Axio MET AX-588B Manuale utente

DIGITAL MULTIMETER

AX-588B

OPERATION MANUAL

1. Sumary

His series product is a stable and battery-driven 3 ½ digital multimeter with high reliability.

It adopts LCD screen with character height of 28mm; with functions including unit sign/backlight

and overload protection, it is easy to use.

This series of device can be used to measure DCV, ACV, DC, AC, resistance, capacitance,

inductance, diode, triode, open circuit, temperature and frequency, as well as hold peak value.

As an instrument with excellent performance it adopts double integral A/D converter as its core.

2. For purchasers of this multimeter

Safety notice

This series of device is designed according to IEC1010 standard (safety standard issued by

International Electrotechnical Committee). Please read these safety notices before using it.

1) Never input DC higher than 1000V or AC higher than 750V virtual voltage as measuring voltage.

2) The voltage lower than 36V is safe. Please confirm the earthing, connection and isolation of

pencils to avoid electric shock when measuring the voltage of DC higher than 36V or AC higher than

25V

3) Pencils should be away from test points when switching function or range.

4) Select correct function and range and beware of miss-operation. You may still be careful to

ensure the safety even the device has range protection functions.

5) Never input current higher than 20A when measuring current

6) Introduction for safety sign.

Dangerous voltage existing

Earthing

Double Isolation

Shall refer to the user’s manual

Low battery

3. Unpacking inspection

Open the package to check if all parts and accessories are all right in the box.

Multimeter 1

Battery (9V) 1

Temperature probe (banana type) 1 pair

Testing accessory 1

Pencil(20A) 1 pair

User’s manual 1

4. Features

1) General features

1-1. Display mode: LCD

1-2. Max. display: 1999 (3 ½) digits automatic polarity display

1-3. Measurement method: double integral A/D conversion

1-4. Sampling rate: about 3 time per second

1-5. Over-range display: the highest digit displays “OL” or “-OL”

1-6. Low voltage display:

1-7. Working environment: (0~40)°C, relative humidity: <80%

1-8. Power supply: one 9V battery (6F22 or equivqlent model)

1-9. Dimension: 189mm*97mm*35mm (length*width*height)

1-10. Weight: about 400g (including 9V battery)

2) Technical features

2-1. Accuracy: ±(a% x reading data + character number), ensure in accuracy environment

temperature:

(23±5)°C, relative humidity <75%, and the calibration warranty period lasts for one year from the

data of leaving the factory.

2-2. Performance (▲indicates the function is available for this model)

Function:

DCV ▲

ACV ▲

DCA ▲

ACA ▲

Resistance Ω▲

Diode/Open circuit ▲

Triode hFE ▲

Capacitance C ▲

Temperature °C ▲

Frequency f ▲

Indicate L ▲

Auto power off ▲

Backlight ▲

Peak value holding ▲

2-3. Technical index

2-3-1. DCV

Range

Accuracy

Resolution

200 mV

± (0,5 % + 3)

100 μV

2 V

1 mV

20 V

10 mV

200 V

100 mV

1000 V

± (1,0 % + 5)

1 V

Input impedance: All range is 10MΩ

Over load protection: 250V DC or 250V AC peak value for range

200mV; 1000V DC or 1000V AC peak value for other.

2-3-2. ACV

Range

Accuracy

Resolution

200 mV

± (1,2 % + 3)

100 μV

2 V

± (0,8 % + 5)

1 mV

20 V

10 mV

200 V

100 mV

750 V

750V

1 V

Input impedance: All range is 10MΩ

Over load protection: 250V DC or 205V AC peak value for range

200mV; 1000V DC or 1000V AC peak value for other

Frequency response: 40~400Hz for range under 200V

40~100Hz for range 750V

Display: Sine wave virtual value (AVG value response)

2-3-3. DCA

Range

Accuracy

Resolution

2 mA

± (0,8 % + 3)

1 μA

20 mA

10 μA

200 mA

± (1,2 % + 4)

100 μA

20 A

± (2,0 % + 5)

10 mA

Max measurement voltage drop: 200mV

Max input current: 20A (no more than 10 seconds)

Overload protection: 0.2A/250V self-healing fuse for ranges under 200mA, 12A/20V quick acting

fuse for range 20A.

2-3-4. ACA

Range

Accuracy

Resolution

2 mA

± (1,0 % + 5)

1 μA

20 mA

10 μA

200 mA

± (2,0 % + 5)

100 μA

20 A

± (3,0 % + 10)

10 mA

Max measurement voltage drop: 200mV

Max input current: 20A (no more than 10 seconds)

Over load protection: 0.2A/250V self-healing fuse for ranges under 200mA. 12 A/250V quick acting

fuse for range 20A

Frequency response: 40~200Hz

Display: Sine wave virtual value (AVG value response)

2-3-5. Resistance (Ω)

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

200MΩ

± (1,0 % + 15)

10 kΩ

2000 MΩ

± [5,0 %(odczyt -10) +20]

1 MΩ

Open circuit voltage: lower than 3V

Over load protection: 250VDC or AC peak value

Caution:

a) If in range 200Ω, please short pencils and measure lead resistance, and then subtract the

resistance from the value measured.

b) It is normal to show 10MΩ when pencils shorted in range 2000MΩ, it will not effect the accuracy

and shall be subtracted from the value measured. For example: the object resistance is 1000MΩ,

the reading value is 1010MΩ then the correct value shall be 1010-10=1000MΩ

c) Lagged showing of value is normal when measuring resistance higher than 1MΩ. Please wait until

the display is stable.

