Mastech MS2109A Manual de usuario

MS2109A

User Manual

AC/DC Clamp Meter

Hz%

TEMP

MS2109A

AC/DC CLAMP METER

NCV

SEL

REL Hz%

MAX/MIN

CONTENTS

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

1.1 Preparation.......................................1

CONTENTS

1.2 Usage................................................2

1.3 Signs and Labels................................3

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

2. Description….................................4

2.1 Part Name..........................................5

2.2 Switch and Button Description..............7

2.3 LCD Display........................................8

3. Specification…...............................9

3.1 General..............................................9

3.2 Technique Data...................................9

4. Operating guidance.......................15

4.1 Reading Hold....................................15

4.2 Measuring Range Switch....................15

4.3 Frequency/Duty Ratio Switch.............15

4.4 Maximum/Minimum

Measurement Choice....................16

4.5 Function Choice..................................17

4.6 Relative Measurement and

Surge Measurement..........................17

4.7 Back Light and Clamp Head Light..........17

4.8 Automatic Power-Off

4.9 Measurement Preparation....................18

4.10 Current Measurement........................19

4.11 Voltage Measurement........................20

4.12 Frequency and

Duty Ratio Measurement

4.13 Resistance Measurement..................23

4.14 Diode Test

4.15 Circuit Continuity test

4.16 Capacitance Measurement................25

5. Maintenance...................................27

5.1 Replace Battery...................................27

5.2 Replace Probe

6. Accessories....................................27

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

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

..................21

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

4.17 NCV Measurement............................26

4.18 Temperature Measurement................26

....................................27

1. Safety Information

1.2 Usage

Please particularly note that inappropriate use

may cause shock or damage to the meter. When

using the meter, comply with common safety

procedures and completely follow the safety

measures in this operation manual.

To make full use of the meter's functions and

ensure safe operation, please carefully read and

follow the procedures in the operation manual.

The meter meets GB/T 13978-92 digital multimeter

general technology conditions, GB4793.1-1995 (IEC

61010-1, IEC 61010-2-032) electronic measurement

instrument safety requirements with secondary pollution

and over-voltage standard of CAT III 600V.

Please follow the safety operation guidelines to ensure

the safe use of meter.

The meter will provide satisfactory service to you if you

use and protect it appropriately.

Warning

1.1 Preparation

1.1.1 When using the meter, the user should comply with

standard safety rules:

- General shock protection

- Prevent misusing the meter

1.1.2 After receiving the meter, please check for damage

that may have occurred during transportation.

1.1.3 If the meter is stored and shipped under hard

conditions, please confirm that the meter is

undamaged.

1.1.4 Probe should be in good condition. Before use,

please check whether the probe insulation is

damaged, whether metal wire is bare.

1.1.5 Use the probe table provided with the meter to

ensure safety. If necessary, replace the probe

with another identical probe or one with the same

specification.

1.2.1 When using the meter, select the right function

and measuring range.

1.2.2 Don't measure when exceeding the maximum

value in each measuring range.

1.2.3 When measuring a circuit with the meter

connected, do not touch the probe tip (metal part).

1.2.4 When measuring, if the voltage to be measured

is more than 60 V DC or 30 V AC (RMS), always

keep your fingers behind the finger protection

device.

1.2.5 Do not measure voltage greater than AC 600V.

1.2.6 In the manual measuring range, when the value

to be measured is not known in advance, choose

the highest measuring range to begin, and then

gradually select lower ranges until the correct

range is identified.

1.2.7 Before rotating conversion switch to change

measuring function, remove probe from the

circuit to be measured.

1.2.8 Don't measure resistors, capacitors, diodes and

circuits that are energized.

1.2.9 During the test of current, resistors, capacitors,

diodes and circuit connections, do not allow the

meter to connect with voltage source.

1.3 Part name

Note (Important safety information. Refer to the

operation manual).

Dangerous electric conductor.

Double insulation protection (class II).

CAT III According to pulse voltage tolerance protection

level provided by IEC 61010-1 standard

overvoltage (installation) level III and grade

2 for pollution.

