Maxwell 25304 User Manual

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DIGITAL MULTIMETER

DIGITÁLIS MULTIMÉTER

MULTIMETRU DIGITAL

DIGITÁLNY MULTIMETER

Product code / Termékkód / Cod produs / Kód produkta:

25304

VC9808+

User Manual

General description

Display

4 digit liquid crystal display max. value 9999

Polarity

Automatic negative polarity display

Nullication automatic

Measurement process

A/D converter

Overload display only „OL” is displayed

Low battery power

The( ) symbol appears on the screen

Safety prescriptions

CE EMC/LVD. Device complies to IEC1010 standard

Protection category

II, double insulation

Operating environment

temperature: 0…40 °C, relative humidity: < 80%

Storage environment

temperature: -20…60°C, relative humidity: < 80%

Battery 1 x 9V IEC 6F22 Battery

Dimensions

190 mm x 88,5 mm x 27,5 mm

Weight 422 g (with battery)

Accesories

Instructions, connection cable (red and black, 1 pair), hitting pocket protector, K-type thermometer probe

electrical cHaracteristics

Accuracy +/- (% of displayed value + number of digits) at 23 +/-5 °C, < 75% relative humidity

DCV

Range Accuracy Resolution

200 mV

+/- (0,5% + 3)

0,1 mV

2 V 1 mV

20 V 10 mV

200 V 100 mV

1000 V +/- (0,8% + 10) 1 V

Input Impedance

10 MΩ

Overload protection

(Range: 200 mV)

1000 VDC or AC peak value

250 VDC or AC peak value

ACV

Range Accuracy Resolution

200 mV

+/- (0,8% + 5)

0,1 mV

2 V 1 mV

20 V 10 mV 200 V 100 mV 750 V +/- (1,2% + 10) 1 V

Input Impedance 10 MΩ

Frequency response

40 Hz - 1 KHz (sine wave and triangular wave)

40 Hz - 200 Hz (other waves)

DCA

Range Accuracy Resolution

2 mA

+/- (0,8% +10)

1 μA

20 mA 10 μA

200 mA 100 μA

20 A +/- (2% + 5) 10 mA

Overload protection

20 A / 250 V fuse with "F" mark

200 mA / 250 V fuse with "F" mark

User Manual

ACA

Range Accuracy Resolution

2 mA

+/- (0,8% + 10)

1 μA

20 mA 10 μA

200 mA 100 μA

20 A +/- (2% + 5) 10 mA

Overload protection

20 A / 250 V fuse with "F" mark

200 mA / 250 V fuse with "F" mark

Frequency response

40 Hz - 1 KHz (sine wave and triangular wave)

40 Hz - 200 Hz (other waves)

Capacitance

Range Accuracy Resolution

20 nF

+/- (3,5% + 20)

10 pF

200 nF 100 pF

2 μF 1 nF

20 μF 10 nF

200 μF

+/- (5% + 10)

100 nF

2000 μF 1 μF

Overload protection

DC 250V or AC peak value

Transistor hFE-Test

Function Description Test state

The amplication

factor of the transis-

tor is measured

(0-1000)

(NPN or PNP)

Base current

appr. 10 μA

VCE appr.

3 V

Resistance

Range Accuracy Resolution

200 Ω +/- (0,8% + 5) 0,1 Ω

2 kΩ

+/- (0,8% + 3)

1 Ω

20 kΩ 10 Ω

200 kΩ 100 Ω

2 MΩ 1 kΩ

20 MΩ

+/- (1,0% + 25)

10 kΩ

Overload protection

250 V DC or AC peak value

The reading be displayed slowly when the measurement is more than 1 MΩ. Please wait it to be stable.

