Model AX-594
INSTRUCTION MANUAL
Index
1. General ........................................................................................................... 3
2. Open Package inspection ...................................................................................... 3
3. Safety Note ...................................................................................................... 3
4. Safety Symbol Description ..................................................................................... 4
5. Front Panel Description ........................................................................................ 5
6. Property ......................................................................................................... 5
7. DC Voltage (DCV) ............................................................................................... 5
8. AC Voltage (ACV) ............................................................................................... 6
9. DC Current (DCA) ............................................................................................... 7
10. AC Current ( DCA) ............................................................................................. 7
11. Resistance ...................................................................................................... 8
12. Diode and Continuity Test ................................................................................... 9
13. Capacitance (C) .............................................................................................. 10
14. Frequency (Hz) ............................................................................................... 10
15. Temperature Test ............................................................................................ 11
16. Other Function and Instrument Maintenance ............................................................ 12
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1. General
The instrument is a high performance, high accuracy, 3 ¾ digit multi-meter, it uses the LCD with 33
mm high figure to make the Reading clear, the display simple and the operation convenient.
The instrument can measure DC and AC voltage, DC and AC current, Resistance, Capacitance,
Frequency, Duty Circle, Diode and Continuity test; and it also has the features of Bar Graph, Unit
Indication, Data Hold, Relative Value Measurement (REL), USB Interface, AUTO/MANUAL range
selection, Auto Power Off and Alarm Buzzer. The instrument adopts the directly driven
4 digits microprocessor and dual-integral A/D converter, which provide the high solution and high
accuracy digital displaying driver. Because of its outstanding features, it is an excellent tool and
most suitable for lab. Factory, maintenance and repair users.
2. Open-package Inspection
Open the gift box and take out the instrument, carefully check the following accessories. If any
accessory was lost or damaged, please contact the manufactory at once.
Digital Multimeter:
Operation Manual:
Test Lead:
Temperature Cable:
USB Cable:
Software disc:
1pc
1pc
1set
1pc
1pc
1pc
3. Safety Note
The instrument meets the standard of IEC1010 ( safety standard promulgated by the International
Electrician Committee). Design and manufacture complied with the standard of Pollution Degree 2.
WARNING:
To avoid endangering the safety of the users, should read the operation manual carefully before
operation, and strictly aide by the safety warning information and operation description to use the
instrument.
1. Caution to avoid the electric shock when measuring the voltage higher than 30V, the current
higher than 10mA, AC Power Lines with Inductive Load and the AC Power Lines during the period of
Electric Power Fluctuation.
2. Before measuring, should check if the function knob is set in the correct range, make sure the
test lead connects reliably, links up correctly, and insulates properly to avoid the electric shock.
3. It means the requirements of the safety standard only to use the instrument with the equipped
test lead. If the test lead is broken, should replace it by the same type and same electric
specification test lead.
4. Do not replace the inside fuse by the unconfirmed one. Only replace it by the same type and
specification fuse. Before replacement, should keep the test lead off the tested point to make sure
there is no any signal at the input terminal.
5. Do not replace the inside battery by the unconfirmed one. Only replace it by the same type and
electric specification battery. Before replacement, should keep the test lead off the tested point to
make sure there is no any signal at the input terminal.
6. When measuring electricity, do not connect the body with the ground directly, and do not touch
the possible exposed metal terminal, output socked or lead clamp with ground potential. Usually
use the dry cloth, rubber overshoes, rubber cushion and other insulated materials to keep the body
isolated with the ground
7. Do not store and use the instrument in high humility, high temperature, combustible, explosive
and strong magnetic places.
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8. It is possible to damage the instrument and endanger the safety of the users when measuring the
voltage over the range limit. The allowed maximum voltage is printed on the front panel of the
instrument, do not input the range limit specified to avoid the electric shock and instrument
damage.
9. Do not measure any voltage when connecting the test lead with the current terminal to avoid
damaging the instrument and endangering the safety of the users.
10. Do not try to calibrate or repair the instrument, should operate it by the specially trained or
qualified professional people.
11. The function range selection knob should be set in the correct range when measuring.
When switching the function/range selection knob, keep the test lead off the tested object to make
sure there is no any signal at the input terminal. Do not switch the function/range selection knob
when measuring.