The meter complies with EU standard

Ground (earth)

1.4 Maintenance

1.4.1 Don't try to open the meter bottom case to adjust or

repair. Such operations only can be made by

qualified technicians who fully understand the

meter and electrical shock hazard.

1.4.2 Before opening the meter bottom case or battery

cover, remove probe from the circuit to be measured.

1.4.3 To avoid wrong readings and potential electric

shock, when “ ”appears on the meter display,

replace the battery immediately.

1.4.4 Clean the meter with damp cloth and mild

detergent. Do not use abrasives or solvents.

1.4.5 Power off the meter when it is not used. Switch the

transfer switch to OFF position.

1.4.6 If the meter is not used for long time, please take

the battery out to prevent the meter being damaged.

1.2.10 Don't measure capacitance unless the capacitor

is discharged completely.

1.2.11 Don't use the meter in explosive gas, vapor or

dusty environments.

1.2.12 If you find any abnormal condition or failure on

the meter, stop using the meter and have it

serviced by a qualified technician.

1.2.13 Unless the meter bottom case and the battery

cover are completely fastened in their original

places, do not use the meter.

1.2.14 Don't store or use the meter in direct sunlight,

high temperature or high humidity.

2. Description

- The meter is a portable, professional measuring

instrument with LCD display and back light for easy

reading by users. Measuring range switch is operated

by single hand for easy operation. The meter has

overload protection and low battery indicator. It is an

ideal multifunction meter for professionals, factories,

schools, fans and family use.

- The meter is used to measure AC current, DC current,

voltage, DC voltage, frequency, duty ratio, resistance,

capacitance, circuit connections, diodes, non-contact

voltages and temperatures.

- The meter has an auto measuring range function.

- The meter has a reading hold function.

- The meter has a max. measuring function.

- The meter has a min. measuring function.

(1) Current clamp head: used for current measurement.

(2) NCV indicator

(3) Key

(4) LCD display

(5) Common end jack

(6) Resistance, capacitance, voltage, frequency, diode,

continuity and temperature input jack

(7) Knob

(8) Clamp head center position

(9) NCV sense position

2.1 Part name

- The meter has a clamp head frequency measurement

function.

- The meter has an auto power-off function.

- The meter has a relative measuring function.

Hz%

TEMP

MS2109A

AC/DC CLAMP METER

NCV

SEL

REL Hz%

MAX/MIN

2.2 Switch, Button and Input Jack Description

B.L/HOLD button: used for reading hold or

back light control

MAX/MIN button: used for maximum/minimum

measurement function switch.

SEL button: used for measuring function switch.

NCV button: Non-contact voltage detection switch.

REL button: used for entering relative measurement state.

Hz/% button: used for frequency and duty ratio

measurement function switch.

OFF position: used for shutting off the power.

INPUT jack: voltage, resistance, frequency, duty ratio,

capacitance, diode, circuit connection,

temperature measurement input wire

connecting terminal.

COM jack: voltage, resistance, frequency, duty ratio,

capacitance, diode, circuit connection,

temperature measurement common wire

connecting terminal.

Transfer switch: used for selecting function and

measuring range.

2.3 LCD Display

ALTERNATING CURRENT, direct current

Diode, continuity

Automatic measuring range mode

Maximum measurement state

AUTO

Minimum measurement state

Relative measurement mode

MAX

MIN

Automatic power-off state

REL

LOW BATTERY

Reading hold state

Percentage (duty ratio)

Millivolt, Volt (voltage)

mV, V

AAmperes (Current)

nF, μF Nanofarad, Microfarad

Ohm, Kilohm, Megohm (resistance)

Ω,kΩ, MΩ

Hz,kHz,MHZ Hertz, Kilohertz, Megahertz (frequency)

Celsius degree, Fahrenheit degree

(temperature)

°C,°F

3. Specifications

At least once a year, the meter should be recalibrated

in temperatures of 18°C ～ 28°C and relative humidity

less than 75%.

3.1 General

Auto measuring range.

Full measuring range overload protection.

The maximum allowable voltage between measurement

end and ground: 600V DC or 600V AC

Operational height: maximum 2000m

Display: LCD

Displayed maximum value: 5999 digit.

Polarity indication: automatic indication, '-' means

negative polarity.

Exceeding measuring range display: '0L' or '-0L'.

Sampling rate: about 3 times/s, simulation bar 30 times/s.

Unit display: has function and power unit display.

Auto off time: 15 min

Power supply: 1.5V 3AAA battery.

Battery undervoltage indication: LCD displays symbol.

Temperature coefficient: less than 0.1x accuracy°C

Operating temperature: 18°C~28°C.

Storage temperature: -10°C~50°C

Dimension: 220×81×41mm

Weight: about 286g (include battery)

3.2 Technical Indicators

Environment temperature: 23±5°C, relative humidity

(RH): <75%

3.2.1 AC Current

Measuring

range Resolution Accuracy

±(2.5% of reading + 6 digits)

60A

600A

0.01A

0.1A

- Maximum input current: 600A AC

- Frequency range: 40~400Hz

3.2.3 DC Voltage

600mV

0.01V

0.1V

±(0.7% of reading + 2digits)

60V

600V

0.1mV

0.001V

- Input impedance: 10MΩ

- Maximum input voltage: 600V AC (RMS) or 600V DC

3.2.2 DC Current

±(3.0% of reading + 6 digits)

60A

600A

0.01A

0.1A

- Maximum input current: 600A DC

Measuring

range Resolution Accuracy

Measuring

range Resolution Accuracy

3.2.4 AC Voltage

0.01V

0.1V

±(0.8% of reading + 3 digits)

60V

600V

0.001V

1V ±(1.0% of reading + 4 digits)

- Measuring scope: 40Hz ~ 10kHz

- The input voltage range: > 600mV AC (RMS) (input

voltage will increase when the frequency to be

measured increases)

- Input impedance: 10MΩ

- Maximum input voltage: 600V AC (RMS)

- Input impedance: 10MΩ

- Maximum input voltage: 600V AC (RMS) or 600V DC

- Frequency range: 40 ~ 400Hz

3.2.5 Frequency

3.2.5.1Clamp head measuring frequency

(through grade A):

± (1.5% of reading + 5 digits)

99.99Hz

999.9Hz 0.1KHz

0.01KHz

- Measuring scope: 40Hz ~ 1kHz

- The input signal range: > 6A AC (RMS) (input current

will increase when the frequency to be measured

increases)

- Maximum input current: AC 600A (RMS)

3.2.5.3 Through grade HZ/DUTY:

9.999Hz

±(0.5% of reading + 3 digits)

99.99Hz

0.001KHz

0.01Hz

0.001Hz

0.1Hz999.9Hz

9.999KHz

99.99KHz

999.9KHz

9.999MHz 0.001MHz

0.1KHz

0.01KHz

- Overload protection: 250V DC or AC (RMS)

- The input voltage range: > 2V (input voltage will

increase when the frequency to be measured

increases)

Note:

In the small voltage measuring range, the probe is not

connected with the circuit to be tested, and the meter

may have fluctuating readings. This is normal and

caused by the meter's high sensitivity. It does not

affect actual measurement results.

Measuring

range Resolution Accuracy

Measuring

range Resolution Accuracy

± (1.5% of reading + 5 digits)

99.99Hz

999.9Hz 0.1Hz

0.01Hz

Measuring

range Resolution Accuracy

9.999kHz 0.001KHz

3.2.5.2 Through grade V:

Measuring

range Resolution Accuracy

Resolution Accuracy

600Ω

6kΩ

0.1kΩ

0.001kΩ

0.1Ω

0.01kΩ

0.1MΩ

0.001MΩ

Function

0.001V

If the resistance of circuit to be

measured is less than 70Ω, the

meter's built-in buzzer may sound.

