ 100KΩ MT-1233C MT-1233D ±(1.5%+5d) ±(1.0%+3d) ±(1.0%+5d) ±[1.0%(rdg -l0)+10d] MAXIMUM OPEN CIRCUIT VOLTAGE: 2.3V. OVERLOAD PROTECTION: 5 seconds maximum 220Vrms. WARNING: DO NOT input any voltage at resistance range for safety! - TEMPERATURE (MT-1233C only) RANGE RESOLUTION -40℃~150℃ 1℃ 150℃~1000℃ ACCURACY ±(1.0%+3d) ±(1.5%+15d) -40℉~302℉ ±(1.0%+4d) 1℉ 302℉~1832℉ ±(1.
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OPERATING INSTRUCTIONS WARNING  To avoid electrical shock hazard and/or damage of the Instrument, do not measure voltages that might exceed 600V above earth ground.  Before the use of instrument, inspect test leads, connectors and probes for cracks, breaks, cracks in the insulation.  Dangerous voltages may be present at the input terminals and may not be displayed.
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DC CURRENT MEASUREMENT 1. Red lead lo "VΩmA". Black lead to "COM”(for measurements between 200mA and 10A connect red lead to "10A” jack with fully depressed.) 2. RANGE switch to desired DCA position. 3. Open the circuit to be measured and connected test leads INSERIES with the load in with current is to measure. 4. Read current value on Digital Display. 5. Additionally,"10A"function is designed for intermittent use only.
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3. Connect the red test lead to the anode! of the diode to be measured and black test lead to cathode. 4. The forward voltage drop in mV will be displayed. If the diode is reversed, figure "1" will be shown. TEMPERATURE MEASUREMENT (MT-1233C only) 1. Connect the K type thermoelectric couple to "VΩmA" and "COM" jacks. 2. RANGE switch to TEMP position. 3. The display will read Temperature value ℃ AUDIBLE CONTINUITY TEST 1. Red lead to "VΩmA", Black lead to "COM". 2. RANGE switch to “ ”position. 3.
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MAINTENANCE Beyond replacing batteries and fuses, do not attempt to repair or service your Meter unless you are qualified to do so and have the relevant calibration, performance test and service instruments. The recommended calibration cycle is 12 months. To clean the terminals a) Push the Meter OFF and remove test leads. b) Shake out any dirt that may be in the terminals.
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If the display shows any other value, have the meter serviced. See "Service and Parts" later in this manual. BATTERY AND FUSE REPLACEMENT 1) Battery and fuse replacement should only be done after the test leads have been disconnected and power is off. 2) Loosen screws with suitable screwdriver and remove case bottom. 3) The meter is powered by 1.5V battery (AAAx2). Snap the battery connector leads to the terminals of a new battery and reinsert the battery into the case top.
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SERVICE AND PARTS If the Meter fails, check the batteries and fuses first, and then review this manual to make sure that you are operating the Meter correctly 15
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一、概述 MT-1233C/D 儀錶是—種功能齊全，性能穩定，結構新穎，安全可靠的小型掌上型 3 1/2 位元數位萬用表，可用於測量交直流電壓、直流電流、電阻、二極體正向壓降，有些還可以測量溫度和線路通斷，是廣大用戶隨身攜帶的理想維修工具。本使用說明書包括有關的安全資訊和警告提示等，請仔細閱讀有關內容，並嚴格遵守所有的警告和注意事項。二、裝箱部件 1．使用說明書 2．測試錶棒 3．溫度探頭（僅限於 MT-1233C） 1本 1副 1個三、安全操作準則請注意“警告標識及警告字句＂。警告表示對使用者構成危險。對儀錶或被測設備可能造成損壞的情況或行動。MT-1233C/D 系列儀錶嚴格遵循電子測量儀器安全要求以及安全標準 IEC61010 進行設計和生產，符合雙重絕緣、過電壓標準(CAT I 600V、CAT II 300V)和污染等級 2 的安全標準。請遵循手冊的使用說明使用儀錶，否則儀錶所提供的保護功能可能會削弱或失去。 16
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1．使用前應檢查錶棒絕緣層應完好，無破損及斷線。如發現錶棒線或儀錶殼體的絕緣已明顯損壞，或者您認為儀錶已無法正常工作，請勿再使用儀錶。 2．在使用錶棒時，必須始終確保您的手指放在錶棒手指保護環之後。 3．不要在儀錶終端及按地之間施加 500V 以上的電壓，以防電擊和損壞儀錶。 4．被測電壓高於直流 60V 和交流 42V rms 的場合，應小心謹慎，防止電擊危險。 5．儀錶後蓋沒有蓋好前，嚴禁使用儀錶，否則有電擊的危險。 6．被測信號不允許超過規定的極限值，以防電擊和損壞儀錶。 7．嚴禁量程開關在測量中改變檔位，以防損壞儀錶。 8．不允許使用 10A 測試端子或用電流檔去測量電壓。 9．必須用同類標稱規格快速熔斷保險絲更換已損壞的保險絲，確保安全。 10．請勿隨意改變儀錶內部接線，以免損壞儀錶和危及安全。 11．當液晶顯示器顯示“ ＂符號時，應及時更換電池，以確保測量準確度。 12．不要在高溫，高濕和強電磁場環境中使用儀錶，尤其不要在潮濕環境中存放儀錶，受潮後的儀錶，其性能可能變差。 17
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13．維護保養請使用濕布和溫和的清潔劑清潔儀錶外殼，不要使用研磨劑或溶劑。四、電氣符號電量不足 AC (交流）雙重絕緣 AC 或 DC 五、            警告接地 DC (直流) 保險絲蜂鳴器二極體綜合指標電壓輸入端子和地之間的最高電壓：500Vrms 10A 端子：無保險絲 mA 端子：F200mA/250V 保險絲量程選擇：手動背光功能：手動點亮，延時熄滅最大顯示：1999，每秒約更新 3 次極性顯示；自動顯示，負極性顯示“-＂符號過量程顯示：“1＂資料保持功能：液晶顯示幕顯示“H＂符號＂符號電池電量不足：液晶屏顯示“ 儀錶內使用電池：l.
