数字万用表使用方法.pdf
数字万用表使用说明书
manual before starting using the instrument. • Save and keep the manual handy to enable quick
(4 ranges) Terminal Voltage:
# CAUTION is reserved for conditions and actions that can cause injury or instrument damage.
# DANGER • Never make measurement on a circuit in which the
# DANGER is reserved for conditions and actions that are likely to cause serious or fatal injury.
# WARNING is reserved for conditions and actions that can cause serious or fatal injury.
The symbol # indicated on the instrument means that the user must refer to related parts in the manual for safe operation of the instrument. Be sure to carefully read the instructions following each symbol in the manual.
4. SPECIFICATIONS
106 107 数字万用表用户手册说明书
June 2013, Rev. 1, 10/15 © 2013-2015 Fluke Corporation. All rights reserved. Specifications are subject to change without notice. All product names are trademarks of their respective companies.106/107 Digital MultimetersTable of ContentsTitle Page Introduction (1)How to Contact Fluke (1)Safety Information (2)Instrument Overview (8)Terminals (8)Display (9)Auto Power Off (10)Auto Backlight Off (11)Measurements (11)Data Hold (11)Measure AC and DC Voltage (12)Measure AC or DC Current (14)Measure Resistance (16)Test for Continuity (16)Test Diodes (107 Only) (18)i106/107 Users ManualiiMeasure Capacitance (19)Measure Frequency and Duty Cycle (107 Only) (19)Maintenance (20)General Maintenance (21)Test the Fuse (22)Replace Batteries and the Fuse (22)Service and Parts (24)General Specifications (25)Accuracy Specifications (28)Digital Multimeters Safety Information3WarningTo prevent possible electrical shock, fire, or personal injury:• Carefully read all instructions.• Read all safety information before you use the Product. • Use the Product only as specified, or the protection supplied by the Product can be compromised.• Do not use the Product around explosive gas, vapor, or in damp or wet environments.• Do not use the Product if it is damaged.• Disable the Product if it is damaged.• Do not use the Product if it operates incorrectly.• Examine the case before you use the Product. Look for cracks or missing plastic. Carefully look at the insulation around the terminals.• Use only correct measurement category (CAT), voltage, and amperage rated probes, test leads, and adapters for the measurement.• Measure a known voltage first to make sure that the Product operates correctly.106/107 Users Manual4 •Do not use test leads if they are damaged. Examine the test leads for damaged insulation and measure a known voltage.•Do not apply more than the rated voltage, between the terminals or between each terminal and earth ground.•Do not use the HOLD function to measure unknown potentials. When HOLD is turned on, the display does not change when a different potential is measured. •Do not touch voltages >30 V ac rms, 42 V ac peak, or 60 V dc.•Keep fingers behind the finger guards on the probes.•Remove all probes, test leads, and accessories before the battery door is opened.•Do not exceed the Measurement Category (CAT) rating of the lowest rated individual component of a Product, probe, or accessory.•Remove the input signals before you clean the Product.•Have an approved technician repair the Product.•Remove the batteries if the Product is not used for an extended period of time, or if stored in temperatures above 50 °C. If the batteries are not removed,battery leakage can damage the Product.Digital Multimeters Safety Information 5• Replace the batteries when the low battery indicator shows to prevent incorrect measurements.• Use only specified replacement parts.• Use only specified replacement fuses.• Limit operation to the specified measurement category, voltage, or amperage ratings.• Do not use test leads if they are damaged. Examine the test leads for damaged insulation and measure a known voltage.• Do not use in CAT III or CAT IV environments without the protective cap installed. The protective cap decreases the exposed probe metal to <4 mm. This decreases the possibility of arc flash from short circuits.106/107 Users Manual6Table 1 is a list of the symbols used on the Product and in this manual. Table 1. SymbolsConsult user documentation. WARNING. RISK OF DANGER. Static awareness. Static discharge can damage part(s). WARNING. HAZARDOUS VOLTAGE.Risk of electric shock.AC (Alternating Current) EarthDC (Direct Current) CapacitanceBoth direct and alternating current DiodeBattery FuseConforms to relevant South KoreanEMC Standards Certified by TÜV SÜD Product Service. Conforms to European Union directives. Certified by CSA Group to North Americansafety standards.Digital Multimeters Safety Information 7 Table 1. Symbols (cont.)Measurement Category II is applicable to test and measuring circuits connected directly to utilization points (socket outlets and similar points) of the low-voltage MAINS installation.Measurement Category III is applicable to test and measuring circuits connected to the distribution part of the building’s low-voltage MAINS installation. Measurement Category IV is applicable to test and measuring circuits connected at thesource of the building’s low-voltage MAINS installation.This product complies with the WEEE Directive marking requirements. The affixed label indicates that you must not discard this electrical/electronic product in domestic household waste. Product Category: With reference to the equipment types in the WEEE Directive Annex I, this product is classed as category 9 "Monitoring and Control Instrumentation" product. Do not dispose of this product as unsorted municipal waste.8Digital Multimeters Instrument Overview9DisplayFigure 1 and Table 2 show the items on the Product display.hhc02.epsFigure 1. Display106/107 Users Manual10 Table 2. DisplayItem Description Item DescriptionHighvoltage Frequency is selected Display Hold is enabled FaradsContinuityselected MillivoltsDiode test is selected Amps or voltsDuty Cycle is selected Dc or ac voltage or currentDecimalprefix Auto Range mode is enabled Ohmsisselected Low battery. Replace battery. Auto Power OffThe Product automatically powers off after 20 minutes of inactivity.To restart the Product, turn the rotary switch back to the OFF position and then to a necessary position.To disable the Auto Power Off function, hold down the YELLOW button when turning on the Product, until PoFF shows on the display.Digital Multimeters Auto Backlight Off11Auto Backlight OffThe backlight automatically turns off after 2 minutes of inactivity.To disable the Auto Backlight Off function, hold down when turning on the Product, until LoFF shows on the display.NoteTo disable both the Auto Power Off function and the Auto Backlight Off function, hold down the YELLOW button and at the same time, until both PoFF and LoFF show on the display.MeasurementsData HoldWarningTo prevent possible electrical shock, fire or personal injury, do not use the HOLD function to measure unknown potentials. When HOLD is turned on, the display does not change when a different potential is measured.To hold the present reading, push . Push again to continue normal operation.106/107Users Manual12Measure AC and DC Voltage To measure ac and dc voltage:1. Choose ac or dc by turning the rotary switch to or .2. Connect the red test lead to the terminal and the black test lead to the COMterminal. 3. Measure the voltage by touching the probes to the correct test points of the circuit. 4. Read the measured voltage on the display.Digital MultimetersMeasurements13Figure 2. Measure AC and DC Voltage106/107Users Manual14Measure AC or DC CurrentWarningTo prevent possible electrical shock, fire, or personal injury, remove circuit power before you connect the Product in the circuit when you measure current. Connect the Product in series with the circuit. 