Mastech MS2128A Manual de usuario

MS2128A

DIGITAL CLAMP METER

OPERATION MANUAL

CAT III

600V

40 0A

REL

1.1 Preliminary

1.2 During use

1.3 Symbols............

CONTENTS CONTENTS

1. Safety Information ...............................1

............................................1

...................................2

.............................3

............7

...................7

..........................15

.................................15

.......................................15

................16

....................................16

....................................3

..............................17

....

1.4 Maintenance............

2. Description...........................................

2.1 Names OF Parts ...................................5

2.2 Switch, Buttons And Input Jacks

2.3

3. Specifications ......................................9

4. Operation Instruction

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

3.1 General Specifications

3.2 Technical Specifications.........................9

4.1 Holding Readings

4.2 Switching Rel

4.3 Switching Frequency Or Duty

4.4 Switching Maximum Or

Minimum Value

4.5 Switching Functions

4.6 Back Light And Clamp Lighting Bulb

4.7 Auto Power Off..........................................18

4.8 Preparing For Measurement

4.9 Measuring Ac Current

4.10 Measuring Dc Current

4.11 Measuring Ac Voltage

4.12 Measuring Dc Voltage

......................18

................................19

..............................20

..............................22

..............................24

..............................26

.......................................29

.............................33

..........................................35

....................................37

...........................39

.......17

4.13 Measuring Frequency

4.14 Measuring Duty

4.15 Measuring Resistance

4.16 Testing Diode

4.17 Testing Continuity

4.18 Measuring Capacitance

5. Maintenance ...........................................41

.............................41

5.1 Replacing The Batteries

5.2 Replacing Test leads .................................43

6. Accessories

............................................43

LCD (Liquid-Crystal Display)

01 02

1. Safety Information

With proper use and care, this digital multimeter will give

you years of satisfactory service.

1.1 Preliminary

1.1.1 When using the meter, the user must observe all

normal safety rules concerning:

- General protection against electric shock

- Protection of the meter against misuse.

1.1.2 When the meter is delivered, check whether it has

been damaged in transit.

1.1.3 After being stored and delivered under harsh

conditions, the meter should be checked and

confirmed whether any damages have been incurred.

1.1.4 Test leads must be kept in good condition. Before

using check whether the insulation on test leads has

been damaged and any wire has been exposed.

1.1.5 Use the test leads supplied to ensure operation

safety. If required, they must be replaced with test

leads of the same model or class.

1.2 During Use

1.2.1 Use the right input jack, function and range.

1.2.2 Do not take measurements that exceed the

protection limit values indicated in the

specifications.

1.2.3 Do not touch the metal tips of the test leads when

the meter is connected to the circuit to be

measured.

1.2.4 Keep your fingers behind the probe barriers when

taking a measurement with an effective voltage

above 60V DC or 30V rms AC.

1.2.5 Do not take voltage measurement if the value

between the terminals and earth ground exceeds

600V.

1.2.6 Select the highest range if the value scale to be

measured in the manual range is unknown.

1.2.7 Disconnect the test leads from the circuit under test

before turning the rotary selector to change

functions.

1.2.8 Do not measure the resistance, capacitance, diode

or continuity of live circuits.

1.2.9 Do not connect the meter to any voltage source

while the rotary selector is in the current,

resistance, capacitance, diode or continuity range.

1.2.10 Do not take capacitance measurements until the

capacitor to be measured has been fully

discharged.

Be extremely careful when using this meter. Improper use of this device

can result in electric shock or destruction of the meter. Take all normal

safety precautions and follow the safeguards suggested in this manual.

To exploit full functionality of the meter and ensure safe operation,

please read carefully and follow the directions in this manual. If the

equipment is used in a manner not specified by the manufacturer, the

protection provided by the equipment may be impaired.

WARNING

This meter is designed and manufactured according to safety

requirements of EN 61010-1, EN 61010-2-032, EN 61010-2-033

concerning electronic measuring instruments with a measurement

CAT III 600V and pollution degree 2 and safety requirements for

hand-held clamps for electrical measurement and test.

1.2.11 Do not use the meter near explosive gases, steam

or dirt.

1.2.12 Stop using the meter if any abnormalities or faults

are observed.

03 04

1.3 Symbols

1.4 Maintenance

1.4.1 Do not attempt to remove the rear case to adjust or

repair the meter. Such actions should only be

performed by a technician who fully understands the

meter and the danger involved.

1.4.2 Before opening the case and battery cover of the

meter, always disconnect test leads from all sources

of electric current. Disconnect the test leads from all

sources of electric current before opening the rear

case and battery cover of the meter.

1.4.3 To avoid any electric shock caused by error readings,

replace the batteries immediately when the “ ” sign

appears on the display.

1.4.4 Use damp cloth and mild detergent to clean the meter;

do not use abrasives or solvents.

1.4.5 Turn the rotary selector to OFF position to switch off

the power when the meter is not in use.

1.4.6 Remove the batteries to avoid damages to the meter

if it will idle for a long time.

2. Description

- This meter is a portable professional measuring

instrument with LCD and back light easily reading. The

'single-hand operation' design for the range switch makes

measurement simple and easy. Overload protection and

low battery indication are provided. It is an ideal multi-

function instrument with scores of practical applications

for professional, workshop, school, hobby and home use.

- The meter can perform measurements of AC/DC voltage

and current, resistance, frequency, duty, capacitance, as

well as continuity and diode test.

- Both auto range and manual range are available.

- This meter is equipped with reading hold function.

- This meter is equipped with true root mean square value

measuring function (at AC A and AC V range).

1.2.13 Do not use the meter unless its rear case and

battery cover is securely fastened in its original

position.

1.2.14 Do not store or use the meter in areas exposed to

direct sunlight, at high temperature or with high

relative humidity.

Note-Important safety information, refer to the

instruction manual.

Conforms to UL STD. 61010-1, 61010-2-032,

61010-2-033; Certified to CSA STD C22.2 NO.

61010-1, 61010-2-032,61010-2-033

Complies with European (EU) safety standards

Earth (ground) TERMINAL

Caution, possibility of electric shock

Equipment protected throughout by double

insulation or reinforced insulation.

Application around and removal from UNINSULATED

HAZARDOUS LIVE conductors is permitted.

Direct current

Alternating current

CAT III: MEASUREMENT CATEGORY III is applicable to

test and measuring circuits connected to the distribution

part of the building's low-voltage MAINS installation.

1.4.1 Do not attempt to remove the rear case to adjust or

repair the meter. Such actions should only be

performed by a technician who fully understands

the meter and the danger involved.

05 06

2.1 Names Of Components

(1) Current Clamp

(2) Clamp Lighting Bulb

(3) Panel

(4) Trigger

(5) Function Switch Button (S E L)

(6) MAX/MIN Switch Button (MAX/MIN)

(7) Relative Switch Button (REL)

(8) Liquid Crystal Display (LCD)

(9) COM Jack

(10) Input Jack

(11) Hz/Duty Switch Button (Hz/%)

(12) Reading Hold/Back Light Button (HOLD/B.L)

(13) Rotary selector

(14) OFF - power switch

(15) “+” Symbol

(16) “-” Symbol

(17) Rear Case

(18) Fixing Screw of Battery Cover

(19) Battery Cover

(20) Protective Barrier (to warn the operator of the limit of

safe access)

- This meter is equipped with inrush current measuring function.

- This meter is equipped with auto zero function (at DCA range).

- This meter is equipped with maximum value measuring

function.

- This meter is equipped with minimum value measuring function.

- This meter can measure frequency by clamp.

- This meter has function of auto power off.

- The normal function of the product may be disturbed by strong

Electro-Magnetic interference. If so, simply reset the product to

resume normal operation by following the instruction manual.

In case the function could not resume, please use the product

in other location.

ACCORD WITH:

IEC 61010-2-032

IEC 61010-2-033

CAUTION

IEC 61010-1

600V CAT III

40 0A

REL

07 08

2.2 Switch, Buttons And Input Jacks

HOLD/B.L Button

- For holding the reading or control backlight

S E L Button

- For switching among measuring functions

REL Button

- The key is the relative value measurement.

Hz/% Button

- For switching between frequency and duty measuring

functions.

MAX/MIN Button

- For switching between maximum and minimum value

measuring function.

Rotary Selector

- For selecting functions and ranges.

OFF Position

- for turning off the power.

INPUT Jack

- For measuring voltage, resistance, frequency, duty,

capacitance, diode, and continuity.

COM Jack

- Common input connection for current, voltage, resistance,

frequency, duty, capacitance, diode, continuity

measurement.

Clamp

- For measuring current

2.3 LCD (Liquid-crystal display)

AC Alternating current

Direct current

Diode test

Continuity buzzer

Auto range mode

The minimum value is being measured.

The mimum value is being measured.

AUTO

MAX

MIN

REL

mV, V

Ω, kΩ,

MΩ

Hz, kHz

nF,μF

Auto power off

Battery low

This indicates that the display data is

being held.

Percent (Duty cycle)

Milli-volts, Volts (Voltage)

Amperes (Current)

Nanofarad, Microfarad

Ohms, Kilo-ohms, Mega-ohms

(Resistance)

Hertz, Kilo-hertz (Frequency), Milohertz

DCA zero and relative measure

3020100

MkΩ

mVA

nμF

MAX MIN

REL

09 10

3. Specifications

Calibration is required once a year, to be carried out at

a temperature between 18°C and 28°C (64F° to 82F°)

and relative humidity below 75%.

3.1 General Specifications

3.1.1 Auto range.

3.1.2 Over range protection is provided for all ranges.

3.1.3 Maximum voltage between terminals and earth

ground: 600V DC or 600 rms AC

3.1.4 Operating altitude: max. 2000 meters (7000 ft.)

3.1.5 Display: 4000 counts with analog bar LCD display

3.1.6 Maximum value display: 4000 digits

3.1.7 Polarity indication: automatic; ‘-’ for negative

polarity.

3.1.8 Over range indication: ‘0L’ or ‘-0L’

3.1.9 Converter Rate: 3 times/sec; Bar graph: 30 times/sec.

3.1.10 Unit indication: function and unit.

3.1.11 Auto power off time: 15 minute.

3.1.12 Operating power : 3× 1.5V AAA batteries

3.1.13 Battery low indication: ‘ ’ on LCD

3.1.14 Temperature factor: < 0.1×Accuracy /°C

3.1.15 Operating temperature: 0°C to 40°C(32°F to 104°F)

3.1.16 Storage temperature: -10°C to 50°C(10°F to 122°F)

3.1.17 Dimension: 208×78×35mm

3.1.18 Weight: approximate 340g(including batteries)

3.2 Electrical Specifications

Ambient temperature: 23±5°C

Relative humidity: < 75%

3.2.1 AC Current

±(2.0% of rdg + 6 digits)

Accuracy

Resolution

0.01A

0.1A

Range

40A

400A

- Max. input current: 400A AC

- Frequency range: 40 to 400Hz

- Response: Average value

3.2.2 DC Current

- Max. input current: 400A DC

±(2.0% of rdg + 6 digits)

Accuracy

Resolution

0.01A

0.1A

Range

40A

400A

3.2.3 DC Voltage

Accuracy

Resolution

0.1mV

0.001V

Range

400mV

0.01V

40V

±(1.0% of rdg + 2digits)

0.1V

400V

±(0.7% of rdg + 2digits)

- Input impedance: 10MΩ

- Max. input voltage: 600V DC

600V ±(0.8% of rdg + 2digits)

11 12

3.2.4 AC Voltage

Accuracy

Resolution

0.001V

0.01V

Range

40V

0.1V

400V

600V

±(0.8% of rdg + 3digits)

±(1% of rdg + 4digits)

- Input impedance: 10MΩ

- Max. input voltage: 600V rms AC

- Frequency range: 40 to 400Hz

- Response: Average value

3.2.5 Frequency

3.2.5.1 By A range ( from current clamp):

±(1.5% of rdg + 5 digits)

Accuracy

Resolution

0.1Hz

Range

10Hz

1kHz

0.0011kHz

>1kHz

- Measurement range: 10 ~ 1kHz

- Input current range: >40A rms AC (higher input

current at higher frequency)

- Max. Input current: 400A rms AC

Note:

At small voltage range, unsteady readings will appear

before the test leads contact the circuit. This is normal

because the meter is highly sensitive. When the test

leads contact the circuit, the true reading will be shown.

3.2.5.2 By ACV range:

Accuracy

Resolution

0.01Hz

0.001kHz

Range

10Hz

1kHz

0.01kHz 10kHz

>10kHz

±(1.5% of rdg + 5 digits)

- Measurement range: 10 ~ 10kHz

- Input voltage range:>0.6V rms AC (higher input

voltage at higher frequency)

- Input impedance: 10MΩ

- Max. input voltage: 600V rms

0.01kHz

3.2.5.3 By Hz/DUTY range

Accuracy

Resolution

0.001Hz

0.01Hz

Range

9.999Hz

99.99Hz

0.1Hz 999.9Hz

9.999kHz ±(0.5% of rdg + 3 digits)

- MAX. Input voltage:600V AC (rms)

0.001kHz

99.99kHz

999.9kHz

9.999MHz 0.001MHz

0.1kHz

0.01kHz

Take it only as referance

13 14

Accuracy

Resolution

0.1Ω

0.001kΩ

Range

400Ω

4kΩ

0.01kΩ 40KΩ

0.1kΩ400kΩ

±(0.8% of rdg +3digits)

0.001MkΩ

4MΩ

0.01MΩ

40MΩ

- Open circuit voltage: 0.23V

3.2.7 Resistance

±(1.2% of rdg + 3digits)

3.2.8 Diode

FunctionResolution

Range

Displaying approximate

for ward voltage of diode

0.001V

- Forward DC current~1mA

- Reversed DC voltage~3.0V

Resolution

Range

Built-in buzzer will sound,

if resistance is lower than

50±20Ω.

0.1Ω

- Open circuit voltage~0.4V

3.2.9 Continuity

3.2.6 Duty Cycle

Accuracy

Resolution

0.1%

Range

1.0% - 99.9%

±3.0%

3.2.6.1 By A range ( from current clamp):

- Frequency response: 10 ~1kHz

- Input current range:> 4A rms AC

- Max. input current: 400A

3.2.6.2 By ACV range:

- Frequency response: 10 ~ 10 kHz

- Input voltage range:>1V rms AC

- Input impedance: 10MΩ

- Max. input voltage: 750V rmsAC

3.2.6.3 By Hz/DUTY range

- Frequency response: 1 ~ 10 MHz

- Input voltage range:>500mV rms 3.2.10 Capacitance

Accuracy

Resolution

0.01nF

Range

40nF

400nF

4µF

0.01µF40µF

±(4.0% of rdg + 5 digits)

0.1µF

400µF

0.1nF

0.001µF

4000µF 1µF

Function

15 16

4. Operation Instruction

4.1 Holding Readings

4.1.1 Press the “HOLD/B.L” button to hold the readings

while taking measurement and the value on the

display will be held.

4.1.2 Press the “HOLD/B.L” button again to release

the reading hold function.

4.2 Switching Rel

1) REL key is the relative value measurement

communication transmission key that acts with

trigger. Press this key will enter into the relative

value measurement mode. The system will save the

display value in the memory as the reference value.

When doing the measurement later, the display

value will be the difference value that the entry

value deducts the reference value.

2) Press REL key will enter into the Manual

Measurement Mode automatically.

3) In REL measurement status, press the key again,

the REL function will be relocked.

4) Press the key in HOLD status, HOLD function will be

cancelled. The system will save the display value in

the memory as the reference value. When doing the

measurement later, the display value is the

difference that the entry value deducts the

reference value.

5) Press SELECT Key or use Mode Switch will cancel

REL measurement mode, and go back to the

normal mode (REL will disappear in the LCD).

6) OL triggering: Under REL mode, OL shows when

input value larger than the allowed value of the

measurement mode. Press the key again, the

relative measurement function will be cancelled.

Disable to enter REL mode when OL shows.

7) No analog section bar function under REL mode.

4.3 Switching Frequency Or Duty

4.3.1 During working at the voltage or current ranges,

press the “Hz/%” button one time, frequency of

the voltage or current will be measured.Press the

“Hz/%” button twice, the meter will be changed

into the duty range for measuring the duty cycle

of the voltage or current. At the same time, the

meter is changed into manual mode.

4.3.2 Press the “Hz/%” button again, meter will be

back to the condition of the voltage or current

measuring.

Note:

During working at maximum or minimum value

measuring function, the meter can't be changed into

frequency or duty cycle measuring mode.

4.4 Switching Maximum Or Minimum Value

4.4.1 press the maxim/minimum button to enter into

the maximum mode, the maximum will always be

measured. and press this button again, it is the

same with the minimum.

4.4.2 After entering into maximum/minimum mode,

there is no more analog function and auto power

off function will also be canceled too.

4.4.3 After entering into maximum/minimum mode,

the maximum/minimum data will be recorded

automatically.

4.4.4 Press the max/min button for more than 2

seconds, it will be set into the normal mode.

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