Temperature (with a K type temperature sensor)

Range Accuracy Resolution

-20 °C - 1000 °C +/- (1,5%+15)

1°C

0 °F - 1832 °F 1 °F

Diode and Continuity Testing

Function Reading Condition

Forward voltage

drop of diode

Forward DCA is

approx. 1 mA, the backward

voltage is

approx. 3 V

Buzzer makes a

long sound while

resistance is less

than

70 Ω +/- 20 Ω

Opening volta-

ge appr. 3 V

Overload protection

250 V DC or AC peak value

User Manual

Frequency

Range Accuracy Resolution

10 Hz

+/-(0,1%+3)

0,01 Hz

100 Hz 0,1 Hz

1 kHz 1 Hz

10 kHz 10 Hz

100 kHz 100 Hz

1 MHz/10 MHz 1 kHz/10 kHz

Overload protection

250 V DC or AC peak value (for maximum 10 seconds)

Input sensitivity 1 V RMS

Inductance

Range Accuracy Resolution

2 mH

+/-(2,5%+30)

1 μH

20 mH 10 μH

200 mH 100 μH

2 H 1 mH

20 H 10 mH

Overload protection DC 36 V

Warning: Do not connect external voltage source to the connectors!

2-2 2-1

7 6

2-4

2-3

1. LCD: display the measuring value and unit

2. Function keys 2-1. Power switch: turn on/o the power 2-2. Hold and backlight key: short press to the

measured value is held on LCD and "HOLD" symbol displays. Press it again "HOLD" symbol disappears and meter is exited the holding mode. Long press to turn on/o the backlight.

2-3. Transistor test socket. 2-4. Press "REL/MAX/MIN", then you can test the

relative magnitude. If you hold the "REL/MAX/ MIN" for more than 2s, you can test the Max

and Min value.

3. Range knob: to select measuring function and

range.

4. Voltage, resistance, frequency, capacitance, diode port - „V / Ω”

5. Common measuring port (COM)

6. Port for measuring current less than 200 mA

and inductivity

7. Port for measuring current 20 A

Usage

• Check the 9 V battery and press the "POWER"

button. If the battery is depleted, the battery symbol appears on the screen.

• The signs near the connectors warn about not

exceeding the inward voltage or current. This is to prevent damage to the inside circuits.

• Before measuring set the function switch to the

desired position.

• If you are unsure about the magnitude of the

result, set the switch to the highest possible range and go backwards until you reach the correct setting.

DC and AC voltage measuring

• Connect the black measuring wire to the „COM”,

and the red one to the „V / Ω” connector.

• Set the function switch to the correct "V"

position and connect the wires to the voltage source paralelly.

Note:

• If you are unsure about the magnitude of the result, set the switch

to the highest possible range and go backwards until you reach the correct setting.

• Set the DC / AC switch to the desired (DC or AC) function.

• If only an „OL” is displayed on the screen, it signals overload.

Switch to a higher range.

• Do not connect voltage exceeding DC 1000 V / AC 700 V to the

connectors. Results may be displayed at higher voltages also, but this may lead to damage to the inside circuits.

• Do not touch the high voltage circuits while measuring.

User Manual

DC and AC current measuring

• Connect the black wire to the „COM” and the

red one to the „mA” connector (max. 200 mA) or the „20A” connector for measuring 200 mA or 20 A.

• Set the function switch to the proper range.

• Connect the the wires to the circuit serially.

• For measuring current between 200 mA and 20

A follow the instructions above, but connect the red wire to the „20A” connector.

Note:

• If you are unsure about the magnitude of the result,

set the switch to the highest possible range and go backwards until you reach the correct setting.

• If only an „OL” is displayed on the screen, it signals

overload. Switch to a higher range.

• The maximum inward current is 200 mA or 20 A

depending on the connector. (For maximum 15 seconds.) Too much currency overheats the fuse which needs to be replaced. The 20 A measuring range is not protected.

• Maximum overload voltage: 200 mV.

Resistance measuring

• Connect the black wire to the „COM”, and the red

one to the „V / Ω” connector.

• Set the function switch to the desired resistance

range.

• Touch the wires to the measured circuit paralelly.

Warning: make sure that the measured circuit is not under power!

• The maximum overload capability for the

connector is 250 V RMS (for maximum 10 seconds).