1. Turn the rotary switch to .2. Push the YELLOW button to toggle between ac or dc current measurement.3. Connect the red test lead to the A terminal to be measured and connect the black testlead to the COM terminal. 4. Break the circuit path to be measured.5. Connect the test leads across the break and apply power.6. Read the measured current on the display.Digital MultimetersMeasurements15Figure 3. Measure AC and DC Current106/107Users Manual 16Measure Resistance1. Turn the rotary switch to (106 does not have ). Make sure power is disconnectedfrom the circuit to be measured. 2. Connect the red test lead to the terminal and the black test lead to the COMterminal. 3. Measure the resistance by touching the probes to the desired test points of the circuit. 4. Read the measured resistance on the display. Test for ContinuityWith the resistance mode selected, push the YELLOW button once to activate the continuity mode. If the resistance is <70 Ω, the beeper sounds continuously, designating a short circuit. If the Product reads , the circuit is open.Digital MultimetersMeasurements17Figure 4. Measure Resistance/Continuity106/107Users Manual18Test Diodes (107 Only) 1. Turn the rotary switch to .2. Push the YELLOW button twice to activate the diode test mode.3. Connect the red test lead to the terminal and the black test lead to the COMterminal. 4. Connect the red probe to the anode and the black test lead to the cathode of the diodebeing tested. 5. Read the forward bias voltage value on the display.6. If the polarity of the test leads is reversed with diode polarity, the display reading shows. This can be used to distinguish the anode and cathode sides of a diode.Digital MultimetersMeasurements19Measure Capacitance 1. Turn the rotary switch to .2. Connect the red test lead to the terminal and the black test lead to the COMterminal. 3. Touch the probes to the capacitor leads. 4. Let the reading stabilize (up to 18 seconds). 5. Read the capacitance value on the display. Measure Frequency and Duty Cycle (107 Only)The Product can measure frequency or duty cycle while making either an ac voltage or an ac current measurement.1. Pushto change the Product to frequency or duty cycle. 2. When the Product is in the required function (ac voltage or ac current), push . 3. Read the frequency on the display.4. To make a duty cycle measurement, push again.5. Read the percent of duty cycle on the display.106/107Users Manual20MaintenanceBeyond replacing the batteries and fuse, do not attempt to repair or service the Product unless you are qualified to do so and have the relevant calibration, performance test, and service instructions. The recommended calibration cycle is 12 months.WarningTo prevent possible electrical shock, fire, or personal injury: • Remove the input signals before you clean the Product. • Use only specified replacement parts. • Use only specified replacement fuses.• Have an approved technician repair the Product.For safe operation and maintenance of the Product, repair the Product before use if the batteries leak.Digital MultimetersMaintenance21General MaintenancePeriodically wipe the case with a damp cloth and mild detergent. Do not use abrasives or solvents. Dirt or moisture in the terminals can affect readings. To clean the terminals:1. Turn the Product off and remove the test leads.2. Shake out any dirt that may be in the terminals.3. Soak a new swab with isopropyl alcohol and work around the inside of each inputterminal. 4. Use a new swab to apply a light coat of fine machine oil to the inside of each terminal.106/107Users Manual 22Test the Fuse1. Turn the rotary switch to (106 does not have ).2. Plug a test lead into the terminal and touch the probe to the A terminal.• A good A terminal fuse is indicated by a reading less than 0.1 Ω. • If the display reads , replace the fuse and test again.• If the display shows any other value, have the Product serviced. See Service andParts . Replace Batteries and the FuseTo replace the batteries or the fuse, see Figure 5.CautionBe sure to observe Electro Static Discharge precautions.Digital Multimeters Service and Parts23Figure 5. Replace Batteries and the Fuse106/107Users Manual24Service and PartsIf the Product fails, first check the batteries and fuse. Then, review this manual to make sure you are operating the Product correctly. Replacement parts are:ItemFluke Part NumberBatteries 2838018Battery door 4319659 Test leads TL1754306653Fuse 803293 Screws 4320657Digital Multimeters General Specifications25General SpecificationsMaximum voltage between any terminaland Earth Ground ............................................................ 600 VFuse protection for A input ............................................ 11 A, 1000 V, IR 17 kA Display (LCD)................................................................... 6000 counts, updates 3/sec Battery Type .................................................................... 2 AAA, NEDA 24A, IEC LR03 Battery Life ...................................................................... 200 hours minimum TemperatureOperating ...................................................................... 0 °C to 40 °C Storage ......................................................................... -30 °C to 60 °C Relative HumidityOperating Humidity ....................................................... Non-condensing when <10 °C;≤90 % at 10 °C to 30 °C; ≤75 % at 30 °C to 40 °C Operating Humidity, 40 M Ω Range ............................... ≤80 % at 10 °C to 30 °C;≤70 % at 30 °C to 40 °C AltitudeOperating ...................................................................... 2000 m Storage ......................................................................... 12,000 m106/107Users Manual26Temperature Coefficient ................................................. 0.1 X (specified accuracy) / °C (<18 °C or>28 °C) Size (HxWxL).................................................................... 142 mm x 69 mm x 28 mm Weight .............................................................................. 200 gIP Rating ........................................................................... IEC 60529: IP 40 SafetyGeneral ......................................................................... IEC 61010-1: Pollution Degree 2 Measurement ................................................................ IEC 61010-2-033: CAT III 600 V Electromagnetic Compatibility (EMC)International .................................................................. IEC 61326-1: Portable, IEC 61326-2-2CISPR 11: Group 1, Class A Group 1: Equipment has intentionally generated and/or uses conductively-coupled radio frequency energy that is necessary for the internal function of the equipment itself.Class A: Equipment is suitable for use in all establishments other than domestic and those directly connected to a low-voltage power supply network that supplies buildings used for domestic purposes. There may be potential difficulties in ensuring electromagnetic compatibility in other environments due to conducted and radiated disturbances.Digital Multimeters General Specifications27Emissions that exceed the levels required by CISPR 11 can occur when the equipment is connected to a test object. The equipment may not meet the immunity requirements of this standard when test leads and/or test probes are connected.Korea (KCC) ................................................................. Class A Equipment (Industrial Broadcasting &Communication Equipment) Class A: Equipment meets requirements for industrial electromagnetic wave equipment and the seller or user should take notice of it. This equipment is intended for use in business environments and not to be used in homes.USA (FCC) ................................................................... 