DM07 - Multimeter Tacklife - Free user manual and instructions

Technical Features	Tacklife DM07 digital multimeter with LCD display, measuring AC/DC voltage, AC/DC current, resistance, continuity, and diode test.
Usage	Ideal for electrical work, DIY, and electronic diagnostics. Easy to use with selection buttons for different functions.
Maintenance and Repair	Regularly check the batteries and replace them if necessary. Clean the casing with a soft cloth. Do not open the device without proper training.
Safety	Follow electrical safety standards. Do not use on circuits with voltage exceeding the device's capacity. Use insulating gloves if necessary.
General Information	2-year warranty. Includes test leads and a user manual. Lightweight and compact design for easy portability.

Frequently Asked Questions - DM07 Tacklife

How do I turn on the Tacklife DM07?

To turn on the Tacklife DM07, press the 'ON\/OFF' button located on the front of the device.

What should I do if the multimeter screen is black?

First, check if the batteries are in good condition and properly installed. If the problem persists, replace the batteries with new ones.

How do I change the measurement units on the Tacklife DM07?

To change the measurement units, use the mode selection button to navigate through the available options.

Why does the multimeter display 'OL'?

'OL' means 'Over Limit', indicating that the measured value exceeds the device's maximum range. Select a higher range if necessary.

How do I perform a voltage measurement?

To measure voltage, select the 'V' mode on the multimeter, then connect the probes to the appropriate measurement points.

The Tacklife DM07 does not measure continuity, what should I do?

Make sure the multimeter is in 'Buzzer' mode for continuity. Also, check that the probes are properly connected.

How do I calibrate the Tacklife DM07?

Calibration must be performed by a professional. If you suspect your device is miscalibrated, contact Tacklife customer service.

Can the Tacklife DM07 measure AC and DC?

Yes, the Tacklife DM07 can measure both AC and DC voltages. Make sure to select the correct mode before measuring.

How do I clean the multimeter?

Use a soft, dry cloth to clean the outside of the multimeter. Avoid using chemicals or water directly on the device.

Where can I find the user manual for the Tacklife DM07?

The user manual can be downloaded from the official Tacklife website or found in the product packaging.

USER MANUAL DM07 Tacklife

This digital multimeter is designed and manufactured in compliance with IEC-61010 safety requirements on electronic measuring instruments and handheld digital multimeters. It is compliant with IEC-61010 requirements pertaining to 600V CAT IV, 1000V CAT. III and requirements on pollution degree 2. Please read carefully this user Manual and pay attention to safety guidelines before operating this meter.

1.1 Safety information

1.1.1 Safety instructions

• Before operating this meter, the operator must observe all standard safety procedures in the two respects below:

A. Safety procedures against electric shock
B. Safety procedures against unintended use

• To ensure your personal safety, please use the test lead that accompanies the meter. Before operating this meter, ensure that the test lead is flawless.

1.1.2 Safety considerations

• When the meter is used in the vicinity of the equipment that produces strong electromagnetic interferences, the readings on the meter will grow unstable and even cause serious errors.
• Don't operate the meter or pen-shaped meter whose appearance is damaged.
• The safety function of the meter will become null if the meter is not properly operated.
• The meter must be operated with great care when working in the vicinity of an exposed conductor or bus line.
• The meter is prohibited from being used in the vicinity of any explosive gas, vapor or dust.
• The measurement must be made with correct input terminals and functions and within the allowable measuring range.
• To prevent the meter from being damaged, the value to be input shall not exceed the extremes allowed by each measuring range.
• When the meter has already been connected to the line being measured, the operator is prohibited from touching the input terminal that is not in service.
• When the voltage measured exceeds 60Vdc or 30Vac (valid value), the operator shall be careful enough to avoid electric shock.
• When making measurements with a test lead, place your fingers behind its protective ring.
• When switching to another measuring range, be sure that test lead has already been removed from the measured circuit.
• For all DC functions, to prevent potential electric shock as a result of incorrect reading, please first use AC functions to check the absence of any AV voltage. Then, select DC voltage measuring range equivalent to or greater than that for AC voltage.
• Before the tests on electric resistance, diode, capacitor or continuity, the operator must cut off the power supply to the circuit to be measured, and discharge all high-voltage capacitors within the circuit to be measured.
• The electric resistance measurement or continuity test cannot be carried out in any live electrical circuit.
• Before the current measurement, the operator must first examine the protective tube of the

meter. Before connecting the meter to the circuit to be measured, the operator must first power off the aforesaid circuit.

• Before repairing TV sets or measuring power switching circuit, the operator must be careful enough to prevent high amplitude voltage impulse from damaging the meter.
• This meter uses 4 × 1.5V AA batteries that must be correctly installed into the battery compartment.
• When + appears, the batteries must be replaced immediately. The low level of a battery will result in incorrect reading on the meter, which is likely to bring electric shock or personal injury to the operator.
• In measurement, category III voltage and category IV voltage shall not exceed 1000V and 600V respectively.
• The meter shall not be in service if its case (or part of its case) is dismantled.

1.1.3 Safety symbol:

The safety symbols that appear on the meter's body and in this Operation Manual:

A	Warning, an important safety symbol. The operator must consult this Operation Manual before using the meter. Unintended use may lead to the damage to the device or its components.
~	AC (alternating current)
=	DC (direct current)
~	AC / DC
±	Ground
回	Double insulation protection
-	Fuse
CE	Compliant with European Union Directive
4	High voltage warning
CAT. III 1000 V	over-voltage protection
CAT. IV 600 V	over-voltage protection

1.1.4 Maintenance practices for safety

• The operator must first pull out the test lead when the meter's case is opened or the battery cover is dismantled.
• The designated replacement parts must be used at the moment of maintenance.
• The operator must cut off all relevant power supplies before opening the meter. At the same time, the operator must avoid damage to the meter's elements by ensure that he himself doesn't carry any static.
• The meter can only be calibrated, repaired and maintained by professionals.
• When the meter's case is opened, the operator must understand the fact that the presence of some capacitance may promise the dangerous voltages even if the power supply to the meter is cut off.
• The operator should stop using and maintain the meter immediately if any abnormality has been

observed on the meter. The operator must see to it that the meter cannot be in service unless it is proved conforming.

• When the meter is left idle for a long period, the operator shall remove the battery and place it in a place free from high temperature and humidity.

1.2 Input protection measures

• The meter can sustain the maximum input voltage of 1000V (DC) or 750V (AC) at the moment of voltage measurement.
• The meter can sustain the maximum AC voltage of 600V or equivalent voltage (valid value) when the tests on frequency, electric resistance, continuity and diode are carried out.
• The protective tube (FF600mA/250V) is used for protection purpose when A and mA current measurements are carried out.

2. A Schematic Diagram for the Meter

This meter is a hand-held digital multi-meter with the function of displaying True RMS. It is a large-screen LCD unit with backlight and illumination light functions so that the user can easily recognize readings. It is equipped with the function of overload protection and the indicator of battery under voltage. Either for professionals, factories, schools, enthusiasts or households, it is an ideal multi-functional meter.

2.1 A Schematic Diagram for the Meter

Physical appearance

1. Non-contact voltage detection area
2. Non-contact voltage indicator
3. LCD screen
4. Key
5. Rotary switch
6. Input socket

2.2 Description of the symbols on the display unit

Symbol	Description
	Battery Under Voltage indicator/ Low Battery To avoid electric shock or personal injury as a result of incorrect reading, promptly replace the battery when the battery under voltage indicator appears.
	Auto power off indicator
	High voltage warning
	Negative input polarity indicator
AC	Input voltage AC
DC	Input voltage DC
	Continuity test mode
	Diode test mode
AUTO	Automatic range measurement mode
	Data hold mode
°C, °F	Unit of temperature(°C: Celsius; °F: Fahrenheit)
%	Duty ratio
NCV	Non-contact AC voltage detection mode

Table.1 Symbols (Continued)

V, mV	V:	V: the unit of volt
	mV:	Millivolt, 1x10-3or 0.001 volt
A, mA, μA	A:	Ampere, the unit of current
	mA:	Milliampere, 1x10-3or 0.001 ampere
	μA:	Microampere, 1x10-6or 0.000001 ampere
Ω, kΩ, MΩ	Ω:	Ohm, the unit of electric resistance
	kΩ:	Kilohm, 1000 Ohm
	MΩ:	Megaohm, 1,000,000 ohm
MkHz	Hz:	Hz, the unit of frequency
	KHz:	KHz, 1x10 Hz
	MHz:	MHz, 1x106Hz or 1000 KHz
mF,μF, nF	F:	Farad, the unit of capacitance
	mF:	Millifarad, 1x10-3or 0.001 farad
	μF:	Microfarad, 1x10-6or 0.000001 farad
	nF:	nF, 1x10-9or 0.000000001 farad