Note:

• If the measured resistance value is over the maximum

threshold and the device signals overload („OL”), select a higher range. When measuring above 1 MW it may take a few seconds for the device to stabilize the displayed value. This is completely normal for such resistors.

• If you do not connect a resistor to the connector (or there is

a break) the display will show „OL”.

• If you are measuring a resistor that is part of a circuit make

sure that the circuit is not under power and all capacitors are discharged.

• Do not connect inward voltage to the device as it may lead to

damage to the inside circuits.

• The outward voltage on connectors not under power is

approximately 3 V.

Capacity measuring

• Set the function switch to "2 mF" position.

• Connect the measured capacitor to the „V /

Ω” and "COM" connector. Pay attention to the correct polarity.

Note:

• If the measured value exceeds the maximum value of the

selected range and the device signals overload („OL”).

• Unit: 1 nF=10

-3

μF or 1000 pF

• Do not connect external voltage or current to the connector!

Turn o the power and discharge the capacitors before measuring. Also discharge the electrolyte capacitors before measuring!

• Before measuring discharge the electrolyte capacitors

more times.

Diode and continuity test

• Connect the black measuring wire to the

„COM”, the red one to „V / Ω” connector. (Note: the polarity of the red wire is: +)

• Set the function to „ ” position.

• Touch the wires to the diode's connectors.

The screen shows the opening voltage of the diode.

• Connect the wires to two points of the circuit. If

the resistance is below 90 Ω the device beeps.

Note:

• If you do not connect a unit to the connectors (or there is a

break) the display will show „OL”.

• During the test 1 mA current goes through the diode.

• The display shows the opening voltage of the diode in mV,

and overload if the diode is connected with the polarity reversed

Temperature measuring

• Set the function switch to "°C/°F" position.

• Connect the black wire of the temperature

measuring sensor to the „COM” connector and the red one to the „V/Ω” connector. Put the sensor to the place measured. The display shows the measured value in °C or °F (press "HOLD" button to select).

Note:

• The device functions with a special temperature measuring

sensor.

• If the sensor is not connected to the connector, the device

displays the temperature of the environment.

• Do not connect outward voltages to the connectors, if the

device is in temperature measuring function.

Transistor hFE test

• Set the function switch to "hFE" position.

• Determine if the transistor is NPN or PNP and

place it in the proper connector.

• The amplication factor of the transistor is

displayed on the screen.

• IB = 10 μA, VCE = 2,8 V

User Manual

Frequency measuring

• Connect the measuring wire or the shielded

cable to the „COM” and „V / Ω” connectors.

• Set the function switch to „20MHz” position

and touch the wires to the signal source.

Note:

• Do not measure frequency at a voltage exceeding 250

V(RMS).

• In noisy environment it is advised to use a shielded cable for

measuring small values.

• Avoid touching the circuit when measuring high voltage!

• Frequency measuring changes range automatically.

Inductance measuring

• Set the function swith to the desired measuring

range.

• Connect the measured inductor to the "mA"

and "COM" terminal.

Remark:

• If the measured inductance is not known, start measuring

at H range until overload signal turns o.

• Inductors with low inductance function as short circuits. If

possible, do not connect such inductors to the connectors.

Auto Power O

• After stop working for 15 minutes, the meter

will be into sleep mode. Press "POWER" key can back to work.

• Press "REL/MAX/MIN" key and at the same time

with the "POWER" key the "APO" symbol will disappear, now you already closed the function of auto power o.

WarninG

• When measuring voltage make sure that the

wires are not connected to a current measuring connector and that the function switch is not in resistance or diode measuring measuring mode. Always check if you have connected the wires into the proper connectors.

• Be careful when measuring voltage above 50 V,

especially with high voltage equipment.

• Avoid connecting to „live” circuits.

• Turn o the power in the circuit before

connecting the multimeter to measure current and do not measure above 20 A.

• Before measuring resistance and diode make

sure the circuit is not under power.