47 CFR 15 subpart B. This product is consideredan exempt device per clause 15.103.106/107Users Manual28Accuracy SpecificationsAccuracy is specified for 1 year after calibration, at operating temperatures of 18 °C to 28 °C, relative humidity at 0 % to 75 %. Accuracy specifications take the form of: ±([% of Reading] + [Number of Least Significant Digits]).Function Range Resolution Accuracy 106 107 AC Volts(40 Hz to 500 Hz) [1]6.000 V 60.00 V 600.0 V 0.001 V 0.01 V 0.1 V 1.0 % + 31.0 % + 3DC Volts6.000 V 60.00 V 600.0 V 0.001 V 0.01 V 0.1 V 0.5 % + 3 0.5 % + 3AC Millivolts600.0 mV0.1 mV3.0 % + 3 3.0 % + 3Diode Test [2]2.000 V 0.001 V N/A 10 %[1] All AC, Hz, and duty cycle are specified from 1 % to 100 % of range. Inputs below 1 % of range are not specified. [2] Typically, open circuit test voltage is 2.0 V and short circuit current is <0.6 mA.Digital MultimetersAccuracy Specifications29FunctionRange Resolution Accuracy106 107 Resistance400.0 Ω 4.000 k Ω 40.00 k Ω 400.0 k Ω 4.000 M Ω 40.00 M Ω 0.1 Ω 0.001 k Ω 0.01 k Ω 0.1 k Ω 0.001 M Ω 0.01 M Ω 0.5 % + 3 0.5 % + 2 0.5 % + 2 0.5 % + 2 0.5 % + 2 1.5 % + 3 0.5 % + 3 0.5 % + 2 0.5 % + 2 0.5 % + 2 0.5 % + 2 1.5 % + 3 Capacitance [1]50.00 nF 500.0 nF 5.000 µF 50.00 µF 500.0 µF 1000 µF0.01 nF 0.1 nF 0.001 µF 0.01 µF 0.1 µF 1 µF2 % + 5 2 % + 5 5 % + 5 5 % + 5 5 % + 5 5 % + 52 % + 5 2 % + 5 5 % + 5 5 % + 5 5 % + 5 5 % + 5106/107 Users Manual30Function Range ResolutionAccuracy106 107Frequency [2]Hz(10 Hz to 100 kHz)50.00 Hz500.0 Hz5.000 kHz50.00 kHz100.0 kHz0.01 Hz0.1 Hz0.001 kHz0.01 kHz0.1 kHzNA 0.1 % + 3 Duty Cycle [2] 1 % to 99 % 0.1 % NA 1 % typical [3][1] Specifications do not include errors due to test lead capacitance and capacitance floor (may be up to 1.5nF in the50nF range).[2] All AC, Hz, and duty cycle readings are specified from 1 % to 100 % of range. Inputs below 1 % of range are notspecified.[3] Typical means when the frequency is at 50Hz or 60Hz and the duty cycle is between 10 % and 90 %.Digital MultimetersAccuracy Specifications31Function Range ResolutionAccuracy 106 107 AC Current (40 Hz to 200 Hz)[1]4.000 A 10.00 A 0.001 A 0.01 A 1.5 % + 31.5 % + 3DC Current[1]4.000 A 10.00 A0.001 A 0.01 A1.5 % + 3 1.5 % + 3[1] 10 A duty cycle <7 minutes on, 20 minutes off, 25 °C to 40 °C.106/107 Users Manual32Function OverloadProtectionInput Impedance(Nominal)Common ModeRejection RatioNormal ModeRejection Ratio AC Volts 600 V [1] >10MΩ <100 pF [2]>60 dB at dc,50 Hz or 60 Hz_AC Millivolts 600 mV >1 M, <100 pF>80 dB at dc,50 Hz or 60 Hz_DC Volts 600 V [1] >10MΩ <100 pF>100 dB at50 Hz or 60 Hz>60 dB at50 Hz or 60 Hz[1] 6 x 105 V Hz Max.[2] For mV (AC), input impedance is approximately 1MΩ.。
物理实验：数字万用表使用手册
一．概述二．开箱检查三．安全工作准则四．国际电气符号五．综合指标六．外形结构图１．直流电压测量连接示意图九．测量操作说明八．显示符号说明２．交流电压测量４．电阻测量６．电路通断测量５．二极管测量８．频率测量七．按键功能１１２３３４６９１０１０１１３．直流或交流电流测量１３１５１８１７１９２０７．电容测量十．技术指标１．直流电压测量２．交流电压测量３．直流电流测量２１２１２１２２４．交流电流测量５．电阻测量２２２３２３２４２５（１）．直流电压２５（３）．直流电流２６２６（４）．交流电流２７（５）．电阻（６）．带直流偏置的交流电压校正２７（７）．带直流偏置的交流电流校正２７３１１．一般的保养和维修３２２．更换保险丝管十六．保养和维护３１十二．ＲＳ２３２Ｃ 标准串行接口２８十三．ＵＳＢ接口３０十四．接口软件的安装与使用３１十五．仪表误操作指示一览表３１UT805ＵＴ８０５使用说明书一、概述 ＵＴ８０５是一种５ １／２位台式真有效值数字万用表（以下简称仪表）。
整机电路设计以大规模集成模拟和数字电路相组合，采用微机技术以２４位Ａ／Ｄ转换器为核心、高精度的运算放大器、真有效值的交直流转换器、全电子调校技术赋于仪表高可靠性、高精度。
仪表可用于测量交直流电压、交直流电流、电阻、二极管、电路通断、电容、频率，并具备存储回读功能。
ＲＳ２３２Ｃ和ＵＳＢ接口技术的应用使其和计算机构成可靠多种的双向通讯。
仪表采用独特的外观设计，采用目前最时尚的ＶＦＤ显示器，仪表采用交流市电供电使之成为性能更优越的高精度电工仪表。
本使用说明书包括有关的安全信息和警告提示等，请仔细阅读有关内容并严格遵守所有的警告和警告：在使用仪表之前，请仔细阅读有关 安全信息和要求二、开箱检查 打开包装盒取出仪表，请仔细检查下列附件是否缺少或损坏，如发现有任何一项缺少或损坏，请即与你的供应商联系。
l 使用说明书 一本l 表笔 一副l 电源线 一根l 带护套鳄鱼夹 一副l ＲＳ２３２接口线 一根l ＵＳＢ接口线 一根l 转接插座 一个l 接口软件光盘 一张l ＵＮＩ－Ｔ中、英文保用证 一张UT805三、安全工作准则 本仪表严格遵循ＧＢ４７９３电子测量仪器安全要求以及安全标准ＩＥＣ１０１０－１和ＩＥＣ１０１０－２－０３２进行设计和生产。
数字万用表使用方法
2010-01-27 10:15数字万用表使用方法简介：数字万用表相对来说，属于比较简单的测量仪器。
本篇，作者就教大家数字万用表的正确使用方法。
从数字万用表的电压、电阻、电流、二极管、三极管、MOS场效应管的测量等测量方法开始，让你更好的掌握万用表测量方法。
一、电压的测量1、直流电压的测量，如电池、随身听电源等。
首先将黑表笔插进“com”孔，红表笔插进“V Ω”。
把旋钮选到比估计值大的量程（注意：表盘上的数值均为最大量程，“V－”表示直流电压档，“V～”表示交流电压档，“A”是电流档），接着把表笔接电源或电池两端；保持接触稳定。
数值可以直接从显示屏上读取，若显示为“1.”，则表明量程太小，那么就要加大量程后再测量工业电器。
如果在数值左边出现“-”，则表明表笔极性与实际电源极性相反，此时红表笔接的是负极。
2、交流电压的测量。
表笔插孔与直流电压的测量一样，不过应该将旋钮打到交流档“V～”处所需的量程即可。
交流电压无正负之分，测量方法跟前面相同。
无论测交流还是直流电压，都要注意人身安全，不要随便用手触摸表笔的金属部分。
二、电流的测量1、直流电流的测量。
先将黑表笔插入“COM”孔。
若测量大于200mA 的电流，则要将红表笔插入“10A”插孔并将旋钮打到直流“10A”档；若测量小于200mA的电流，则将红表笔插入“200mA”插孔，将旋钮打到直流200mA以内的合适量程。
调整好后，就可以测量了。
将万用表串进电路中，保持稳定，即可读数。
若显示为“1.”，那么就要加大量程；如果在数值左边出现“-”，则表明电流从黑表笔流进万用表。
交流电流的测量。
测量方法与1相同，不过档位应该打到交流档位，电流测量完毕后应将红笔插回“VΩ”孔，若忘记这一步而直接测电压，哈哈！你的表或电源会在“一缕青烟中上云霄”－－报废！三、电阻的测量将表笔插进“COM”和“VΩ”孔中，把旋钮打旋到“Ω”中所需的量程，用表笔接在电阻两端金属部位，测量中可以用手接触电阻，但不要把手同时接触电阻两端，这样会影响测量精确度的－－人体是电阻很大但是有限大的导体。
数字万用表的使用方法_快速学会电子技术（双色版）_[共7页]
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三、数字万用表的使用方法1．基本使用方法数字万用表是有源仪表，必须接上电源才能工作，因此使用数字万用表时应首先装上电池。
大多数数字万用表使用层叠电池，以DT890B型数字万用表为例，如图2-66所示，打开数字万用表后盖，装入1枚9V层叠电池，再将后盖盖好。
然后将表笔插入数字万用表的插孔中。
一般习惯上将红表笔按不同测量需要分别插入VΩ或mA 或A插孔，作为正表笔；将黑表笔插入COM插孔，作为负表笔。
按下控制面板上的电源开关（Power），LCD显示屏应有“000”字符显示。
如果显示出“BAT”字样，表示电池电压不足，应更换新电池。
图2-66 装入电池使用数字万用表进行测量时，首先应根据测量对象选择相应的挡位，然后估计测量对象的大小，选择合适的量程。
例如测量9V电池的开路电压，可选择直流电压20V挡，如图2-67所示。
如果无法估计测量对象的大小，则应先选择该挡位的最大量程，然后根据显示情况逐步减小量程，直至能够准确显示读数。
选择测量量程时，应尽量使LCD显示屏中显示较多的有效数字，以提高测量精度。
例如测量1.5V电池的开路电压，选择直流电压的200V、20V、2V挡均可测量，但2V挡显示的小数点后有效数字最多，因此测量精度较高，如图2-68所示。
如果显示屏仅在最高位显示“1”，表示测量对象超过所选量程，应选择更高量程进行测量。
2．测量直流电压测量直流电压时，红表笔插入VΩ插孔，为正表笔；黑表笔插入COM插孔，为负表笔。
转动测量选择开关至直流电压挡V，数字万用表构成直流电压表，直接并联于被测电压两端即可测量。
例如，需测量某电池GB的电压，将正表笔接电池正极、负表笔接电池负极，如图2-69所示，LCD显示屏即显示出被测电池的电压。
图2-67 测量挡位图2-68 选择小数点后较多有效数字图2-69 并联测量直流电压因为数字万用表具有自动显示正、负极性的功能，实际上测量过程中即使正、负表笔接反也能正确显示测量结果。
数字万用表的使用方法详细图解
现在，数字式测量仪表已成为主流，有取代模拟式仪表的趋势。
与模拟式仪表相比，数字式仪表灵敏度高，准确度高，显示清晰，过载能力强，便于携带，使用更简单。
下面以ＶＣ９８０２型数字万用表为例，简单介绍其使用方法和注意事项。
（１）使用方法ａ使用前，应认真阅读有关的使用说明书，熟悉电源开关、量程开关、插孔、特殊插口的作用．ｂ将电源开关置于ＯＮ位置。
ｃ交直流电压的测量：根据需要将量程开关拨至ＤＣＶ（直流）或ＡＣＶ（交流）的合适量程，红表笔插入Ｖ／Ω孔，黑表笔插入ＣＯＭ孔，并将表笔与被测线路并联，读数即显示。
ｄ交直流电流的测量：将量程开关拨至ＤＣＡ（直流）或ＡＣＡ（交流）的合适量程，红表笔插入ｍＡ孔（＜２００ｍＡ时）或１０Ａ孔（＞２００ｍＡ时），黑表笔插入ＣＯＭ孔，并将万用表串联在被测电路中即可。
测量直流量时，数字万用表能自动显示极性。
ｅ电阻的测量：将量程开关拨至Ω的合适量程，红表笔插入Ｖ／Ω孔，黑表笔插入ＣＯＭ孔。
如果被测电阻值超出所选择量程的最大值，万用表将显示１，这时应选择更高的量程。
测量电阻时，红表笔为正极，黑表笔为负极，这与指针式万用表正好相反。
因此，测量晶体管、电解电容器等有极性的元器件时，必须注意表笔的极性。
（２）．使用注意事项ａ如果无法预先估计被测电压或电流的大小，则应先拨至最高量程挡测量一次，再视情况逐渐把量程减小到合适位置。
测量完毕，应将量程开关拨到最高电压挡，并关闭电源。
ｂ满量程时，仪表仅在最高位显示数字１，其它位均消失，这时应选择更高的量程。
ｃ测量电压时，应将数字万用表与被测电路并联。
测电流时应与被测电路串联，测直流量时不必考虑正、负极性。
ｄ当误用交流电压挡去测量直流电压，或者误用直流电压挡去测量交流电压时，显示屏将显示０００，或低位上的数字出现跳动。
ｅ禁止在测量高电压（２２０Ｖ以上）或大电流（０．５Ａ以上）时换量程，以防止产生电弧，烧毁开关触点。
ｆ当显示、ＢＡＴＴ或ＬＯＷＢＡＴ时，表示电池电压低于工作电压。
TH1942 数字万用表用户手册说明书
V1.0.0手册印刷历史：印刷历史反映了手册的修订状态，它包括版本号和出版日期，该手册将不断完善以利于用户更好的了解和使用。
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TH1942用户手册Ver1.0．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．．2007-6声明：本公司可能对该产品的性能、功能、软件、结构、外观、附件、包装以及用户手册等进行的完善和提高，恕不另行通知！如有疑惑，请与本公司联系。
目录第一章概述 (1)1.1概述 (1)1.2使用条件 (2)1.2.1电源 (2)1.2.2环境温度与湿度 (2)1.3体积与重量 (2)1.4安全标记及注意事项 (2)1.5开箱检查 (3)1.6标志 (3)1.7保修 (3)第二章多用表简介 (4)2.1简介 (4)2.2前面板简述 (5)2.2.1屏幕指示信息 (6)2.2.2前面板菜单一览 (7)2.2.3前面板菜单参考 (7)2.2.4菜单操作说明 (8)2.3后面板介绍 (9)2.4开机准备及开机状态 (10)2.4.1连接电源 (10)2.4.2输入端介绍 (10)2.4.3开机程序 (11)2.4.4高压线路测量的安全注意事项 (11)2.4.5开机缺省状态 (12)2.4.6预热时间 (12)2.5显示屏 (12)第三章基本测量 (13)3.1开始 (13)3.2电压测量 (13)3.2.1连接方法 (13)3.3电流测量 (14)3.3.1连接方法 (14)3.3.2AMPS保险丝的更换 (16)3.4电阻测量 (16)3.4.1连接方法 (16)3.4.2屏蔽保护 (17)3.5频率和周期测量 (17)3.5.1测量误差 (17)3.5.2门限时间 (18)3.5.3连接方法 (18)3.6导通测量 (19)3.6.1连接方法 (19)3.7二极管测试 (20)3.7.1连接方法 (20)3.8交直流真有效值测量功能 (20)3.8.1连接测试方法 (20)3.8.2连接测试方法 (21)3.9选择第二显示 (21)3.9.1操作使用 (21)3.9.2操作使用 (22)3.10数学运算功能 (22)3.10.1Percent (22)3.10.2dB计算 (23)3.10.3dBm计算 (24)第四章测量选项 (26)4.1测量配置 (26)4.1.1量程 (26)4.1.2相对运算(Relative) (27)4.1.3速度（Rate） (27)4.2触发操作 (28)4.2.1触发流程 (28)4.3最大最小值（MAX/MIN） (30)4.4极限比较测量（Compare Operations） (30)4.4.1打开极限比较测量（Enabling compare） (30)4.4.2设置极限比较范围（Setting Compare Limit Values） (30)4.5系统应用（System Operations） (31)4.5.1蜂鸣器控制（Beep） (31)4.5.2按键音（Key Sound） (32)4.5.3自检（Self-test） (32)4.5.4校准（Calibration） (32)第五章远程操作 (33)5.1RS-232接口说明及操作 (33)5.1.1RS-232接口简介 (33)5.1.2RS-232操作 (34)5.2数据格式 (36)第六章SCPI命令参考 (37)6.1命令结构 (37)6.2命令语法 (37)6.2.1命令关键字和参数： (37)6.2.2命令关键字缩写规则 (39)6.2.3命令结构基本规则： (39)6.2.4多重命令规则 (40)6.2.5命令路径规则 (40)6.3命令参考 (41)6.3.1DISPlay子系统命令 (41)6.3.2FUNCtion子系统命令 (42)6.3.3VOLTage子系统命令 (43)6.3.4CURRent子系统命令 (46)6.3.5RESIister子系统命令 (49)6.3.6FREQuency和PERiod子系统命令 (51)6.3.7HOLD子系统命令 (53)6.3.8TRIGger子系统命令 (54)6.3.9FETCh子系统命令 (54)6.3.10共命令 (55)i.附录A (56)介绍 (56)技术说明 (56)ii.附录B (62)程序举例 (62)第一章概述感谢您购买和使用我公司产品。