2-3-6. Capacitance (C)

Range

Accuracy

Resolution

20 nF

± (2,5 % + 20)

10 pF

200 nF

100 pF

2 μF

1 nF

20 μF

10 nF

200 μF

± (5,0 % + 5)

100 nF

Testing frequency: 100Hz

Over load protection: 36V DC or AC peak value

2-3-7. Inductance (L)

Range

Accuracy

Resoluton

2 mH

± (2,5 % + 20)

1 μH

20 mH

10 μH

200 mH

100 μH

2 H

1 mH

20 H

10 mH

Testing frequency: 100Hz

Over load protection: 36V DC or AC peak value

2-3-8. Temperature (°C)

Range

Accuracy

Resolution

(-20 ÷ 1000) °C

± (1,0 % +4) < 400 °C

± (1,5 % +15) ≥ 400 °C

1 °C

Thermocouple (plug of banan type)

2-3-9. Frequency (f)

Range

Accuracy

Resolution

2 kHz

± (0,5 % + 4)

1 Hz

20 kHz

10 Hz

200 kHz

100 Hz

2000 kHz

1 kHz

10 MHz

10 kHz

Input sensitivity: higher than 3.5V V p-p

Over load protection: 250V DC or AC peak value (less than 10 seconds)

2-3-10. Diode and open circuit test

Range

Value displayed

Test condition

Diode forward voltage drop

(Unit:Mv)

Forward DC: abort 1mA

reversevoltage: abort 3V

Buzzer sounds continuously,

resistance between two test

points is less than (70 ± 20) Ω

Open circuit voltage is about

Over load protection: 250V DC or AC peak value

Warning: Never input voltage in this range

2-3-11. Measuring triode’s hFE parameter

Range

Display range

Test condition

hFE NPN lub PNP

0 ÷ 1000

Base electrode current is abort

10uA, and Vce is about 3V

5. Operation method

5-1. Operation panel introduction

1. LCD: display the measured value and the unit

2. Function keys

2-1. power switch: turn on/turn off power

2-2. PK HOLD: Pressing this key will hold all max value

measured in the screen showing sign “PH”; press again,

“PH” will disappear and exit the status of peak value

holding.

2-3. B/L switch to enable backlight which will be turned

off auto after about 5 seconds.

2-4. DC/AC: select DC/AC working mode.

3. Rotary switch: to change measurement function and

range.

4. Jack for measurement of voltage, resistance and frequency.

5. Common ground: positive input for capacitance (Cx), inductance (Lx), triode and temperature.

6. Positive jack for current lower than 200mA; negative input for capacitance (Cx), inductance (Lx),

triode and temperature.

7.Jack for current 20A. Please refer to the figure.

5-2. Voltage measurement

1) Insert the black pencil into the “COM” jack, and the red one into the “V/Ω/Hz” jack.

2) Turn the switch to position “V”. If the level of voltage to be measured is unknown then select the

biggest range and then decrease the range step by step until getting the value with the highest

resolution.

3) Popup the key “DC/AC” to enter into DC mode if measuring DC. Press down the key “DC/AC” to

set into AC mode.

4) The screen will show the voltage measured if touch the testing point using the pencils; the point

touched by the red pencil is in positive voltage if the value showed is positive.

Notice:

1) As showed, “OL” indicates the range is over and shall switch to a higher range.

2) The voltage to be tested shall not over DC 1000V or AC 750V. The pencils shall be away from the

testing point as switching functions or ranges.

3) When measuring high voltage circuit, any parts of your body should not touch the high voltage

circuit, otherwise it may hurt your body.

5-3. Current measurement

1) Insert the black pencil into the “COM” jack, and the red one into the “mA” or “20A” jack.

2) Turn the switch to position “A”. If the level of current to be measured is unknown then select the

biggest range and then decrease the range step by step until getting the value with the highest

resolution.

3) Popup the key “DC/AC” to enter into DC mode if measuring DC; press down the key “DC/AC” to

set into AC mode.

4) The screen will show the value of current measurement if connect in parallel the pencil to the

circuit to be tested; the point touched by the red pencil is in positive voltage if the value showed is

positive.

Notice:

1) As showed “OL” indicates the range is over and shall switch to a higher range.

2) The input in “mA” jack shall not over 200mA and “20A” not over 20A (less than 10 seconds of

testing duration) as measuring current, the pencils shall away from testing points as switching

function or range.

5-4. Resistance measurement

1) Insert the black pencil into the “COM” jack, and the red one into the “V/ΩHz” jack.

2) Turn the range switch to resistance position, then bride two pencils at the two ends of the

resistor.

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