MAXWELL 25313 Digital Multimeter User Manual

MAXWELL 25313 Digital Multimeter

Product Information

The NCV DC Digital Multimeter is an automatic measurement device that can measure various parameters such as DC voltage, AC voltage, DC current, AC current, resistance, frequency, and capacitance. It features a True RMS function for accurate measurements and a transistor test for checking hFE. The device also has a non-contact voltage (NCV) detection feature, allowing users to detect voltage without breaking the wiring. With its durable housing, it can be used in any conditions.
The multimeter is powered by 1 x 9V battery and has a compact size of 200 x 92 x 60 mm.

Product Usage Instructions

Voltage Measurement:

1. Turn on the multimeter by pressing the power button.
2. Select the voltage measurement mode using the FUNC selector.
3. Connect the black test lead to the COM jack and the red test lead to the V jack.
4. Select the type of voltage to be measured (DC or AC) using the RANGE selector.
5. Place the sensor on the top of the device near the wiring to detect voltage without breaking it.
6. Read the measured voltage value on the display.

Resistance Measurement:

1. Turn on the multimeter by pressing the power button.
2. Select the resistance measurement mode using the FUNC selector.
3. Connect the black test lead to the COM jack and the red test lead to the Ω jack.
4. Place the test leads across the resistor to be measured.
5. Wait for a stable measurement value to be displayed on the screen.
6. Read the measured resistance value on the display.

Frequency Measurement:

1. Turn on the multimeter by pressing the power button.
2. Select the frequency measurement mode using the FUNC selector.
3. Connect the black test lead to the COM jack and the red test lead to the Hz/% jack.
4. Select the desired frequency range using the RANGE selector.
5. Place the test leads across the circuit or component to be measured.
6. Read the measured frequency value on the display.

Capacity Measurement:

1. Turn on the multimeter by pressing the power button.
2. Select the capacitance measurement mode using the FUNC selector.
3. Connect the black test lead to the COM jack and the red test lead to the nF/μF/mF jack.
4. Select the desired capacitance range using the RANGE selector.
5. Place the test leads across the capacitor to be measured.
6. Read the measured capacitance value on the display.
   Note: Always follow safety precautions and refer to the user manual for detailed instructions before using the NCV DC Digital Multimeter.

INTRODUCTION

• Are you one of those people who look for the best quality in all circumstances? Our multimeters are made for you! With this professional multimeter you can make accurate measurements, whether it is measuring voltage, current, resistance, capacitance or transistors.The measurement results are displayed in a large size, with sharp contrast and backlight, so they are easy to read even in poor lighting conditions.
• By using the automatic measurement limit function, you can easily and quickly get excellent measurement results. This means that you do not have to worry about setting the appropriate measurement limits, the device automatically selects the appropriate one. This can make your work much more efficient, but at the same time, if necessary, it is also possible to modify the measurement limits manually. With the help of the sensor on the top of the device, you can detect voltage without breaking the wiring. Its durable device housing ensures problem-free use in all conditions.

General technical parameters

Relative measuring

mode

| ✓
Diode test| ✓
Continuity test| ✓
NCV| ✓
Phase test| ✓
Data hold| ✓
Maximum/Minimum| ✓
Auto off

Backlight

Sound signal

Worklight

Power source

Size

| ✓

✓

✓

✓

1 x 9 V batteries

200 x 92 x 60 mm

Safety information

Before use, make sure that all accessories are in the package and undamaged. The meter is designed in accordance with IEC61010 (a safety standard issued by the International Electrotechnical Commission or equivalent GB4793.1). Please read the safety notes before use.

When using the device, the user must pay attention to the following safety regulations:

• Protect yourself from electric shock!
• Protect the device from damage caused by improper use!
• Before using the accessories supplied with the device (measuring cord, measuring probe), check whether they are in good condition! Never use damaged test leads!
• If you use the device next to a device that generates a source of interference, expect that the measurement may show incorrect results or nothing will appear on the display.
• Use the device only for the purposes specified in the user manual! Incorrect operation does not guarantee the continued correct operation of the product.
• Never use the device near explosive or flammable gases or dusts!
• Before measuring, check the device to ensure that it is in the correct measuring position and that the measuring leads are connected properly. Do this before each measurement!
• If the measurement result is not known, always start measuring in the largest measuring range and then work backwards.
• To protect the device, never exceed the maximum input values!
• Be careful when measuring above 60 V direct or 30 V alternating voltage! These voltages can cause electric shock.
• When using a probe, make sure that your fingers do not touch the metal surface of the probe and always place it behind the finger guard.
• When changing measurement modes or levels, remove the test leads from the test object or circuit.
• When measuring resistance, continuity or diode, always make sure that the meter is not connected to a live circuit and that all high-capacity capacitors are discharged.
• Before measuring current, before connecting the device to the circuit, de-energize it.
• Replace the battery when the low battery voltage icon appears on the display.
• Always remove the test leads from the circuit and the multimeter before opening the device.
• If you experience any abnormal behavior during operation, stop the measurement and turn off the device.
• If you do not use the device for a long time, remove the battery from it and do not store it in a place with high temperature or high humidity.
• To avoid fire and other damage, always replace the fuse with the same parameter: F 200 mA / 250 V, F 10 A / 250 V.
• Never use the device if the rear battery compartment cover is open or not properly attached to its place!