数字万用表说明书.pdf_1700028980.7641792
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在初次使用该仪器前，请您详细地阅读使用说明书，将可帮助您正确使用该仪器。
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优利德仪表 UT71系列智能型数字万用表 使用说明书
UT71A/B/C/D/E 使用说明书
UT71A/B/C/D/E 使用说明书
序言
尊敬的用户： 您好！感谢您选购全新的优利德仪表，为了正确使用本仪表，请您在本仪表使用之前仔细阅读本说明书全文，特
别有关“安全注意事项”的部分。 如果您已经阅读完本说明书全文，建议您将此说明书进行妥善的保管，与仪表一同放置或者放在您随时可以查阅
7. 测量时功能开关必须置于正确的量程档位。在功能 量程开关转换之前，必须断开表笔与被测电路的连 接，严禁在测量进行中转换档位，以防损坏仪表。
8. 进行在线电阻、二极管或电路通断测量之前，必须 先将电路中所有的电源切断，并将所有的电容器放 尽残余电荷。
9. 测量电流以前，应先检查仪表的保险丝是否完好， 在仪表连接到电路上之前，应先将电路的电源关 闭。
20
相对测量REL提示符
21
LOW
数据设置下限值提示符
22
AUTO
自动量程提示符
23
SEND
数据发送提示符
24
背光功能提示符
25
HOLD
数据保持提示符
26 PEAK HOLD 峰值数据保持提示符
27
HIGH
数据设置上限值提示符
28
二极管测量提示符
29
OL 超量程提示符
30
%
频率信号占空比测量或(4～
12 MHz kHz Hz 频率单位: 兆赫兹 千赫兹 赫兹
13
mV、V 电压单位: 毫伏、伏
14 μA、mA、A 电流单位: 微安、毫安、安培
15 nF、μF、mF 电容单位: 纳法、微法、毫法
UT58A、UT58B、UT58C 数字万用表使用说明书
(See Figure 5)forOverviewWarningTo avoid electric shock or personal injury, read the “Safety Information”, carefully before using the Meter.Digital Multimeters Model UT58A, UT58B and UT58C are 2000-count hand-held instruments with remarkable features: ex-large LCD, steady operations, overload protection for all ranges and unique structure. The Meter can measure AC/DC voltage, AC/DC current, resistance, capacitance, temperature, frequency, transistor, diode and continuity, and is equipped with data hold, full icon display and sleep mode functions.Unpacking InspectionIn the event you find any missing or damaged part, please contact your dealer immediately.1 English Operating Manual2 Test Lead3 Multi-Purpose Socket4 Point Contact Temperature Probe (UT58B/UT58C only)59V Battery (NEDA 1604, 6F22 or 009P)Item DescriptionQty 1 pc 1 pair 1 pc 1 pc 1 pcSafety InformationThis Meter complies with the standards IEC61010:Pollution Degree 2, Overvoltage Category (CAT. II 1000V,CAT. III 600V) and Double Insulation.CAT . II: Local level, appliance, PORTABLE EQUIPMENT etc., with smaller transient voltage overvoltages than CAT. IIICAT. III: Distribution level, fixed installation, with smaller transient overvoltages than CAT. IVUse the Meter only as specified in this operating manual,otherwise the protection provided by the Meter may be impaired.In this manual, a Warning identifies conditions and actions that pose hazards to the user, or may damage the Meter or the equipment under test.A Note identifies the information that user should pay WarningTo avoid possible electric shock or personal injury,and to avoid possible damage to the Meter or to the equipment under test, adhere to the following rules:●Before using the Meter inspect the case. Do not use the Meter if it is damaged or the case (or partof the case) is removed. Look for cracks or missing plastic. Pay attention to the insulation around the connectors.●Inspect the test leads for damaged insulation orexposed metal. Check the test leads for continuity. Replace damaged test leads with identical model number or electrical specifications before using the Meter.●Do not apply more than the rated voltage, as marked on the Meter, between the terminals or between any terminal and grounding.●The rotary switch should be placed in the right position and no any changeover of range shall be made during measurement to prevent damage of the Meter.●When the Meter working at an effective voltage over 60V in DC or 30V rms in AC, special care should be taken for there is danger of electric shock.●Use the proper terminals, function, and range for your measurements.●If the value to be measured is unknown, use the maximum measurement position and reduce the range step by step until a satisfactory reading is obtained.do not alter the internal circuit of the Meter randomly.●Soft cloth and mild detergent should be used to clean the surface of the Meter when servicing.No abrasive and solvent should be used to prevent the surface of the Meter from corrosion, damage and accident.●The Meter is suitable for indoor use.●Turn the Meter power off when it is not in useand take out the battery when not using for a long time.●Constantly check the battery as it may leak when it has been using for some time, replace the battery as soon as leaking appears. A leaking battery will damage the Meter.●Do not use or store the Meter in an environmentof high temperature,humidity,explosive,inflammable and strong magnetic field. The performance of the Meter may deteriorate after dampened.●When using the test leads, keep your fingers behind the finger guards.●Disconnect circuit power and discharge all high -voltage capacitors before testing resistance, continuity, diodes, capacitance or current.●Before measuring current, check the Meter’s fuses and turn off power to the circuit before connecting the Meter to the circuit.●Replace the battery as soon as the battery indicator appears. With a low battery, the Meter might produce false readings that can lead to electric shock and personal injury.●Remove test leads, test clips and temperature probe from the Meter and turn the Meter power off before opening the Meter case.●When servicing the Meter, use the replacement parts with the same model or identical electrical specifications.●To avoid any damage to the meter or any accident,(Figure 1)The Meter Structure (See Figure 1)1.LCD Display.2.HOLD Button.3. Rotary Switch.4. Input Terminals.5.POWERFunctional ButtonsBelow table indicated for information about the functional button operations.(Figure 2)(See Figure 2)(Figure 3)WarningTo avoid harms to you or damages to the Meter from electric shock, please do not attempt to measure voltages higher than 1000V although readings may be obtained.The DC Voltage ranges are: 200mV, 2V, 20V, 200V and 1000V.The AC Voltage ranges are: 2V, 20V, 200V and 750V Measurement OperationA. Measuring DC and AC Voltage (See Figure 4)(See Figure 3)T HzV or V ΩCOM input terminal.2. Set the rotary switch to an appropriate measurement position in V or V range.3. Connect the test leads across with the object to be measured.The measured value shows on the display.(figure 4)WarningNever attempt an in-circuit current measurement where the open circuit voltage between terminals and ground is greater than 250V .If the fuse burns out during measurement, the Meter may be damaged or the operator himself may be hurt.WarningTo avoid damages to the Meter or to the devices under test, disconnect circuit power and discharge all the high-voltage capacitors before measuring resistance.The resistance ranges are:Model UT 58A/UT58B:200Ω,2k Ω,20k Ω,2M Ω,20M Ω and 200M Ω.Model UT 58C:200Ω, 2k Ω, 20k Ω, 2M Ω and 20M Ω.V Ω (UT58C)orV Ω COM terminal.2. Set the rotary switch to an appropriate measurement position in Ω range.3. Connect the test leads across with the object being measured.The measured value shows on the e proper terminals, function, and range for the measurement. When the testing leads are connected to the current terminals, do not parallel them across any circuit.The DC Current ranges are:Model UT58A/ UT58B: 20µA,2mA,20mA,200mA and 20A.Model UT58C: 2mA, 200mA, 20A The AC Current ranges are: 2mA, 200mA and 20ATo measure current, do the following:1.Turn off power to the circuit. Discharge all high- voltage capacitors.2. Insert the red test lead into the A or µAmA (UT58A) or mA (UT58B/UT58C) terminal and the black test lead into the COM terminal.3.Set the rotary switch to an appropriate measurement position in A or A range.4. Break the current path to be tested. Connect the red test lead to the more positive side of the break and the black test lead to the more negative side of the break.5. Turn on power to the circuit.The measured value shows on the display.