Mastech MS8211D Manual de usuario

MS8211D

DIGITAL MULTIMETER

INSTRUCTION MANUAL

1.1 Preliminary.................................................2

CONTENTS CONTENTS

1. Safety inform.....................................1 4.4 Range Transform................................11

1.2 During use................................................2

1.3 Symbols..................................................3

1.4 Maintenance...........................................4

2. Description.......................................5

2.1 Names OF Components..........................5

2.2 Components Elucidation .........................6

3. Specifications..................................6

3.1 General Specifications...........................7

3.2 Electrical Specifications..........................7

4. Operating Instruction.....................10

4.1 Data Hold.............................................10

4.2 Maximum Value Measuring

And Hold.............................................11

4.3 Function Transform...............................11

4.5 Auto Power Off....................................11

4.6 Preparation For Measurement.............11

4.7 Measuring DC Voltage.........................12

4.8 Measuring AC Voltage........................13

4.9 Measuring Resistance.........................15

4.10 Diode Testing...................................16

4.11 Continuity Testing.............................17

4.12 ......................18Measuring DC Current

5. Maintenance................................21

5.1 ...........................21Battery Replacement

5.2 Test leads Replacement.....................21

6. Accessories.................................22

4.13 ........................19Measuring AC Current

4.14 .........................................20Logic Test

01 0 2

1. SAFETY INFORMATION

This meter has been designed according to IEC-1010

concerning electronic measuring instruments with an

overvoltage category CAT II 600V and pollution 2.

Follow all safety and operating instructions to ensure

that the meter is used safely and is kept in good

operating condition.

With proper use and care, the digital meter will give

you years of satisfactory service.

1.1.1 When using the meter, the user must observe

all normal safety rules concerning:

- Protection against the dangers of electrical current.

- Protection of the meter against misuse.

BE EXTREMELY CAREFUL IN THE USE OF THIS

METER. Improper use of this device can result

in electric shock or destroy of the meter. Follow

all safeguards suggested in this manual and the

normal safety precautions used in working with

electrical circuits.

Do not service this device if you are not qualified

to do so.

To ensure safe operation, and in order to exploit

to the full the functionality of the meter, please

follow the directions in this section carefully.

WARNING

1.1 Preliminary

1.1.2

or shipping conditions caused, inspect and

If the equipment is used in a manner not specified

by the manufacturer, the protection provided by the

equipment/probe assembly may be impaired.

1.1.3 When the meter is delivered, check that it has

not been damaged in transit.

1.1.4 When poor condition under harsh preservation

confirm this meter without delay.

1.1.5 Test lead or test clip must be in good condition.

Before using verify that the insulation on test lead

or test clip is not damaged and/or the leads wire is

not exposed.

1.1.6 Full compliance with safety standards can be

guaranteed only if used with test leads supplied.

If necessary, they must be replaced with the same

model or same electric ratings.

Measurement category II is for measurements

performed in the building installation. (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.)

1.2 During Use

1.2.1 Before using, you must select the right function

and range.

1.2.2 Never exceed the protection limit values indicated

in specifications for each range of measurement.

1.2.3 When the meter is linked to a measurement circuit,

do not touch the probe tip of the meter and test lead

(or test clip).

1.2.4 At the manual range, when the value scale to be

measured is unknown beforehand, select the

highest range.

03 0 4

M.H The maximum value is being held.

D-H This indicates that the display data is being held.

AUTO Auto range

The battery is not sufficient for proper operation.

1.4 Maintenance

1.4.1 Please do not attempt to adjust or repair the meter

by removing the rear case while voltage is being

applied. A technician who fully understands danger

involved should only carry out such actions.

1.4.2 Before opening the battery cover or case of the

meter, always disconnect the tip of meter and the

probe of the test lead (or test clip) from all tested

circuits.

1.4.3 To avoid the wrong reading causing electricity

attack, when the meter displays“ ” , you must

change the battery.

1.4.4 Do not use abrasives or solvents on the meter, use

a damp cloth and mild detergent only.

1.4.5 Always set the transform switch to the OFF position

when the meter is not in use.

1.4.6 If the meter is to be stored for a long period of time,

the batteries should be removed to prevent damage

to the unit.

1.2.5 Do not measure voltage if the voltage on the

terminals exceeds 600V above earth ground.

1.2.6 Always be careful when working voltages above

60V DC or 30V AC rms, keep fingers behind the

probe barrier while measuring.

