Axio MET AX-355 Instruction Manual

AC/DC TRUE RMS CLAMP METER

AX-355

INSTRUCTION MANUAL

CONTENTS

1. Measuring Limits ................................................................................................ 3

2. Safety Information .............................................................................................. 3

3. Features .......................................................................................................... 5

4. Instrument Layout .............................................................................................. 6

5. Specifications .................................................................................................... 6

6. DC Current Measurement ...................................................................................... 9

7. AC Current Measurement ..................................................................................... 10

8. DC Voltage Measurement ..................................................................................... 11

9. AC Voltage Measurement ..................................................................................... 12

10. Resistance Measurement .................................................................................... 13

11. Capacitance Measurement ................................................................................. 14

12. Frequency Measurement .................................................................................... 15

13. temperature Measurement ................................................................................. 16

14. Diode Test ..................................................................................................... 16

15. Continuity testing ............................................................................................ 17

16. Data Hold Functions ......................................................................................... 18

17. Peak Hold Functions ......................................................................................... 18

18. LCD Backlight ................................................................................................. 19

19. Auto Power Off ............................................................................................... 19

20. Battery Replacement ........................................................................................ 19

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1. Measuring Limits

DC Amperem: 0.01A to 1000A

AC Amperem: 0.01A to 1000A

DC Voltage: 0.1mV to 600V

AC Voltage: 0.1mV to 600V

Resistance: 0,1Ω to 400MΩ

Capacitance: 0.001nF to40mF

Frequency: 0.001 kHz to 4kHz

Temperature: -40°C to 1000°C

-40 °F to 1832 °F

2. Safety Information

His manual contains information that must be followed for operating the meter safely and
maintaining the meter in a safe operating condition. If the meter is not used in a manner specified
in this manual, the protection provided by the meter may be impaired.

The Model has been designed and complies with IEC 61010-1 and EN 61010-1. Safety requirements
for Electronic measuring Apparatus.

WARNING

• Read through the operating instructions thoroughly and understand the instruction before
operating the meter.

• Keep the manual at hand so as to enable quick reference when necessary.

• Ensure that the use of the meter is in its intended applications and follow measurement

procedures described in this manual.

• Follow all safety and operating instructions to ensure maximum personal safety during the use and
operation to the meter.

• Fallure to follow the above instructions may cause injury, instrument damage and/or damage to
equipment under test.

• The symbol indicated on the meter means that the user must refer to related parts in the manual
for safe operation of the meter. Be sure to carefully read the instructions following each symbol in
this manual.

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DANGER is reserved for conditions and actions that are likely to cause serious or

fatal injury.

WARNING is reserved for conditions and actions that are likely to cause serious

or fatal injury.

CAUTION is reserved for conditions and actions that are likely to cause minor

injury.

DANGER :

• Never use the meter to measure voltages on a circuit above the maximum allowable input value
on any function.

• Do not exceed the maximum allowable input of any measurement range.

• Never touch exposed wiring connections or any live circuit when attempting to take

measurements.

• Do not attempt to make measurements in flammable gaseous areas, fumes, vapor or dust. The use
of the instrument in these areas may cause sparking, which can lead to an explosion.

• Do not attempt to use the instrument if its surface or your hand is wet.

• Never open the battery compartment cover when making measurements.

WARNING:

• Always inspect the meter and test Leeds for any signs of damage or abnormality before use. If the
meter or its accessories have any structural defects such as broken test leads, cracked cases,
exposed metal parts or the display is not reading do not attempt to make measurements.

• Do not turn the function switch whilst test leads are connected to the meter.

• Do not install substitute parts or make modifications to the meter. Return the meter to your

distributor for repair or re-calibration.

• Ensure the meter is switch off before opening the battery cover when replacing the battery.

• Never replace a battery in the surface of the meter is wet or moist.

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CAUTION:

• Before making measurements ensure that the function selector switch is set on the appropriate
range position

• Always make sure that the plug of each test lead is inserted fully into the appropriate terminal of
the meter.

• Ensure that the function selector switch is set to the “OFF” position after use. When the meter
will not be in use for a long period of time, place it in storage after removing the battery.

• Do not expose the meter to direct sunlight, extreme temperatures or moisture.

• Do not use abrasives or solvents on the meter. To clean it use a damp cloth and mild detergent

only.

Qualified and trained service technicians should only perform calibrations and repair of the meter.