(Figure 6)Note●The test leads can add 0.1to 0.2Ω of error to the slow- resistance measurement. To obtain accurate readings in low-resistance, short-circuit the input terminals beforehand and record the reading obtained (called this reading as X). (X) is the additional resistance from the test lead. Then use the equation:measured resistance value (Y) – (X)=accurate readings of resistance.●If the input terminal short-circuit reading 0.5,check the test leads for any looseness or other cause.●For high resistance (>1M Ω), it is normal taking several seconds to obtain a stable reading; select short test leads for stable and precise readings.●When the resistance is higher than the maximum range or in open circuit condition, the Meter displays “1”.●When resistance measurement has been completed, disconnect the connection between the testing leads and the circuit under test.WarningTo avoid damage to the Meter or to the equipment under test, disconnect circuit power and discharge all high-voltage capacitors before measuring diodes.To avoid harms to you, please do not attempt to input voltages higher than 60V DC or 30V rms AC.Use the diode test to check diodes, transistors, and other semiconductor devices. The diode test sends a current through the semiconductor junction, and then measures the voltage drop across the junction. A good silicon junction drops between 0.5V and 0.8VTo test out a diode out of a circuit, connect the Meter as follows:V Ω V Ω 3. component, place the red test lead on the component’sattention to.(See Figure 6)(See Figure 7)3. Remove the 3 screws from the case bottom, and Fused Protection for uA mA Input Terminals:G. Measuring TemperatureI. Measuring Frequency (UT58C Only)anode and place the black test lead on the component’s cathode.The measured value shows on the display.●The open-circuit voltage is around 3V.●When diode testing has been completed, disconnect the connection between the testing leads and the circuit under test.WarningTo avoid harms to you, please do not attempt to input voltages higher than 60V DC or 30V rms AC.To avoid damages to the Meter or to the devices under test, disconnect circuit power and discharge all the high-voltage capacitors before testing for continuity.To test for continuity, connect the Meter as below:VΩ (UT58C)orV Ω 2. Set the rotary switch to measured.4. The buzzer does not sound if the resistance of a circuit under test is >70ΩThe buzzer sounds continuously if the circuit is in good condition with resistance value 10Ω.The measured value shows on the display and the unit is Ω.forPOWERMaximum Voltage or Current between input Terminals and Grounding: According to different functional input protection value.● CE Version: 0.5A, 250V fast type, 5x20mm.●Maximum Display : 1999,updates 2~3 times/ second.●Range : Manual ranging.●Polarity display : Automatically ●Overloading : Display “1”.●Low Battery Indication : Display “ ”.●Temperature: Operating: 0C~40C (32F~104F);Storage : -10C~50C(14F~122F)●ElectromagneticCompatibility : In a radio field of 1 V/m,Overall Accuracy = SpecifiedAccuracy + 5% of Range;in a radio field of more than1 V/m, no assigned accuracyis specified.●Battery Type : One piece of 9V (NEDA1604 or 6F22 or 006P).●Dimensions : 179x88x39mm.●Weight : Approx.380g (including holster and battery)●Safety/Compliances : IEC61010 CAT II 1000V, CATIII 600V overvoltage●Certificate:●Relative Humidity : 75%@00C~300C;50%@300C~400CRemarks:●Input Impedance: approx.10M Ω.●Frequency response: 40Hz~1kHz< 500V; 40Hz~400Hz > 500VThe 500Hz reading is for reference●Display sinewave RMS value(AVG response)Accuracy SpecificationsAccuracy:(a% reading + b digits),guarantee for 1 year.Operating temperature:18C~28C.Relative humidity: 75%RH.Remarks:●At 20A Range:For continuous measurement 10 seconds and interval time between 2 measurement greater than 15 minutes.Remarks:●Frequency reaponse: 40Hz~400Hz●At 20A Range:For continuous measurement 10 seconds and interval time between 2 measurement greater than theK. Frequency ( UT58C only)Range Resolution Overload ProtectionAccuracy2kHz 1Hz 20kHz 10Hz±(1.5%+5) 250V ACMaintenanceThis section provides basic maintenance information including battery and fuse replacement instruction.WarningDo not attempt to repair or service your Meter unless you are qualified to do so and have the relevantcalibration, performance test, and service information.To avoid electrical shock or damage to the Meter, do not get water inside the case.A. General Service●Periodically wipe the case with damp cloth and mild detergent. Do not use chemical solvent.●To clean the terminals with cotton bar with detergent, as dirt or moisture in the terminals can affect readings.●Turn the Meter off when it is not in use and take out the battery when not using for a long time.●Do not store the Meter in place of humidity, high temperature, explosive, inflammable and strong magnetic fieldWarningTo avoid electrical shock or arc blast, or personal injury or damage to the Meter, use specified fuses ONLY in accordance with the following procedure.To replace the Meter’s fuse:1. Turn the Meter off and remove all connections from the terminals.2. Remove the holster from the Meter.3. Remove the 3 screws from the case bottom, and separate the case top from the case bottom.4. Remove the fuse by gently prying one end loose, then take out the fuse from its bracket.5.Install ONLY replacement fuses with the identical type and specification and make sure the fuse is fixed firmly in the bracket.Fuse: 0.5A, 250V, fast type,φ5x20mm6. Rejoin the case bottom and case top, and reinstall the 3 screws and holster.Replacement of the fuses is seldom required. Burning of a fuse always results from improper operation.C.Replacing the Battery (See Figure 10)To replace the Meter’s battery:1. Turn the Meter power off and remove all connections from the terminals.2. Remove the holster from the Meter.separate the case top from the case bottom.4. Remove the battery from the battery connector.5. Replace with a new 9V battery (NEDA1604, 6F22 or 006P).6. Rejoin the case bottom and case top, and reinstall the 3 screws and the holster.WarningTo avoid false readings, which could lead to possible electric shock or personal injury, replace the battery as soon as the battery indicator “ ” appears.** END **This operating manual is subject to change without notice.(See Figure 9)P/N:110401104226X DATE:2018.06.26 REV.8。
万用表手册ZT-QS9-CN
使用手册一、概述本产品是用电池驱动的、带真有效值的自动量程钳形数字万用表。
仪表为6000字显示，采用LCD 显示器，有背光显示，读数清晰。
二、安全事项为避免可能的电击、火灾、及人身伤害，在使用之前，请先阅读安全注意事项。
(1)测量时，请勿超过“技术规格”中规定的最大测量值。
(2)36V 以下的电压为安全电压，在测高于36V 直流或25V 交流电压时，要检查表笔是否可靠接触、是否正确连接、是否绝缘良好等，以避免电击。
(3)换功能和量程时，表笔应离开测试点。
(4)选择正确的功能和量程，超量程显示为“OL”。
(5)安全符号说明：三、规格参数存在危险电压接地双绝缘低电压符号操作者必须参阅说明书零火线判断技术规格功能量程分辨率精度最大测量值频率响应直流电压 6.000V 0.001V ±(0.5%+3)600V60.00V 0.01V 600.0V 0.1V 交流电压6.000V0.001V ±(1.0%+3)600V40Hz-1kHz60.00V 0.01V 600.0V0.1V 直流电流60.00A 0.01A ±(2.0%+30)600A600.0A 0.1A 交流电流60.00A 0.01A 40Hz-400Hz600.0A0.1A功能量程分辨率精度最大测量值频率响应电阻600.0Ω0.1Ω±（1.5%+3）±(0.5%+3)60M Ω6.000k Ω0.001k Ω60.00k Ω0.01k Ω600.0k Ω0.1k Ω6.000M Ω0.001M Ω60.00M Ω0.01M Ω±(1.5%+3)电容6.000nF 0.001nF ±(5.0%+20)60.00mF60.00nF 0.01nF ±2.0%+5600.0nF 0.1nF 6.000μF 0.001μF 60.00μF 0.01μF 600.0μF 0.1μF 6.000mF 0.001mF ±(5.0%+5)60.00mF 0.01mF 频率±(0.1%+2)300KHz60.00Hz 0.01Hz 600.0Hz 0.1Hz 6.000kHz 0.001kHz 60.00kHz 0.01kHz 300.0kHz0.1kHz二极管√通断√启动电流测量√峰值保持√手电筒/背光√温度(-30~1000)℃1℃±(2.5%+5）1000℃(-22~1832)℉1℉1832℉通用技术指标显示屏（LCD ）6000字量程自动材质ABS 采样速率3次/秒真有效值√数据保持√低电量提示√自动关机√机械技术规格尺寸185*65*30mm重量165g电池类型 1.5V AAA 电池* 2保修期一年环境工作环境温度0~40℃湿度＜75%存储环境温度-20~60℃湿度＜80%四、使用方法(1) 操作面板说明（见右图）1. 钳头2. 手电筒3. 钳头扳机。
胜利VC86E数字万用表 _PDF_C23339_2015-12-01
目 录1、概述 (1)2、开箱检查 (2)3、安全注意事项 (3)4、安全符号说明 (5)5、仪表面板说明 (6)6、按键功能说明 (7)7、其它功能 (8)8、特性 (9)9、通讯连接 (27)10、仪表保养 (28)11、 故障排除 (29)一、概述VICTOR 86E是带USB电脑接口，可自动转换量程的4 1/2位数字仪表，是一种性能稳定、用电池驱动的高可靠性数字多用表。