2.3 Description of functional keys

Key	Description of functions
SEL	SEL keys, e. g. TEMP position: °C mode or °F mode. Voltage position or current position: ACV / DCV ACA / DCA →01) : Select the diode or beep on-off mode
HOLD(H)	Press the key to hold the measured value for the current moment Press the key again to cancel this function.
	Press this key for more than 2 seconds, the backlight and the illumination indicator will be on; however, long press the key for more than 2 seconds again, you will turn off backlight and illumination indicator. If you don't press the key at all, the function will automatically be disenabled in 15 seconds.
HZ / %	AC voltage or AC current position: Under AC voltage or AC current measuring state, press this key to select ACV/HZ/% or ACA/HZ/% measurement mode. Frequency positions: HZ or % measurement mode.

2.4 Description of input socket

input socket	Description
COM	All public input terminals to be measured are connected to test leads in black or the public output plugs of exclusive multi-function test sockets. Positive input terminals (connected to a test lead in red) for capacitor
°C / °F VΩHz%	measurement, diode measurement, beep on/off test, temperature measurement, voltage measurement, electric resistance, frequency, duty ratio.
μA mA	μA and mA positive input terminal (connected to a test lead in red).
10A	10A positive input terminal (connected to a test lead in red).

2.5 Accessories

Operation Manual

Test lead

K-Type thermocouple

3. Operational guidelines

3.1 Normal operation

3.1.1 Hold mode

In the hold mode, the reading can be maintained on the display unit. Changing the measurement function position or pressing the key Hold again to exit the hold mode.

Hold mode: entry and exit

1. Press the key “H” and the reading will be held and the symbol “H” will appear on the LCD screen.
2. Press the key " H " again to restore the meter to its status for normal measurement.

3.1.2 Backlight & lighting

The meter is equipped with the functions of backlight and lighting so that the operator can access measurement results even if he is in a darker place. The backlight function can be enabled or disenabled by the steps below:

1. Long press key for more than 2 seconds to enable backlight and illumination light.
2. Long press key for more than 2 seconds again to manually disenable backlight and illumination light; wait for 15 seconds until the backlight and illumination light are automatically disabled.

3.1.3 Auto power off

If no operations are made in 15 minutes following the initialization, the meter will sound to remind the operator to automatically cut off power supply and enter the state of dormancy. The meter can be rebooted when the operator presses H / key in the auto power off mode.

3.2 Measurement guidelines

3.2.1 Measurement of AC voltage and DC voltage

To avoid any electric shock and/or damage to the meter, do not attempt a voltage measurement if the voltage (valid value) is 1,000V for DC current or 750V for AC current.

To avoid any electric shock and/or damage to the meter, don't attempt to impose between any public terminal and ground any voltage whose valid value is over 1, 000V for DC current or 750V for AC current.

The meter provides DC voltage measuring ranges as follows: 600.0mV, 6.000V, 60.00V, 600.0V and 1000V, and AC voltage measuring ranges: 6.000V, 60.00V, 600.0V and 750V.

Measurement of AC voltage or DC voltage.

1. Turn the rotary switch to the position V, Press "SEL" to switch DC / AC voltage function.
2. Connect the test lead in black and test lead in red to COM input socket and V input socket respectively.
3. Use another two ends of the test lead to measure the voltage of the circuit to be measured. (In parallel connection with the circuit to be measured)
4. Read the measured voltage value on LCD screen. When DC voltage measurement is attempted, the display unit will show the voltage polarity of the circuit connected to the pen-shaped meter in red.

Notes:

• Within the measuring range of DC voltage of 600mV and AC voltage of 6V, even if there is no input or no connection to the test lead, the meter will display some information. In this situation, press short circuit "V - Ω" and "COM" terminal to reset the meter to zero.
• Within the AC voltage function, press the key " HZ/%" to measure the frequency of the AC voltage source (40HZ~1KHZ).
• The value of the AC voltage measured with this meter is True RMS (root mean square). These measurements are accurate for sine wave and other waves (without DC offset), square wave, triangular wave and step wave.