12. When LCD display
, please replace the battery In time to make sure the measuring
accuracy.
13. Do not allow to measure the voltage when connecting the test lead with the current terminal?
14. Do not try to modify the inner circuit at will to avoid damaging the instrument and endangering
the safety of the users.
4. Safety Symbol Description
Warning
DCA
High Voltage! Dangerous!
ACA
GND
DCA & ACA
Dual Insulation
Meets the direction of European IEC
Low Battery
Fuse
5. Front Panel Description
1. Instrument Model Numb
2. LCD Display
3. HOLD: Date Hold button, press the button, the value is held on
LCD; Press the button again,
exit the hold mode and get in the normal measuring status.
4. Hz/DUTY: Frequency/Duty Circle selection button, press the
button to switch between the Frequency and Duty Circle mode at
Frequency Range; Press the button to switch to Voltage or
Current/Frequency/ Duty Circle mode at AC Voltage or AC Current
Range.
5. SELECT: button switch, press the button to switch the measuring
function.
6. MAX/MIN: Maximum, Minimum, press the button ,
the instrument gets into the MAX mode, the measuring maximum
value will be held at this mode; Press the button again to get into the
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MIM mode, the measuring minimum value will be held on LCD. Under this circumstance, there are
no Bar Graph and Auto Power Off function, hold pressing MAX/MIN button for
2 seconds, exit the MAX/MIN mode.
7. RANGE: Auto Range/Manual Range switch, the default is set as Auto range mode when turning on,
press the button and switch to Manual Range. At the Manual range mode, press the button once, the
range is switched to the higher one, press the button again to switch the range to the lowest one
when measuring the highest range, the cycle is in proper order from low to high. Keep pressing the
button for 2 sec., return to Auto Range mode. There is no Auto Range mode at Frequency and
Capacitance range.
8. REL: Relative Value Measurement, press the button to the mode of Relative Value Measurement,
press again to cancel the Relative Value Measurement.
Keep pressing the button more than 2 seconds to switch to RS232, RS232 symbol appears on LCD,
it indicates the instrument is getting into the status of data transmission. Keeping pressing the
button more than 2 seconds, RS232 symbol disappears, the data transmission is stopped.
9. Function /range selection knob: select the measuring function and range.
10. 10A current input terminal: measuring AC/DC 10A positive input terminal, insert red test lead.
11. uA/mA/°C input terminal: measuring AC/DC uA/mA and Temperature positive input terminal.
12. COM input terminal: negative input terminal, insert the black test lead.
13.
input terminal: measure Voltage, Frequency/Duty Circle, Resistance, Capacitance, Diode
and Continuity positive input terminal, insert the red test lead.
6. Property
General Feature
Display:
Max Display:
Measuring method:
Sampling rage:
Over range indication:
LCD
3999 (3 ¾) counts automatic polarity display and unit display
dual-integral A/D converter
3 times/ second
display “OL”
Low battery indication:
Operation environment:
Storage environment:
Power:
Dimension:
Weight:
appearance 1-7
0~40°C, relative humidity <80%
-10~50°C, relative humidity < 80 %
2 pcs 1.5V batteries (AAA 7# battery)
192mm x 95mm x 48mm
Approx. 390g (including batteries)
Technic Property
Accuracy:
(a% x reading + digits) at 23 ± 5°C, relative humidity < 75%
One year calibration guarantee since the time dispatched from the factory.
7. DC Voltage (DCV)
1. Turn the function/range selection knob to DCV
2. Insert the red and black test lead separately to VΩHz and COM input
terminal.
3. The instrument was preset as the Auto Range mode of DCV
measurement, displays “AUTO” symbol on LCD, press :RANGE” button
to switch to the Manual range mode.
4. Connect the test lead to the tested circuit in parallei, the polarity of
the red test lead and the tested voltage value will be displayed on LCD
simultaneously.
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Note:
1. Do not measure the voltage higher than DC 1000V or AC 750V.
2. When measuring the high voltage, caution to avoid electric shock. Cut the connection between
the test lead and tested circuit at once after measurement.