仪表采用 42mm字高LCD 显示器，读数清晰；具有数据保持和自动关机功能，更加方便使用。
此仪表可用来测量直流电压和交流电压、直流电流和交流电流、电阻、电容、温度、二极管、通断测试、频率及占空比等参数。
整机以大规模集成电路的双积分A/D转换为核心，具有自动和手动选择功能，是一款性能优越的工具仪表，是实验室、工厂、无线电爱好者及家庭的理想工具。
1/29二、开箱检查打开包装箱，仔细检查以下配件是否缺少或损坏，如有缺少或损坏请立即与经销商联系。
数字多用表 一台型热电偶） 一个接口电缆 一根电池 一节2/293/29三、安全注意事项该仪表在设计上符合IEC1010条款（国际电工委员会颁布的安全标准）。
使用污染等级II 的安全要求进行设计和生产。
在使用之前，请先认真阅读说明书。
警 告:为避免危险和使用者的安全,在使用仪表之前请仔细阅读本使用手册,并严格遵守安全警告信息和操作说明来使用本仪表。
1.在测量30V 以上电压,测量10mA 以上电流,测量带电感负载的交流电力线;测量电力波动期间的交流电力线时, 谨防电击。
2.测量前，检查测量功能开关是否置于正确的档位,要检查表笔是否可靠接触，是否正确连接、是否绝缘良好等，以避免电击。
3.仪表只有和所配备的表笔一起使用才符合安全标准要求。
如表笔线破损时,必须更换上同样型号或者相同电气规格的表笔线。
4.不要使用其它未经确认或未认可的保险管来更换仪表内部的保险管。
只能换上同样型号或相同规格的保险管。
kyoritsu 1009 数字万用表使用说明书
MODEL1009KYORITSU ELECTRICAL INSTRUMENTS WORKS,LTD., 1. Safety WarningsThis instrument has been designed, manufactured and tested according to the following standards. IEC 61010-1, IEC61010-2-033 Measurement voltage CATⅢ 300V Pollution degree 2 IEC 61010-031 IEC 61326-1This instruction manual contains warnings and safety rules which must be observed by the user to ensure safe operation of the instrument and retain it in safe condition. Therefore, read through these operating instructions before using the instrument. 2. FeaturesThis instrument, 1009, is a Digital Multimeter which designed for making measurement of the low-voltage equipment. (1) Designed to international safety standards. (6) Auto-ranging function IEC 61010-1, IEC61010-2-033 Measurement CAT.Ⅲ 300V Pollution degree 2 (7) Frequency measurement function IEC61010-031 (Requirements for the hand-held probe) (8) DUTY measurement function (2) REL function to check the difference of measured values (Express Pulse width / Pulse period as a percentage) (3) Auto power off function to save battery consumption (9) Current function is protected by fuse (4) Data hold function (10) Instrument is protected from mechanical shock by holster. (5) Diode and Continuity check function 3. Specification● Measuring ranges and accuracy (23±5℃, under the 45%〜75%RH)RangesＤＣＶ400ｍＶ４Ｖ40Ｖ400Ｖ600Ｖ0〜600V (5 Autoranging)Input impedance approx. 10MΩ±0.6%rdg ±4dgt±1.0%rdg ±4dgt±1.6%rdg ±4dgt (50 / 60Hz)±2.0%rdg ±4dgt (〜400Hz)±1.3%rdg ±4dgt (50 / 60Hz)±1.7%rdg ±4dgt (〜400Hz)±1.6%rdg ±4dgt (50 / 60Hz)±2.0%rdg ±4dgt (〜400Hz)±2.0%rdg ±4dgt ±1.0%rdg ±4dgt20〜399.9mVInput impedance approx. 10MΩ0〜600V (4 Autoranging)Input impedance approx. 10MΩ0〜4000uA (2 Autoranging)0〜400mA (2 Autoranging)400ｍＶ４Ｖ40Ｖ400Ｖ600Ｖ400ｕＡ4000ｕＡ40ｍＡ400ｍＡＡＣＶＤＣＡMeasuring rangeAccuracyIEC61010-031IEC61326-1（EMC）●Environmental standard EN50581 Monitoring and control instruments● Mode of operation △∑mode● Indication LCD maximum value 3999 (ACV/A, DCV/A, Ω, F) / maximum value 5119 (Hz) / units, symbols● Over range display "OL" symbol is displayed on the LCD.In case that the value is beyond effective measuring range at the position of Ω function range and manual range.● Auto-ranging Range shifts to upper range when indicated value is more than 3999.Range shifts to lower range when indicated value is less than 360.● Sampling rate approx. 400mS● Operating Environmental −indoor use conditions −altitude up to 2000m ● Temperature & Humidity range (guaranteed accuracy) 23℃±5℃ Relative humidity: less than 75%● Operating Temperature & Humidity range 0℃〜+40℃ Relative humidity: less than 80%● Storage Temperature & Humidity range -20℃〜+60℃ Relative humidity: less than 70%● Insulation Resistance It should be more than 10MΩ/DC1000V between electrical circuit and enclosures.● Withstand Voltage It should be more than AC3470V/ for five seconds between electrical circuit and enclosures.● Overload Protection Voltage function : 400mV range : 250V(RMS.) 10seconds except for 400mV range : 600V(RMS.) 10seconds Resistance function : 250V (RMS.) 10seconds Capacity function : 250V (RMS.) 10seconds Frequency function : 250V (RMS.) 10seconds Current function : uA, mA : Protected by 600V0.5A fuse A : Protected by 600V/10A fuse ● Dimensions / Weight approx. 155(L) x 75(W) x 33(D) mm / approx. 260g(including batteries)● Power source Two R6P(AA)1.5V or equivalent ● Accessories Test lead 1set / R6P (AA) 2p.c.s / Holster 1 /Instruction manual 1● FuseF 600V/500mA(fast acting type), φ6.3 x 32mm / F 600V/10A(fast acting type), φ6.3 x 32mm 4. Instrument Layout①Function Selector Switch ②Display ③RESET Key ④SELECT Key ⑤RANGE Key ⑥REL Key ⑦HOLD Key ⑧Hz/DUTY Key⑨Measuring terminal (V/Ω/Hz) ⑩Measuring terminal (COM)⑪Measuring terminal (mA) ⑫Measuring terminal (A)⑬Test Leads ⑭Holster ⑮Barrier ⑯Cap⑬⑮⑮⑯⑯Barrier: p rovides protection against electrical shock and ensuring the minimum required air andcreepage distances.Cap:Choose and use the test leads and caps that are suitable for the measurement category. When the instrument and the test lead are combined and used together, whichever lower category either of them belongs to will be applied. 5. Preparation 5-1 Checking Battery Voltage Set the Function Selector Switch to other positions except the OFF position. Battery Voltage is enough if indication is clear and symbol is not indicated in this bout. If symbol is indicated or no indication on the display, follow to the Battery Replacement procedures shown in item8 in this document and replace with new batteries. 6. Measurements 6-1 Voltage Measurement (DCV, ACV) (1) Insert the black test lead plug into the COM terminal and the red test lead plug into the VΩHz terminal. (2) Set the Function Selector Switch to "" position.(Then, "AUTO" and "mV" symbols are indicated on the display.) (3) C onnect the black test lead to the negative side of the circuit under the test and the red test lead to the positive side of the circuit, then themeasured value is indicated on the display. If you connect the test leads the other way, "ー" symbol is indicated on the display. 6-1-2 AC Voltage Measurement (ACV) (2) Set the Function Selector Switch to "" position.(Then, "AC", "AUTO", and "V" symbols are indicated on the display.) Measured value is indicated on the display.Note) When you make measurement of the voltage less than 20mV at the AC400mV range, the measurement value cannot be indicated correctly. Even if short-circuit the input line at the range of AC4V, 1〜3dgt may remain indicated. In that case, by pressing REL key, "0" will be indicated. 6-2 Current Measurement (DCA/ACA) (1) Insert the black test lead plug into the COM terminal and the red test lead plug into the mA terminal. (2) Set the Function Selector Switch to the appropriate "uA" or "mA" position. I n case that the measurement current is 3999uA or less, set the Function Selector Switch to "uA" position, and it is 399.9mA or less, set theFunction Selector Switch to "mA" position.(Then, "AUTO", and "uA"or "mA" symbols are indicated on the display.) (3) Power off the circuit under test. (4) C onnect the black test lead to the negative side of the circuit under the test and the red test lead to the positive side of the circuit so the instrumentis in the series with the circuit. (5) Power on the circuit under test. (6) Measured value is indicated on the display. If you connect the test leads the other polarity, "ー" symbol is indicated on the display. 6-2-2 DC Current Measurement (up to 10A) (1) Insert the black test lead plug into COM terminal and the red test lead plug into the A terminal. (2) Set the Function Selector Switch to the "A" position.(Then, "AUTO", and "A" symbols are indicated on the display.) (3) Power off the circuit under test. (4) C onnect the black test lead to the negative side of the circuit under the test and the red test lead to the positive side of the circuit so the instrumentis in the series with the circuit. (5) Power on the circuit under test. (6) Measured value is indicated on the display. If you connect the test leads the other polarity, "ー" symbol is indicated on the display. 