3.2.2 Electric resistance measurement

To avoid the meter or the measured equipment from damage, do not attempt a resistance measurement unless the operator has already cut off all power sources for the circuit to be measured and fully discharged all high-voltage capacitors.

Ohm is the unit of electric resistance () .

The measuring ranges of electric resistance of this meter are 600.0 , 6.000k , 60.00kV , 600.0k , 6.000M and 60.00M .

Measurement of electric resistance

1 Turn the rotary switch to the position.
2. Connect the test lead in black and test lead in red to COM input socket and V/Ωinput socket respectively.
3.Use another two ends of the test lead to measure the electric resistance of the circuit to be measured.
4 Read the measured electric resistance value on LCD screen.

Notes:

• The measured value of the electric resistance of the circuit differs a bit from the rated value of the electric resistance.
• To ensure measurement accuracy, in attempting a low resistance measurement, first put two open-shaped meters in short circuit and capture the resistance reading of these short circuits. Then subtract the aforesaid reading from the measured resistance.
• At 60MΩposition, you have to wait a few seconds before the reading grow stable. This is quite normal for a high resistance measurement.
• When the meter is in open circuit, the display unit will show "OL" that indicates the measured value is over the measuring range.

3.2.3 Diode test

To avoid the meter or the measured equipment from damage, do not attempt a diode test unless the operator has already cut off all power sources for the circuit to be measured and fully discharged all high-voltage capacitors.

Diode test outside the circuit:

1. Turn the rotary switch to the position (\rightarrow \rightarrow \rightarrow \rightarrow \rightarrow \rightarrow \rightarrow \rightarrow \rightarrow \rightarrow \rightarrow \rightarrow \rightarrow \rightarrow \rightarrow \rightarrow \rightarrow \rightarrow \rightarrow \rightarrow \rightarrow \rightarrow \rightarrow \rightarrow \rightarrow \rightarrow \rightarrow \rightarrow \rightarrow \rightarrow \rightarrow \rightarrow \rightarrow \rightarrow \rightarrow \rightarrow \rightarrow \rightarrow \rightarrow \rightarrow \rightarrow \rightarrow \rightarrow \rightarrow \rightarrow \rightarrow \rightarrow \rightarrow \rightarrow \rightarrow \rightarrow

2. Connect the test leads in black and in red to COM input socket and V / Ωinput socket respectively.

3. Connect the test leads in black and in red to the positive and negative poles of the diode to be tested respectively.
4. The meter displays the forward bias value of the diode to be tested. If the polarity of the test lead is reversed, the meter will display "OL".

A normal diode still produces a forward voltage drop of 0.5V to 0.8V ; the reverse bias voltage reading depends on the variation in electric resistance of other channels between two pen-shaped meters.

3.2.4 Beep continuity test

To avoid the meter or the measured equipment from damage, do not attempt a beep continuity test unless the operator has already cut off all power sources for the circuit to be measured and fully discharged all high-voltage capacitors.

Steps for a continuity test:

1. Turn the rotary switch to the position
2. Connect the test lead in black and test lead in red to COM input socket and V / Ωinput socket respectively.
3. Use another two ends of the test lead to measure the resistance of the circuit to be measured. If the measured distance is no more than 40 , the sensor LED (green indicator) will be on and the beeper will sound continuously. If the measured resistance is between 40 and 60 , the sensor LED (red indicator) will be on.

3.2.5 Capacitance measurement

To avoid the meter or the measured equipment from damage, do not attempt a capacitance measurement unless the operator has already cut off all power sources for the circuit to be measured and fully discharged all high-voltage capacitors. Use the DC voltage position to determine that all capacitors have been discharged.

The measuring ranges for the capacitance of this meter are 6.000nF, 60.00nF, 600.0nF, 6.000ΩF, 60.00ΩF and 600.0ΩF, 6mF, 100mF.

Measurement of capacitance:

1. Turn the rotary switch to the position
2. Connect the test leads in black and in red to COM input socket and - input socket respectively.
3. Use another two ends of the test lead to measure the capacitance of the capacitor to be measured, and capture the measured value on LCD screen.