3. At the Manual Range mode, if “OL” is displayed on LCD, it indicates the tested voltage value has
exceeded the present range limit, lease select the higher range to complete the measurement.
Range
Accuracy
Resolution
400mV
4V
0.1mV
±(0.5% + 4)
1mV
40V
10mV
400V
100mV
1000V
±(1.0% + 6)
1V
Input impedance : >40MΩ at Range 400mV, 10MΩat other range.
Overload protection: 1000V DC or 750V AC peak value.
1. Turn the function/range selection knob to ACV.
2. Insert the red and black test lead separately to VΩHz and VCOM input terminal, displayed as the
right picture.
3. The instrument was preset as the Auto Range mode, displays “AUTO” symbol on LCD, press
“RANGE” button to switch to the Manual Range mode. ACVmV only can be operated under “RANGR”.
Press “Hz/DUTY” button to measure Frequency/Duty Circle at the Auto Range or Manual ACA model,
but the frequency response is very low, at this time, it suits to measure the circuit of high voltage
and low frequency under the circumstance of magnetic disturbance , such as 220V/50Hz-400Hz,
38V/50Hz-400Hz.
4. Connect the test lead to the tested circuit in parallel, the polarity of the red test lead and the
tested voltage value will be displayed on LCD simultaneously.
Note:
1. Do not measure the voltage higher then DC 1000V or AC 750V.
2. When measuring the high voltage, caution to avoid electric shock. Cut the connection between
the test lead and tested circuit at once after measurement.
8. AC Voltage (ACV)
Range
Accuracy
Resolution
400mV
±(1.6% + 8)
0.1mV
4V
40V
1mV
±(0.8% + 10)
400V
750V
10mV
100mV
±(1.0% + 10)
1V
Input impedance: >40MΩ at Range 400mV, 10MΩ at other range. Overload protection: 1000V DC or
750V AC peak value.
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Frequency response: 40-400Hz. Indication: average value response (RMS of sine wave). Duty Circle
indicaton (0.1%-99.9%)
1. Insert the black test lead to “COM” input terminal and the red test
lead to “uAmA” or “10A”, the max input current value is respectively
400mA and 10A, display as the right picture.
2. Turn the function/ range selection knob to current range, press
“SELECT”, switch to DC measurement mode, then connect the test
with the tested circuit in series, the polarity of the red test lead and
the tested current value will be displayed om LCD simultaneously.
3. If “OL” is displayed on LCD, it indicates the tested current value
has exceeded the present range limit, please select the higher range
to complete the measurement.
a. Do not measure the current higher than 10A at Range 10A higher
than 400uA at uA Range and higher than 400mA at mA Range,
otherwise the fuse will be burnt out or the instrument will be
damaged.
b. Do not connect the test lead to any circuit in parallel when the
test lead is inserted in the current input terminal, otherwise it is
possible to damage the instrument or endanger the safety of the
users. Cut the connection between the test lead and tested circuit
at once after measurement.
9. DC Current (DCA)
Range
Accuracy
400µA
Resolution
0.1µA
4000µA
1µA
±(1.0% + 10)
40mA
10µA
400mA
100µA
4A
±(1.2% + 10)
10A
1mA
10mA
Max input current: 10A (less than 15 seconds).
Overload protection: 0.5A/250V fuse,10A/250V fuse.
10. AC Current (ACA)
1. Insert the black test lead to “COM” input terminal and the
red test lead to “uAmA” or “10A” input terminal, displayed as
the right picture.
2. Turn the function/range selection knob to current range,
press “SELECT”, switch to AC measurement mode, than
connect the test lead to the tested circuit in series,
the polarity of the red test lead and the tested current value
will be displayed on LCD simultaneously.
3. If “OL” is displayed on LCD, it indicates the tested current
value has exceeded the present range limit, please select the
higher range to complete the measurement.
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Note:
a. Do not measure the current higher than 10A At Range 10A and higher than 400mA At Ma Range.
b. Do not connect the test lead to any circuit in parallel when the test lead is inserted in the
current input terminal, otherwise it is possible to damage the instrument or endanger the safety of
the users. Cut the connection between the test lead and tested circuit at once after measurement.
