Midea DL334004 DIGITAL MULTIMETER User Manual

Midea DL334004 DIGITAL MULTIMETER

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 abnorma operating condition, the repair will be billed at a nominal cost.

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 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 111000V) and pollution degree 2.

Warning
To avoid possible electric shock or personal Injury, follow these guidelines

• 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.
• 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.
• 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 where explosive gas, vapor, or dust is present.
• 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, tum off circuit power before connecting the meter in the circuit.
• Remember to place the meter in series with the circuit.
• When servicing the meter, use only specified replacement parts.
• Use caution when working with voltage above 30V ac rms, 42V peak, or 60V de. 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 test lead.
• When you disconnect test leads, disconnect the live test lead first.
• Remove the test leads from the meter before you open the battery cover or the case.
• Do not operate the meter with the battery cover or portion of the case removed or loosened.
• 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.
• Do not use the meter if the meter or your hand is wet or if the environment is too wet.
• Do not touch any naked conductor with hand or skin.
• And do not ground yourself while using the meter
• Adhere to local and national safety codes.
• Individual protective equipment must be used to prevent shock and arc blast injury where hazardous live conductors are exposed.
• Use the meter only as specified in this manual; otherwise the safety features provided by the meter may be impaired.
• Remaining endangerment.
• When an input terminal is connected to dangerous live potential, it is to be noted that this potential can occur at all other terminals!
• CAT II  Measurement Category II is for measurements performed on circuits directly connected to low voltage installation. ( Examples are measurements on household appliances, portable tools and similar equipments.
• Do not use the meter for measurements with in Measurement Categories Ill and IV.

Caution
To avoid possible damage to the meter or to the equipment under test, follow these guidelines

• Disconnect circuit power and discharge all capacitors thoroughly before testing resistance, continuity, diode, capacitance, or transistor.
• Use the proper terminals, function and range for your measurements.
• Before current measurement, check the meter’s fuses.
• Before turning the rotary switch to change function, disconnect the test leads from the circuit under test.
• Remove all test leads from the meter before connecting transistor to the meter.

SYMBOLS

Alternating Current

Direct Current

::::::;

DC or AC

&: Caution, risk of danger, refer to the operating manual before use .Caution, risk of electric shock.

Earth (ground) Terminal

EI: El Fuse
CE :Conforms to European Union directives.

The equipment is protected throughout by double insulation or reinforced insulation.

FRONT PANEL

1. Display

2. 3 3/4 digits LCD display

3.  SEL/REL Button

4. This SEUREL button can be used to switch between diode and continuity test functions.

5. In voltage, current, capacitance or resistance function, this button can be used to enter/exit

6. Relative mode.

7. Rotary Switch

8. Used to select the desired function and/or range as well as to turn on or off the meter.

9. To save battery charge, set this rotary switch in the OFF position to turn off the meterwhen the meter is not in use.

10. 1 OA Terminal

11. Plug in connector for the red test lead for measuring current which is between 400mA and 10A.

12.  rnA μA  Terminal

13. Plug-in connector for the red test lead for measuring current which is less than 400mA.

14. COM  Terminal

15. Plug in connector for the black test lead.

16.  V+C+l lIlE +fz  Terminal

17. Plug-in connector for the red test lead for voltage, resistance, diode, continuity, capacitance and frequency measurements.

18. Transistor Test Socket

19.  CJ Button
    This CJ button can be used to enter/exit Data Hold mode. Hold down this button for about 2 secs to tum on or off the backlight. The backlight will turn off automatically after about 30 secs.

20. Holster

21. NCV Sensor

22. Used in non-contact ac voltage detection.

UNDERSTANDING THE DISPLAY

Explanations

1. Transistor hFE test function is selected.
2. RELThe meter is in Relative mode.

3. ))Continuity test function is selected.

4. Diode test function is selected.
5. AUTO :Autorange mode is selected.
6. The battery is low and must be replaced immediately.
7. CJ:The meter is in Data Hold mode.
8. DC:DC
9. Negative sign
10. AC: AC
11. The absolute value of the present reading is 30V. This icon is intended to remind you to use caution and avoid electric shock.
12. Automatic power-off feature is enabled.
13. NCV:The meter is in non-contact ac voltage detection function.

