Midea DL334004 DIGITAL MULTIMETER User Manual
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WARRANTY This instrument is warranted to be free from defects in material and workmanship for a period of one year. Any instrument found defective within one year from the delivery date and returned to the factory with transportation charges prepaid, will be repaired, adjusted, or replaced at no charge to the original purchaser. This warranty does not cover expandable items such as battery or fuse. If the defect has been caused by a misuse or abnormal operating condition, the repair will be billed at a nominal cost. DL334004 DIGITAL MULTIMETER INTRODUCTION This instrument is a compact 3 3/4 digits digital multimeter designed to measure DC and AC voltage, DC and AC current, resistance, diode, continuity, transistor hFE, capacitance U Se FS АЛ a Г] U a | and frequency. It features non-contact ac voltage detection, data hold, relative measurement, backlight, and etc. It is easy to operate and is a useful test tool. SAFETY INFORMATION The meter has been designed according to IEC 61010 concerning electronic measuring instruments with a measurement category (CAT Il 1000V) and pollution degree 2. À Warning To avoid possible electric shock or personal injury, follow these guidelines: e Do not use the meter if it is damaged. Before you use the meter, inspect the case. Pay particular attention to the insulation surrounding the connectors. e Inspect the test leads for damaged insulation or exposed metal. Check the test leads for continuity. Replace damaged test leads before you use the meter. e Do not use the meter if it operates abnormally. Protection may be impaired. When in doubt, have the meter serviced. e Donot operate the meter where explosive gas, vapor, or dust is present. e Donot apply more than the rated voltage, as marked on the meter, between terminals Read this manual thoroughly before use or between any terminal and earth ground. e Before use, verify the meters operation by measuring a known voltage. e When measuring current, turn off circuit power before connecting the meter in the circuit. Remember to place the meter in series with the circuit. e When servicing the meter, use only specified replacement parts. e Use caution when working with voltage above 30V ac rms, 42V peak, or 60V dc. Such voltages pose a shock hazard. When using the probes, keep your fingers behind the finger guards on the probes. When making connections, connect the common test lead before you connect the live == Alternating Current test lead. When you disconnect test leads, disconnect the live test lead first. e Remove the test leads from the meter before you open the battery cover or the case. e Do not operate the meter with the battery cover or portion of the case removed or loosened. e To avoid false readings, which could lead to possible electric shock or personal injury, replace the battery as soon as the low battery indicator ( =] ) appears. symbols === Direct Current DC or AC Caution, risk of danger, refer to the operating manual before use. Caution, risk of electric shock. Earth (ground) Terminal e Do not use the meter if the meter or your hand is wet or if the environment is too wet. e Do not touch any naked conductor with hand or skin. D "PB I Fuse Ty And do not ground yourself while using the meter. E e Adhere to local and national safety codes. Individual protective equipment must be used Conforms to European Union directives [0] The equipment is protected throughout by double insulation or reinforced insulation. to prevent shock and arc blast injury where hazardous live conductors are exposed. e Use the meter only as specified in this manual; otherwise the safety features provided by the meter may be impaired. FRONT PANEL e Remaining endangerment: | When an input terminal is connected to dangerous live potential, it is to be noted that A 11 this potential can occur at all other terminals! /(- | | __ AN e CAT || - Measurement Category ll is for measurements u À performed on circuits directly connected to low voltage installation. ( Examples are Son Fl measurements on household appliances, portable tools and similar equipments. ) 4 ВЕ: ¿0 D Uf. |. Do not use the meter for measurements with т Measurement Categories Ш and IV. | | | | | “eve es mme Ä a | = 1) — — 9 | ; © i wie © Caution | “ol jo са 8 To avoid possible