1.2.7 Never connect the meter leads across a voltage

source while the transform switch is in the

resistance, diode or continuity mode. Doing so can

damage the meter.

1.2.8 Never perform resistance, diode and continuity

measurements on live circuits.

1.2.9 Before rotating the transform switch to change the

function, disconnect the tip of meter and the probe

of the test lead (or test clip) from the circuit under

test.

1.2.10 Never use the meter under the condition of the

explosive air, steam or dirt.

1.2.11 If any faults or abnormalities are observed, the

meter can not be used any more and it has to be

checked out.

1.2.12 Never use the meter unless the rear case is in

place and fastened fully.

1.2.13 Please do not store or use meter in areas exposed

to direct sunlight, high temperature, humidity or

condensation.

CAT II Overvoltage (Installation) category II,

Pollution Degree 2 per IEC1010-1 refers to the level

of Impulse Withstand Voltage protection provided.

1.3 Symbols

Important safety information, refer to the operating

manual.

Double insulation (Protection class II).

Conforms to european union directive

Earth ground

AC Alternating current

DC Direct current

AC or DC (alternating current or direct current)

Diode

Continuity buzzer

Logic

Button Function Operation performed

FUNC.

voltage.

testing.

measurement, Diode Test and

Continuity check.

current.

Switches between dc and ac

Keep pressing during the Logic

Switches between Resistance

Switches between dc and ac

Ωand mA

Operation performed

Button Function

MAX.H

DATA-H

RANGE

This Button is used to hold data.

Disables automatic power-off feature.

manual range.

Used to transform Auto range or

Used to measure and hold the

maximum value.

position

Any switch

05 0 6

2.2 Components Elucidation

- This meter has function of auto range and manual range.

- This meter has function of auto power off.

- This meter is with the functions of data hold and

maximum value measure and hold.

- When using, it can show ranges engineering unit

enunciators measuring results.

2.1 Names Of Components

(1) Probe

(2) Rotatable Probe Socket

(3) LED Indicator

(4) Protection Ring

(5) Transform Switch

(6) DATA-H Button

(7) RANGE Button

(8) MAX.H Button

(9) FUNC. Button

- This meter is a portable professional measuring

instrument with handsome LCD easily reading.

- Single operation of a transform switch makes

measurement convenient. Overload protection and low

battery indication are provided, this meter is ideal for

use in the fields, workshop, school, hobby and home

applications.

2. DESCRIPTION

(10) Panel

(11) LCD Display

(12) COM Jack

-indicated for information about the Button operation.

- Transform Switch

This switch is used to select functions and desired

ranges.

- Probe

Input terminals for V mΑ Ω/ / and

Common terminal for measurement.

- COM Jack

Common terminal for measurement.

- LCD Display

The measuring result will be displayed.

logic test.

Any switch position

Power-up Option

- LED Indicator

At Logic test range, High level and Low level can be indicated.

3.2 Electrical Specifications

0.1mV

0.001V

200mV

0.01V

0.1V

600V

Range Resolution Accuracy

20V

200V

± (0.7% of rdg + 2 digits)

- Input Impedance: 10MΩ

- Overload Protection: 200mV range: 250V DC or

AC rms, 2V-600V ranges: DC 600V or AC 600V rms.

- Max. Input Voltage: 600V DC

- Rotatable Probe Socket

Rotating the probe in or out of the meter.

- Protection Ring

To keep the hand from the probe behind the ring.

3. SPECIFICATIONS

Accuracy is specified for a period of year after calibration

and at 18°C to 28°C(64°F to 82°F) with relative humidity

to 75%.

3.1.1 Environment conditions:

600V CAT. II

Pollution degree: 2

Altitude < 2000m

Operating temperature: 0~40 , 32°F~122 80%RH,

<10 non-condensing)

Storage temperature: -10~50 14 ~122 70% RH,

battery removed)

°C °F<

°C

°C, °F °F(<

3.1.2 Max. Voltage Between Terminals And Earth Ground:

600V DC or AC

3.1.4 Display: 20mm LCD

3.1.5 Max. Show Value: 1999 (3 1/2)

3.1.6 Polarity Indication: ‘-’indicates negative polarity.

3.1.7 Overrange Indication: Display ‘OL’

3.1.8 Sampling Time: approx. 0.4 second

3.1.9 Unit showing: showing of function and electrical capacity.

3.1.10 Low Battery Indication: ‘ ’displayed

3.1.12 Auto power off time: 15 min.

3.1.13 Power Supply: 1.5V×2 AAA battery.

3.1.14 Dimension: 208×38×29 mm

3.1.15 Weight: approx. 110g (including battery)

3.1.3 Auto ranges and manual range.

3.1.11 Fuse Protection: mA: resettable fuse

Circumstance Temperature: 23±5°C Relative

Humidity: < 75%

3.2.1 DC Voltage

3.2.2 AC Voltage

0.1mV

0.001V

200mV

0.01V

0.1V

600V

Range Resolution Accuracy

20V

200V

1V ± (1.0% of rdg + 3 digits)

± (0.8% of rdg + 3 digits)

- Input Impedance: 10MΩ

- Overload Protection: 200mV range: 250V DC

or AC rms, 2V-600V ranges: DC 600V or AC 600V rms.

- Frequency Range: 40 to 400Hz

- Response: Average, calibrated in rms of sine wave.

- Max. Input Voltage: 600V rms AC

3.1 General specifications

09 1 0

Function

3.2.4 Continuity

Built-in buzzer will sound, if resistance

is lower than 50Ω.

Range

- Open circuit voltage: approx. 0.5V

- Overload Protection: 250V DC or rms AC

3.2.5 Diode

Function

Display :read approximate

forward voltage of diode

Range Resolution

0.001V

- Forward DC Current: approx. 1mA

- Reversed DC Voltage: approx.1.5V

- Overload Protection: 250V DC or rms AC

-Input Impedance: approx. 1MΩ- Overload

Protection: 250V DC or rms AC

3.2.3 Resistance

0.1Ω

0.001KΩ

200Ω

0.01KΩ

0.1KΩ

2MΩ

Range Resolution Accuracy

2KΩ

20KΩ

200KΩ

0.001MΩ ± (1.0% of rdg + 5 digits)

20MΩ0.01MΩ

± (1.0% of rdg + 1 digits)

± (1.0% of rdg + 3 digits)

- Open Circuit Voltage: 0.25V

- Overload Protection: 250V DC or rms AC

3.2.6 DC Current

AccuracyRange Resolution

20mA

200mA 0.1mA

0.01mA ± (1.5% of rdg +3 digits)

3.2.7 AC Current

AccuracyRange Resolution

20mA

200mA 0.1mA

0.01mA ± (2.0% of rdg +3 digits)

- Overload Protection: Resettable fuse.

- Frequency Range: 40Hz-200Hz

- Response: Average, calibrated in rms of sine wave.

3.2.8 Logic Test

0V 1.5V 3.5V 5V

Low "0"High "1"

Green

LED on

Green, Red

LED off

Red LED

Description

Range

Logic

4. OPERATING INSTRUCTION

4.1 Data Hold

If you need data hold when measuring, you can put on

“DATA-H” button, it will hold the reading; if you put the

button again, data hold is not continue.

- Overload Protection: Resettable fuse.

11 1 2

4.2 Maximum Value Measuring And Hold

At the range of voltage, you can put on “MAX.H”

button, it will hold the maximum value; if you put the

button again, the maximum value will not be held.

4.3 Function Transform

Put down the "FUNC.” button when measuring the voltage.

Meter will be transformed between DC and AC range.

Put “FUNC.” button when measuring the resistance,

diode and continuity, meter will transform among them.

4.4 Range Transform

The auto range is used when measuring the voltage and

resistance. Put down the "RANGE" button if the manual

range is needed. Each time you put down, range will go

upward; the minimum range is transformed if "RANGE"

is put down at the maximum range. If the "RANGE" button

is put down more than two seconds, auto range is used again.

4.5 Auto Power Off

If there’s no any operation within fifteen minutes after

power is on, meter will auto power off with five short

sounds and a long sound in a minute.

After auto power off, if stir the transform switch or put

down any button of “FUNC.”, “MAX.H”, ”RANGE”,

meter will recover the working condition.

If presses the “DATA-H” button when power is on,

auto power off disable. In sleep mode, the auto power

off function will be cancelled if presses the “DATA-H”

button to wake the meter.

4.6.1 Set the transform switch to the right range. At the

manual range, when the value scale to be measured

is unknown beforehand, select the highest range.

4.6 Preparation For Measurement

4.6.2 When measuring, at first, connect to the public (COM)

testing line, then connect the probe tip of the meter to

the circuit under test.

4.6.3 If the battery voltage is less than 2.4V, display will show

“ ”, the battery should be changed at this time.

4.7 DC Voltage Measuring

WARNING

Risk of Electrocution.

You can't input the voltage which is higher than

600V DC, it's possible to show higher voltage,

but it may damage the inner circuit or cause

electrical shock.

Pay attention to avoid getting an electric shock

when measuring high voltage.

4.7.1 Rotate the probe socket clockwise to spin out the

probe from the meter.

4.7.2 Insert the black test lead or test clip in the COM jack.

4.7.3 Set the transform switch at the V range position.

4.7.4 Press the "FUNC." Button to transform to DC

measurement. Auto range and manual range can be

transformed by pressing the “RANGE” button.

WARNING

Risk of Electrocution.

You can’t input the voltage which is higher than

600V rms AC, it’s possible to show higher

voltage, but it may damage the inner circuit or

cause electrical shock.

Pay attention to avoid getting an electric shock

when measuring voltage.

13 1 4

4.8.1 Rotate the probe socket clockwise to spin out the

probe from the meter.

4.8.2 Insert the black test lead or test clip in the COM jack.

4.8.3 Set the transform switch at the V range position.

4.8.4 Press the “FUNC”. button to transform to AC

measurement. Auto range and manual range can be

transformed by putting the “RANGE”button.

4.8.5 Connect the probe tip of the meter to one side of the

tested circuit and probe tip of the test lead (or test

clip) to the other side.

4.8.6 You can get reading from LCD display.

4.8 Measuring AC Voltage

4.7.5 Connect the probe tip of the meter and probe tip of the

test lead (or test clip) across the power source or be

loaded on the two sides under measurement.

4.7.6 You can get a reading from LCD display. The polarity

of the tested terminal which the tip of the meter

connection will be indicated.

- At the little voltage range, the meter will show unsteady

reading when test leads haven't reach the circuit, it’s

normal because the meter is very sensitivity. When meter

touch the circuit, you can get the true reading.

- At the manual range mode, when only the figure ‘OL’ is

displayed, it indicates overrange situation and the higher

range has to be selected.

- At the manual range mode, when the value scale to be

measured is unknown beforehand, select the range to

the highest position and set down gradually.

NOTE:

- At the manual range mode, when only the figure ‘OL’ is

displayed, it indicates overrange situation and the

higher range has to be selected.

- At the little voltage range, the meter will show unsteady

reading when test leads haven't reach the circuit, it’s

normal because the meter is very sensitivity. When test

leads touch the circuit, you can get the true reading.

- At the manual range mode, when the value scale to be

measured is unknown beforehand, select the range at

the highest position and set down gradually.

- Transform to the manual range when use the mV

range.

15 1 6

4.9 Measuring Resistance

4.9.1 Rotate the probe socket clockwise to spin out the

probe from the meter.

4.9.2 Insert the black test lead or test clip in the COM jack.

4.9.3 Set the transform switch at the range position. Auto

range or manual range can be transformed by

putting the “RANGE”

4.9.4 Connect the probe tip of the meter to one side of the

tested circuit and probe tip of the test lead (or test

clip) to the other side.

4.9.5 You can get reading from LCD display.

button.

WARNING

Risk of Electrocution.

When measuring in-circuit resistance, be sure

the circuit under test has all power removed

and that all capacitors have been discharged

fully.

NOTE:

- At the manual range mode, when only the figure ‘OL’ is

displayed, it indicates overrange situation and the

higher range has to be selected.

- For measuring resistance above 1MΩ, the meter may

take a few seconds to get stable reading.

- When the input is not connected, i.e. at open circuit,

the figure ‘OL’ will be displayed for the overrange

condition.

4.10 Testing Diode

4.10.1 Rotate the probe socket clockwise to spin out the

probe from the meter.

4.10.2 Insert the black test lead or test clip in the COM

jack.

4.10.3 Set the transform switch at the range position.

4.10.4 put down the “FUNC.” button transformed at test.

4.10.5 Connect the probe tip of the meter to the anode of

the diode, the black test lead (or test clip) to the

cathode of the diode.

4.10.6 You can get reading from LCD display.

NOTE:

- The meter will show the approximate forward voltage

drop of the diode.

- If the meter and the lead connection is reversed, only

figure ‘OL’ will be displayed.

- When the input is not connected, i.e. at open circuit,

the figure ‘OL’ will be displayed.

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