• Always set the function and measuring range

appropriate for the measuring. If in doubt,

set the maximum measuring range and go backwards.

• Make sure that the wire and its isolation is not

damaged.

• Only replace fuses to the same type and value.

• When replacing the fuse or battery make sure

all external power sources are turned o and that the multimeter is turned o as well.

care and maintenance

Operation

• Keep the multimeter dry. If it gets wet, dry it up

immediately. The liquid corrodes the electric circuit.

• The multimeter should be stored and used

only at normal temperature. High temperature can shorten the lifetime of electronic devices, damage to the batteries and distort, melt the plastic parts.

• Handle the multimeter carefully. If it is dropped

that can cause damage to the electric circuit and to the case which leads to the improper operation of the multimeter.

• Keep away the multimeter from dust and

dirt which results in premature wear of the components.

• The multimeter can be cleaned with wet

cloth. Do not use chemicals, solvents or strong detergents for cleaning.

• Servicing

• Battery replacement (1 piece 9V)

• Turn o all external circuits. Switch o the

multimeter and pull out the test lead of the socket.

• Unscrew the screws and remove the bottom

cover.

• Remove the low battery and replace a same

type of it.

Fuse replacement

• Turn o all external circuits. Set the switch to

OFF position and pull out the test lead of the socket.

• Unscrew the screws and remove the bottom

cover.

• Replace the blown out fuse to a same type and

valued (5x20 mm, 200 mA / 250 V „F” signed.)

Használati utasítás

általános leírás

Kijelző

4 digites folyadékkristályos max. kijelezhető érték 9999

Polaritás

automatikus negatív polaritás kijelzés

Nullázás automatikus Mérési eljárás A/D konverter

Túlterhelés kijelzés

csak az „OL” felirat látható

Alacsony telepfeszültség

az elem( ) szimbólum megjelenik a kijelzőn

Biztonsági előírás

CE EMC/LVD. A műszer megfelel az IEC1010 szabványnak

Érintésvédelmi osztály

II. Kettős szigetelésű

Üzemi környezet hőmérséklet (relatív páratartalom)

0-40 °C (< 80%)

Tárolási környezet hőmérséklet (relatív páratartalom)

-20 °C- +60 °C (< 80%)

Elem

1 db 9V-os IEC 6F22 típusú elem

Méretek

190 mm x 88,5 mm x 27,5 mm

Tömeg 422 g (elemmel)

Tartozékok

használati utasítás, műszerzsinór (piros és fekete,1 pár), ütésvédő tok, K tipusú hőmérő szonda

elektromos jellemzők

A pontosság +/- (kijelzett érték %-a + digitek száma) 23 +/-5 °C-on, 75%-nál kisebb relatív páratartalom esetén

DCV

Méréshatár Pontosság Felbontás

200 mV

+/- (0,5% + 3)

0,1 mV

2 V 1 mV

20 V 10 mV

200 V 100 mV

1000 V +/- (0,8% + 10) 1 V

Impedancia 10 MΩ

Túlterhelés elleni védelem

(tartomány: 200 mV)

1000 VDC vagy AC csúcsérték

250 VDC vagy AC csúcsérték

ACV

Méréshatár Pontosság Felbontás

200 mV

+/- (0.8% + 5)

0,1 mV

2 V 1 mV

20 V 10 mV 200 V 100 mV 750 V +/- (1.2% + 10) 1 V

Impedancia 10 MΩ

Frekvenciaátvitel

40 Hz - 1 KHz (szinuszjel és háromszögjel)

40 Hz - 200 Hz (egyéb jel)

DCA

Méréshatár Pontosság Felbontás

2 mA

+/- (0,8% + 10)

1 μA

20 mA 10 μA

200 mA 100 μA

20 A +/- (2% + 5) 10 mA

Túlterhelés elleni védelem

20 A / 250 V "F" jelzésű biztosíték

200 mA / 250 V "F" jelzésű biztosíték

+ 14 hidden pages

Maxwell 25304 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual