MX-25401 - Multimeter Maxwell - Free user manual and instructions

Product Type	Digital Multimeter (Pen Style)
Brand	Maxwell
Model	MX-25401
Display	3 1/2 digit LCD (1999 counts)
DC Voltage Range	200 mV to 600 V
AC Voltage Range	2 V to 600 V
DC Current Range	20 mA to 200 mA
AC Current Range	20 mA to 200 mA
Resistance Range	200 Ω to 20 MΩ
Diode Test	Yes
Continuity Test	Yes (beeps if resistance < 30 Ω)
Additional Functions	Data Hold, Auto Power Off, LED Lamp
Power Supply	1 x CR2032 battery
Dimensions (HxWxD)	155 x 55 x 26 mm
Weight	130 g (with battery)
Safety Rating	CAT II 600 V
Fuse Protection	F250 mA/250 V (5x20 mm)
Operating Temperature	5 °C to 40 °C
Storage Temperature	-20 °C to 60 °C
Relative Humidity (operating)	0% – 90% (0 °C – 35 °C); 0% – 70% (35 °C – 50 °C)
Auto Power Off	After 15 minutes of inactivity
Sampling Rate	Approximately 1 per second
Accessories Included	1 x CR2032 battery, user manual
Warranty	Not specified in manual

Frequently Asked Questions - MX-25401 Maxwell

How do I measure DC voltage with the MX-25401?

Set the function switch to the V position, then press SELECT to choose DC mode. Connect the red test lead to the positive side and the black lead to negative. The display shows the voltage and polarity. Max input is 600 V DC.

Can I measure AC voltage with this multimeter?

Yes. Turn the function switch to V, press SELECT to choose AC mode. Connect the probes across the source. The display shows the AC voltage (RMS). Frequency range is 40-400 Hz, max 600 V AC.

How do I measure current?

Set the function switch to mA, press SELECT to choose DC or AC. Connect the meter in series with the circuit. Maximum current is 200 mA; exceeding this blows the internal fuse.

How do I test continuity?

Turn the function switch to the Ω/•))) position. Press SELECT until the continuity symbol appears. Connect probes to the circuit. If resistance is below 30 Ω, the meter beeps.

What battery does the MX-25401 use and how do I replace it?

It uses one CR2032 battery. To replace, remove the screw on the battery cover, take out the old battery, insert new one with correct polarity, and replace the cover.

Why does the display show 'OL'?

OL stands for overload or open circuit. It appears when the measured value exceeds the selected range or when the circuit is open (e.g., resistance measurement with no connection).

How does the auto power off work?

If the meter is idle for about 15 minutes, it automatically turns off to save battery. To wake it, press the HOLD button or rotate the function switch.

How do I use the LED lamp?

Press and hold the button with the lamp symbol (→) for more than 2 seconds to turn on the LED lamp. Press and hold again to turn it off. It auto-shuts after 15 seconds.

What safety precautions should I take when measuring high voltage?

Always use the correct range and mode. Do not measure above 600 V. Inspect leads for damage. Connect the common lead first. Keep fingers behind the probe guards. Be especially careful above 30 V AC RMS or 60 V DC.

How do I replace the fuse?

Turn off the meter and remove the battery cover (screw A and cover B). Remove screws D, then the back cover. Locate the fuse (E) and replace with F250 mA/250 V (5x20 mm) fuse. Reassemble.

USER MANUAL MX-25401 Maxwell

DIGITAL MULTIMETER PEN STYLE WITH LED LAMPDIGITAL-MULTIMETER

DIGITALES MULTIMETER MIT LED-LAMPE

DIGITÁLIS MULTIMÉTER LED LÁMPÁVAL

DIGITÁLNÍ MULTIMETR S LED LAMPOU

DIGITÁLNY MULTIMETER S LED LAMPOU

MULTIMETR CYFROWY Z LAMPA LEDDIGITÁLNY

MULTIMETRU DIGITAL CU LED

25401

EN USER MANUAL

To avoid electric shock and other injury please pay attention to the following:

• Do not use the device if it is damaged. Check the cover of the device before use. Pay extra attention to the insulation near the connectors.
• Check the connecting cables, their insulation. If the cables or the connectors are defective, replace them or do not use the device.
• Do not use the device if it operates improperly. If you have doubts, take the device to a service station.
• Do not use the device near explosive materials (gases, vapors, powders)
• Do not measure higher voltage on the device than indicated, not between the measuring connectors or between one of them and the earthing.
• Verify the operation of the device before usage by measuring a known voltage.
• When measuring current, turn off the device before connecting it to the circuit. Make sure that the device is connected to the measured circuit serially.
• Only use the designated spare parts to repair the device.
• When measuring above 30 V AC RMS, 42 V peak, or 60 V DC voltage pay extra attention, because there is a risk of electric shock.
• When measuring, connect the measuring pin on the wire first, and then the one on the device to the circuit.
• Do not use the device if the battery container lid or any part of the cover is missing.
• To avoid incorrect measuring results, electric shock and injury, replace the batteries right after the low battery symbol is lit on the display.

Further risks: If any of the measuring points are connected to a dangerous voltage, this voltage may appear on the other measuring pin as well.

WARNING!

To avoid damage to the device or the measured circuit, please note the following:

• Disconnect the power cord and discharge the high capacity capacitors before measuring resistance, diode or continuity.
• Use the proper mode and threshold for measurement.
• Before measuring current always check the fuses and turn off the measured circuit before connecting the device to it.
• Remove the device from the measured circuit before changing measuring mode with the switch.
• Remove the device from the measured circuit before taking off the cover.

GENERAL DESCRIPTION

The MP-25 401 is a small size 3 1/2 digit automatic threshold switching digital multimeter which enables measuring constant and alternating voltages, alternate and direct currents, resistance, diode and circuit continuity.

The device has the following functions:

• Automatic nullification
- Polarity display
- Holding the measured data
- Overload display
• Automatic off switch
- Lamp function

ELECTRIC SYMBOLS

	AC (alternate current)
	DC (direct current)
	Important security information. Read the manual.
	Dangerous voltage
	Earthing
	Fuse
	Complies to EU directives
	Double isolation
	Low batter power
	Diode

SPECIAL SYMBOLS ON THE DISPLAY

For security reasons, the following are displayed on the device:

600V MAX	To avoid electric shock and damage to the device, do not connect voltage bigger than 600V between the measuring pins.
	General danger indication. Follow the instructions in the manual.
600 V DC 600 V AC 200 mA MAX	The max. amount of the voltage measurable by the device is 600V DC or 600VAC. The max. measurable current is 200mA DC or AC.
	When measuring high voltage always take special care. Do not touch any measuring pins by hand.
	Double isolation

CHARACTERISTICS

Display	3 ^1/2 digit LCD display(1999)
Polarity	automatic polarity display
Overload signal "OL" on the screen
Operating temperature threshold	5 °C – 40 °C
Power supply	CR2032 type battery (1 piece)
Depleted battery signal Yes
Measures 155 x 55 x 26 mm
Storage temperature -20 °C – 60 °C
Sampling rate	approximately 1 every second
Weight	130 g (with battery)

DIGITAL DISPLAY RESPONSE TIME

VAC 2 sec
VDC 1 sec
0Ω<200kΩ 1 sec
200kΩ<2MΩ 2 sec
2MΩ<20MΩ) 5 sec

RELATIVE HUMIDITY RANGE

all ranges except 20 MΩ	0% – 90% (0 °C – 35 °C)
	0% – 70% (35 °C – 50 °C)
20 MΩ range	0% – 80% (0 °C – 35 °C)
	0% – 70% (35°C – 50 °C)

SPECIFICATIONS

Measuring precision is valid for one year from the time of calibration under 23^ C ( ±5^ C) temperature and max. 75% of relative humidity.

Function Range Precision
D+V+D1	200 mV ±(0,5% + 2)
	2 V-20 V-200 V	±(0,7% + 2)
	600 V	±(0,8% + 2)
I+I+I1	2 V	±(0,8% + 3)
	20 V-200 V	±(1,2% + 3)
	600 V	±(1,5% + 3)

Ω	200 Ω	±(1,2% + 3)
	2 kΩ, 20 kΩ, 200 kΩ, 2 MΩ	±(1,0% + 2)
	20 MΩ	±(2,0% + 2)
	Voltage~ 0,5 V;Current ~ 0,5 mA
	20 mA	±(1,2% + 3)
	200 mA
	20 mA	±(1,5% + 5)
	200 mA
	If the resistance is < 30 Ω, the device will beep

THE FRONT PANEL

1. Display: 3 1/2 digit LCD (1999)
2. Function switch: A switch that selects the different function modes or thresholds. To ensure a long battery life, turn off the device when not used.
3. "SELECT" button: To choose between AC and DC voltage, or resistance/diode/continuity modes.
4. "HOLD" button: By pressing this button the measured result on the screen is held. You can continue measuring with another press of this button. This button also starts the device when it is in standby mode.
5. "→" button: To select the lamp function, hold this button down for more than 2 seconds. Do the same for turning it off. If you do not press the buttons, the lamp will turn off after 15 seconds.
6. Measuring pin: The inward measuring point for measuring voltage, current (<200mA), resistance, and diode. (positive)
7. Measuring cable: Measuring earth (negative)

THE DISPLAY

1. Continuity measurement display

2. Diode measurement display

3. Automatic treshold display

4. Direct voltage measurement display

5. Alternate voltage measurement display

6. Hold function display

7. Low battery power display

8. Resistance measurement display

9. Current unit display

10. Voltage unit display

USAGE INSTRUCTIONS

Measuring direct voltage

• Set the function switch to the "V" position.
• Press the "SELECT" button to switch to "DC" mode.
• Connect the measuring wire and the measuring pin to the measured voltage.
• The display shows the measured value with the pin's polarity.

Note: Inward impedance: app.: 10 MΩ The maximum measurable voltage is 600 V

Measuring alternate voltage

• Set the function switch to the "V" position. Press the "SELECT" button to switch to "AC" mode.
• Connect the measuring wire and the measuring pin to the measured voltage.
  • The display shows the measured value.

Note: Inward impedance: app.: 10 MΩ

Frequency range: 40 Hz – 400 Hz

Max. measurable voltage: 600 V

Measuring direct current

• Set the function switch to "mA" position.
• Press the "SELECT" button to switch to "DC" mode.
• Connect the measuring wire and the measuring pin to the measured current serially.
• The display shows the measured value with the pin's polarity.

Note: Max. measurable current is 200 mA, if measuring a higher current the built-in fuse will melt.

Measuring alternate current

• Set the function switch to "mA" position.
• Press the "SELECT" button to switch to "AC" mode.
• Connect the measuring wire and the measuring pin to the measured current serially.
  • The display shows the measured value.

Note: Max. measurable current is 200 mA, if measuring a higher current the built-in fuse will melt.

Measuring resistance

• Set the function switch to the "Ω •") / ▶ position.
• Connect the measuring wire and the measuring pin to the measured resistor, the measured value is displayed on the screen.

Note:

• If the resistance is greater than 1 MΩ it may take a few seconds for the display to stabilize. This is normal.
• If there's a tear between the measuring pins or the circuit is open, the screen will display an overflow.
• Before measuring resistance, make sure that the

measured circuit is not under power and all capacitors are discharged.

Measuring diode

• Set the function switch to the "Ω •") / ➕ position. Press the "SELECT" button until you see a " ➕ " sign on the screen.
• Connect the measuring wire and the measuring pin to the measured diode (the pin should go on the anode, the wire on the cathode of the diode).
• The opening voltage of the diode is displayed on the screen.

Measuring/displaying continuity

• Set the function switch to the "Ω •”) / ➤ position. Press the "SELECT" button until you see the "•”) " sign on the screen.
• Connect the measuring wires and the measuring pin to the measured circuit. If the resistance is lower than 30 , the device will beep.

Automatic power off

- If you do not use the device for at least 15 minutes it will turn off automatically and go into standby mode. To turn it on again, press the "HOLD" button or switch to another function.

Battery replacement

- To replace the battery remove the screw from the battery container lid, replace the battery to one of the same type and screw the lid back on.

Note:

• Before replacing the battery disconnect the measuring wire and the pin from the measured circuit.
• Switch the device off before replacing the battery.
• Pay attention to the correct polarity when inserting the battery. The device may be damaged if the battery is put in backwards.
• Only use the prescribed battery type (CR2032)

Fuse replacement

Fuse replacement is seldom necessary, and even if it is, it is mostly due to user error. Use only the following type of fuse for replacement:

F250 mA/250 V (R5x20 mm)

To replace the fuse:

• Turn off the device.
• Remove the "A" screw and the "B" cover.
• Remove the "D" screws. Remove the "C" battery container lid and take off the back cover of the device.
• Carefully remove the fuse ("E")
• Insert the new fuse.
• Put the device back together.

Accessories

• 1 battery(CR2032)
• 1 user manual

DE

WARNUNG!

V AC 2 sec
V DC 1 sec
0 Ω < 200 kΩ 1 sec
200 kΩ < 2 MΩ 2 sec
2 MΩ < 20 MΩ 5 sec

RELATÍV PÁRATARTALOM TARTOMÁNY

minden tartomány a 20MΩ kivételével	0% – 90% (0 °C – 35 °C)
	0% – 70% (35 °C – 50 °C)
20MΩ-os tartomány	0% – 80% (0 °C – 35 °C)
	0% – 70% (35 °C – 50 °C)

SPECIFIKÁCIÓ

V AC 2 sec
V DC 1 sec
0 Ω < 200 kΩ 1 sec
200 kΩ < 2 MΩ 2 sec
2 MΩ < 20 MΩ 5 sec

ROZSAH RELATIVNÍ VLHKOSTI

minden tartomány a 20MΩ kivételével	0% – 90% (0°C – 35°C)
	0% – 70% (35°C – 50°C)
20MΩ-os tartomány	0% – 80% (0°C – 35°C)
	0% – 70% (35°C – 50°C)

SPECIFIKACE

Výměna:

Vypněte zařízení.

Odstraňte šroub označenou jako "A" a odstraňte kryt označený jako "B".

Vac 2 sec
Vdc 1 sec
0Ω<200kΩ 1 sec
200kΩ<2MΩ 2 sec
2MΩ<20MΩ) 5 sec

OBLAST RELATÍVNEJ VLHKOSTI VZDUCHU

Každá oblast' okrem20 MΩ	0% – 90% (0 °C – 35 °C)
	0% – 70% (3 5°C – 50 °C)
Oblast' 20 MΩ	0% – 80% (0 °C – 35 °C)
	0% – 70% (35 °C – 50 °C)

ŠPECIFIKÁCIA

Výmena poistky:

• Vypnite zariadenie.
- Odstráňte skrutku so znakom "A", dajte dolu pokrytie baterky so znakom "B".
- Odstráňte skrutky so znakom "D". Odstráňte pokrývku baterky so označený ako "C" a dajte dole zadné pokrytie zariadenia.
- Opatrne odstráňte poistku ("E").
• Vložte novú poistku.
• Zmontujte zariadenie.

DopInky

V AC 2 sec
V DC 1 sec
0 Ω < 200 kΩ 1 sec
200 kΩ < 2 MΩ 2 sec
2 MΩ < 20 MΩ 5 sec

ZAKRES WILGOTNOŚCI WZGLĘDNEJ

Vac 2 sec
Vdc 1 sec
0Ω<200kΩ 1 sec
200kΩ<2MΩ 2 sec
2MΩ<20MΩ) 5 sec

DOMENIUL DE UMIDITATE RELATIVĂ

Toate domeniile mai puțin 20MΩ	0% – 90% (0 °C – 35 °C)
	0% – 70% (35 °C – 50 °C)
Domeniul 20MΩ	0% – 80% (0 °C – 35 °C)
	0% – 70% (35 °C – 50 °C)

SPECIFICATII