Units

GENERAL SPECIFICATION

• Display: 3 3/4 digits LCD, 3999 counts
• Overrange Indication: f l OL  shown on the display
• Negative Polarity Indication: Negative sign f l shown on the display automatically
• Sampling Rate: About 2 to 3 times/sec
• Battery: 9V battery, 6F22 or equivalent, 1 piece
• Low Battery Indication:shown on the display
• IP Degree: IP20
• Operating Altitude: O to 2000 meters
• Operating Environment: Temperature: 0° C to 40° C, Relative Humidity: < 75%
• Temperature Coefficient: 0.1 x specified accuracy/ °C < 18° C or> 28°C
• Storage Environment: Temperature: -10 ° C to 50°
• Relative Humidity: < 85%
• Size: 185mm X 88mm X 62mm
• Weight: About 393g (including battery and holster

SPECIFICATION

Accuracy is specified for a period of one year after calibration and at 18° C to 28°C, with relative hun1idity < 75%. Accuracy specifications take the form of : [% of Readlng]+[number of Least Significant Digits]

AC Voltage

• Input Impedance: About 1O MO
• Frequency Range:40Hz – 400Hz for 4V range only
• Accuracy:t (1.0% + 5)
• 40Hz – 1 kHz or 40V, 400V and 750V ranges only

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.

• Reading: True rms
• Max. Allowable Input Voltage: 750V

Note
When the voltage being measured is ;;?: 750V, the built-in buzzer will sound. When the voltage is > 760V, ” OL ” will be shown on the display.

DC voltage

40 V 400V
400V| 0.1V| ± (0.7% + 3)
1000V| 1V|

• Input Impedance: About 1O MO
• Max. Allowable Input Voltage: 1O OOV
• In 400mV range, the display may show an unstable reading before the test leads are connected to the circuit to be tested. This is normal and will not affect measurements.
• When the voltage being measured is ;;i: 1000V, the built-in buzzer will sound.
• When the voltage ls> 1010V,
• OL will be shown on the display.

AC Current

Range| Resolution

1µA

| Accuracy

± (1.2°/o + 5)

± (2.0% + 5)

---|---|---
4000µA
40mA

400mA

| 0.01mA

0.1mA

10A| 0.01A|

• Overload Protection: 500mA/250V Fast fuse for protection for mA μA  terminal inputs.
• 10A/250V Fast fuse for protection for 10 A terminal inputs
• Max. Allowable Input Current: mA μ A terminal: 400mA
• 10A terminal: 10A ( For inputs> 2A: duration< 10 secs, interval> 15 minutes)
• Frequency Range: 40Hz- 1kHz
• Note: Except for sine wave signal and triangular wave signal measurements, accuracy specifications for ac current measurements do not apply to measurements of signals whosefrequencies are > 200Hz.
• Reading: True rms

Note
When the current being measured is 1O A, the built-in buzzer will sound. When the current is > 10.1 OA,  OL will be shown on the display.

DC Current

±(1.0%+5)

4000µA| 1µA
40mA| 0.01mA
400mA| 0.1mA|
10A                     0.01A| ± (1.5% +5)

Overload Protection

500mA/250V Fast fuse  for protection for mAμ A terminal inputs 10A/250V Fast fuse  for protection for 10A terminal inputs.

Max Allowable Input Current

mA μA terminal: 400mA 1 OA  terminal: 1 OA For inputs > 2A: duration < 10 secs, interval > 15 minutes

Note
When the current being measured is OA, the built in buzzer will sound. When the current is > 10.1 OA,  OL will be shown on the display.

Resistance

± (0.8% + 2)

40k0| 0.01k0
400k0| 0.1k0
4MO| 0.001MO| ± (1.2% + 2)
40MO| 0.01MO| + (1.5% + 5)

11 measured value = displayed measurement reading residual reading with the test leads shorted.

Capacitance

± 4.0% +10

40nF

400nF

| 0.01 nF

0.1nF

4µF

40µF

| 0.001 µF

0.01 µF

| ****

± (3.5% + 10)

400µF| 0.1µF
4mF| 0.001mF| ± 4.0°/o + 10
40mF| 0.01 mF| | ± 10.0%

Note
For capacitance measurements, range change is automatic.

Transistor hFE Test

Frequency

Required Input Voltage: 1V rms – 20V rms
Note
For frequency measurements, range change is automatic.

Diode and Continuity Test

OPERATING INSTRUCTION

Data Hold Mode

Briefly press the ID  button to enter Data Hold mode. The present reading is held on the display, and the symbol  CJ  appears on the display as an indicator. To exit Data Hold mode, briefly press this  m  button again. The symbol CJ 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 n,eter 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.
4. The meter enters the Relative mode and stores the present reading as a reference for subsequent n,easurements.
5. The symbol  REL  appears as an indicator and the display reads zero.
6. When the display shows OL  the meter can not enter the Relative mode.
7. In subsequent measurements, the display shows the difference between the reference and the new measurement.
8. To exit the Relative mode, briefly press the SEL/REL button again. The symbol  REL disappears.

Note

1. When the display shows OLit 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

1. Connect the black test lead to the COM  terminal and the red test lead to the  t1- t H z  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. Connect the test leads across the source or circuit to be tested. The polarity of the red lead connection will be indicated as well.In low range. before the test leads are connected to the circuit to be tested, the display show an unstable reading. This is normal and will not affect measurements. When the display shows II OL “, it means overrange and you should select a higher range. To avoid electric shock to you or damage to the meter, do not apply a voltage higher than between the terminals.  In any voltage measuring range, the input impedance of the meter is about 10MO. 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 1 OkO.

Measuring AC Voltage

1. Connect the black test lead to the ” COM II terminal and the red test lead to the jf H z terminal.

2. Set the rotary switch in desired range position in the V- area.

3. 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.

4. Connect the test leads across the source or circuit to be tested.

5. Read the reading on the display.

6. 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.

7.  When the display shows II OL  it means overrange and you should select a higher range.

8. 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.

9. 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 1 OkQ.

Measuring DC Current

1. Connect the black test lead to the II COM II terminal. If the current to be measured is less than 400mA, connect the red test lead to the ” mA μA II 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.
3.  If the red test lead is connected to the 10A II terminal, the rotary switch must be set in the 10 position (the 1 OA range position in the area.
4. If the red test lead is connected to the II mA μA II terminal, never set the rotary switch in the 11 10 11 position.
5. Turn off power to the circuit to be tested. Then discharge all capacitors.
6. Break the circuit path to be tested, and connect the test leads in series with the circuit.
7. Turn on power to the circuit, then read the reading on the display.
8. 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 II terminal. If the current to be measured is less than 400mA, connect the red test lead to the II mA μA  terminal.
2. If the current is between 400mA and 1 OA, connect the red test lead to the 11 1 OA” terminal instead.
3. Set the rotary switch in desired range position in the A~ area.
4. If the red test lead is connected to the 11 10A II terminal, the rotary switch must be set in the 11 1 O II position the 1 OA range position in the A~ area.
5. If the red test lead is connected to the II mA μA II terminal, never set the rotary switch in the 11 10 11 position.
6. Turn off power to the circuit to be tested. Then discharge all capacitors.
7. Break the circuit path to be tested, and connect the test leads in series with the circuit.
8. Turn on power to the circuit, then read the reading on the display.

Measuring Resistance

1. Connect the black test lead to the II COM II terminal and the red test lead to the 11 jf Hz terminal.
2. Set the rotary switch in desired O 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.
5. For measurements > 1 MO, the meter may take a few seconds to stabilize reading.
6. This is normal for high resistance measurements.
7. When the input is not connected, i.e. at open circuit OL will be displayed as an overrange indication.
8. Before measurement, disconnect all power to the circuit to be measured and discharge all capacitors thoroughly.

Diode Test

1. Connect the black test lead to the  COM  terminal and the red test lead to the jf H z terminal.

2. Set the rotary switch in position.

3. If the display does not show the symbol press the SELi REL button until  appears on the display.

4. Connect the red test lead to the anode of the diode to be tested and the black test lead to the cathode of the diode.
   5. The display shows the approximate forward voltage drop of the diode.

5. If the connections are reversed OL will be shown on the display.

Continuity Test

1. Connect the black test lead to the II COM II terminal and the red test lead to the 11 -jf Hz  terminal.
2. Set the rotary switch in  position.
3. Press the SEL/REL  button until the symbol  J appears on the display.
4. Connect the test leads across the circuit to be tested.
5. If the resistance is less than about 500, the built-in buzzer will sound.

Note
Before test, disconnect all power to the circuit to be tested and discharge all capacitors thoroughly.

Measuring Capacitance

1. Connect the black test lead to the ” COM II terminal and the red test lead to the 11  Hz terminal.
2. Set the rotary switch in the “40mF II position.
3.  If the display does not read zero, briefly press the II SEL/REL II button to zero the display the display will show the symbolREL.
4. Make sure that the capacitor to be tested has been discharged thoroughly.
5. Then 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 the capacitor and the black test lead must be connected to the cathode of the
capacitor. Wait until the reading is stable, then read the reading on the display. When measuring a high-capacitance capacitor, it may take several seconds for the meter
to complete measurement and stabilize reading.

Measuring Frequency

I d h II VO-if-Hz 11 1. Connect the black test lead to the  COM terminal and the red test  to terminal. Set the rotary switch in the 11 10MHz II position. Connect the test leads across the source or circuit to be tested. Read the reading on the display.

Note

1. The voltage of input signal should be between 1 V rms and 20V rms. The higher the frequency of input signal, the higher the required input voltage.
2. The frequency of input signal must be more than 1 Hz.

Transistor hFE Test

1. Make sure that all the test leads have been removed from the meter.
2. Then set the rotary switch in hFE position.
3. Identify whether the transistor to be tested is NPN or PNP type and locate the en1itter, base and collector of the transistor.
4. Insert the leads of the transistor into the proper h°J/ of the transistor test socket on the meter.
5. The display shows the approximate hFE value.
6. Test Condition: lb 10 μA; Vee 1.6V

Non Contact AC Voltage Detection

1. Set the rotary switch in NCV position.
2. The display shows  EF.
3. Move the center of the top of the meter where the NCV sensor is located close to the object to be tested.
4. When the meter detects electric field generated by ac voltage, the meter will indicate the intensity of the detected electric field.
5. The intensity of detected electric field is indicated by the number of the bar segments at the vertical center of the display and the beeping rate of the built in buzzer.
6. 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.

Note
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. Because of the meter’s detection limit, a line  or conductor under test may beelectrically live even if the meter does not indicate presence of electric field. Before use, verify the meter’s operation by detecting a known AC voltage. Do not use the meter if it operates abnormally or malfunctions. 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 tum the rotary switch. To disable the automatic power off feature, turn the rotary switch from the OFF I I position to other switch setting while holding down the I SEUREL button; the symbol e  will be absent from the display.

Additional Remarks

After the n,eter is turned 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. Then enter 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.
5. 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.

Replacing the Battery and Fuse

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 fuses specified. Turn off the meter and remove the test leads before opening the battery cover or the case. When the low battery indicator l 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, 05X20mm
• F2: Fuse, 10A/250V, Fast action, 05X20mm

ACCESSORIES

• Manual: 1 piece
• Test Lead: 1 pair

NOTE

1. This n1anual is subject to change without notice.
2. Our company will not take the other responsibilities for any loss.
3. The contents can not be used as the reason to use the meter for any special application.

DISPOSAL OF THIS ARTICLE
If you at some point intend to dispose of this article, then please keep in mind that many of its components consist of valuable materials, which can be recycled. Please do not discharge it in the garbage bin, but check with your local council for recycling facilities in your area.

Read User Manual Online (PDF format)

Read User Manual Online (PDF format)  >>

Download This Manual (PDF format)

Download this manual  >>