Pro's Kit MT-1820 Manuale utente

VΩHz

CAT ll

10A

uAmA COM

MAX 10A

10sec

FUSED

MAX 400mA

FUSED

MAX

1000V DC

750V AC

REL/RS232

Hz/DUTY HOLD

SELECTRANGE

MAX/MIN

hEF

Hz ˚C

˚C

OFF

MT-1820

AUTO POWER OFF

hEF

Professional Digital

Multimeter

MT-1820

User’s Manual

Index

General 2

Open Package Inspection 2

Safety Note 2

Safety Symbol Description 4

Front Panel Description 5

Property 6

DC Voltage (DCV) 6

AC Voltage (ACV) 7

DC Current (DCA) 8

AC Current (ACA) 9

Resistance 11

Diode and Continuity Test 12

Capacitance (C) 12

Frequency (Hz) 13

Transistor Test 14

Temperature Test 15

Other Function & Instrument Maintenance 16

General

The instrument is a high performance, high accuracy, 3 5/6 digit multi-meter,

it uses the LCD with 33mm high gure to make the reading clear, the display

simple and the operation convenient.

The instrument can measure DC and AC voltage, DC and AC current, Resis-

tance, Capacitance, Frequency, Duty Circle, Transistor, Diode and Continuity

test; And it also has the features of Bar Graph, Unit Indication, Data Hold,

Relative Value Measurement (REL), USB Interface, AUTO/MANUAL range

selection, Auto Power Off and Alarm Buzzer. The instrument adopts the

directly driven 4 digits microprocessor and dual-integral A/D converter, which

provide the high solution and high accuracy digital displaying driver. Because

of its outstanding features, it is an excellent tool and most suitable for lab,

factory, maintenance and repair users.

Open-package Inspection

Open the gift box and take out the instrument, carefully check the follow-

ing accessories. If any accessory was lost or damaged, please contact the

manufactory at once.

• Digital Multimeter 1pc

• Operation Manual 1pc

• Test Lead 1set

• Temperature Cable 1pc

• USB Cable 1pc

• Software disc 1pc

• Transistor test accessory 1pc

Safety Note

The instrument meets the standard of IEC1010 (safety standard promulgated

by the International Electrician Committee). Design and manufacture com-

plied with the standard of Pollution Degree 2.

Warning

To avoid endangering the safety of the users, should read the operation

manual carefully before operation, and strictly abide by the safety warning

information and operation description to use the instrument.

1. Caution to avoid the electric shock when measuring the voltage higher

than 30V, the current higher than 10mA, AC Power Lines with Inductive

Load and the AC Power Lines during the period of Electric Power Fluctua-

tion.

2. Before measuring, should check if the function knob is set in the correct

range, make sure the test lead connects reliably, links up correctly, and

insulates properly to avoid the electric shock

3. It meets the requirements of the safety standard only to use the instrument

with the equipped test lead. If the test lead is broken, should replace it by

the same type and same electric specication test lead.

4. Do not replace the inside fuse by the unconrmed one. Only replace it by

the same type and specication fuse. Before replacement, should keep

the test lead off the tested point to make sure there is no any signal at the

input terminal.

5. Do not replace the inside battery by the unconrmed one. Only replace it

by the same type and electric specication battery. Before replacement,

should keep the test lead off the tested point to make sure there is no any

signal at the input terminal.

6. When measuring electricity, do not connect the body with the ground

directly, and do not touch the possible exposed metal terminal, output

socket or lead clamp with ground potential. Usually use the dry cloth, rub-

ber overshoes, rubber cushion and other insulated materials to keep the

body isolated with the ground.

7. Do not store and use the instrument in high humility, high temperature,

combustible, explosive and strong magnetic places.

8. It is possible to damage the instrument and endanger the safety of the

users when measuring the voltage over the range limit. The allowed

maximum voltage is printed on the front panel of the instrument, do not

input the range limit specied to avoid the electric shock and instrument

damage

9. Do not measure any voltage when connecting the test lead with the

current terminal to avoid damaging the instrument and endangering the

safety of the users.

10. Do not try to calibrate or repair the instrument, should operate it by the

specially trained or qualied professional people.

11. The function/range selection knob should be set in the correct range

when measuring. When switching the function/range selection knob,

keep the test lead off the tested object to make sure there is no any

signal at the input terminal. Do not switch the function/range selection

knob when measuring.

12. When LCD displays “ ”, please replace the battery in time to make

sure the measuring accuracy.

13. Do not allow to measure the voltage when connecting the test lead with

the current terminal!

14. Do not try to modify the inner circuit at will to avoid damaging the instru-

ment and endangering the safety of the users.

Safety Symbol Description

Warning DCA

High Voltage! Dangerous! ACA

GND DCA & ACA

Dual Insulation Meets the direction of

European IEC

Low Battery Fuse

Front Panel Description

1. Instrument Model Number

2. LCD Display

3. HOLD: Date Hold button, press the button, the value is

held on LCD; Press the button again, exit the hold mode

and get into the normal measuring status.

4. HZ/DUTY: Frequency/Duty Circle selection button,

press the button to switch between the Frequency and

Duty Circle mode at Frequency Range; Press the button

to switch to Voltage or Current/Frequency/Duty Circle

model at AC Voltage or AC Current Range.

SELECT: button switch, press the button to switch the

measuring function.

5. MAX/MIN: Maximum, Minimum, press the button, the instrument gets into the MAX

mode, the measuring maximum value will be held at this mode; Press the button

again to get into the MIM mode, the measuring minimum value will be held at this

mode. At the MAX/MIN mode, the maximum or minimum value will be held on

LCD. Under this circumstance, there are no Bar Graph and Auto Power Off function,

hold pressing MAX/MIN button for 2 seconds, exit the MAX/MIN mode.

6. RANGE: Auto Range/ Manual Range switch, the default is set as Auto Range mode

when turning on, press the button and switch to Manual Range. At the Manual Range

mode, press the button once, the range is switched to the higher one, press the but-

ton again to switch the range to the lowest one when measuring the highest range,

the cycle is in proper order from low to high. Keep pressing the button for 2 sec.,

return to Auto Range mode. There is no Auto Range mode at Frequency and Capaci-

tance range.

7. REL: Relative Value Measurement, press the button to the mode of Relative Value

Measurement, press again to cancel the Relative Value Measurement, circulated

like this. Keep pressing the button more than 2 seconds to switch to RS232, RS232

symbol appears on LCD, it indicates the instrument is getting into the status of data

transmission. Keeping pressing the button more than 2 seconds, RS232 symbol

disappears, the data transmission is stopped.

8. Function/range selection knob: select the measuring function and range

9. 10A current input terminal: Measuring AC/DC 10A positive input terminal, insert red

test lead.

10. uA/mA /˚C input terminal: Measuring AC/DC uA/mA and Temperature positive input

terminal.

11. COM input terminal: negative input terminal, insert the black test lead.

VΩHz

CAT ll

10A

uAmA COM

MAX 10A

10sec

FUSED

MAX 400mA

FUSED

MAX

1000V DC

750V AC

REL/RS232

Hz/DUTY HOLD

SELECTRANGE

MAX/MIN

Hz ˚C

˚C

OFF

MT-1820

AUTO POWER OFF

hEF

3.1

3.2

3.3

3.6

3.4

3.5

12. VΩHz input terminal: measure Voltage, Frequency/Duty Circle, Resistance, Capaci-

tance, Diode and Continuity positive input terminal, insert the red test lead.

Property

General Feature

1-1 Display: LCD

1-2 Max Display: 5999 (3 5/6) counts automatic polarity display and unit

display.

1-3 Measuring method: dual-integral A/D converter

1-4 Sampling rage: 3 times/second

1-5 Over range indication: display “OL”

1-6 Low battery indication: “ ” appearance

1-7 Operation environment: 0~40˚C relative humidity <80%

1-8 Storage environment: -10~50˚C relative humidity <80%

1-9 Power: 2pcs 1.5V batteries (AAA battery)

1-10 Dimension: 192mm x 95mm x 48mm

1-11 Weight: Approx. 390g (including batteries)

Technic Property

1. Accuracy: (a% × reading + digits) at 23 ± 5˚C , relative humidity <75%.

2. One year calibration guarantee since the time dispatched from the factory.

DC Voltage (DCV)

1. Turn the function/range selection knob to DCV/ACV. Insert the red and

black test lead separately to VΩHz and COM input terminal, press “SE-

LECT” button to switch to DCV measurement mode.

2. The instrument was preset as the Auto Range mode of DCV measure-

ment, displays “AUTO” symbol on LCD, press “RANGE” button to switch

to the Manual Range mode.

3. Connect the test lead to the tested circuit in parallel, the polarity of the red

test lead and the tested voltage value will be displayed on LCD simultane-

ously.

Note:

a) Do not measure the voltage higher than DC 1000V or AC 750V.

b) When measuring the high voltage, caution to avoid electric shock. Cut the

connection between the test lead and tested circuit at once after measure-

ment.

C) At the Manual Range mode, if “OL” is displayed on LCD, it indicates the

tested voltage value has exceeded the present range limit, please select

the higher range to complete the measurement.

Range Accuracy Resolution

600mV

±(0.5%+4d)

0.1mV

6V 1mV

60V 10mV

600V 100mV

1000V ±(1.0%+6d) 1V

Input impedance: >60MΩ at Range 600mV , 10MΩ at other range.

Overload protection: 1000V DC or 750V AC peak value.

AC Voltage (ACV)

1. Turn the function/range selection knob to ACV/DCV, press

“SELECT” button to switch to ACV measurement mode. Insert the red and

black test lead separately to VΩHz and VCOM input terminal, displayed

as the following picture.

2. The instrument was preset as the Auto Range mode, displays “AUTO”

symbol on LCD, press “RANGE” button to switch to the Manual Range

mode. Press “Hz/DUTY” button to measure

Frequency/Duty Circle at the Auto Range or

Manual ACA model. But the frequency

response is very low, at this time, it suits

to measure the circuit of high voltage and low

VΩHz

CAT ll

10A

uAmA COM

MAX 10A

10sec

FUSED

MAX 400mA

FUSED

MAX

1000V DC

750V AC

REL/RS232

Hz/DUTY HOLD

SELECT RANGE

MAX/MIN

hEF

Hz ˚C

˚C

OFF

MT-1820

AUTO POWER OFF

hEF

SELECT

VΩHz

CAT ll

10A

uAmA COM

MAX 10A

10sec

FUSED

MAX 400mA

FUSED

MAX

1000V DC

750V AC

REL/RS232

Hz/DUTY HOLD

SELECT RANGE

MAX/MIN

hEF

Hz ˚C

˚C

OFF

MT-1820

AUTO POWER OFF

hEF

SELECT

frequency under the circumstance of magnetic

disturbance, such as 220V/50Hz-400Hz,380V/50Hz~400Hz

3. Connect the test lead to the tested circuit

in parallel, the polarity of the red test lead and the tested voltage value will

be displayed on LCD simultaneously

Note:

a) Do not measure the voltage higher than DC 1000V or AC 750V.

b) When measuring the high voltage, caution to avoid electric shock. Cut the

connection between the test lead and tested circuit at once after measure-

ment.

Range Accuracy Resolution

±(0.8%+10d)

1mV

60V 10mV

600V 100mV

750V ±(1.0%+10d) 1V

Input impedance: 10MΩ. Overload protection: 1000V DC or 750V AC peak

value. Frequency response: 40-400Hz. Indication: average value response

(RMS of sine wave). Duty Circle indication (0.1%-99.9%)

DC Current (DCA)

1. Insert the black test lead to “COM” input terminal and the red test lead to

“uAmA ”or “10A”, displayed as the right picture.

2. Turn the function/range selection knob to current range, press “SELECT”,

switch to DC measurement mode, then connect the test lead with the

tested circuit in series, the polarity of the red test lead and the tested cur-

rent value will be displayed on LCD simultaneously.

3. If “OL” is displayed on LCD, it indicates the test current value has exceed-

ed the present range limit, please select the higher range to complete the

measurement.

Note:

a) Do not measure the current higher than 10A at Range 10A and higher

than 6000uA at uA Range and higher than 600mA

at mA Range, otherwise the fuse will be

burnt out or the instrument will be damaged.

b) Do not connect the test lead to any circuit

in parallel when the test lead is inserted in

the current input terminal, otherwise it is

possible to damage the instrument or

endanger the safety of the users. Cut

the connection between the test lead

and tested circuit at once after measurement.

Range Accuracy Resolution

600uA

±(1.0%+10)

0.1μA

6000uA 1μA

60mA 10μA

600mA 100μA

6A ±(1.2%+10) 1mA

10A 10mA

Max input current: 10A (less than 15 seconds).

Overload protection: 0.5A/250V fuse, 10A/250V fuse.

AC Current (ACA)

1. Insert the black test lead to “COM” input terminal and the red test lead to

“uAmA ”or “10A”input terminal,displayed as the right picture.

2. Turn the function/range selection knob to current range, press “SELECT”,

switch to AC measurement mode, then connect the test lead to the tested

circuit in series, the polarity of the red test lead and the tested current

value will be displayed on LCD simultaneously.

VΩHz

CAT ll

10A

uAmA COM

MAX 10A

10sec

FUSED

MAX 400mA

FUSED

MAX

1000V DC

750V AC

REL/RS232

Hz/DUTY HOLD

SELECT RANGE

MAX/MIN

hEF

Hz ˚C

˚C

OFF

MT-1820

AUTO POWER OFF

hEF

µA

VΩHz

CAT ll

10A

uAmA COM

MAX 10A

10sec

FUSED

MAX 400mA

FUSED

MAX

1000V DC

750V AC

REL/RS232

Hz/DUTY HOLD

SELECT RANGE

MAX/MIN

hEF

Hz ˚C

˚C

OFF

MT-1820

AUTO POWER OFF

hEF

SELECT

10A

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