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 工作溫度：0℃~40℃ （32℉~104℉）儲存溫度：-10℃~50℃C （14℉~122℉）  外形尺寸：約為 130L*72W*28/H 毫米  重量：約重 130 克（不包括電池）六、外表結構 1．液晶顯示屏 2．數據保持開關 3．背光按鍵開關 4．量程旋鈕 5．電壓,電流,電阻, 溫度測量輸入端 6．10A 電流輸入端 7．公共輸入端七、按鍵功能 1．資料保持顯示：按下“HOLD＂鍵，儀錶液晶顯示幕上保持顯示當前測量值，再次按鍵則取消此功能。 2．背光控制：按下背光按鍵即可點亮液晶屏的背光燈，點亮後約延時 10 秒左右即熄滅。 19
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八、測量操作說明 1．直流電壓及交流電壓測量 a)將紅錶棒插入“VΩmA＂，黑錶棒插入“COM＂插孔。 b)將功能量程開關置於直流電壓檔位，並將錶棒並聯到待測電源或負載上。 c)從液晶顯示幕讀取測量結果。注意：不要測量高於 500V 的電壓，雖然有可能讀得讀數，但也可能會損壞內部電路及傷害到您。在測量之前如不知被測量電壓值的範圍時，應將最程開關置於最高量程檔，根據讀數需要逐步調低測量量程。當液晶顯示幕只在高位顯示“1＂時，說明已超量程，須調高最程。在每一個量程檔，儀錶的輸入阻抗均為 10MΩ，這種負載效應在測量高阻電路時會引起測量誤差，如果被測電路阻抗≤10KΩ，誤差可以忽略（0.
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3．電阻測量 a)將紅錶棒插入“VΩmA＂插孔，黑錶棒捅入 “COM＂插孔。 b)將功能量程開關置於電阻測量檔位，並將錶棒並聯到待測電阻上。 c)從顯示器上讀取測量結果。注意：檢測線上電阻時，為了避免儀錶受損，須確認被測電路已關掉電源，同時電容已放完電，方能進行測量。在 200Ω 檔測量時，測試錶棒引線會帶來 0.
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該是 0.
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九、技術指標準確度：±（a%讀數+字數），保證期為 1 年環境溫度為：23℃±5℃，相當濕度＜75% 1．直流電壓量程分辨力 MT-1233C MT-1233D 200mV 100uV 2000mV 1mV ±（0.8%+3d） 20V 10mV 200V 100mV 500V 1V ±（1.0%+3d）輸入阻抗：所有量程為 10MΩ 超載保護：對於 200mV 量程為 250V 直流或交流，其餘量程為 500V 直流或交流。 2．交流電壓量程分辨力 MT-1233C MT-1233D 200V 100mV ±（1.
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3．直流電流量程分辨力 MT-1233C MT-1233D 2000uA 1uA ±(1.2%+5d) 20mA 10uA 200mA 100uA 10A 10mA ±(2.5%+5d) 超載保護：F200mA/250v 保險絲 10A 量程無保險絲，測量時間要求≤10 秒，間隔時間 ≥I5 分鐘。 4．電阻量程 200Ω 2000Ω 20 KΩ 200KΩ 20MΩ 分辨力 0.1Ω 1Ω 10Ω 100Ω 10KΩ 200MΩ 100KΩ MT-1233C MT-1233D ±(1.5%+5d) ±(1.0%+3d) - ±(1.0%+5d) ±[1.0%（讀數 -10d）+10d] 最大開路電壓︰2.
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5．溫度（僅 MT-1233C）量程分辨力準確度 -40℃~150℃ ±(1.0%+3d) 1℃ 150℃~1000℃ ±(1.5%+15d) -40℉~302℉ ±(1.0%+4d) 1℉ 302℉~1832℉ ±(1.
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十、更換電池＂符號，表示電池需要如果液晶顯示幕上出現“ 更換，請按以下步驟操作： 1．錶棒離開被測電路，從輸入插孔中拿掉錶棒，並將儀錶上的旋鈕開關撥到“OFF＂檔位以關閉儀錶電源 2．用螺絲刀擰開背面電池門的螺絲，將其移走 3．取出舊電池，更換新的電池（AAA 1.
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十二、故障排除如果您的儀錶不能正常工作，下面的方法可以幫助您快速解決一般問題。如果故障仍排除不了，請與維修中心或經銷商聯繫。故障現象檢查部位及方法沒顯示電源未接通換電池換保險絲符號出現換電池顯示誤差大換電池  本說明書如有改變，恕不通知；  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。 27
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