Notes:

The measurement of a large capacitance requires a given period of stabilization of reading.
- To avoid damage to the meter, the measurement of a capacitor with polarities requires much attention to its polarity.

3.2.6 Frequency measurement

To avoid any electric shock and/or damage to the meter, do not attempt a frequency measurement if the voltage is over 250V for DC current or AC current (valid value).

Frequency measurement:

1. Turn the rotary switch to the position HZ% , Press "Hz%" to switch HZ or % function.
2. Connect the test leads in black and in red to COM input socket and Hz input socket respectively.
3. Use another two ends of the test lead to measure the frequency of the circuit to be measured.
4. Read the measured frequency on LCD screen.

3.2.7 Current measurement

The meter provides DC current measuring ranges as follows: 60ΩA, 600ΩA, 6mA, 60.00mA, 600.0mA and 10.00A; and AC current measuring ranges: 60ΩA, 600ΩA, 6mA, 60.0mA, 600.0mA and 10.00A.

Measurement of current:

1. Turn the rotary switch to the appropriate position, Press "SEL" to switch DC/AC current function.
2. Connect the test lead in black to COM input socket. Connect the test lead in red to a mA input socket when the measured current is less than 600mA ; connect the test lead in red to a 10A input socket when the measured current is 600mA 10A .
3. Disconnection of the circuit to be measured Connect the test lead in black to the end of disconnected circuit (the voltage is lower) and connect the test lead in red to the end of the disconnected circuit (voltage is higher).
4. Connect the power to the circuit and capture the displayed reading. If the display unit only shows "OL", it means the input is over the selected measuring range. At this moment, turn the rotary switch to a higher measuring range.

Notes:

Within the AC current function, press the key "HZ / %" to measure the frequency of the AC current source (40HZ~1KHZ).

3.2.8 NCV test (non-contact voltage detection)

Turn the rotary switch to NCV position, and place the top of the meter approach the conductor. If the meter detects the AC voltage, the indicators for signal density (high, medium and low) will be on in accordance with the detected density, while the beeper will sounds alarms at different frequencies.

Note:

1. Voltage may still remain in the absence of any indication. The operator shall not rely on non-contact voltage detector to check the presence of voltage. The detection operation may be affected by various factors, including socket design, insulation thickness and type.

2. When the voltage is input into the meter's input terminal, the voltage sensor LED may be on as a result of induced voltage.

3. External sources of interference (like flashlight and motor) may trigger non-contact voltage detection.

3.2.9 Measuring temperature

Put the range switch at the gear of TEMP. Insert the red plug of the thermocouple into the end of ^ C , and insert the black plug of the thermocouple into COM socket. Directly read the temperature value from the display screen after the reading is stable.

Notes:

The maximum measuring temperature for the K-type thermocouple dispatched at random is 25^ , and its instant measuring value can reach 300^ .

4. Technical parameters

4.1 Overall parameters

• Operating environment:
  600V CAT IV and 1000V CAT. III Pollution level: 2Altitude < 2000m
  Working temperature & humidity: 0~40OC (The requirements will not be considered when temperature is less than 10^ and relative humidity is below 80% ).
  Storage temperature & humidity: -10~60OC (batteries shall be removed when RH is below 70%).
• Coefficient of temperature: 0.1 × accuracy / OC (<18 °C or >28 °C).
• Allowable max voltage between terminal to be measured and ground: 1000V DC or 750V AC (valid value)
• Protection of protective tube: mA position: protective tube FF 600mA / 250V; A position protective tube FF 10A / 250V
• Rotation rate: approximately 3 revolutions / second.
• Display unit: 6000 counts displayed on LCD screen. Automatically display the symbol for unit in accordance with measurement function position.
• Outrange indication: the LCD screen will display "OL".
• Battery Low indication: "—" will appear when the battery's voltage is below the normal working voltage.
• Input polarity indication: " - " will automatically appear.
  Power: 4 x 1.5V AA battery
• Dimensions: 190 mm( L) × 89 mm( W) × 50 mm( H) .
• Weight: approximately 380g (inclusive of batteries).

4.2 Precision indicator

Measuring range	Resolution	Accuracy
600 mV	0.1 mV	±(0.5% Reading + 3 digits)
6 V	1 mV
60 V	10 mV
600 V	100 mV
1000 V	1 V	±(0.5% Reading + 3 digits)

Input impedance:10MΩ

Maximal input voltage: 1000Vdc or 750Vac valid value

4.2.2 AC voltage

Measuring range	Resolution	Accuracy
6 V	1 mV	± (0.8% readings +3 digits)
60 V	10 mV
600 V	100 mV	± (1% readings +10 digits)
750 V	1 V

Input impedance:10MΩ

Maximal input voltage: 1000Vdc or 750Vac valid value

Frequency response: 40Hz-1kHz True RMS

4.2.3 Frequency

Measuring range	Resolution	Accuracy
9.999 Hz	0.001 Hz	± (1% Reading + 3 digits)
99.99 Hz	0.01 Hz
999.9 Hz	0.1 Hz
9.999 KHz	0.001 KHz
99.99 KHz	0.01 KHz
999.9 KHz	0.1 KHz
9.999 MHz	0.001 MHz

Input voltage range: 200mV -10V ac valid value

Overload protection: 600V DC / AC

4.2.4 Electric resistance

Measuring range	Resolution	Accuracy
600 Ω	0.1 Ω	± (0.8% Reading + 3 digits)
6 kΩ	1 Ω
60 kΩ	10 Ω
600 kΩ	100 Ω
6 MΩ	1 kΩ
60 MΩ	10 kΩ	± (1.2% Reading + 30 digits)

Overload protection: 600V DC / AC

Open-circuit voltage: 1V

4.2.5 Diode

Functions	Measuring range	Resolution	Testing conditions
Diode test	0-3 V	0.001 V	Forward DC current: approximately 1mA; Open-circuit voltage: approximately 3.2V. The display unit shows the approximate value of the diode's forward voltage drop.

Overload protection: 600V DC / A

4.2.6 Beeper continuity

Functions	Measuring range	Resolution	Description	Testing conditions
0.1	600 Ω	0.1 Ω	When the built-in beeper sounds and the accompanying green indicator is on, the measured resistance shall not be over 30Ω. The red indicator will be on when the resistance is 40Ω-60Ω.	Open-circuit voltage: approximately 1V

Overload protection: 600V DC / AC

4.2.7 Capacitor

Measuring range	Resolution	Accuracy
6 nF	0.001 nF	± (4.0% Reading +30 digits)
60 nF	0.01 nF	± (4.0% Reading +3 digits)
600 nF	0.1 nF
6 μF	1 nF
60 μF	10 nF
600 μF	100 nF
6 mF	1 uF
100 mF	0.01 mF	± (5.0% Reading + 3 digits)

Overload protection: 600V DC / AC

4.2.8 DC current

Measuring range	Resolution	Accuracy
60 μA	0.01 μA
600 μA	0.1 μA	±(0.8% Reading + 3 digits)
6 mA	0.001 mA
60 mA	0.01 mA
600 mA	0.1 mA
10.00 A	10 mA	±(1.2% Reading + 3 digits)

Overload protection: protective tube for mA measuring range (FF600mA/250V); protective tube for 10A measuring range (FF10A/250V).

Maximal input current: mA position: 600mA DC/AC (valid value);

10A position: 10A DC/AC (valid value)

When the measured current is over 5A, the duration of continuous measurement shall not be over 10 seconds. The current measurement shall be carried out 1 minute after the completion of previous measurement.

4.2.9 AC current

Measuring range	Resolution	Accuracy
60 μA	0.01 μA	±(1% Reading + 3 digits)
600 μA	0.1 μA
6 mA	0.001 mA
60 mA	0.01 mA
600 mA	0.1 mA
10 A	10 mA	±(1.5% Reading + 3 digits)

Overload protection: protective casing for mA measuring range (FF600mA / 250V); protective casing for 10A measuring range (FF10A / 250V).

Maximal input voltage: mA position: 600mA DC / AC (valid value);

10A position: 10A DC / AC (valid value)

When the measured current is over 5A, the duration of continuous measurement shall not be over 10 seconds. The current measurement shall be carried out 1 minute after the completion of previous measurement.