Safety symbols

Properties

• LCD display: Maximum value display: 9999;
• Polarity display: automatic positive and negative polarity indication
• Out of range signal: „OL”
• Low battery indication: Indicates that the battery level is low, the battery required for the operation of the device needs to be charged or replaced.
• Automatic shutdown: If there is no operation for 5 minutes, the instrument switches off automatically, thus protecting the battery charge

External structure

1. NCV non-contact measurement
2. LCD display: 22 mm character height
3. NCV signal light
4. FUNC: Function selector
5. REL: Relative measurement mode
6. MIN / MAX: Measured value
7. RANGE: Measuring range
8. Hz / %: Frequency mode / Duty cycle
9. Data hold on display
10. Backlight on/off
11. Function selection rotary switch
12. Input plugs

SPECIFICATION

DC voltage

AC voltage

DC current

AC current

Resistance

Diode and continuity test

Frequency measurement

Capacity measurement

Functions

• FUNC button: After selecting the main function on the rotary switch, it is possible to switch between the individual measurement modes. You can switch between DC and AC in voltage measurement mode. In tensile test mode , you can measure resistance, tensile, capacitance, and diode measurement.
• During temperature measurement °C or °F
• REL button: Relative measurement mode
• MIN / MAX button: Minimum and maximum values measured during the measurement.
• RANGE button: Switch to manual measurement limit mode
• HZ / % button: Switch between frequency and duty cycle measurement. (AC mode)
• HOLD button: Measured value data hold. Press the button again to exit the data hold mode.

HOLD Button
Data hold function. By pressing briefly, the currently measured value is recorded on the display. With the second press, we can return to the measurement mode.

Button

• Turn backlight on/off. By pressing the button, the backlight can be turned on and remains on for ~30 seconds, while the measurement result can be safely read. In order to protect the battery that ensures the long-term operation of the device, the backlight turns off automatically.
• Attention: For battery with low energy level, this function does not work for energy saving reasons.

Measurement

Voltage measurement

• Set the function selector switch mode.
• By pressing the FUNC key, select the type of voltage to be measured (DC or AC voltage).
• Connect the black test lead to the COM jack and the red test lead to the jack.
• Connect the other end of the test leads to the circuit or source to be measured.
• Read the measured value from the display. The polarity of the red test lead is shown on the display when measuring DC voltage (only the negative sign).
• ATTENTION: If you are not sure of the approximate value of the measured value, set the instrument to the maximum measurement limit. To avoid electric shock and damage to the device, never exceed the 1000 V DC or 750 V AC RMS voltage limit!

Resistance measurement

•  Set the function selector switch to the position.
• Connect the black test lead to the COM jack and the red test lead to the jack.
• Connect the test leads to the two terminals of the resistor.
• Read the measured value from the display.
• Note: In the measurement range of 10 MΩ, the device needs a few seconds for a stable measurement.
• If the measured circuit exceeds the maximum measurement limit, the display shows OL.
• ATTENTION: If you are not sure of the approximate value of the measured value, then set the instrument to the maximum measurement limit or automatic measurement limit mode. In order to avoid damage to the device or electric shock, cut off the external power source of the circuit to be measured, or turn off the high-power capacitors!

Continuity, tensile test

• Set the function selector to position.
• Press the FUNC button to select the function.
• Connect the black test lead to COM and the red test lead to .
• Connect the other ends of the test leads to the circuit under test. If the resistance between the two points is less than 30 Ω, the device indicates this with a beeping sound.
• Note: the continuity test is also good for looking at the open/closed state of a circuit.
• ATTENTION: In order to avoid damage to the device or electric shock, cut off the external power source of the circuit to be measured, or turn off the high-power capacitors!