damage to the meter or to the equipment under test, follow these | . guidelines: me ® Disconnect circuit power and discharge all capacitors thoroughly before testing resistance, continuity, diode, capacitance, or transistor. | i e Use the proper terminals, function and range for your measurements. | 6 warmen mA A Pc L e Before current measurement, check the meter's fuses. © | e Before turning the rotary switch to change function, disconnect the test leads from the PA „®: Figure 1 circuit under test Nt — нии e Remove all test leads from the meter before connecting transistor to the meter. ee 1 3 3/4 digits LCD display 2. " SEL/REL " Button E На 14 - This * SEL/REL " button can be used to switch between diode and continuity test functions. + i | in voltage, current, capacitance or resistance function, this button can be used to enter/exit 11777 © |MKOHZ, NCV nq VA = O 1 == “0000 3. Rotary Switch 0 9 Used to select the desired function and/or range as well as to turn on or off the meter. oe | с} || | | [ | | 7— @ а « Veau u Va 6 To save battery charge, set this rotary switch in the OFF position to turn off the meter | AUTO >| -))) REL when the meter is not in use. 5 | | | | _ _ 4. "10A " Terminal 9 4 3 2 Figure 2 Plug-in connector for the red test lead for measuring current which 1$ between 400mA and 104. Explanations: 5. “mA pA " Terminal 1. В PP. Transistor hFE test function is selected. Plug-in connector for the red test lead for measuring current which is less than 400mA. 2 REL .. The meter is in Relative mode. 6. "СОМ " Terminal 5, )) RER Continuity test function is selected. Plug-in connector for the black test lead. „ ОЧЕН 4. + ....... Wiode test function is selected. 7. "ae. " Terminal | Plug-in connector for the red test lead for voltage, resistance, diode, continuity, capacitance AUTO asa AA OA and frequency measurements. 6. ...... The battery is low and must be replaced immediately. 8. Transistor Test Socket 7. H un . The meter is in Data Hold mode. 9. "@] " Button 8. DC....... oc This " H " button can be used to enter/exit Data Hold mode. o 9. MY ....... Negative sign Hold down this button for about 2 secs to turn on or off the backlight. The backlight will AC turn off automatically after about 30 secs. 10. AY nu. AC 11: 7 sata . The absolute value of the present reading is = 30V. This icon is intended to 10. Holster | | remind you to use caution and avoid electric shock. 11. NCV Sensor 12. ©) ....... Automatic power-off feature is enabled. Used in non-contact ac voltage detection. 13. NCV .... The meter is in non-contact ac voltage detection function. 14. Units Tuntorvonage | — NS SPECIFICATION - Millivolt: V: Volt; 1V = 10%mV | | mV, V mV: Millivolt; V: Volt; Accuracy is specified for a period of one year after calibration and at 18°C to 28°C. with relative humidity < 75%. Unit of current Accuracy specifications take the form of : | HA, mA, А uA: Microampere: mA: Milliampere; A: Ampere | 1 ([% of Reading]+[number of Least Significant Digits]) | 1A = 103тА = 10°uA Unit of resistance | AC Voltage | Q, КО, MO N: Ohm: КО: Kilohm; МО: Megohm | a a 1МО = 103КО = 1080 ne | Resolution Accuracy —— _4V ___0.001V _ | Unit of capacitance A0, 0.01V = + (1.0% + 5) nF, pF, mF nF: Nanofarad; UF: Microfarad; mF: Millifarad 0 a a 2 | 1mF = 10%4F = 10°nF — — me _ _— — — — Input Impedance: About 10MQ Unit of frequency | Frequency Range: Hz, kHz, MHz | Hz: Hertz; kHz: Kilohertz; MHz: Megahertz | 40Hz - 400Hz ( for 4V range only ) АМН? = 10%kHz = 10°H2 | 40Hz - 1kHz ( for 40V, 400V and 750V ranges only ) E | Note: Except for sine wave signal and triangular wave signal measurements, accuracy specifications for ac voltage measurements do not apply to measurements of signals whose frequencies are > 200Hz. GENERAL SPECIFICATION Reading: True rms Max. Allowable Input Voltage: 750V Display: 3 3/4 digits LCD, 3999 counts Overrange Indication: "OL" shown on the display Note: When the voltage being measured is > 750V, the built-in buzzer will sound. When the Negative Polarity Indication: Negative sign " — " shown on the display automatically voltage is > 760V, " OL" will be shown on the display Sampling Rate: About 2 to 3 times/sec Battery: 9V battery, 6F22 or equivalent, 1 piece Low Battery Indication: " E=]" shown on the display DC Voltage IP Degree: 1P20 = —— ; — Range | Resolution Accuracy — Operating Altitude: 0 to 2000 