Axio MET AX-572 User manual

Digital Multimeter
AX-572
Instruction manual

1. SUMMARIZE
The meter is a stable multimeter with 40mm LCD display, driven by battery. It's widely used on
measuring DCV, ACV, DCA, ACA, resistance, capacitance, diode, transistor, continuity test
,temperature auto power off /on and LCD back – light . It’s an ideal tool for lab, factory and family.
2. SAFETYNOTE
The meter meets the standards of IEC1010. Read the operation manual carefully before operation.
1．Do not input limit over-ranged.
2．The voltage below 36V is safety. To avoid electric shock, check whether the test leads are
connected correctly, whether the insulation is good when measuring over 36DCV or 25ACV.
3．Remove the test leads when changing function and range.
4．To select correct function and range, beware of error operation.；
5．Do not operate the meter if battery case and back cover is not fixed.
6．Do not input voltage when measuring resistance.
7．Remove test leads from test point and turn off the power before replacing battery andfuse.
8．SAFETY SYMBOLS
“ ”EXISTS DANGEROUS VOLTAGE，“ ” GND，“ ”DUALINSULATION
“ ”THE OPERATOR MUST REFER TO THE MANUAL，“ ”LOW BATTERY
3. CHARACTERISTIC
3.1．
．．
．GENERAL
1-1．Display :LCD displaying.
1-2．Max. displaying: 1999（3 1/2digit）auto polarity indication.
1-3．Measuring method: dual slopeA/D conversion.

1-4．Sampling rate: approx. 3 times/second.
1-5．Over range indication: the MSD displays“1” or“-1”.
1-6．Lowbattery indication:“ ” appears.
1-7．Operation environment: （0～40），R.H.<80% .
1-8．Power：9V×1（NEDA1604/6F22 or equivalent model）.
1-9．Size: 175×93×55mm
1-10．Weight: approx. 400g（including battery）.
3.2．
．．
．TECHNICAL CHARACTERISTIC
2-1．Accuracy:±(a%×rdg＋d) at (23±5)，R.H.<75%，one year guaranteed from the production date.
2-2. TECHNICALDATA(▲indicate the function is available for this model)
RANGE
DVC ▲
ACV ▲
DCA ▲
ACA ▲
Resistance ▲
diode ▲
capacitance ▲
TRANSISTOR ▲

2-2-1. DCV
RANGE ACCURACY RESOLUTI
ON
200mV 100uV
2V 1mV
20V 10mV
200V
±(0.5%+3)
100mV
1000V ±(0.8%+10) 1V
Input resistance:10MΩfor all ranges.
Overload protection: 250V DV orAC peak value at 200mV range.
1000V DC or AC peak value at other ranges.
2-2-2. ACV
RANGE ACCURACY RESOLUTION
2V 1mV
20V 10mV
200V
±(0.8%+5) 100mV
750V ±(1.2%+10) 1V
Input resistance: 10MΩ
Overload protection: 1000V DC orAC peak value
Frequency response :（40～200）Hz
Display: sine wave RMS (mean value response)

2-2-3.DCA
RANGE ACCURACY RESOLUTION
20uA 0.01uA
2mA
±(0.8%+10) 1uA
200mA ±(1.2%+8) 100uA
20A ±(2.0%+5) 10mA
Max. input volt drop: 200Mv
Max. input current: 20A（the test time should be within 10 seconds）
Overload protection: 0.2A/250V；20A/250V fast-blown fuse
2-2-4.ACA
RANGE ACCURACY RESOLUTION
2mA ±(1.0%+15) 1uA
200mA ±(2.0%+5) 100uA
20A ±(3.0%+10) 10mA
Max. measuring volt drop: 200mV
Max. input current: 20A（the test time should be within 10 seconds）
Overload protection: 0.2A/250V；20A/250V fast-blown fuse
Frequency response: (40～200)Hz
Display: sine wave RMS (mean value response)

2-2-5. RESISTANCE （Ω）
RANGE ACCURACY RESOLUTION
200Ω±(0.8%+5) 0.1Ω
2kΩ1Ω
20kΩ10Ω
200kΩ100Ω
2MΩ
±(0.8%+3)
1kΩ
20MΩ±(1.0%+25) 10kΩ
Open voltage: less than 0.7V
Overload protection: 250V DC andAC peak value
NOTE: at 200Ωrange, the test leads should be short-circuit, and measure the down-lead
resistance, then, subtract from the real measuring.
WARNING: DO NOT input any voltage at resistance range for safety!
2-2-6. CAPACITANCE (C)
RANGE ACCURACY RESOLUTI ON
20nF 10pF
2uF
±(2.5%+20) 1nF
200uF ±(5.0%+10) 100nF
Overload protection: 36V DC orAC peak value

2-2-7.DIODE AND CONTINUITY TEST
Range Displaying value Test condition
Positive voltage drop of
diode
The positive DC
current is approx.
1mA，negative
voltage is approx.
3V
Buzzer sounds , the
resistance is less than
(70±20)Ω
open voltage is
approx. 3V
Overload protection: 250V DC orAC peak value
Warning: DO NOT input any voltage at this range for safety!
2-2-8. Triode hFE test
Range Display range Test condition
hFE NPN
or PNP 0～1000 Basic current is approx.10uA,Vce is approx.3V

4. OPERATION
4.1 Front panel description
1. Model
2. LCD display
3. Shine diode
4 .range knob
5 .20A current test jack
6.“-” pole jack for capacitance, temp. and test accessory and less than 200mA current test jack.
7.“+”pole jack for capacitance, temp. test accessory and GND.
8. “+”pole jack for volt, resistance and diode.
9. Transistor test jack
10. LCD back – light/auto power off /on