Diode measurement

• Set the function selector to  position.
• Press the FUNC button to select the function.
• Connect the black test lead to COM, and the red test lead to jack.
• Touch the red lead to the diode’s anode and the black lead to its cathode.
• The opening voltage of the diode will be read on the display. If the polarity is accidentally reversed, the OL icon will appear on the display.
• ATTENTION: In order to avoid damage to the device or electric shock, cut off the external power source of the circuit to be measured, or turn off the high-power capacitors!

Current measurement

• Set the function selector switch to mode depending on the measurement limit.
• Select the type of current to be measured (direct current or alternating current) by pressing the FUNC key.
• Turn off the power supply to the circuit to be measured.
• Discharge any high capacity capacitors.
• Connect the black test lead wire to the COM socket and the red to the mA terminal max. up to 600mA measurement limit, or for A the max. For 10A measurement limit.
• Connect the multimeter in series to the circuit.
• Read the measured value from the display. In the case of DC measurement, the polarity of the red cable is also shown on the display (only the negative sign).
• If the display shows OL and the device beeps continuously, switch to a higher measurement limit.
• ATTENTION: If you are not sure of the approximate value of the measured value, then set the instrument to the maximum or automatic measurement limit. To avoid damage to the device, check the condition of the fuse before measuring! Always use the specified dimensions and values! When measuring current, do not connect the instrument leads in parallel to the circuit, as this can lead to circuit and instrument failure.

Frequency measurement

• Set the function switch to HZ. Connect the test leads to the COM and V sockets. Connect the test leads to the signal source to be measured.
• Note:
  • Do not measure frequency at a voltage higher than 250 V(RMS)..
  • In noisy environments, it is advisable to use a shielded cable when measuring small signals.
  • Avoid touching the circuit when measuring at high voltage.

Duty cycle measurement %
Set the function switch to Hz, then press the FUNC button once to measure the duty cycle. Connect the instrument cable to the COM and sockets and then to the signal source to be measured.

Capacity measurement

• Set the function switch to the capacity function.
• Press the FUNC button to select the function.
• Place the test lead in the socket and the black one in the COM socket. Connect the test leads to the capacitor to be measured.
• Before measuring capacity, discharge the capacitor to be measured. Measuring mF capacitors can take several seconds.
• Note: It is normal if the small value of the capacitance does not return zero, in order to obtain an accurate value, the readings must be subtracted during the measurement.

Temperature measurement

• Set the function switch to the °C / °F position. Press the FUNC key to select the measurement unit. Connect the black banana plug of the thermometer to the COM socket and the red one to the V socket. Touch the measuring tip to the surface to be measured.
• Attention: when measuring hot objects, the thermometer probe can also overheat, in order to avoid burns, perform the measurement carefully.

MIN/MAX data hold

• Press briefly to store and display the minimum or maximum measurement value.
• Long press exits the function.

REL – relative measurement mode

• For relative measurement mode, press the REL button briefly until a beep sounds to indicate that the function is on.
• The instrument holds the measured value when you press the button (this is called the initial value).
• Measure with the instrument. Then the value on the display will be the sum of the two values.
• Press the button again to return to normal measurement mode.
• This function does not work in frequency measurement mode.

NCV (Non-Contact-Voltage) – Non-contact voltage search

• Set the function selector to the NCV position.
• Bring the top of the instrument (the part above the display) close to the wire to be tested.
• When voltage is present, the instrument indicates it by intermittent beeping and flashing of the LED.

Maintenance, cleaning

1. This is a factory-calibrated, accurate meter. Do not disassemble the device or attempt to modify the electrical circuit. Make sure the measuring instrument is water-, dust-, and shatter-proof.
2. Please do not store or use in high temperature, high humidity, fire or strong magnetic environment.
3. Please wipe the meter with a damp cloth and mild detergent, and do not use abrasive and drastic solvents such as alcohol.
4. If you do not use it for a long time, please remove the battery to avoid leakage. (Can only be performed by a specialist)
5. When replacing the fuse, use another fuse of the same type and specification. (Can only be performed by a specialist)

Troubleshooting

• If the meter does not work properly, check the battery level and if the problem persists, contact the service center or dealer.
• The manufacturer and distributor assumes no responsibility for damages resulting from improper, unprofessional use.

Disposal (Electric device)

• Valid in the European Union and all other European states that participate in selective collection
• According to directives 2012/19/EU, electrical waste and devices cannot be thrown away as household waste.
• Old appliances must be collected in order to maximize the recycling of raw materials, thereby reducing their impact on people’s health and the environment.
• The crossed-out bin symbol is on all products for which separate collection is mandatory. Consumers should check with their local authorities for more information.

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