AX-18B

INSTRUCTION

Contents

1.

General instructions ............................................................................................ 3

1.1.

Precautions safety measures ............................................................................... 3

1.2.

Protection mechanisms ..................................................................................... 5

2.

Description ...................................................................................................... 6

2.1.

Instrument Familiarization ................................................................................. 6

2.2.

LCD Display .................................................................................................... 6

2.3.

Keypad ......................................................................................................... 7

3.

Function description ........................................................................................... 8

3.1.

General Functions ............................................................................................ 8

3.2.

Measurement Functions ..................................................................................... 8

4.

Technical specifications ..................................................................................... 14

4.1.

General specifications ..................................................................................... 14

4.2.

Measurement specifications .............................................................................. 14

5.

Maintenance ................................................................................................... 17

5.1.

General Maintenance ...................................................................................... 17

5.2.

Fuse replacement ........................................................................................... 18

5.3.

Battery replacement........................................................................................ 18

6.

Accessories ..................................................................................................... 19

2

1. General instructions

This instrument complies with IEC 1010-1 (61010-1@IEC: 2001), CAT. II 1000V and CAT. III 600V overvoltage standards. See Specifications.

To get the best service from this instrument, read carefully this user's manual and respect the detailed safety precautions.

International symbols used on the Meter and in this manual are explained in chapter 1.1.3

1.1 Precautions safety measures

1.1.1 Preliminary

•

Measurement category III is for measurements performed in the building installation.

NOTE: Examples are measurements on distribution boards, circuit-breakers, wiring, including cables, bus-bars, junction boxes, switches, socket-outlets in the fixed installation, and equipment for industrial use and some other equipment, for example, stationary motors with permanent connection to the fixed installation.

•

Measurement category II is for measurements performed on circuits directly connected to the low voltage installation.

NOTE: Examples are measurements on household appliances, portable tools and similar equipment.

•

Measurement category I is for measurements performed on circuits not directly connected to

MAINS.

NOTE: Examples are measurements on circuits not derived from MAINS, and specially protected

(internal) MAINS derived circuits. In the latter case, transient stresses are variable; for that reason, requires that the transient withstand capability of the equipment is made known to the user.

•

When using this Multimeter, the user must observe all normal safety rules concerning:

― Protection against the dangers of electric current.

― Protection of the Multimeter against misuse.

•

For your own safety, only use the test probes supplied with the instrument. Before use, check that they are in good condition.

1.1.2 During use

•

If the meter is used near noise generating equipment, be aware that display may become unstable or indicate large errors.

•

Do not use the meter or test leads if they look damaged.

•

Use the meter only as specified in this manual; otherwise, the protection provided by the meter may be impaired.

•

Use extreme caution when working around bare conductors or bus bars.

•

Do not operate the meter around explosive gas, vapor, or dust.

3

•

Verify a Meter's operation by measuring a known voltage. Do not use the Meter if it operates abnormally. Protection may be impaired. When in doubt, have the Meter serviced.

•

Uses the proper terminals, function, and range for your measurements.

•

When the range of the value to be measured is unknown, check that the range initially set on the multimeter is the highest possible or, wherever possible, choose the autoranging mode.

•

To avoid damages to the instrument, do not exceed the maximum limits of the input values shown in the technical specification tables.

•

When the multimeter is linked to measurement circuits, do not touch unused terminals.

•

Caution when working with voltages above 60Vdc or 30Vac rms. Such voltages pose a shock hazard.

•

When using the probes, keep your fingers behind the finger guards.

•

When making connections, connect the common test lead before connecting the live test lead; when disconnecting, disconnect the live test lead before disconnecting the common test lead.

•

Before changing functions, disconnect the test leads from the circuit under test.

•

For all dc functions, including manual or auto-ranging, to avoid the risk of shock due to possible improper reading, verify the presence of any ac voltages by first using the ac function. Then select a dc voltage range equal to or greater than the ac range.

•

Disconnect circuits power and discharge all high-voltage capacitors before testing resistance, continuity, diodes, or capacitance.

•

Never perform resistance or continuity measurements on live circuits.