meters 400mV | 0 1mV (0,7% + 3) Operating Environment: Temperature: 0°C to 40°C, Relative Humidity: < 75% | av 0.001V _+(0.5% +2) __ | | , 40V 0.01V Temperature Coefficient: 0.1 x (specified accuracy)/°C (< 18°C or > 28°C) 400V | 0.1V + (0.7% + 3) Storage Environment: Temperature: -10°C to 50°C 1000V | ПУ | Relative Humidity: < 85% Input Impedance: About 10MQ Size: 185mm X 88mm X 62mm Max. Allowable Input Voltage: 1000V Weight: About 393g ( including battery and holster ) Input Impedance: About 10MQ Max. Allowable Input Current: Max. Allowable Input Voltage: 1000V "mA vA "terminal: 400mA Note: " 10A "terminal: 10A ( For inputs > 2A: duration < 10 secs, interval > 15 minutes ) 1. In 400mV range, the display may show an unstable reading before the test leads are Note: connected to the circuit to be tested. This is normal and will not affect measurements. When the current being measured is > 10A, the built-in buzzer will sound. When the 2. When the voltage being measured is 2 1000V, the built-in buzzer will sound. When the voltage 1$ > 1010V, * OL" will be shown on the display. current is > 10.10A, " OL” will be shown on the display. Resistance AC Current _ | _ Range | Resolution Accuracy Range | Resolution | Accuracy 4000 0.10 + (1.0% + 2) М! 4000pA | A AN 0.001kQ 40mA 0.01mA + (1.2% + 5) 40kO 0.01kQ + (0.8% + 2) _400mA | — 0.1тА a 4000 _ 0.1kQ ___10A OA Y (2.0% + 5) 4MQ 0.001MQ | +(12%+2) Overload Protection: 40MQ _ 0.01MQ + (1.5% + 5) SUUMA/250V Fast fuse ( for protection for " mA pA " terminal inputs ) 10A/250V Fast fuse ( for protection for" 10A " terminal inputs) [1] measured value = displayed measurement reading residual reading with the test leads Max. Allowable Input Current: shorted "mA pA " terminal: 400mA -10A terminal: 10A ( For inputs > 2A: duration < 10 secs, interval > 15 minutes ) Frequency Range: 40Hz - 1kHz ( Note: Except for sine Capacitance wave signal and triangular wave signal measurements, A _ accuracy specifications for ac current measurements Range Resolution Accuracy do not apply to measurements of signals whose 4nF _ 0.004пЕ frequencies are > 200Hz. ) 40nF 0.01nF + (4.0% + 10) Reading: True rms -400nF 0.1nF Note: | AUF 0.001u F When the current being measured is = 10A, the built-in buzzer will sound. When the 40uF 0.01 ur + (3.5% + 10) current is > 10.10A, "OL" will be shown on the display. 400uF 0.1uF 7 4mF — 0.001mF + (4.0% + 10) + о DC Current 40mF 0.01mF + 10.0% a sin Note: Range IO dictada В For capacitance measurements, range change is automatic. 400pA 0.1рА 4000рА 1uA o 40mA 0.01mA EN ER. te — Transistor hFE Test 10A 0.01A + (1.5% + 5) | Overload Protection: 500mA/250V Fast fuse ( for protection for " mA pA " terminal inputs ) 104/250V Fast fuse ( for protection for " 10A " terminal inputs) Range _ hFE Test Current | Test Voltage РМР & МРМ| O- 1000 lb = 10рА Усе = 1.6V Frequency Range | Resolution Accuracy M 9.999Hz | 0.001Hz u 99.99Hz 0.01Hz 999.9Hz | 0.1Н2 9.999kHz | 0.001kHz | +(0.5% +5) 99.99KHz 0.01kHz 999.9kHz 0.1kHz _ 9.999MHz | 0.001MHz | __ Required Input Voltage: 1V rms - 20V rms Note: For frequency measurements, range change is automatic. Diode and Continuity Test |Range| Description Remark The approximate forward la Open Cir Ebo voltage drop of the diode ais de about 4V under test is displayed. The built-in buzzer will sound if the resistance is less than | | about 500. | | The buzzer may or may not )) sound if the resistance is between 500 and 1500. Open Circuit Voltage: about 2.1V The buzzer will not sound if | the resistance is more than | about 1500. OPERATING INSTRUCTION Data Hold Mode Briefly press the " Ш " button to enter Data Hold mode. The present reading is held on the display, and the symbol " H - appears on the display as an indicator. To exit Data Hold mode, briefly press this " @ " button again. The symbol " H “ disappears. Note: The non-contact ac voltage detection function does not have Data Hold mode. Using Relative Mode Relative mode is available in voltage, current, capacitance and resistance functions. Selecting Relative mode causes the meter to store the present reading as a reference for subsequent measurements. 1. Set the meter in desired function and/or range. 2. Connect the meter to a desired circuit ( or object ) properly to get a reading, which is to be used as a reference for subsequent measurements. 