Frequency response: 40Hz-1kHz True RMS

4.2.10 Temperature

Measuring range	Resolution	Accuracy
°C	1°C	-20 °C~1000 °C	±(1.0%+3) reading
°F	1°F	-4 °F~1832 °F	±(1.0%+3) reading

Overload protection: 600V DC / AC

5. Meter maintenance

This section provides the basic information on maintenance, including the descriptions about replacement of protective tubes and batteries. Do not attempt the meter maintenance unless you are experienced in maintenance and have read the information on calibration, performance test and maintenance.

5.1 General maintenance

To avoid any electric shock or damage to the meter, do not attempt to clean the inside of the meter. You must remove the line connecting a test lead to input signals, before opening the case or battery cover.

You must regularly use damp cloth and a small quantity of detergent to clean the meter's shell.

Don't attempt the use of any aberrant or chemical solvent.

The dirty or damp input socket may affect reading.

Steps for cleaning input sockets:

• Disenable the meter and pull all test leads out of the input socket.
• Clean up all dirty substances on sockets.
• Use a new cotton ball with a detergent or lubricant to clean each socket, because lubricant can prevent the socket vulnerable to dampness from pollution.

5.2 Battery & Fuse Replacement

To avoid any electric shock or personal injury as a result of incorrect reading, replace batteries once the symbol + appear on the display unit. Only the designated fuse (600mA/1000V, 10A/1000V quick-acting fuse) can be used. To avoid any electric shock or personal injury, don't attempt to open the battery cover to replace batteries, unless you have already powered off the device and carried out an examination to ensure that the test lead has been disconnected from the circuit to be measured.

Batteries must be replaced by the following steps:

1. Cut off the power to the meter.
2. Pull all test leads out of the input socket.
3. Use a screw driver to unscrew the bolts that are used to fix battery cover.
4. Take off the battery cover.
5. Remove the old batteries or the damaged protective tubes.
6. Make replacements with new 4 × 1.5 ~V AA batteries or new protective casing.
7. Remount the battery cover and fix a bolt.

1.2 Input protection measures

Table.1 Symbols (Continued)

V, mV	V:	V: die Einheit der Spannung
	mV:	Millivolt, 1x10-3or 0.001 volt.
A, mA, μA	A:	Ampere, die Einheit des Stroms.
	mA:	Milliampere, 1x10-3or 0.001 ampere.
	μA:	Microampere, 1x10-6or 0.000001 ampere.
Ω, kΩ, MΩ	Ω:	Ohm, die Einheit des Widersands
	kΩ:	Kilohm, 1000 Ohm
	MΩ:	Megaohm, 1,000,000 ohm
MkHz	Hz:	Hz,die Einheit der Freqenz
	KHz:	KHz, 1x103Hz
	MHz:	MHz, 1x106Hz or 1000 KHz
mF,μF, nF	F:	Farad, die Einheit der Kapazitanz
	mF:	Millifarad, 1x10-3or 0.001 farad
	μF:	Microfarad, 1x10-6or 0.000001 farad
	nF:	nF, 1x10-9or 0.000000001 farad

Batteries must be replaced by the following steps:

Table.1 Symbols (Continued)

V, mV	V:	V:L'unité de volt
	mV:	Millivolt, 1x10-3or 0.001 volt
A, mA, μA	A:	Ampère, l'unité de courant.
	mA:	Milliampere, 1x10-3or 0.001 ampère
	μA:	Microampère, 1x10-6or 0.000001 ampère
Ω, kΩ, MΩ	Ω:	Ohm, l'unité de résistance électrique.
	kΩ:	Kilohm, 1000 Ohm
	MΩ:	Megaohm, 1,000,000 ohm
MkHz	Hz:	Hz, l'unité de fréquence
	KHz:	KHz, 1x103Hz
	MHz:	MHz, 1x106Hz or 1000 KHz
mF,μF, nF	F:	Farad, l'unité de capacitance.
	mF:	Millifarad, 1x10-3or 0.001 farad
	μF:	Microfarad, 1x10-6or 0.000001 farad
	nF:	nF, 1x10-9or 0.000000001 farad

Overload protection: 600V DC/AC

Open-circuit voltage: 1V

4.2.5 Diodo

3. Linee guida operative

4.2.6 Beeper continuity

This is the way of protecting the operation of the system.

5.1一般的なルンデナス

ADD: No.B714, Niulanqian Building, Minzhi Road,

Longhua District, Shenzhen, Guangdong, China 518000

Made in China

C∈FCRoHS