•

Before measuring current, check the meter's fuse and turn off power to the circuit before connecting the meter to the circuit.

•

In TV repair work, or when carrying out measurements on power switching circuits, remember that high amplitude voltage pulses at the test points can damage the multimeter. Use of a TV filter will attenuate any such pulses.

•

Use just one 6F22 battery, properly installed in the Meter's battery case, to power the Meter.

•

Replace the battery as soon as the battery indicator ( ) appears. With a low battery, the Meter might produce false readings that can lead to electric shock and personal injury.

•

Do not measure voltages above 600V in Category III, or 1000V in Category II installations.

•

When in REL mode, the “ REL” symbol is displayed. Caution must be used because hazardous voltage may be present.

•

Do not operate the Meter with the case (or part of the case) removed.

1.1.3 Symbols:

Symbols used in this manual and on the instrument:

4

Caution: refer to the instruction manual. Incorrect use may result in damage to the device or its components.

~

AC (Alternating Current)

DC (Direct Current)

AC or DC

Earth ground

Double insulated

Fuse

Conforms to European Union directives

1.1.4 Instructions

•

Remove test leads from the Meter before opening the Meter case or battery cover.

When servicing the Meter, use only specified replacement parts.

•

Before opening up the instrument, always disconnect from all sources of electric current and make sure you are not charged with static electricity, which may destroy internal components.

•

Any adjustment, maintenance or repair work carried out on the meter while it is live should be carried out only by appropriately qualified personnel, after having taken into account the instructions in this present manual.

•

A "qualified person" is someone who is familiar with the installation, construction and operation of the equipment and the hazards involved. He is trained and authorized to energize and de-energize circuits and equipment in accordance with established practices.

•

When the instrument is opened up, remember that some internal capacitors can retain a dangerous potential even after the instrument is switched off.

•

If any faults or abnormalities are observed, take the instrument out of service and ensure that it cannot be used until it has been checked out.

•

If the meter is not going to be used for a long time, take out the battery and do not store the meter in high temperature or high humidity environment.

1.2 Protection mechanisms

This instrument is fitted with various protection mechanisms:

•

Varistor protection for limiting transients of over 1000V at the V

Ω

terminal.

•

A PTC (positive temperature coefficient) resistor protects against permanent overvoltages of up to

1000V during resistance, capacitance, temperature, continuity and diode test measurements.

5

2. Description

2.1 Instrument Familiarization

1) LCD display

2) Keypad

3) Rotary switch

4) Terminals

5) Battery cover

2.2 LCD Display

1) Indicator for AC voltage or current

2) Indicates negative readings

3) Indicator for DC voltage or current

4) The meter is in the Autorange mode in which the meter automatically selects the range with the best resolution.

5) The Meter is in the data transmission mode

6) The meter is in Diode Test mode.

7) The meter is in Continuity Check mode.

6

8) The meter is in Data Hold mode.

9) The meter is in Relative Measurement mode.

10) Display maximum data

11) Display minimum data

12) Low battery indication (Note: When this symbol appears, it means that the battery needs to be replaced.)

13) Measurement units

14) This symbol means that the input is too large for the selected range.

2.3 Keypad

2.3.1 SELECT

I. At

Ω

position

Switches between Resistance measurement, Diode Test and Continuity check.

II. At

A mA

µµµµ

A position

Switches between dc and ac current.

III. Power-up Option

Disables automatic power-off feature.

2.3.2 HOLD/LIGHT

Press it to enter and exit the Data Hold mode. Press it and hold 2 seconds, backlight on; if press it and hold for seconds again, backlight off.

2.3.3 RANGE

At V~, V ,

Ω

, A, mA and

µ

A.

1.

Press RANGE to enter the manual ranging mode.

2.

Press RANGE to step through the ranges available for the selected function.

3.

Press and hold RANGE for 2 seconds to return to autoranging.

2.3.4 EL

Press REL to enter and exit the Relative measurement mode. (Except Hz/DUTY)

2.3.5 MAX/MIN

This key is for measuring maximum value and minimum value. (Except Hz/Duty, Capacitance)

1) Press it to enter Max/Min mode.

2) Press it again; the LCD will display the Maximum Value.

3) Press it again; the LCD will display the Minimum Value.

4) Press and hold it for two seconds, the meter will return to normal measurement state.

7

3. Function description

3.1 General Functions

3.1.1 DATA HOLD mode

Data Hold mode makes the meter stop updating the display. Enabling Data Hold function in autorange mode makes the meter switch to Manual ranging mode, but the full-scale range remains the same. Data Hold function can be cancelled by changing the measurement mode, pressing

RANGE key, or push HOLD/LIGHT key again.

To enter and exit the Data Hold mode:

1) Press HOLD/LIGHT key (short press). Fixes the display on the current value, H is displayed.

2) A second short press returns the meter to normal mode.

3.1.2 Manual ranging and Autorange mode

The Meter has both manual ranging and autorange options.

•

In the autorange mode, the Meter selects the best range for the input detected. This allows you to switch test points without having to reset the range.

•

In the manual ranging mode, you select the range. This allows you to override autorange and lock the meter in a specific range.

•

The Meter defaults to the autorange mode in measurement functions that have more than one range. When the Meter is in the autorange mode, AUTO is displayed.

To enter and exit the manual range mode:

1) Press

RANGE key. The Meter enters the manual ranging mode. AUTO turns off. Each presses of

RANGE key increments the range. When the highest range is reached, the Meter wraps to the lowest range.

2) NOTE: If you manually change the measurement range after entering the Data Hold modes, the Meter exits this mode.

3) To exit the manual ranging mode, press and hold down RANGE key for two seconds. The Meter returns to the autorange mode and AUTO is displayed.

3.1.3 Battery Saver

The Meter enters the "sleep mode" and blanks the display if the Meter is on but not used for

30 minutes.

Press the HOLD /LIGHT key or rotate the rotary switch to wake the meter up.

To disable the Sleep mode, hold down the SELECT key while turning the meter on.

3.1.4 Relative measurement mode

The Meter will display relative measurement in all functions except frequency.

8

To enter and exit the relative measurement mode:

1) With the Meter in the desired function, touch the test leads to the circuit on which you want future measurement to be based.

2) Press REL key to store the measured value and activate the relative measurement mode.

The difference between the reference value and subsequent reading is displayed.

3) Press REL key for more than 2 seconds to return the Meter to normal operation.

3.2 Measurement Functions

3.2.1 AC and DC Voltage measurement

To avoid electrical shock and/or damage to the instrument, do not attempt to take any voltage measurement that might exceeds 1000Vdc or 1000Vac rms.

To avoid electrical shock and/or damage to the instrument, do not apply more than 1000Vdc or 1000Vac rms between the common terminal and the earth

ground.

The Meter's voltage ranges are 600.0mV, 6.000V, 60.00V, 600.0V and 1000V. (AC 600.0mV range only exists in manual ranging mode).

To measure ac or dc voltage:

1) Set rotary switch to the DCV, ACV or DCmV range.

2) Connect the black and red test leads to the COM and V terminals respectively.

3) Connect the test leads to the circuit being measured

4) Read the displayed value. The polarity of red test lead connection will be indicated when making a DCV measurement.

NOTE:

Unstable display may occur especially at 600mV range, even though you do not put test leads into input terminals, in this case, if an erroneous reading is suspected, short the V terminal and the

COM terminal, and make sure the zero display.

For better accuracy when measuring the dc offset of an ac voltage, measure the ac voltage first.

Note the ac voltage range, then manually select a dc voltage range equal to or higher than the ac range. This improves the accuracy of the dc measurement by ensuring that the input protection circuits are not activated.

3.2.2 Resistance measurement

To avoid electrical shock and/or damage to the instrument, disconnect circuit

power and discharge all high-voltage capacitors before measuring resistance.

9

The Meter's resistance ranges are 600.0

Ω

, 6.000k

Ω

, 60.00k

Ω

, 600.0k

Ω

, 6.000M

Ω

and 60.00M

Ω

.

To measure resistance:

1) Set the rotary switch to

Ω

range.

2) Connect the black and red test leads to the COM and V

Ω

terminals respectively.

3) Connect the test leads to the circuit being measured and read the displayed value.

Some tips for measuring resistance:

The measured value of a resistor in a circuit is often different from the resistor's rated value.

This is because the Meter's test current flows through all possible paths between the probe tips.

In order to ensure the best accuracy in measurement of low resistance, short the test leads before measurement and memory the test probe resistance in mind. This necessary to subtract for the resistance of the test leads.

The resistance function can produce enough voltage to forward-bias silicon diode or transistor junctions, causing them to conduct. To avoid this, do not use the 60M

Ω

range for in-circuit resistance measurements.

On 60M

Ω

range, the meter may take a few seconds to stabilize reading. This is normal for high resistance measuring.

When the input is not connected, i.e. at open circuit, the figure "OL" will be displayed for the overrange condition.

3.2.3 Diode Test

To avoid electrical shock and/or damage to the instrument, disconnect circuit

power and discharge all high-voltage capacitors before testing diodes.

To test a diode out of a circuit

1) Set the rotary switch to

Ω

range.

2) Press the SELECT key once to activate Diode Test.

3) Connect the black and red test leads to the COM and V

Ω

terminals respectively.

4) For forward-bias readings on any semiconductor component, place the red test lead on the component's anode and place the black test lead on the component's cathode.

5) The meter will show the approx. forward voltage of the diode.

In a circuit, a good diode should still produce a forward bias reading of 0.5V to 0.8V; however, the reverse-bias reading can vary depending on the resistance of other pathways between the probe tips.

10

3.2.4 Continuity Check

To avoid electrical shock and/or damage to the instrument, disconnect circuit

power and discharge all high-voltage capacitors before testing for Continuity.

To test for continuity:

1) Set the rotary switch to

Ω

range.

2) Press the SELECT key twice to activate Continuity Check.

3) Connect the black and red test leads to the COM and

Ω

terminals respectively.

4) Connect the test leads to the resistance in the circuit being measured.

5) When the test lead to the circuit is below 50

Ω

, a continuous beeping will indicate it.

Note:

Continuity test is available to check open/short of the circuit.

3.2.5 Capacitance measurement

To avoid electrical shock and/or damage to the instrument, disconnect circuit power and discharge all high-voltage capacitors before measuring capacitance.

Use the dc voltage function to confirm that the capacitor is discharged.

The Meter's capacitance ranges are 60.00nF, 600.0nF, 6.000

µ

F, 60.00

µ

F and 300.0

µ

F.

To measure capacitance:

1) Set the rotary switch to range.

2) Connect the black and red test leads to the COM and terminals respectively (or you can use capacitor test lead).

3) Connect the test leads to the capacitor being measured and read the displayed value.

Some tips for measuring capacitance:

The meter may take a few seconds to stabilize reading. This is normal for high capacitance measuring.

To improve the accuracy of measurements less than 60nF, subtract the residual capacitance of the

Meter and leads.

Below 600pF, the accuracy of measurements is unspecified.

3.2.6 Frequency and Duty Cycle measurement

Do not measure Frequency on high voltage (>1000V) to avoid electrical shock

hazard and/or damage to the instrument.

The Meter can measure Frequency or Duty Cycle while making either an AC Voltage or AC Current measurement.

To measure frequency or Duty Cycle:

11

1) With the meter in the desired function (AC Voltage or AC Current), press the Hz/DUTY key.

2) Read the frequency of the AC signal on the display.

3) To make a duty cycle measurement, press the Hz/DUTY key again.

4) Read the percent of duty cycle on the display..

5) Set the rotary switch to the Hz range.

6) Insert the black and red test leads into the COM and Hz input terminals.

7) Connect the test leads tip in parallel with the circuit to be measured. And don’t touch any electrical conductors.

8) At frequency measuring status, press Hz/DUTY one time then meter enters duty cycle measuring status, press it again then return to frequency measuring status.

9) Read the result directly from the display.