Range
Accuracy
400µA
4000µA
Resolution
0.1µA
±(1.5% + 10)
1µA
40mA
10µA
400mA
100µA
4A
1mA
±(2.0% + 15)
10A
10mA
Max input current: 10A (less than 15 seconds).
Overload protection: 0.5A/250V fuse, 10A/250V fuse.
Frequency response: 40-100Hz.
Duty Circle Indication: (0.1%-99.9%)
11. Resistance (Ω)
1. Turn the function/range selection knob to Ω, insert the red and black test lead separately to
V/Ω/Hz and COM input terminal.
2. Connect the test lead to the tested resistance in parallel, the tested resistance value will be
displayed on LCD.
3. Auto Range mode is preset when turning on, press “RANGE” button to switch to Manual Range
mode.
4. If “OL” is displayed on LCD, it indicates the tested resistance value has exceeded the present
range limit, please select the higher range to complete the measurement.
Note:
a. When measuring the In-circuit resistance, be sure all the Power of the tested circuit Has been
turned off and all capacitors are fully discharged.
b. It will cause the reading incorrect to input any voltage when measuring the resistance.
If the voltage exceeds 250V, over-range protection voltage, it is possible to damage the instrument
and endanger the safety of the users.
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c. At Range 400Ω, short-circuit the test lead to measure the wire resistance, and then subtract it
from the real measurement.
Range
Accuracy
Resolution
400Ω
±(0.8% + 5)
0.1Ω
4kΩ
40kΩ
1Ω
±(0.8% + 4)
10Ω
400kΩ
100Ω
4MΩ
1kΩ
40MΩ
±(1.2% + 10)
10kΩ
Open circuit voltage: 400mV.
Over range protection: 250V AC/DC peak value.
12. Diode and Continuity Test
1. Turn the function/ range selection knob to “
” Range. Insert the red and black test lead
separately to VΩHz and COM input terminal. Press “SELECT” button to choose the Buzzer and Diode
measurement function, displayed as the right pictures.
2. Connect the RED test lead to the positive pole of the tested diode, BLACK test lead to the
negative pole.
3. Read the present test result from LCD.
Note:
a. If the diode is open circuit or the polarity is connected counter, „OL” will be displayed on LCD.
b. When measuring the in-circuit diode, make sure all the power of the tested ciruit has been
turned off and all capacitors are fully discharged.
c. Cut the connection between the test lead and tested circuit at once after measurement.
Range
Display
Test Condition
Diode Forward voltage drop
Forward AC Current: 1.0mA,
Counter Voltage: 3.0V
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Buzzer sound At less than 50Ω
Open Voltage: 0.5V
Overload protection: 250V DC/AC peak value.
Warning: Do not input the voltage at the range for safety.
13. Capacitance (C)
1. Turn the function/ range selection knob to Capacitance Range. Insert the red and black test lead
separately to VΩHz and COM input terminal.
2. Connect the test lead to the tested capacitor in parallel, the tested capacitor value will be
displayed on LCD.
3. If “OL” is displayed on LCD, it indicates the test capacitor value has exceeded the present range
limit or the capacitor is short-circuit, please select the higher range to complete the measurement.
4. Read the present test result from LCD.
Note:
a. When measuring the in-circuit capacitor, make sure all the power of the tested circuit has been
turned off and all capacitors are fully discharged ( Note: no Bar Graph display at this range)
b. It requires longer testing time when measuring the large capacitor at once after measurement.
Range
Accuracy
Resoluton
40nF
±(5.0% + 30)
400nF
4µF
100pF
±(3.5% + 8)
40µF
200µF
10pF
1nF
10nF
±(5.0% + 10)
100nF
Overload protection: 250V DC/AC peak value.
14. Frequency (Hz)
1. Turn the function/range selection knob to Hz Range. Insert the red and black test lead separately
to VΩHz and COM input terminal.
2. Connect the test lead to the tested signal source in parallel. (Note: no Bar Graph display at this
range)
3. When measuring Frequency, press “Hz/DUTY” button to get into the mode of Frequency
measurement, and press “Hz/DUTY” button again to get into the mode of Duty Circlr measurement,
and press the button third to return to the mode of AC current ot voltage measurement.