3. FEATURES

• True RMS measurement of AC Current and AC Voltage

• Large 4000 count LCD display with a bargraph and a bright white LED backlight.

• Wide measuring range from 0,01A AC/DC up to 1000A AC/DC

• Measures AC and DC Voltage up to 600 volts.

• Measures resistance from 0,01Ω up to 40MΩ

• Capacitance measurements up to 40mF

• Temperature measurement from -40°C to +1000°C and -40 °F to +1832°F

• Designed to the international safety standard IEC61010 CAT III 600V/CAT III 1000V.

Pollution degree: 2

• Auto Power Off after approximately 20 minutes to conserve battery life.

• Continuity Buzzer and Diode Test

• Frequency measurement up to 4kHz.

• Peak Hold to record the minimum and maximum readings for current and voltage.

• Data Hold switch used to freezer reading on display.

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4. INSTRUMENT LAYOUT

5. SPECIFICATION

Clamp Size 30cm opening approx.

Diode Test: Test Current of 0.3mA typical

Open circuit voltage 1.5V DC

Continuity Check: Threshold < 35Ω, Test current < 1mA

Low Battery Indication: is displayed

Over range Indication: “OL” is displayed

Measurements Rate 2 per second, normal

Input Impedance: 10MΩ (VDC and VAD)

Display: 4000 count LCD

AC Current: 50/60Hz(ACC)

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AC Voltage Bandwidth: 50/60Hz(VAC)

Operating Temperature: -10°C to 50°C (14°F to 122°F)

Storage Temperature: -30°C to 60°C ( -22°F to 140°F)

Relative Humidity: Up to 85%

Over Voltage: Category III 600V

Battery: One DC 9V IEC6F22 1604 Battery

Auto Power OFF: Approx.20 minutes

Dimensions: 229x60x49 mm

Weight: 100g

DC Current:

Range Measuring Range Resolution Accuracy(% of Reading)

40A 0 ~ 40.00A 0.01A

400A 0 ~ 400.0A 0.1A

1000A 0 ~ 1000A 1A

AC Current:

Range Measuring Range Resolution Accuracy(% of Reading)

40A 0 ~ 40.00A 0.01A

400A 0 ~ 400.0A 0.1A

1000A 0 ~ 1000A 1A

DC Voltage:

Range Measuring Range Resolution Accuracy(% of Reading)

400mV 0 ~ 400.00mV 0.1mV

4V 0 ~ 4.000V 0.001V

40V 0 ~ 40.00V 0.01V

400V 0 ~ 400.0V 0.1V

600V 0 ~ 600V 1V

±(2.0% + 10 cyfr)
±(2.8% + 8 cyfr)
±(3.0% + 8 cyfr)

±(2.0% + 10 cyfr)
±(2.8% + 8 cyfr)
±(3.0% + 8 cyfr)

±(1.0% + 10 cyfr)
±(1.5% + 8 cyfr)

±(2.0% + 8 cyfr)

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AC Voltage:

Range Measuring Range Resolution Accuracy(% of Reading)

400mV 0 ~ 400.0mV 0.1mV

4V 0 ~ 4.000V 0.001V

40V 0 ~ 40.00V 0.01V

400V 0 ~ 400.0V 0.1V

600V 0 ~ 600V 1V

Note: No Automating on 400mV AC Range

Resistance:

Range Measuring Range Resolution Accuracy(% of Reading)
400Ω 0 ~ 400.0Ω 0.1Ω ±(1.0% + 4 cyfry)
4kΩ 0 ~ 4.000kΩ 1Ω ±(1.5% + 2 cyfry)
40kΩ 0 ~ 40.00kΩ 10Ω
400kΩ 0 ~ 400.0kΩ 100Ω
4MΩ 0 ~ 4.000MΩ 1kΩ ±(2.5% + 5 cyfr)
40MΩ 0 ~ 40.00MΩ 10kΩ ±(3.5% + 10 cyfr)

Capacitance:

±(1.0% + 10 cyfr)
±(1.5% + 8 cyfr)

±(2.0% + 8 cyfr)

Range Measuring Range Resolution Accuracy(%of Reading)

4nF 0 ~ 4.000nF 0.001nF

40nF 0 ~ 40.00nF 0.01nF

400nF 0 ~ 400.0nF 0.1nF
4µF 0 ~ 4.000µF 0.001µF
40µF 0 ~ 40.00µF 0.01µF
400µF 0 ~ 400.0µF 0.1µF ±(4.0% + 10 cyfr)