Note:

In noisy environment, it is preferable to use shield cable for measuring small signal

3.2.7 Temperature measurement

To avoid electrical shock and/or damage to the instrument, do not apply more than 250Vdc or 250Vac rms between the °C terminal and the COM terminal.

To avoid electrical shock, do not use this instrument when voltages at the measurement surface exceed 60v dc or 24v rms. Ac.

To avoid damage or burns. Do not make temperature measurement in microwave

ovens.

To measure temperature:

1) Set the rotary switch to °

C

range and the LCD will show the current environment temperature.

2) Insert ‘K’ type thermocouples into the COM terminal and °

C

terminal (or you can insert it by using Multi Function Socket)Takings care to observe the correct polarity.

3) Touch the object with the thermocouple probe for measurement.

4) Read the stable reading from LCD.

3.2.8 Current measurement

To avoid damage to the Meter or injury if the fuse blows, never attempt an incircuit current measurement where the open-circuit potential to earth is greater than 250V.

To avoid damage to the meter, check the meter's fuse before proceeding. Use the proper terminals, function, and range for your measurement. Never place the probes in parallel with a circuit or component when the leads are plugged into the

current terminals.

12

The Meter's current ranges are 600.0

µ

A, 6000

µ

A, 60.00mA, 600.0mA, 6.000A and 10.00A.

To measure current:

1) Turn off power to the circuit. Discharge all high voltage capacitors.

2) Set the rotary switch to the

µ

A, mA or A range.

3) Press the SELECT key to select DCA or ACA measuring mode.

4) Connect the black test lead to the COM terminal and the red test leads to the mA terminal for a maximum of 600mA. For a maximum of 10A, move the red test lead to the a terminal.

5) Break the circuit path to be tested.

Touch the black probe to the more negative side of the break; touch the red probe to the more positive side of the break. (Reversing the leads will give a negative reading, but will not damage the Meter.)

6) Turn on power to the circuit; then read the display. Be sure to note the measurement units at the right side of the display (

µ

A, mA or A). When only the figure "OL" displayed, it indicates overrange situation and the higher range has to be selected.

7) Turn off power to the circuit and discharge all high voltage capacitors. Remove the Meter and restore the circuit to normal operation.

3.2.9 PC Link

The meter has serial data output function. It can be connected with PC by USB interface, so the measured data can be recorded, analyzed, processed and printed by PC. Before use this function, you need install the PC-Link software and USB driver in your PC.

Press the Hz/DUTY key while turn on the meter, the meter enter PC-Link mode, the symbol

“PC-LINK” will appear on LCD, and the serial data output function is active.

PC-LINK SOFT OPERATING MANUAL

1) Make sure the two Install USB driver and Install software files in the attached CD successfully installed before any measurement.

2) Keep the meter in “OFF” status, pressing the HZ/DUTY key while turn on the meter and the symbol “ PC-LINK” will appear on the LCD if the serial data output function is active.

3) Note: If we want to enable the serial data output function during measuring,

we have to turn off

the meter first, then operate according to step2.

4) Connect the meter’s OPTICAL PORT and computer USB port with the USB line.

5) Run the PC-LINK software, click the SET menu. Select the System Set. Thenselect the proper

COM port in the

Serial Port Select. As for the proper COMport, we can view it in the Device

Manager by following these steps.

•

Right-click the My Computer icon on the Windows desktop, and then click Properties.

•

Click the Hardware tab and then click Device Manager.

13

•

Scroll through the list of installed devices till you locate the Ports (Com and LPT) entry. Click the

plus (+) beside this entry to view the installed ports, If no errors occur, the Sunplus USB to Serial

COM Port (COM x) will appear, COM x is just the proper port, here x is a specific number.

6) Select the default sampling rate or you can select other desired sampling rate.

7) Now press the Start in the PC-LINK SOFT to measure and view the synchronic data or graph in the software interface.

8) To disable the serial data output function, switch the meter to OFF location first.

