Mastech MS8211 User manual

MS8211

DIGITAL MULTIMETER

INSTRUCTION MANUAL

Ω

1.1 Preliminary...............................................1

CONTENTS CONTENTS

1. SAFETY INFORM...............................1 4.4 Range Transform................................10

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

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

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

2. DESCRIPTION...................................4

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.............9

4.1 Data Hold..............................................9

4.2 Maximum Value Measuring

And Hold.............................................10

4.3 Function Transform...............................10

4.5 Auto Power Off....................................10

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

4.7 Measuring DC Voltage........................11

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

4.9 Measuring Resistance........................14

4.10 Diode Testing...................................15

4.11 Continuity Testing.............................16

4.12 AC Voltage Detect.............................17

5. MAINTENANCE............................19

5.1 Maintenance.......................................19

5.2 Test leads Replacement.....................20

6. ACCESSORIES............................20

05 0 6

2.2 Components Elucidation

- Non-contact detecting is convenient to test the socket

or the lead whether is with power or not.

- 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) Sensitivity Adjust Knob

(7) FUNC. Button

(8) RANGE Button

(9) MAX.H Button

(10) DATA-H Button

(11) Panel

(12) LCD Display

(13) COM Jack

- RANGE Button

This button is used to transform Auto range or manual

range.

- FUNC. Button

This button is used to transform function.

- DATA-H Button

This Button is used to hold data.

- MAX.H Button

This button is used to measure and hold the maximum

value.

- Transform Switch

This switch is used to select functions and desired

ranges.

- Probe

Input terminals for V/Ω/ / and AC voltage detector.

- COM Jack

Common terminal for measurement.

- LCD Display

At V/Ω/ / range, the measuring result can be

displayed.

- LED Indicator

At TEST range, ACV detecting result can be indicated.

- Rotatable Probe Socket

Rotating the probe in or out of the meter.

- Protection Ring

To keep the hand from the probe behind the ring.

- Sensitivity Adjust Knob

To adjust the sensitivity while ACV detecting.

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%.

4.6 Preparation For Measurement

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.

4.6.2 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.

11 1 2

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.

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:

15 1 6

- 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

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:

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” 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.

4.11 Continuity Test

WARNING

Risk of Electrocution.

When testing the circuit continuity, be sure

that the power of the circuit has been shut

down and all capacitors have been discharged

fully.

4.11.1 Rotate the probe socket clockwise to spin out the

probe from the meter.

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

jack.

4.11.3 Set the transform switch at the range position.

4.11.4 Put down the “FUNC.” transformed at

continuity test.

Table of contents

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