3. Briefly press the " SEL/REL " button once. The meter enters the Relative mode and stores the present reading as a reference for subsequent measurements. The symbol " REL " appears as an indicator and the display reads zero. Note: When the display shows " OL", the meter can not enter the Relative mode. 4. In subsequent measurements, the display shows the difference between the reference and the new measurement. 5. To exit the Relative mode, briefly press the "SEL/REL" button again, The symbol " REL ” disappears. Note: 1. When the display shows " OL ”, it means overrange. 2. Except for capacitance function, the actual value of the object under test must not exceed the full-scale value of the present range when the meter is in Relative mode. 3. To avoid wrong measurement result, never enter Relative mode when Data Hold mode is active. Measuring DC Voltage „VOHeHz |, 1 Connect the black test lead to the "COM "terminal and the red test lead to the " »-ı . terminal. 2. Set the rotary switch in desired range position in the V= area. Note: If the magnitude of the voltage to be measured is not known beforehand, set the rotary switch to the highest range first and then reduce it range by range until satisfactory resolution is obtained. 3, Connect the test leads across the source or circuit to be tested. 4. Read the reading on the display. The polarity of the red lead connection will be indicated as well, Note: 1. In low range, before the test leads are connected to the circuit to be tested, the display may show an unstable reading. This is normal and will not affect measurements. 2. When the display shows " OL", it means overrange and you should select a higher range. 3. To avoid electric shock to you or damage to the meter, do not apply a voltage higher than 1000V dc between the terminals. 4. In any voltage measuring range, the input impedance of the meter is about 10MQ. This load effect may cause error when measuring high resistance circuit. The error can be ignored if the impedance of the circuit being measured is < 10kQ. Measuring AC Voltage 1. Connect the black test lead to the " COM " terminal and the red test lead to the " Sd En terminal. 2. Set the rotary switch in desired range position in the V~ area. Note: If the magnitude of the voltage to be measured is not known beforehand, set the rotary switch to the highest range first and then reduce it range by range until satisfactory resolution is obtained. 3. Connect the test leads across the source or circuit to be tested. 4. Read the reading on the display. Note: 1. In low range, before the test leads are connected to the circuit to be tested, the display may show an unstable reading. This is normal and will not affect measurements. 2. When the display shows " OL", it means overrange and you should select a higher range. 3. To avoid electric shock to you or damage to the meter, do not apply a voltage higher than 750V ac between the terminals. 4. In any voltage measuring range, the input impedance of the meter is about 10MQ. This load effect may cause error when measuring high resistance circuit. The error can be ignored if the impedance of the circuit being measured is < 10kQ. Measuring DC Current 1. Connect the black test lead to the " COM " terminal. If the current to be measured is less than 400mA, connect the red test lead to the " mA pA " terminal. If the current is between 400mA and 10A, connect the red test lead to the " 10A " terminal instead. 2. Set the rotary switch in desired range position in the A= area. Note: If the red test lead is connected to the " 10A " terminal, the rotary switch must be set in the " 10 ” position ( the 10A range position ) in theA= area. If the red test lead is connected to the "mA pA" terminal, never set the rotary switch in the " 10 " position. 3. Turn off power to the circuit to be tested. Then discharge all capacitors. Break the circuit path to be tested, and connect the test leads in series with the circuit. . Turn on power to the circuit, then read the reading on the display. The polarity of the red test lead connection will be indicated as well. Measuring AC Current 1. Connect the black test lead to the " COM " terminal. If the current to be measured is less than 400mA, connect the red test lead to the “mA pA " terminal. If the current is between 400mA and 10A, connect the red test lead to the " 10A ” terminal instead. 