9) More information about the PC-LINK SOFT, please refer to the Help topic including in the SOFT

4 Technical specifications

4.1 General specifications

Environment conditions:

1000V CAT. II and 600V CAT. III

Pollution degree: 2

Altitude < 2000m

Operating temperature: 0~40°

C

, 32°~122°

F

(<80% RH, <10° non-condensing)

Storage temperature: -10~60

° C

, 14°~140°

F

(<70% RH, battery removed)

Temperature Coefficient: 0.1

×

(specified accuracy) /

°

C (<18° C or >28° C )

MAX. Voltage between terminals and earth ground: 700V AC rms or 1000V DC.

Fuse Protection:

µ

A and mA: F 750mA/250V

∅

5

×

20; A: F 10A/250V

∅

6.35

×

31.8.

Sample Rate: 3 times/sec for digital data.

Display: 3 5/6 digits LCD display. Automatic indication of functions and symbols.

Range selection: automatic and manual.

Over Range indication: LCD will display "OL".

Low battery indication: The " " is displayed when the battery is under the proper operation range.

Polarity indication: "

−

" displayed automatically.

Power source: 9V

Battery type: 6F22.

Dimensions: 180(L)

×

85(W)

×

40(H) mm.

Weight: 310g. Approx. (battery included).

4.2 Measurement specifications

Accuracy is specified for one year after calibration, at operating temperatures of 18°

C

to 28°

C

, with relative humidity at 0% to 75%.

Accuracy specifications take the form of: ± (% of Reading + Number of Least Significant Digits)

14

4.2.1 Voltage

DCV:

Range

600mV

6V

60V

600V

1000V

Resolution

0.1mV

1mV

10mV

100mV

1V

99.99Hz

999.9Hz

9.999kHz

0.01 Hz

0.1 Hz

0.001kHz

99.99kHz

999.9kHz

0.01kHz

0.1kHz

Overload Protection: 250V dc or 250V ac rms

Accuracy

±(0.5% of rdg +8 digits)

±(0.8% of rdg +5 digits)

±(1.0% of rdg +10 digits)

ACV:

Range

600mV

Resolution

0.1mV

Accuracy

±(3.0% of rdg + 3 digits)

Manual Range only

6V

60V

1mV

10mV

±(1.0% of rdg + 3 digits)

600V

700V

100mV

1V ±(1.5% of rdg + 3 digits)

1) Frequency Range for ACV: 40Hz~400Hz.

2) Response for ACV: Average, calibrated in rms of sine wave.

3) Overload Protection: 1000V dc or 700V ac rms.

4) Input Impedance (Nominal): DC voltage: >10M

Ω

; AC voltage: >10M

Ω

5) Common Mode Rejection Ratio: DC voltage: >100dB at dc, 50 or 60 Hz; AC voltage: >60dB at dc,

50 or 60 Hz

6) Normal Mode Rejection Ratio: DC voltage: >45dB at 50 or 60Hz

4.2.2 Frequency (10Hz-1MHz)

Range Resolution Accuracy

±(0.1% of rdg+3digits)

15

4.2.3 Resistance

Range

600.0

Ω

6.000k

Ω

60.00k

Ω

600.0k

Ω

6.000M

Ω

60.00M

Ω

Resolution

0.1

Ω

1

Ω

10

Ω

100

Ω

1k

Ω

10k

Ω

Overload Protection: 250V dc or 250V ac rms

4.2.4 Diode Test

Range

1 V

Resolution

0.001V

Accuracy

±(0.5% of rdg+3 digits)

±(0.5% of rdg+2 digits)

±(1.5% of rdg+3 digits)

Accuracy

1.0% uncertainty

Test Condition: Forward DC current approximately 1mA. Reversed DC voltage approximately 1.5V.

Overload Protection: 250V dc or 250V ac rms

4.2.5 Continuity Check

Range Resolution

600

Ω

0.1

Ω

Description: Continuity beeper≤50

Ω

Overload Protection: 250V dc or 250V ac rms

4.2.6 Temperature

Range Resolution

Test Condition

Open circuit voltage: approx. 0.5V

Accuracy

-55 ~0

1 ~400

401 ~1000 1° C ±2.0% of rdg

Note: The specifications of temperature don’t include thermocouple errors.