4mF 0 ~ 4.000mF 0.001mF

40mF 0 ~ 40.00mF 0.01mF

±(5.0% + 30 cyfr)
±(5.0% + 20 cyfr)
±(3.0% + 5 cyfr)

±(4.5% + 10 cyfr)
±(5.0% + 10 cyfr)

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Frequancy:

Range Measuring Range Resolution Accuracy(% of Reading)

4kHz 0 ~ 4.000kHz 0.001kHz

Temperature:

Range Measuring Range Resolution Accuracy(% of Reading)

°C -40°C ~ 1000°C 1°C ±(2.5% + 3°C)
°F -40°F ~ 1832°F 1°F ±(2.5% + 5°F)

6. DC CURRENT MEASUREMENT

WARNING: Ensure that the test Leeds are disconnected from the meter before making

current measurements.

1. Set the function switch to or or range position, and make sure that the
current under test does not exceed the upper limit of the measuring range you hale selected.
The meter automatically defaults to DC Current.

2. Press the button once the sign will appear on the LCD indicating Rang is zero.

±(1.5% + 2 cyfry)

Czułość: 5V rms min.

3. Press the trigger to open up the transformer jaws and clamp around the single conductor under
test.

4. Read the display.

Note:

• During current measurements keep the transformer jaws fully closed, otherwise this affect the
accuracy of the measurement.

• When large current the transformer jaws may buzz. This is not a fault and does not affect the
accuracy of the reading.

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7. AC TRUE RMS CURRENT MEASUREMENT

WARNING: Ensure that the test leads are disconnected from the meter before making

current measurements.

1. Set the function switch to or or range position, and make sure that the
current under test does not exceed the upper limit of the measuring range you hale selected.

2. Press the button to select the AC Current range. The meter automatically defaults to DC
Current.

3. Press the trigger to open up the transformer jaws and clamp around the single conductor under
test.

4. Read the display.

Note:

• During current measurements keep the transformer jaws fully closed, otherwise this will affect
the accuracy of the measurement.

• When large currents the transformer jaws may buzz. This is not a fault and does not affect the
accuracy of default to “Auto Range” mode.

• The meter is set
minimum Reading on the AC volt range. See page 19 for further instructions for “PEAK” Hold
function.

hold button will allow the user to record the peak maximum and

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8. DC VOLTAGE MEASUREMENT

1. Set the function switch to range position. The meter automatically defaults to DC
Volts.

2. Insert the red test leads into the input terminal and the black lead to the

terminal.

3. Connected the other end of the test leads to the circuit under test.

4. Read the display, if a “-“ sign is displayed the red lead is the negative potential.

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9. AC TRUE RMS VOLTAGE MEASUREMENT

1. Set the function switch to range position.

2. Press the button to select the AC Volt range. The meter automatically defaults to DC
Volts.

3. Insert the red test lead into the input terminal and the black lead to the

terminal.

4. Connect the other end of the test leads to the circuit under test. Take the reading on the display.

Note:

• The meter is set to default to “Auto Range” mode.

• Pressing the hold button will allow the user to record the peak maximum and minimum

Reading on the AC volt range. See page 19 for further instructions for “ PEAK” Hold function.

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10. RESISTANCE MEASUREMENT

1. Set the function switch to range position. The meter automatically defaults to
resistance range.

2. Insert the test lead into the input terminal and the black lead to the
terminal.

3. Connect the other end of the test leads to the circuit or component under test. Take the reading
on the display.

Note:

•The meter is set to default to “Auto Range” mode.

• WARNING before attempting to make a resistance measurement, ensure there is no voltage

present on the circuit under test.

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11. CAPACITANCE MEASUREMENT

1. Set the function switch to range position.

2. Insert the red test lead into the input terminal and the black lead to the

terminal.

3. Connect the other end of the test leads to the circuit or component under test. Take the reading
on the display.

Note:

• In Capacitance range the meter is Auto Ranging only.

• CAUTION to avoid damage to the meter or the equipment under test remove all Power

from the circuit and discharge all capacitors before measuring capacitance.

• Large value capacitors should be discharged through an appropriate resistance load. Use the DC
Voltage function to confirm that the capacitor is discharged.