4.2 DCV MEASUREMENT
1.Insert the black test lead to “COM” jack, the red one to V/Ωjack.
2.Set the range knob to a proper DCV range, connect the test leads across to the circuit under tested,
the polarity and voltage of the point which red lead connect will display on LCD.
NOTE:
1.If the measured voltage is unsure beforehand, should set the range knob to the highest range, then,
switch to a proper range according to the displayed value.
2.If LCD displays “1”, it means over range, should set the range knob to a higher range.
4.3 ACV MEASUREMENT
1.Insert the black test lead to “COM” jack, the red one to V/Ωjack.
2. Set the range knob to a properACV range, connect the test leads across to the circuit under tested.
NOTE:
1.If the measured voltage is unsure beforehand, should set the range knob to the highest range, then,
switch to a proper range according to the displayed value.
2.If LCD displays “1”, it means over range, should set the range knob to a higher range.
4.4 DCA MEASUREMENT
1.Insert the black test lead to “COM” jack and the red one to“mA” jack（max. 200mA），or insert the
red one to “20A” jack（max. 20A）.
2.Set the range knob to a proper DCA range, connect the test leads across to the circuit under tested,
the current value and polarity of the point which red lead connect will display on LCD.
NOTE:
1.If the measured current is unsure beforehand, should set the range knob to a higher range, then,
switch to a proper range according to the displayed value.
2.If LCD displays “1” , it means overrange, should set the range knob to a higher range.
3. Pay attention to measure 20A.. Continuously measuring large current may heat the circuit, affect the
accuracy, eve damage the meter.

4.5 ACV MEASUREMENT
1.Insert the black test lead to “COM” jack and the red one to“mA” jack（max. 200mA），or insert the
red one to “20A” jack（max. 20A）.
2.Set the range knob to a proper ACA range; connect the test leads across to the circuit under tested.
NOTE:
1.If the measured current range is unsure beforehand, should set the range knob to the highest range,
then set to a proper range according to the displayed value.
2.If LCD displays “1” , it means overrange, should set the range knob to a higher range.
3. Pay attention to measure 20A.. Continuously measuring large current may heat the circuit, affect the
accuracy, eve damage the meter.
4.6 RESISTANCE MEASUREMENT
1.Insert the black test lead to “COM” jack and the red one to“V/Ω” jack.
2.Set the range knob to a proper resistance range, connect the test leads across to the resistance
under measured.
NOTE:
1.If the resistance value being measured exceeds the max value of the range selected, LCD displays
"1", thus, should set the range knob to a higher range. When the resistance is over 1MΩ, the meter
may take a few seconds to stabilize. This is normal for high resistance readings.
2.When input terminal is in open circuit, overload displays.
3.When measuring in-line resistance, be sure that power is off and all capacitors are released
completely.
4.7 CAPACITANCE MEASUREMENT
1.Insert the red test lead to “COM”terminal and the black one to “mA” jack.
2.Set the range knob to a proper capacitance range, connect the test leads to the capacitor under
measured（note: the polarity of red test lead is “+”）.

NOTE:
1.If the capacitance range under measured is unsure beforehand, should set the range knob to the
highest range, then, set to a proper range according to the displayed value.
2.If LCD displays“1” , it means over range, should set the range knob to a higher range.
3.Before measuring, LCD display might not be zero, the residual reading will be decreased
gradually and could be disregarded.
4.When measuring large capacitance, if creeps seriously or break capacitance, LCD will display some
instability value.
5.Discharge all capacitors completely before capacitance measurement to avoid damage.
6.UNIT: 1uF =1000nF 1nF=1000pF
4.8 DIODE AND CONTINUITY TEST
1.Insert the black test lead to “COM” terminal and the red one to V/Ωjack( Note: the polarity
of red test lead is“+”).
2.Set the range knob to“ ”range, connect the test leads to the diode under measured,
reading is the approximation of the diode positive volt drop.
3.Connect the test leads to two points of the measured circuit, if buzzer sounds, the resistance is
lower than approx.(70±20)Ω.
4.9 TRIODE hFE
1.Set the range knob to hFE.
2.Verify the type of the transistor is NPN or PNP, insert the emitter, basic and collector to the proper
jack on test accessory.
4.10 AUTO POWER-OFF AND LCD BACKLIGHT ON
When power on ,LCD screen showing “APO” ,mean the meter in automatic power-off mode , After 15
minutes, the meter is auto power-off to be in sleepy mode . Shortly and repeatly press LCD backlight
key , light on/off . If no need auto power off , press LCD backlight key for 2 seconds , the “APO” will

disappear and exit the status of auto power-off . If need auto power off ,Press LCD backlight key for 2
seconds, LCD screen showed “APO” , in circulation .
5.MAINTENANCE
DO NOT try to verify the circuit for it’s a precision meter.
1.Beware of waterproof, dustproof and shockproof.
2.Do not operate and store the meter in the circumstance of high temperature, high humidity, and
flammability, explosive and strong magnetic field.
3.Use the damp cloth and soft solvent to clean the meter, do not use abrasive and alcohol.
4.If do not operate it for a long time, should take out the battery.
4-1.When LCD displays “ ” symbol, should replace the battery as below:
4-1-1.Take out the holster and drop out the battery case.
4-1-2.Take out the battery and replace a new one. It’s better to use alkalescence battery for long
time use.
4-1-3.Fix the battery case and take on the holster.
6. If the meter does not work properly, check the meter as following:
CONDITIONS WAY TO SOLVE
NO DISPLAYING ●Power is off
●Replace battery
symbol displays ●Replace battery
NO CURRENT INPUT ●Replace fuse
BIG ERROR ●Replace battery