Overload Protection: 250V dc or 250V ac rms

4.2.7 Capacitance

Range

60nF

Resolution

10pF

Accuracy

±(3.0% of rdg+20 digits)

600nF

6

µ

F

60

µ

F

300

µ

F

100pF

1nF

10nF

100nF

0.1°C

±(5.0% of rdg + 4 )

±(2.0% of rdg+ 3 )

± (3.0% of rdg+10 digits)

± (5.0% of rdg+10 digits)

16

Overload Protection: 250V dc or 250V ac rms

4.2.8 Current

DCA:

Range

600

µ

A

6000

µ

A

60mA

600mA

6A

10A

Resolution

0.1

µ

A

1

µ

A

0.01mA

0.1mA

1mA

10mA

Accuracy

±(1.5% of rdg+3 digits)

±(1.8% of rdg+5 digits)

±(2.0% of rdg+5 digits)

ACA:

Range

600

µ

A

6000

µ

A

60mA

600mA

Resolution

0.1

µ

A

1

µ

A

0.01mA

0.1mA

Accuracy

±(1.8% of rdg+5 digits)

±(2.0% of rdg+8 digits)

6A 1mA

±(3.0% of rdg+8 digits)

10A 10mA

1. Frequency Range for ACA: 40Hz-400Hz

2. Response for ACA: Average, calibrated in rms of sine wave

3. Overload protection: F 10A/600V fuse for 10A range. F 750mA/600V fuse for

µ

A and mA ranges.

Maximum input current: 600mA dc or 600mA ac rms for

µ

A and mA ranges, 10A dc or 10A ac rms for 10A ranges.

For measurements>6A, 4 minutes maximum ON to measure 10 minutes OFF; Above 10A unspecified.

5. Maintenance

This section provides basic maintenance information, including fuse and battery replacement instructions.

Do not attempt to repair or service your Meter unless you are qualified to do so and have the relevant calibration, performance test, and service information.

5.1 General Maintenance

To avoid electrical shock or damage to the meter, do not get water inside the

case. Remove the test leads and any input signals before opening the case

Periodically wipe the case with a damp cloth and mild detergent. Do not use abrasives or solvents.

Dirt or moisture in the terminals can affect readings.

17

To clean the terminals:

Turn the meter off and remove all test leads.

Shake out any dirt that may be in the terminals.

Soak a new swab with a cleaning and oiling agent (such as WD-40).

Work the swab around in each terminal. The oiling agent insulates the terminals from moisturerelated contamination.

5.2 Fuse replacement

Before replacing the fuse, disconnect test leads and/or any connectors from any

circuit under test. To prevent damage or injury replace the fuse only with

specified ratings.

1. Set rotary switch to the OFF position.

2. Disconnect test leads and/or any connectors from the terminals.

3. Use a screwdriver to unlock the four screws on the rear cover.

4. Take out the rear cover from the meter.

5. Remove the fuse by gently prying one end loose, then sliding the fuse out of its bracket.

6. Install the replacement fuses only with specified ratings: F 10A/600V

∅

6.3

×

32 and F 750mA/600V

∅

5

×

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7. Rejoin the rear cover and tighten the screws.

5.3 Battery replacement

To avoid false readings, which could lead to possible electric shock or personal injury, replace the battery as soon as the battery indicator ( ) appears.

Before replacing the battery, disconnect test leads and/or any connectors from any circuit under test, turn the meter off and remove test leads from the input

terminals.

1. Set rotary switch to the OFF position.

2. Disconnect test leads and/or any connectors from the terminals.

3. Use a screwdriver to unlock the two screws on the battery cover.

4. Take out the battery cover from the meter.

5. Remove the used battery.

6. Replace with one new 9V battery (6F22).

7. Rejoin the battery cover and tighten the screws.

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6. Accessories

Delivered with the multimeter:

¥User's manual

¥Test leads

¥"K" type Thermocouple

¥Capacitor test lead

PC-Link software CD

One piece

One piece

One piece

One piece

One piece

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