Pro's Kit MT-1210 Manuel utilisateur

Multimeter

MT-1210

3 1/2經濟款數位電錶

User’s Manual

1st Edition, 2020

SAFETY INFORMATION

This multimeter has been designed according to IEC 1010

concerning electronic measuring instruments with an overvoltage

category (CAT II) and pollution 2. Follow all safety and operating

instructions to ensure that the meter is used safely and is kept in

good operating condition. Full compliance with safety standards can

be guaranteed only with test leads supplied. If necessary, they must

be replaced with the type specified in this manual.

SAFETY SYMBOLS

Important safety information, refer to the operating manual.

Dangerous voltage may be present.

Earth ground.

Double insulation (Protection class II).

Fuse must be replaced with rating specified in the manual.

MAINTENANCE

• Before opening the case, always disconnect test leads from all

energized circuits.

• For continue protection against fire; replace fuse only with the

specified voltage and current ratings: F 500mA/250V(Quick

Acting)

• Never use the meter unless the back cover is in place and

fastened completely.

• Do not use abrasives or solvents on the meter. To clean it using a

damp cloth and mild detergent only.

DURING USE

• Never exceed the protection limit values indicated in specifications

for each range of measurement.

• When the meter is linked to measurement circuit, do not touch

unused terminals.

• Never use the meter to measure voltages that might exceed 500V

above earth ground in category II installations.

• When the value scale to be measured is unknown beforehand, set

the range selector at the highest position.

• Before rotating the range selector to change functions, disconnect

test leads from the circuit under test.

• When carrying out measurements on TV or switching power

circuits always remember that there may be high amplitude

voltages pulses at test points, which can damage the meter.

• Always is careful when working with voltages above 60V dc or 30V

ac rms. Keep fingers behind the probe barriers while measuring.

• Before attempting to insert transistors for testing, always be sure

that test leads have been disconnected from any measurement

circuits.

• Components should not be connected to the hFE socket when

making voltage measurements with test leads.

• Never perform resistance measurements on live circuits.

GENERAL DESCRIPTION

The meter is a handheld 3 1/2 digital multimeter for measuring DC

and AC voltage, DC current, Resistance, Diode, Transistor and

Continuity Test and 1.5V battery test.

The Back light of display is optional.

N/P ebce

Display

1. 3 1/2 digit, 7 segment, 15mm high LCD.

2. Back light

When this button is pushed, the Back light of display is on; press

the Back light button once, and the backlight is turned off.

3. Rotary switch

This switch is used to select functions and desired ranges as well

as to turn on/off the meter.

FRONT PANEL DESCRIPTION

4. Hold button

When this button is pushed, the display will keep the last reading

and " " symbol will appear on the LCD until pushing it again.

5. "10A" jack

Plug in connector for red test lead for 10A measurement. "COM"

jack

6. Plug in connector for black (negative) test lead. "VmA" jack

7. Plug in connector for red (positive) test lead for voltage,

resistance and current (except 10A) measurements.

SPECIFICATIONS

Accuracy is specified for a period of one year after calibration and at

18°C to 28°C(64°F to 82°F) with relative humidity to 80%.

GENERAL

Maximum voltage between

terminals and earth ground

Fuse protection

Power

Display

Measuring method

Overrange Indication

Polarity indication

Operating environment

Storage temperature

Low battery indication

Size

Weight

DC VOLTAGE

or rms. ac for other ranges.

DC CURRENT

range unfused)

AC VOLTAGE

Overload Protection: 500V dc or rms. ac for all ranges.

Frequency range: 40Hz to 400Hz. Response: Average respond-

ing, calibrated in rms. of a sine wave.

DIODE & CONTINUITY

Range Resolution Accuracy

200mV 100µV ±1% of rdg ± 2 digits

2V 1mV ±1% of rdg ± 2 digits

20V 10mV ±1% of rdg ± 2 digits

200V 100mV ±1% of rdg ± 2 digits

500V 1V ±1.2% of rdg ± 5 digits

Range Resolution Accuracy

200µA 100mA ±2% of rdg ± 5 digits

2mA 1µA ±2% of rdg ± 5 digits

20mA 10µA ±2% of rdg ± 5 digits

200mA 100µA ±2% of rdg ± 5 digits

10A ±3% of rdg ± 5 digits

Range Resolution Accuracy

200V 100mV ±2.5% of rdg ± 10 digits

500V 1V ±2.5% of rdg ± 10 digits

Range Description

Show the approx. forward voltage drop of the diode.

Overload Protection: 250V dc or rms. ac.

RESISTANCE

Maximum Open Circuit Voltage: 2.8V

Overload Protection: 250V dc or rms. ac for all ranges.

TRANSISTOR hFE TEST (0-1000)

BATTERY TESTING

Range Resolution Accuracy

±1% of rdg ± 5 digits

±1.5% of rdg ± 5 digits

200

20k

200k

0.1

100

Range Test Range Test Current Test Voltage

NPN & PNP 0-1000 Ib=10µA Vce=2.8V

±2.5% of rdg +2 digits

Range Accuracy

1.5V

OPERATING INSTRUCTIONS DC VOLTAGE

MEASUREMENT

1. Connect the red test lead to the "V.Ω.mA" jack and the black lead

to the "COM" jack.

2. Set rotary switch at desired DCV position. If the voltage to be

measured is not known beforehand, set range switch at the

highest range position and then reduce it until satisfactory

resolution is obtained.

3. Connect test leads across the source or load being measured.

4. Read voltage value on the LCD display along with the polarity of

the red lead connection.

Set the rotary switch at desired ”V~”range position.

TRANSISTOR TEST

1. Set the rotary switch at "hFE" position.

2. Determine whether the transistor under testing is NPN or PNP

and locate the emitter base and collector leads. Insert the leads

into proper holes of the hFE socket on the front panel.

3. Read the approximate hFE value at the test condition of base

current 10µA and Vce 2.8V.

NOTE:

To avoid electrical shock, remove test leads from measurement

circuits before testing a transistor.

AUDIBLE CONTINUITY TEST

1. Connect red test lead to "V.Ω.mA", black test lead to “COM”.

2. Set range switch to " " position.

3. Connect test leads to two points of circuit to be tested. If

continuity exists, built-in buzzer will sound.

BATTERY TEST

1. Connect the red test lead to "V.Ω.mA" jack and black test lead to

the "COM" jack

2. Set the rotary switch at desived "1.5V mA " position

3. Connect the red test lead to the battery ”+” and the black test

lead to the battery “-”.

4. Read mA value on the LCD display. If the value is less than

40mA, it means the battery is low.

WARNING

To avoid electric shock, be sure the thermocouple has been

removed before changing to another function measurement.

BATTERY & FUSE REPLACEMENT

If " " appears on display, it indicates that the battery should

be replaced.

Fuse rarely need replacement and blow almost always as a

result of operator’s error.

To replace battery & fuse (500mA/250V) remove the 2 screws

in the bottom of the case. Simply remove the old, and replace

with a new one.

Be careful to observe battery polarity.

WARNING

Before attempting to open the case, always be sure that test

leads have been disconnected from measurement circuits.

Close case and tighten screws completely before using the

meter to avoid electrical shock hazard.

ACCESSORIES

• Operator’s instruction manual

• Set of test leads

• Holster

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