Pro's Kit MT-1708 Bedienungsanleitung

MT-1708

3-5/6 Smart Digital Multimeter

User’s Manual

1st Edition, 2019

1.General Information

This digital multi-meter is designed and manufactured in compliance with

IEC-61010 safety requirements on electronic measuring instruments and

hand-held digital multi-meters. It is compliant with IEC-61010 requirements

pertaining to 600V CAT.Ⅲand requirements on pollution degree 2. Please

read carefully this Operation 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 reading on the meter will grow

unstable and even produce 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 measurement 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 taken off the measured circuit.

*For all DC functions, to prevent potential electric shock as a result of

incorrect reading, please first useAC 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 use 3x 1.5V AAA 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 does not exceed 600V respectively.

*Themeter shall notbein service if its case(orpart of itscase)isdismantled.

1.1.3 Safety symbol:

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

Manual:

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

Double insulation protection

Fuse

Compliant with European Union Directive

High voltage warning

Battery Under Voltage indicator/ Low Battery

CAT.III 600V

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 DC 600V or 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 (F630mA/250V) is used for protection purpose when

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 reading. 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.NCV inductive probe ②. LCD display screen ③.Functional key

④.K-type thermocouple temperature probe socket ⑤Input socket.

⑥.LED indicator ⑦hFE Transistor testing socket ⑧Toggle switch

2.2 Accessories

Operation Manual

X 1

Test lead

X 1 pair

K-Type thermocouple

X 1

Fuse

X 2

3 Operational Guidelines

This instrument is a kind of intelligent digital multi-meter, so the operation is

very simple, and it is not required to carry out function selection during

measurement; the instrument will recognize measured signals automatically,

then measure and display measurement results.

③

①

②

④

⑤

⑥

⑦

⑧

Not:

The instrument could not carry out measurement on two or more

functions.

Instrument's automatic detection sequence on measurement

instrument:

AC voltage → DC voltage → AC current → DC current →

Temperature measurement → Transistor measurement → Capacitor

measurement → Resistance & On-off

3.1 Startup/ Shutdown

Startup: When the instrument is shut down, press the key and hold,

till the buzzer sends a "Di" sound, then release.

Shutdown: When the instrument is started, press the key and hold, till

the buzzer sends a "Di" sound, then release.

3.2 Automatic shutdown function

If no pressing operation within 10 minutes, while no signal is input, the

instrument will shut down automatically.

3.3 Backlight and lighting function

Press the key for more than 2 seconds to turn on the backlight and the

light; then press this key for more than 2 seconds to turn off the backlight

and the light, or turn off automatically within about 10 seconds after startup.

3.4 Data hold function

Press the key to start data hold, the character will show on the

display; then press the key to close data hold.

3.5 AC&DC voltage/Frequency/Resistance measurement /

Continuity test

Press the key to start the power of the instrument.

Insert the red test lead into the V socket, and the black test lead into the

COM socket.

Parallel connect the test lead to the circuit, power supply or resistance

to be measured. The instrument will judge AC voltage, DC voltage and

resistance automatically.

During measuring the resistance, when the resistance is less than about

30Ω,the built-in buzzer will sound, while the green LED indicator will

light up; when the resistance is more than about 30Ω and less than

about 50Ω,the red LED indicator will light up, and the buzzer will not

sound.

Read measurement results from the display screen. When measuring

DC voltage, the voltage polarity of the testing points of the red test lead

will show synchronously on the display.

When measuring AC voltage, press the key to display frequency,

and then press the key to shift back to ac voltage display.

When the measurement is completed, press the power key , to shut

down the instrument power supply.

Warning: In order to avoid safety accidents such as

potential electric shock or personal injury etc., please

comply with safety work norms:

3.6 AC/DC Current/ Frequency / Capacitor measurement

Press the key to start the power of the instrument.

Insert the red test lead into the mAsocket, and the black test lead into

the COM socket.

During measuring the capacitor, parallel connect the test lead to both

ends of the capacitor to be measured; during measuring the current,

connect the test lead in series to the circuit to be measured. The

instrument will recognize and measure automatically.

Read measurement results from the display screen. When measuring

DC voltage, the current polarity of the testing ends of the red test lead

will show synchronously on the display.

When measuring AC current, press the key to display frequency,

and then press the key to shift back to AC current display.

When the measurement is completed, press the power key to shut

down the instrument power supply.

Max. current measurement of the instrument is 600mA, and

the min. current measurement is 5mA.

During measuring the maximum capacitor, it requires about

10 seconds to display the measurement result.

Warning: In order to avoid safety accidents such as

potential electric shock or personal injury etc., please

comply with safety work norms:

3.7 Temperature Measurement

Press the key to start the power of the instrument.

Take off the test lead and push down the Toggle switch on the

instrument panel lightly, till the Toggle switch is locked.