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12. FREQUENCY MEASUREMENT

1. Set the function switch to range position. The meter automatically defaults to
Frequency range.

2. Press the button for 3 seconds to select the Frequency range. The meter automatically
defaults to DC Volts.

3. Insert the red test lead into the . Input terminal and the black lead to the

terminal.

4. Connect the other end of the test leads to the circuit or component under test. Take the reading
on the display.

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13. TEMPERATURE MEASUREMENT

1. Set the function switch to range position. The meter automatically defaults to °C range.

2. Insert the meter white temperature adaptor into the input terminal and the

terminal. Ensure that the “-“ marking on the adaptor is inserted into the terminal

and the „+” marking on the adapter is inserted into the input terminal.

3. Connect any K-Type probe into the meter adapter and measure the temperature of the apparatus
or area required.

4. Read the temperature directly on the display.

5. To change the measuring unit from °C to °F . Press the button to select the °F unit.

Note:

• The meter is set to default to “Auto Range” mode.

14. DIODE TEST

1. Set the function switch to range position

2. Press the button to select the Diode Test range. The meter automatically defaults to
Resistance.

3. Insert the red test read into the

terminal.

input terminal and the black lead to the

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4. Connect the other end of the test leads to the component under test. Read the display

Note:

• Use the diode test to check diodes, transistors, silicon controlled rectifiers (SCR’s) and other
semiconductor devices.

• The test sends a current through a semiconductor junction, then measure the junction’s voltage
drop.

• Normal forward voltage drop (forward bias) for a good silicon diode is between 0.4V to 0.9V.
A reading higher then that indicates a leaky (defective) diode. A zero reading indicates a shorted
diode.

• Reverse the test leads connection (reverse bias) across the diode. The display shows “OL” if the
diode is good. Any other readings indicate the diode is shorted or resistive (defective).

15. CONTINUITY TESTING

1. Set the function switch to range position.

2. Press the button to select the Continuity Test range. The meter automatically defaults to
Resistance.

3. Insert the red test lead into the input terminal and the black lead to the

terminal.

4. Short the tip of the test leads and make sure the display reads “)” and the buzzer beeps.

5. Connected the tip of the test leads to the circuit or component under test. The display reads the
resistance and the buzzer beeps when the reading is no more than about 350.

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Note:

• Using resistance and continuity function in a live circuit will produce false results and may damage
the instrument.

• In many cases the suspicious components must be disconnected from the circuit under test to
obtain accurate results.

• WARNING Before attempting to make a test ensure there is no voltage present on the
circuit.

16. DATA HOLD

This is a function used to freeze the reading on the display, ideal for later viewing.

1. Press the button once. When the Hold is activated, the meter beeps, freezes the Reading
and displays the „HOLD”. Indicator on the LCD.

2. To deactivate the “HOLD” function, press button once, the meter will beep and the meter
will start Reading New measurements.

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17. PEAK HOLD

This is a function used to record the maximum and minimum readings on the display for the voltage
and current ranges.

1. Press the button once. This will record the „PEAK” maxiumum, the meter beeps and
display the „P-MAX” indicator on the LCD.

2. Press the button again. This will record the „PEAK” minimum, the meter beeps and
display the „ P MIN” indicator on the LCD.

3. To deactivate the “PEAK” function, press button for 3 seconds the meter will beep and the meter
will start reading new measurements.

18. LCD BACKLIGHT

The backlight is ideally used in dark or dimly lit areas.

1. Press button for 3 seconds, and the Wright white light will come on.

2. To turn the backlight press the button for 3 seconds.

Note:

The use of the backlight will reduce the battery life considerably.

19. AUTO POWER OFF

This feature automatically turns off the meter after approximately 20 minutes from the last
measurement taken. To turns off the meter press any button or move the rotary switch to any
position. Ensure the test leads are disconnected from any circuit to avoid injury or meter damage.

20. BATTERY REPLACEMENT

When the sign appears on the LCD this indicates the battery should be replaced. Use the
following procedure to replace the standard 9V battery (IEC 6F 22) battery.

1. Disconnect the test leads from any live source and remove the leads from the input terminals.

2. Rotate the function switch to the position.

3. The battery cover is secured to the bottom of the case by a screw. Using a screwdriver remove
the screw from the battery cover and remove the battery cover from the meter.

4. Remove the old battery and replace it with a new IEC 6F 22 9V battery.

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5. Replace the battery cover and reinstall the screw.

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