2. Set the rotary switch in desired range position in the A~ area. Note: If the red test lead is connected to the "10A" terminal, the rotary switch must be set in the " 10 " position ( the 10A range position ) in the A~ area. lf the red test lead is connected to the "mA pA" terminal, never set the rotary switch in the " 10" position. 3. Turn off power to the circuit to be tested. Then discharge all capacitors. 4. Break the circuit path to be tested, and connect the test leads in series with the circuit. 5. Turn on power to the circuit, then read the reading on the display. Measuring Resistance 1. Connect the black test lead to the " COM " terminal and the red test lead to the" ‘sear? " terminal. 2. Set the rotary switch in desired (2 range position. 3. Connect the test leads across the object to be tested. 4, Wait until the reading is stable, then read the reading on the display. Note: 1. For measurements > 1MQ, the meter may take a few seconds to stabilize reading. This is normal for high resistance measurements. 2. When the input is not connected, i.e. at open circuit, " OL" will be displayed as an overrange indication. 3 Before measurement, disconnect all power to the circult to be measured and discharge th HI 4. Make sure that the capacitor to be tested has been discharged thoroughly. Then all capacitors thorougnly. connect the test leads across the capacitor to be tested. Note: If the capacitor has polarity, the red test lead must be connected to the anode of Diode Test the capacitor and the black test lead must be connected to the cathode of the 0-е | 1 Connect the black test lead to the " COM ” terminal and the red test lead to the ” a nz capacitor. terminal. 9. Wait until the reading is stable, then read the reading on the display. 2. Set the rotary switch in pt) position. 3. If the display does not show the symbol ” LAN ", press the " SEL/REL " button until” >r Note: " appears on the display. When measuring a high-capacitance capacitor, it may take several seconds for the meter 4. Connect the red test lead to the anode of the diode to be tested and the black test lead to to complete measurement and stabilize reading. the cathode of the diode. 5. The display shows the approximate forward voltage drop of the diode. If the connections are reversed, " OL" will be shown on the display. Measuring Frequency | „ VOQAEHZ , 1 Connect the black test lead to the "COM " terminal and the red test lead to the © + Continuity Test terminal. 1. Connect the black test lead to the " COM " terminal and the red test lead to the " en 2. Set the rotary switch in the " T1QMHz" position. terminal. 3, Connect the test leads across the source or circuit to be tested. 2. Set the rotary switch in +!) position. 4. Read the reading on the display. 3. Press the " SEL/REL " button until the symbol ” N)" appears on the display. 4. Connect the test leads across the circuit to be tested. Note: 5. If the resistance is less than about 500. the built-in buzzer will sound. 1. The voltage of input signal should be between 1V rms and 20V rms. The higher the frequency of input signal, the higher the required input voltage. Note: 2. The frequency of input signal must be more than 1Hz. Before test, disconnect all power to the circuit to be tested and discharge all capacitors thoroughly. Transistor hFE Test Measuring Capacitance 1. Make sure that all the test leads have been removed from the meter. Then set the rotary 1. Connect the black test lead to the " COM " terminal and the red test lead to the " zum " switch in hFE position terminal. 2. Identify whether the transistor to be tested is NPN or PNP type and locate the emitter, 2. Set the rotary switch in the " 40MF " position. base and collector of the transistor. Insert the leads of the transistor into the proper DY 3. If the display does not read zero, briefly press the " SEL/REL " button to zero the display of the transistor test socket on the meter. the display will show the symbol" REL ”. 3. The display shows the approximate hFE value. Test Condition: Ib == 10yA; Усе *=1.0V Non-Contact AC Voltage Detection 1. Set the rotary switch т МСУ position. The display shows " EF " ( refer to Figure 3 ). 2. Move the center of the top of the meter where the NCV sensor is located ( see Figure 1 ) close to the object to be tested. When the meter detects electric field generated by ac voltage, the meter will indicate the intensity of the detected electric field. The intensity of detected electric field is indicated by the number of the bar segments at the vertical center of the display ( refer to Figure 4 ) and the beeping rate of the built-in buzzer. The higher the intensity of detected electric field, the larger the number of the bar segments on the display, and the faster the beeping rate of the buzzer. Е u Figure 3 Figure 4 Note: 1. Detection Range: 90V - 1000V Frequency Response: 50Hz/60Hz 2. The meter's electric field intensity indication is affected by the magnitude of the ac voltage of the conductor under test, the distance between the meter and the conductor, the insulation of the conductor, and etc. 3. Because of the meter's detection limit, a line ( or conductor) under test may be electrically live even if the meter does not indicate presence of electric field. 4. Before use, verify the meter's operation by detecting a known AC voltage. Do not use the meter if it operates abnormally or malfunctions. 9. To avoid electric shock, do not touch any conductor with hand or skin. Automatic Power-Off The meter will turn off automatically and go into Sleep mode if you have not operated the meter for about 15 minutes. To arouse the meter from Sleep, just press a button or turn the rotary switch. To disable the automatic power-off feature, turn the rotary switch from the * OFF " position to other switch setting while holding down the " SEL/REL ” button; the symbol * © " will be absent from the display. Additional Remarks After the meter is tumed on, the display shows all segments briefly and then the meter goes into normal measurement state. When you press a button, the meter will sound a beep if this press is effective. The meter will sound several short beeps about one minute before the meter turns off automatically and will sound a long beep before the meter turns off automatically. MAINTENANCE Warning Except replacing fuse and battery, never attempt to repair or service the meter. Store the meter in a dry place when not in use. Don't store it in an environment with intense electromagnetic field. General Maintenance Periodically wipe the case with a damp cloth. Do not use abrasive or solvent. Dirt or moisture in the terminals can affect readings. Clean the terminals as follows: 1. Turn off the meter and remove all the test leads from the meter. 2. Shake out any dirt which may exist in the terminals. 3. Soak a new swab with alcohol. 4. Work the swab around in each terminal. If the meter does not seem to work properly, check and replace ( as needed ) the battery and fuses and/or review this manual to verify correct operation. ACCESSORIES Manual: 1 piece Replacing the Battery and Fuse Test Lead: 1 pair Warning To avoid false readings, which could lead to possible electric shock or personal injury, replace the battery as soon as the low battery indicator ( [+=] ) appears. To prevent damage, electric shock or personal injury, install only replacement NOTE fuses specified. . In | | hange wi ice. Turn off the meter and remove the test leads before opening the battery cover or 1. This manual is subject to change without notice the case 2. Our company will not take the other responsibilities for any loss. 3. The contents of this manual can not be used as the reason to use the meter for any special application. When the low battery indicator (E ) appears on the display, the battery is low and must be replaced immediately. To replace the battery, remove the holster from the meter. Then remove the screws on the battery cover and remove the battery cover. Replace the exhausted battery with a new one of the same type. Reinstall the battery cover, the screws and the holster. To replace the fuse, remove the holster from the meter. Then remove the screws on the back cover and move the back cover aside gently. Replace the blown fuse with a new one of the same ratings. Reinstall the back cover, the screws and the holster. This meter uses two fuses: F1: Fuse, 500mA/250V, Fast action, @5X20mm F2: Fuse, 10A/250V, Fast action, M5 X20mm DISPOSAL OF THIS ARTICLE | Dear Customer, If you at some point intend to dispose of this article, then please keep in mind Please do not discharge it in the garbage bin, but check with your р | a local council | for recycling facilities in your area. ">

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