Insert the temperature probe of the K-type thermocouple into the socket

of the temperature probe of the temperature probe of the K-type

thermocouple.

Read measurement results from the display screen.

Press the key to shift between degrees Celsius and Fahrenheit.

When the measurement is completed, press the power key to shut

down the instrument power supply.

Warning: In order to avoid safety accidents such as

potential electric shock or personal injury etc., please

comply with safety work norms:

3.8 Transistor Measurement

Press the key ,to start the power of the instrument.

Take off the test lead and push down the Toggle switch on the

instrument panel lightly, till the Toggle switch is locked.

Insert the transistor into the transistor testing socket.

Read measurement results from the display screen.

When the measurement is completed, press the power key to

shut down the instrument power supply.

Warning: In order to avoid safety accidents such as

potential electric shock or personal injury etc., please

comply with safety work norms:

3.9 NCV Detection

Press the key ,to start the power of the instrument.

Press the key and hold, the instrument will display "NCV".

Then bring the instrument's NCV inductive probe close to the point

being detected gradually.

When the AC voltage sensed by the instrument is larger than about 12V,

2 green LED indicators will light up, meanwhile, the buzzer will send a

slow "Di, Di" sound.

When the AC voltage sensed by the instrument is larger than about 60V,

4 green LED indicators will light up, meanwhile, the buzzer will send a

"Di, Di" sound at moderate speed.

It is not allowed to carry out measurement on electrified objects,

or input measurement voltage of the socket from this.

Pay attention to the polarity of the thermocouple, and do not

reverse.

It is not allowed to carry out measurement voltage of the

socket from this.

Pay attention to the transistor type and pole B,C and E shall be

inserted into corresponding socket, do not make a mistake.

When the AC voltage sensed by the instrument is larger than about 90V,

4 green LED indicators and 2 red LED indicators will light up, meanwhile,

the buzzer will send a "Di, Di" sound quickly.

When the measurement is completed, press the power key to

shut down the instrument power supply.

Warning: In order to avoid safety accidents such as

potential electric shock or personal injury etc., please

comply with safety work norms:

3.10 Live Wire Detection

Press the key ,to start the power of the instrument.

Insert the red test lead into the V socket.

Press the key and hold, the instrument will display "NCV".

Then contact the other end of the red test lead with the point being

detected.

When the AC voltage sensed by the instrument is larger than about

110V, 4 green LED indicators and 2 red LED indicators will light up, the

display will show "LIVE", meanwhile, the buzzer will send a "Di, Di…"

sound quickly.

When the measurement is completed, release the key; then press

the power key , to shut down the instrument power supply.

Warning: In order to avoid safety accidents such as

potential electric shock or personal injury etc., please

comply with safety work norms:

4 General Technical Specifications

4.1 Overall specifications

Use environmental conditions:

EN61010-1, EN61010-2-033, EN61326-1, CATIII 600V,pollution level 2.

Altitude<2000 m

Working temperature and humidity:0~40℃(<80% RH, <10℃is not

considered)

Storage temperature and humidity:-10~60 (<70% RH, with the battery

taken off)

Temperature coefficient: 0.1x Accuracy/

Allowable max. voltage between measurement end and the ground:

DC600V or AC Valid value.

Outrange indication: Display "OL".

Battery low voltage indication: When the battery voltage is lower than

normal working voltage, " " will show on the display screen.

Input polarity indication: It will display "-" automatically.

Power supply: 3x1.5V AAA battery.

Dimension:169mm x 83mm x 53mm

4.2 Accuracy specification

The accuracy shall be applicable within one year after calibration.

Reference conditions: Ambient temperature 18 to 28 ,and relative

humidity no more than 80%.

4.2.1 DC voltage

Measuring range

Resolution

Accuracy

0.001V

±(0.8% Reading +3 digits)

60V

0.01V

600V

0.1V

Input impedance:10M

Min. measurement voltage: 0.2V DC

Max. measurement voltage: 600V DC or AC valid value.

4.2.2 AC voltage

Measuring range

Resolution

Accuracy

0.001V

±（1.2% readings +3 digits）

60V

0.01V

600V

0.1V

Input impedance:10M

Min. measurement voltage: 0.5V AC voltage.

Max. measurement voltage: 600V DC orAC valid value.

Frequency response: 45Hz-65Hz True valid value response.

4.2.3 DC current

Measuring range

Resolution

Accuracy

600mA

0.1mA

±(1% Reading + 3 digits)

Min. measurement current: 5mA

Max. measurement current: 600mA DC or AC valid value.

Input protection: F630mA/250V fuse.

4.2.4 AC current

Measuring range

Resolution

Accuracy

600mA

0.1mA

±(1.5% Reading + 3 digits)

Min. measurement current: 5mA

Max. measurement current: 600mA DC or AC valid value.

Input protection: F630mA/250V fuse.

Frequency range:45Hz~65Hz, true valid value response.

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