Note:
a. Do not input the signal more than 60V. Otherwise it is possible to damage the instrument and
endanger the safety of the users
b. Cut the connection between the test lead and tested circuit at once after measurement.
Range
Accuracy
Resolution
100Hz
±(0.5% + 4 cyfry)
0.01Hz
10
1000Hz
0.1Hz
10kHz
1Hz
100kHz
10Hz
1MHz
100Hz
30MHz
1kHz
Input sensitivity: 1.0V
Overload protection: 250 V DC/AC peak value.
15. Temperature Test
1. Turn the function/range selection knob to Temperature
range.
2. Insert the two ends of the temperature sensor into the “VΩHz” and “ uAmA” input terminal,
the positive end into the “ VΩHz” input terminal.
3. Connect the sensor of the temperature cable to the surface or inside of the tested object,
displayed as the right picture.
4. read the present test result from LCD
5. Press “SELECT” button to choose F temperature measurement mode, and press “SELECT” button
again to choose C temperature measurement mode, circulated like this.
Note:
a. Without the signal input, LCD automatically displays the normal temperature. Do not input any
other signal, caution to avoid damaging the instrument or endangering the safety of the users.
b. Do not replace the temperature sensor at will. Otherwise the accuracy can’t be assured.
c. Do not input the voltage at Temperature Range! Otherwise there is the danger to damage the
instrument.
Zakres
Dokładność
-20°C - 400°C
±(1.0% + 5)
400°C - 1000°C
±(1.5% + 15)
0°F - 750°F
±(1.0% + 5)
750°F do 1832°F
±(1.5% + 5)
Rozdzielczość
1°C
1°F
Overload protection: 0.5A/250V
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16. Other Functions and Instrument Maintenance
Other Function:
1. Data Hold
Press “HOLD” button, the present value is held on LCD; Press the button again exit the hold mode
and get in the normal measuring status.
2. Auto Power Off.
Stop working for 15 seconds, the instrument will auto power off, and get into the sleeping mode.
The buzzer inside will sound 5 times one minute before powering off, there is a long sound one
minute late and the instrument gets into the sleeping mode. Press any key to restart the power.
3. Press “REL/RS232” button to get into the Relative Value Measurement mode, Keep holding
“REL/RS232” button more than 2 seconds, RS232 symbol is displayed on LCD, it indicates it is the
status of the instrument connecting with PC, than connect the instrument to PC by USB Cable,
accessory of the instrument, and then, can transmit the measuring data to PC, it is convenient to
record, analyze, process and print the measuring results, etc. Please refer the details to the
description in the software.
Instrument maintenance:
This is a highly precise instrument, do not try to modify the inner circuit at will.
1. Keep the instrument dry, and keep it away from dust and shock.
2. Do not store and use the instrument in high humility, high temperature, combustible,
explosive and strong magnetic places.
3. Clean the surface of the instrument with the damp cloth and gentle detergent, do not use the
strong solvent like the abrasive cleaner and alcohol, etc.
4. Take out the batteries if do not use the instrument for a long time to prevent the batteries from
leaking the liquid to corrode the instrument.
5. When LCD displays “
” symbol, should replace the batteries as the following steps:
a. Loose the screw that fixes the batteries and remove the battery case.
b. Remove the spent 1.5V batteries, and replace them by two same type new batteries.It is better
to use alkaline batteries for lengthening the usage time.
c. Fit on the battery case and lock the screw tightly.
d. The steps of replacing the fuse are same as the above. When replacing the fuse, please use the
same specification, same type of fuse.
Note:
1. Do not input the voltage more than 1000V DC/AC peak value.
2. Do not measure the voltage at the Current, Resistance, Diode and Buzzer range.
3. Do not use this battery before fixing the battery or tightening the bottom case.
4. Please remove the test lead from the tested point and turn the power off before replacing the
battery or fuse.
The instruction manual is subject to change without notice.
The contents in the instruction manual are considered to be correct, if the users find any errors or
pretermissions, etc., please contact the manufacturer.
The manufacturer hereby will not be responsible for any accident and damage caused by the
improper operation.
The functions described in this instruction manual do not be the reason for special usage.
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