3.2.6.2 Through grade V:

- Frequency response: 40 ~ 10kHz

- Input voltage range: > 600mV AC

- Input impedance: 10MΩ

- Maximum input voltage: 600V AC (RMS)

3.2.6.2 Through grade HZ/DUTY:

- Frequency response: 1 ~ 10MHz

- The input voltage range: >2V AC (RMS) (input

voltage will increase when the frequency to be

measured increases)

- Maximum input voltage: 250V AC (RMS)

3.2.7 Resistance

60kΩ

600kΩ

6MΩ

60MΩ±(1.2% of reading + 3 digits)

- Open circuit voltage: about 0.4V

- Overload protection: 250V DC or AC (RMS)

3.2.8 Circuit Continuity Test

- Overload protection: 250V DC or AC (RMS)

0.1Ω

Display approximate diode

forward voltage value

3.2.10 Diode Test

- Forward DC current is about 1mA

- Backward DC voltage is about 3.3V

- Overload protection: 250V DC or AC (RMS)

Accuracy

40nF

±(4.0% of reading + 5 digits)

0.01μF

0.1nF

0.01nF

0.001μF

0.001mF

0.1μF

3.2.9 Capacitance

4μF

- Overload protection: 250V DC or AC (RMS)

400nF

40μF

400μF

4000μF

3.2.6.1Through grade A (from clamp head):

- Frequency response: 40 ~ 1kHz

- Input current range: >6A AC (RMS)

- Maximum input current: AC 600A

3.2.6 Duty Ratio

Measuring range Resolution Accuracy

0.1%-99.9% 0.1% ±(3%+5)

Measuring range

±(0.8% of reading + 3 digits)

Measuring

range Resolution

Measuring

range Resolution

Measuring

range Resolution Function

4. Operating Guidance

1) In the process of measurement, if reading hold is

required, press “HOLD/B.L” key. The display value

in the display will be locked. Press “HOLD/B.L”

key again to release reading hold.

4.1 Reading Hold

4.2 NCV Key

NCV key is used for non-contact voltage detection.

Press this key and hold it. Place the NCV sensor

zone close the conductor to be detected. It voltage

is more than AC 90V, NCV indicator will flash and

the buzzer will sound at regular intervals.

4.3 Frequency/Duty Ratio Switch

1) When the meter is in AC voltage, AC current position,

if “Hz/%” button is pressed, the meter will measure

AC voltage and AC current signal frequency. Click

“Hz/%” button again, and the meter will measure

voltage and current signal duty ratio. If it is in

HZ/DUTY position, pressing HZ % key will switch

between HZ and DUTY.

4.4 Maximum/Minimum Measurement Choice

1) Press “MAX/MIN” key to enter MAX mode, and

always store measurement maximum value. Press

“MAX/MIN” key again, and the meter will enter

minimum value measurement state. Press

“MAX/MIN” key for the third time, and the meter

will display the difference of maximum and minimum

value. Press “MAX/MIN” key to cycle through the

above operations.

2) After entering MAX or MIN mode, the meter will

automatically save the measured maximum or

minimum value.

3) If the user presses “MAX/MIN” key more than 2 sec,

the meter will restore normal measuring range.

1) When the meter is in the maximum/minimum value

measurement state, it is manual measuring range

mode.

2) When the meter is in the frequency, duty ratio

measurement state, it can't be switched to

maximum/minimum value measurement mode.

3) When the meter is in the maximum/minimum value

measurement state, SEL, REL key is invalid.

Note:

3.2.11 Temperature

Measuring

range Resolution Accuracy

-20°C~0°C ±(3.0% of reading + +4 digits)

1°C~400°C

401°C~1000°C

1°C ±(1.0% of reading + +3 digits)

±2.0% of reading

Note:

When the meter is in the maximum/minimum value

measurement state, it can't be switched to frequency,

duty ratio measurement mode.

2) If “Hz/%” button is pressed again, the meter will

revert to voltage, current measurement state.

- Temperature indicator does not include thermocouple error.

- Overload protection: 250V DC or AC (RMS)

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