6-2-3 AC Current Measurement (up to 400mA) (1) Insert the black test lead plug into the COM terminal the red test lead plug into the mA terminal. (2) Set the Function Selector Switch to the appropriate "uA" or "mA" position. I n the case of the measurement current is 3999uA or less, set the Function Selector Switch to "uA" position, and it is 399.9mA or less, set theFunction Selector Switch to "mA" position.(Then, "AUTO", and "uA"(or "mA") symbols are indicated on the display.) (3) Set the instrument to AC mode by pressing SELECT Key.(Then, "AC" symbol is indicated on the display.) (4) Power off the circuit under test. (5) Connect the test leads to the circuit under test so the instrument is in the series. (6) Power on the circuit under test. (7) Measured value is indicated on the display. 6-2-4 AC Current Measurement (up to 10A) (1) Insert the black test lead plug into the COM terminal and the red test lead plug into the A terminal. (2) Set the Function Selector Switch to "A" position.(Then, "AUTO" and "A" symbols are indicated on the display.) (3) Set the instrument to AC mode by pressing SELECT Key.(Then, "AC" symbol is indicated on the display.) (4) Power off the circuit under test. (5) Connect the test leads to the circuit under test so the instrument is in the series. (6) Power on the circuit under test. (7) Measured value is indicated on the display. 6-3 Resistance Measurement (Ω/ Diode check/ Continuity Check) 6-3-1 Resistance Measurement (1) Insert the black test lead plug into the COM terminal and the red test lead plug into the VΩHz terminal. (2) S et the Function Selector Switch to "Ω" position.(Then, "AUTO" and "MΩ" symbols are indicated on the display.) Make sure that the "O.L" symbol is indicated on the display at this bout, then short the test lead tips and check "0" is indicated on the display. (3) Connect the test leads to both ends of the resistance under test. Measured value is indicated on the display.Note) Even if short the test lead tips, indicated value may not be "0". But this is because of the resistance of test leads and not a failure. In that case, by pressing REL key, "0" will be indicated. 6-3-2 Diode Check (1) Insert the black test lead plug into the COM terminal the red test lead plug into the VΩHz terminal. (2) Set the Function Selector Switch to "Ω" position.(Then, "AUTO" and "MΩ" symbols are indicated on the display.) (3) Press the SELECT Key one time and set the instrument to Diode Check mode. (Then, "" and "V" symbols are indicated on the display.) Make sure that the ".OL" symbol is indicated on the display at this bout, then short the test lead tips and check "0" is indicated on the display. (4) Connect the black test lead to the cathode side of the Diode and the red test lead to the anode side of the Diode. Forward voltage of Diode is indicated on the display. (5) Connect the black test lead to the anode side of the Diode and the red test lead to the cathode side of the Diode. Normally, ".OL" symbol is indicated on the display. Conclusion : Diode is OK if the instrument complies with above items(3) and (4).Note) Open-circuit voltage between measuring terminals is approx.1.5V.(measuring current approx. 0.4mA) 6-3-3 Continuity Check (1) Insert the red test lead plug into the VΩHz terminal and the black test lead plug into COM terminal. (2) Set the Function Selector Switch to "Ω" position.(Then, "AUTO" and "MΩ" symbols are indicated on the display.) (Then, "" and "Ω" symbols are indicated on the display.) M ake sure that the "OL." symbol is indicated on the display at this bout, then short the test lead tips and check "0" is indicated on the display and check if the buzzer beeps. (4) Connect the test leads to both ends of the resistance under test. Measured value is indicated on the display. The buzzer beeps below about 100Ω.Note) E ven if short the test lead tips, indicated value may not be "0". But this is because of the resistance of test leads and not a failure. In that case, by pressing REL key, "0" will be indicated. 6-4 Capacitance Measurement (1) Insert the black test lead plug into the COM terminal and the red test lead plug into the VΩHz terminal. (2) Set the Function Selector Switch to "" position.(Then, "AUTO" and "nF" symbols are indicated on the display.) (3) Press the REL key and "0" shall be indicated.(Then, "REL△" symbol is indicated on the display.) (4) Connect the test leads to both ends of the resistance under test. Measured value is indicated on the display. Measuring unit "nF" / "uF" is automatically chosen and indicated due to the measured value.Note) It may take some time according to the measuring capacitance. Measuring capacitance < 4uF ---------- Measuring time is about 2seconds Measuring capacitance < 40uF ---------- Measuring time is about 7seconds Measuring capacitance < 100uF ---------- Measuring time is about 15seconds 6-5 Frequency Measurement (2) Set the Function Selector Switch to "Hz" position.(Then, "Hz" symbol is indicated on the display.) (3) Connect the test leads to the circuit under test. Measured value is indicated on the display. Frequency can be measured at ACV, DCV, ACA and DCA functions by pressing "Hz/DUTY" Switch. Concerning with the direction for use of "Hz/ DUTY" Switch, please reference to the item7-6 Hz/DUTY in this document.Note) The minimum input can be measured is approx. 1.5V. Readings of frequency may fluctuate or be influenced under noisy environment. 7. How to use Function Switches 7-1 SELECT Key This key is to chose the measuring function at Ω/ Diode Check/ Continuity function and Current function(uA, mA, A). Actions at each function are as below. ● Ω/ Diode Check/ Continuity function W hen setting the instrument to "Ω/ Diode Check/ Continuity" function, "Ω"measuring mode has been selected in the initial condition. By pressing "SELECT" Key, measuring mode changes. "Ω" → "Diode Check" → "Continuity Check" ● Current function (uA, mA, A) When setting the instrument to any function of the "uA", "mA", and "A", DC Current M easuring mode has been selected in the initial condition. By pressing "SELECT" Key, measuring mode changes. "DC" → "AC" 7-2 RESET Key By pressing "RESET" Key, all functions can be reset to their initial conditions. Range setting, Mode setting and Data hold are all released and every function is back to its initial condition. 7-3 RANGE Key A t each "ACV", "DCV", "Ω", "uA", "mA" and "A" function, setting for the measuring ranges can be done manually by pressing "RANGE" Key. ("AUTO"symbol disappears from the display.) Every time when pressing "RANGE" Key, range moves. In order to change from manual mode to Auto-ranging, there are following 3ways. 1) Press "RANGE" Key for 2seconds 2) Change to the other functions. 3) Press "RESET" Key 7-4 REL Key The difference between measured values can be indicated on the display at each "ACV", "DCV", "Ω", "Capacitance", "ACA" and "DCA" function. When pressing "REL" Key, "REL△"symbol lights up and the value under measuring is stored. After that, the difference between stored value and measuring value is indicated on the display. It can be released by pressing the "REL" Key again, changing to the other functions or pressing the "RESET" Key. 7-5 HOLD Key The measured value can be hold at all functions. By pressing "HOLD" Key, "H" symbol indicated on the display and the indicated value can be held. By pressing "HOLD" Key again, "H" symbol disappears from the display and held data is released. 