MAXWELL 25201 Digital Multimeter User Manual

DIGITAL MULTIMETERS
DIGITAL MULTIMETER
roduct code
25201
User Manual

SUMMARY

This broad-spectrum measurement device enables you to measure DCV, ACV, DCA, ACA, resistance, capacity, diode, transistor, continuity and temperature. Ideal for using in laboratories, factories and even at home.

SAFETY REMARKS

This device complies to the IEC10101 standards. Read the manual carefully before use.

• Do not measure a higher value than the set range.
• To avoid electric shock make sure that the measuring wires are intact.
• Disconnect the measuring wires while changing function.
• Select the proper function and range, avoid incorrect usage.
• Do not use the device if the battery holder lid and back cover are not in their places.
• Do not measure voltage while in resistance measuring mode.
• Remove the wires and turn the device off before replacing the battery or fuse.
• Safety signs:

|  Dangerous voltage
---|---
****| Grounding
| Double insulation
|  Low battery power

CHARACTERISTICS

TECHNICAL DATA

DCV

Input resistance: 5m Ω at mV range , other ranges: 10 mΩ
ACV

Input resistance: 10MΩ
Overload protection: 1000V DC or AC peak value Frequency response : (40~1000)Hz (for standard sine wave and triangular wave), True RMS (just for referencewhen over 200Hz at other waves.)
DCA

ACA

Frequency response : (40~1000)Hz (for standard sine wave and triangular wave), True RMS (just for reference when over 200Hz at other waves.)
Resistance

WARNING: Do not measure voltage while in resistance mode!
Capacity

Temperature

with a K type temperature sensor
Diode and continuity test

appr. 3V
| Beeping if the resistance is lower than (70±20)Ω| Opening voltage appr. 3V

Triode hFE test

Opening voltage appr. 3V

OPERATION

1. Model no.
2. LCD display
3. Diode signal light
4. Function switch
5.  „+” connector : 20A
6.  „+” connector : mA+ capacity + temperature
7.  „-” connector: ground (GND) + capacity+ temperature
8.  „+” connector: voltage, resistance, diode, continuity test
9. Transistor connector
10. Backlight/Auto Power Off/Hold/Select

DCV measuring

• Connect the black measuring wire to the „COM” connector, and the red one to the „V/Ω” connector.

• Set the function switch to the proper DCV setting, and connect the wires to the circuit.
  Note:

• If you are unsure about the measured voltage range, set the function switch to a high range.

• If the LCD shows „1” it means overload, and the range should be set to a higher value.

ACV measuring

• Connect the black measuring wire to the „COM” connector, and the red one to the „V/Ω” connector.

• Set the function switch to the proper ACV setting and connect the wires to the circuit.
  Note:

• If you are unsure about the measured voltage range, set the function switch to a high range.

• If the LCD shows „1” it means overload, and the range should be set to a higher value.

DCA measuring

• Connect the black measuring wire to the „COM” connector, and the red one to the „mA” connector (max. 200mA), or connect the red wire to the „20A” connector (max. 20A).

• Set the function switch to the proper DCA setting and connect the wires to the circuit.
  Note:

• If you are unsure about the measured voltage range, set the function switch to a high range.

• If the LCD shows „1” it means overload, and the range should be set to a higher value.

• Max inward current 200mA or 20A (depending on the placement of the red wire), in case of an exceeding current the fuse will melt.

ACA measuring

• Connect the black measuring wire to the „COM”connector, and the red one to the „V/Ω” connector.

• Set the function switch to the proper ACA setting, and connect the wires to the circuit.
  Note:

• If you are unsure about the measured voltage range, set the function switch to a high range.

•  If the LCD shows „1” it means overload, and the range should be set to a higher value.

• Max inward current 1000V.

Resistance measuring

• Connect the black measuring wire to the „COM” connector and the red one to the V/Ω connector.

• Set the function switch to the proper resistance setting and connect the wires to the measured resistor.
  Note:

• If the measured resistance value is over the chosen max value the LCD will show „1” and the function switch needs to be set to a higher range. It may take a few seconds for the device to stabilize when measuring above 1MΩ

Capacity measuring

• Connect the wire to the „V/Ω „ connector and the red one to the „COM” connector.

• Set the function switch to a proper capacity setting and connect the wires to the measured capacitor.
  Note:

• If you are unsure about the measured capacity set the function switch to a high range.

• If the LCD shows „1” it means overload and the function switch needs to be set to a higher range.

• To be safe, discharge the measured capacitor before measuring.

Diode and continuity test

• Connect the black measuring wire to the „COM” connector, and the red one to the „V/Ω” connector (Note: the red wire’s polarity is „+”)
• Set the function switch to the „ ” position, connect the wires to the measured diode.
• Connect the wires to the diode’s measuring points, if the device beeps, the resistance is lower than appr. (70±20)Ω

Temperature measuring

• Connect the red wire to the mA, and the black one to the “COM” connector. Touch the end of the thermometer to the measured object and the  temperature value is displayed on the screen indegrees Celsius.

hFE

• Set the function switch to hFE.
• Place the part into the transistor connector depending on whether it is NPN or PNP type.

Automatic turn-off

• If the device is not used for 15 minutes it turns off automatically. To use it again, turn the function switch.

Background lighting

• Push the button „10” shortly to switch on or off the background lighting.

AUTO POWER-OFF AND LCD BACKLIGHT ON

• After power on, LCD displays “APO” , mean the meter is in automatic power off mode. With rotate the knob in 15 minites and the figure changing. The meter is in nonautomatic power off mode. Press “HOLD” key to power on the meter, when “APO” isn’t showing on LCD, the meter is in nonautomatic power off mode. Shortly press “HOLD” key to turn on/off the “HOLD” function. Long press “HOLD” key to turn on/off the backlight.

“HOLD” function

• Press “HOLD” key to fixed measurement value on display.

MAINTENANCE

• Note that this device is not water-, dust- and shockresistant.
• Do not use and do not store the device at high temperatures, in places with high humidity or flammability or in strong magnetic fields.
• Do not use rough textile or alcohol.
• If the device is not being used for a longer time period, the battery must be taken out.

Battery replacement (2 x 1,5 V AA)
If the LCD display shows „ ” , the battery needs to be replaced the following way:

• Take the device out of the plastic holder and take off the battery holder cover.
• Take out the battery and replace it to a new one. Use alkaline batteries if possible.
• Put the battery holder cover back.

Fuse replacement

• Only used the prescribed types of fuses for replacing. If the device does not operate properly, check the following:

• Replace the battery
”   is displayed| Replace the battery
No power| Replace the fuse

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