7-6 Hz/DUTY Key Making measurement for frequency of input signal and DUTY(Pulse width / Pulse period). (1) Change from normal measurement to "Frequency Measurement" and "DUTY Measurement". Every time when pressing "Hz/DUTY" Key, it changes in the following sequence from normal measurement. "Frequency" → "DUTY" → "Normal measurement" To measure a frequency, measure the voltage on the electrical circuit in advance. Then press the "Hz/DUTY" Key to enter into frequency measurement. Readings of frequency may fluctuate or be influenced under noisy environment. Caution: Frequency measuring range at ACV, DCV, ACA, DCA Functions by pressing the Hz/DUTY Key is as follows. Measurable frequency range: 1 to 10kHz (2) Change Frequency and DUTY at "Hz/DUTY" function. By pressing "Hz/DUTY" Key, it changes in the sequence : "Frequency" → "DUTY". 8. Auto Power Off Auto power off function operates when about 30minutes passed after power on this instrument. When Auto power off function operates and the instrument powered off, the power-off statue returns to normal by pressing any key. And it is possible to release the Auto power off function. Turn the function switch from OFF position to the function you want with pressing SELECT key, and power on the instrument. 9. Battery & Fuse Replacement (2) Remove the holster from the instrument. (3) Loosen one screw on the bottom of the Instrument and open the battery Cover then replace batteries. 9-2 Fuse replacement (1) Remove test leads from the instrument. (2) Remove the holster from the instrument. (3) Loosen two screws on the bottom of the instrument and open the battery cover, then replace fuses. 10. Maintenance Use a cloth dipped in water or neutral detergent for cleaning the instrument. Do not use abrasives or solvents.Kyoritsu reserves the rights to change specifications or Designs described in this manual without notice and without obligations. DISTRIBUTOR。
万用表的使用方法图解
万用表又叫多用表、三用表、复用表，是一种多功能、多量程的测量仪表，一般万用表可测量直流电流、直流电压、交流电压、电阻和音频电平等，有的还可以测交流电流、电容量、电感量及半导体的一些参数（如β）。
1．万用表的结构（500型）万用表由表头、测量电路及转换开关等三个主要部分组成。
（1）表头：它是一只高灵敏度的磁电式直流电流表，万用表的主要性能指标基本上取决于表头的性能。
表头的灵敏度是指表头指针满刻度偏转时流过表头的直流电流值，这个值越小，表头的灵敏度愈高。
测电压时的内阻越大，其性能就越好。
表头上有四条刻度线，它们的功能如下：第一条（从上到下）标有R或Ω，指示的是电阻值，转换开关在欧姆挡时，即读此条刻度线。
第二条标有∽和VA，指示的是交、直流电压和直流电流值，当转换开关在交、直流电压或直流电流挡，量程在除交流10V以外的其它位置时，即读此条刻度线。
第三条标有10V，指示的是10V的交流电压值，当转换开关在交、直流电压挡，量程在交流10V时，即读此条刻度线。
第四条标有dB，指示的是音频电平。
（2）测量线路测量线路是用来把各种被测量转换到适合表头测量的微小直流电流的电路，它由电阻、半导体元件及电池组成它能将各种不同的被测量（如电流、电压、电阻等）、不同的量程，经过一系列的处理（如整流、分流、分压等）统一变成一定量限的微小直流电流送入表头进行测量。
（3）转换开关其作用是用来选择各种不同的测量线路，以满足不同种类和不同量程的测量要求。
转换开关一般有两个，分别标有不同的档位和量程。
2．符号含义（1）∽表示交直流（2）V－2.5KV 4000Ω/V 表示对于交流电压及2.5KV的直流电压挡，其灵敏度为4000Ω/V（3）A－V－Ω 表示可测量电流、电压及电阻（4）45－65－1000Hz 表示使用频率范围为1000 Hz以下，标准工频范围为45－65Hz（5）2000Ω/V DC 表示直流挡的灵敏度为2000Ω/V钳表和摇表盘上的符号与上述符号相似（其他因为符号格式不对不能全部写上『表示磁电系整流式有机械反作用力仪表『表示三级防外磁场『表示水平放置）））3．万用表的使用（1）熟悉表盘上各符号的意义及各个旋钮和选择开关的主要作用。
1011 1012 数字式万用表 使用说明
使用说明数字式万用表1．安全警告本仪器根据以下标准进行设计、生产，并且于检查合格后在最好状态下出货。
IEC 61010-1过电压CAT III 300V污染度2IEC 61010-031IEC 61326本说明书包含警告和安全规则，记载了避免人身伤害事故和保持仪器能在长期良好状态下使用的注意事项。
因此，使用仪器前请仔细阅读操作指南。
警告仪器上标志，提醒用户在操作时，必须参阅相关操作说明。
标志分为3种，请注意阅读其不同内容。
请勿在非正常情况下进行测量，例如：仪器机体损坏，仪表或测试线金属部件的裸露。
：交：电阻：二极管：温度2．特长本仪器是可以进行电压、电流、电阻、电容、频率和DUTY等测试的多功能数字式万用表。
●符合安全规格的安全设计。
IEC 61010-1 过电压CAT III 300V污染度2IEC 61010-2-031 （对手持型探棒的要求事项）●采用可正确测试变形波的真有效值整流回路（True RMS）设计。
（KEW 1012C）●温度测试功能（KEW 1011C）●确认测量值的差的REL机能。
●防止不必要电池消耗的自动关机功能●数据保留功能●二极管和导通测试功能●自动量程功能●频率测试功能●DUTY（脉冲幅/ 脉冲周期用%显示）测量功能●电流功能由保险丝保护。
●软套保护仪器不易受冲击。
3．规格KEW 1011C测量范围和精确度（温湿度23±5℃、45~75%RH）注意：量程的*表示自动量程的初始值。
KEW 1012C测量范围和精确度（温湿度23±5℃、45~75%RH）注意：量程的*表示自动量程的初始值。
功率因数（CF ）≤3 ●安全规格 IEC 61010-1 CAT. III 300V 污染度2 / CAT.II 600V 污染度2IEC 61010-031 IEC 61326● 工作方式方式● 显示 液晶，最大6000（ACV/A,DCV/A,Ω,）/最大9999（Hz ）/最大4000（F ） 单位，记号 ● 输入过量显示 OL 显示（Ω量程及手动量程设定时超过测试范围） ● 自动量程 显示值6040以上时上升一个量程 显示值560以下时下降一个量程● 采样率 约400ms● 使用环境 室内使用，海拔2000m 以下 ● 精确度保证温湿度范围 23℃±5℃ 相对湿度75%以下 ● 使用温湿度范围 0℃~+40℃ 相对湿度80%以下 ● 保存温湿度范围 -20℃~+60℃相对湿度90%以下● 绝缘电阻 电气回路和外箱间100MΩ以上/DC 1000V ● 耐电压 电气回路和外箱间AC3700V/分钟 ●过负荷保护（过电压保护）电压 720V （RMS.）10秒 电阻 600V （RMS.）10秒 电容 600V （RMS.）10秒 频率 600V （RMS.）10秒电流 μA ，mA 600V 0.8A 保险丝保护 A 600V 10A 保险丝保护 ● 外形尺寸 约161（L ）× 82（W ）× 50（D ）mm （含软套） ●重量 约280g （含电池，软套）●电源单3干电池R6P（AA）1.5V×2或等量电量●附件测试线×1 单3干电池R6P（AA）×2使用说明书×1 K型温度探棒× 1（KEW 1011C）●使用保险丝 F 600V/800mA（速断型）φ6.3×32mmF 600V/10A（速断型）φ6.3×32mm本仪器的过负荷保护（过电压保护）为以上记载的电压。
UT33B C D数字万用表操作手册说明书
• Display backlight willNOT beautomatically offunless
pressing theBLUE button.
Measurement Operation A. DCVoItage asurement(seefigure 2)
Figu re 2
.<!> Warning
C. DCCurrentMeasurement (seefigure 3)
1) 2) 3) DisDIav Bad<IIchI Button 4} 5) 6) 7)
6
Figure 1
indicated for information about the functional button
ss
once enter m e.
• Press HOLDagom toexit holdmode.
• In H<*lmode,l:Iis displayde an thepresent buttononceto tumthedisplay backlight
I on.
BLUE button • PressBLUE button again to tumthe display backlight off.
U N I - T UT33 B/C/D OPERATING MANUAL
• The eteris suitablefor indoor use. • Tum the Meteroff when it is not in use and take out the battery whennot using for a long time. • Constantly check the battery as it mayleakwhenit has been using for some time, replacethe battery as soon as leaking appears. A leaking battery will damage the Mete.r
RadioShack 22-811 数字万用表说明书
Radio shack digital multimeter manual 22 811
▼ Scroll to page 2 of 64 advertisement Thank you for your participation! * Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project Want more? Advanced embedding details, examples, and help! Detail Specifications: 1371/1371130-22811.pdf file (05 May 2023) Radio Shack 22-811 PDF Manual Online: Accompanying Data: Radio Shack 22-811 Measuring Instruments PDF Owner's Manual (Updated: Friday 5th of May 2023 08:05:20 PM) Rating: 4.9 (rated by 21 users) Compatible devices: TACL Series, F-460, PMC-690, Sound Level Meter, 33-2055, Hydromess F, 21-533, GauGeCaLXP. Recommended Documentation: (Ocr-Read Version Summary of Contents, UPD: 05 May 2023) 1, © 2001 RadioShack Corporation. All Rights Reserved. RadioShack and are trademarks used by RadioShack Corporation. 22-811 OWNER’S MANUAL — Please read before using this equipment. %106'065 Introduction ....................................................... 1 A Word About Safety ........................................ 1 Special Panel Ma… 2, Radio Shack 22-811 2 tremendous current surge potential. This is especially true for three-phase industrial electrical panels. A small spark from one of these panels can cause a plasma explosion and fire that can severely burn you. Do not hold the meter while using it. • Always wear pre shield, and fireproof arm and upper body protection while … 3, 3 #"37+%-".11-"#6" ;174"/'6'4 24'2#4#6+10 +056#..+0)"#"$#66'4; Your meter requires one 9-volt battery (not supplied) for power. For the best performance and longest life, we recommend a RadioShack alkaline battery. WARNINGS: • To avoid electrical shock, disconnect all of the meter’s test leads from any equipment before yo… 4, 4 3. To select manual range mode, press RANGE while the meter is in auto-range mode. 7KJE 7KJE7KJE 7KJE disappears. 4. Repeatedly press RANGE to select different ranges. The decimal point shifts each time you press RANGE . 5. Hold down RANGE for about 2 seconds, the meter exits manual range mode and returns to its auto range mode. 6.
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数字万用表的基础知识
数字万用表亦称数字多用表DMM（digital multimeter）
一、数字万用表的特点
1、数字万用表采用数字化测量技术，将被测电量均转换成电压信号，并以数
字形式显示。
2、准确度高
3、测量范围宽
4、测量速度快2～5次／秒
5、微功耗
6、集成度高，体积小，重量轻，可靠性好
7、测量种类多，功能齐全，操作简便
二．技术特性
1．测量范围
⑴交、直流电压（交流频率为45Hz～500Hz）；量程分别为200mV、2V、20V、200V和1000五档，直流精度为±（读数的％＋2个字）以下，交流精度为±（读数的1％＋5个字）；输入阻抗，直流档为10MΩ，交流档为10MΩ、100PF。
⑵交、直流电流量程分别为200μA、2mA、200mA和10A五档，直流精度为±（读数的％＋2个字），交流精度为±（读数的％＋5个字），最大电压负荷为250mV（交流有效值）。
⑶电阻：量程分别为：200Ω、2kΩ、200kΩ、2MΩ和20MΩ档。
精度为±（读数的％＋3个字）。
⑷二极管导通电压：量程为
0～，测试电流为1mA ±mA 。
⑸三极管β值检测：测试条件为：V CE ＝，I B ＝10μA 。
⑹短路检测：测试电路电阻＜
20Ω±10Ω
2．采样时间：T S ＝。
三．使用方法
1．准备
2．按下电源开关，观察液晶显示是否正常，有否电池缺电标志出现，若有则要先更换电池。
3．使用
（1）交、直流电流的测量：根据测量电流的大小选择适当的电流测量量程和红表笔的插入孔，测量直流时，红表笔接触电压高一端，黑表笔接触电压低的一端，正向电流从红表笔流入万用表，再从黑表笔流出，当要测量的电流大小不清楚的时候，先用最大的量程来测量，然后再逐渐减小量程来精确测量。
（2）交、直流电压的测量：红表笔插入“V/Ω”插孔中，根据电压的大小选择适当的电压测量量程，黑表笔接触电路“地”端，红表笔接触电路中待测点。
特别要注意，数字万用表测量交流电压的频率很低（45～500Hz ），中高频率信号的电压幅度应采用交流毫伏表来测量。
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