Mastech MS2025A Manual de usuario

MS2025A

Digital Clamp Meter

Operation Manual

CAT III

1000V

CONTENTS CONTENTS

1. Safety Information

1.1 Preliminary

1.2 Usage

1.3 Symbols

1.4 Maintenance

2. Description

2.1 Part Name

2.2 Switch, Button And Input Jack Description

2.3 LCD Display

3. Specifications

3.1 General

3.2 Technical Indicators

4. Operating Guidance

4.1 Reading Hold

4.2 Manual Measuring Range

4.3 Frequency/Duty Ratio Switch

4.4 Max./Min. Measurement Choice

4.5 Function Switch

4.6 REL/INRUSH Measurement

4.7 Back Light And Clamp Head Light

4.8 Automatic Power-Off

4.9 Measurement Preparation

4.10 Current Measurement

4.11 Voltage Measurement

4.12 Frequency And Duty

Ratio Measurement

4.13 Resistance Test

4.14 Diode Test

4.15 Circuit Continuity Test

4.16 Capacitance Measurement

5. Maintenance

5.1 Replace Battery

5.2 Replace Probe

6. Accessories

4.17 NCV Measurement

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1.2.13 Unless the meter bottom case and the battery

cover are completely fastened completely, do not

use the meter.

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 1000V, and pollution degree 2 and

safety requirements for hand-held clamps for electrical

measurement and test.

03 04

1.3 Symbols

1.4 Maintenance

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

repair. Such operations can only be performed by

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 causing 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 the meter is not used.

Switch the measuring range to OFF position.

1.4.6 If the meter is not used for long time, remove the

battery to prevent the meter being damaged.

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 with overload protection

and low battery indicator. It is an ideal multifunction

meter for professionals, factories, schools, fans and

family use.

- The meter is used for AC current, DC current, AC voltage,

DC voltage, frequency, duty ratio, resistance,

capacitance measurement, circuit connection, diode

test and non-contact voltage detection.

- The meter has automatic measuring range and manual

measuring range.

- The meter has reading hold function.

- The meter has max. measuring function.

- The meter has min. measuring function.

- The meter has clamp head frequency measurement

function.

- The meter has auto power-off function.

- The meter has relative measuring function.

1.2.14 Don't store or use the meter in the conditions of direct

sunlight, high temperature and high 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

Both direct and alternating current

CAT III

It is applicable to test and measuring circuits

connected to the distribution part of the

building's low-voltage MAINS installation.

05 06

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

(2) Clamp head light

(3) Panel

(4) Trigger

(5) Function choice button (FUNC)

(6) Relative measurement button

(7) Frequency/duty ratio switch button (Hz/%)

(8) LCD display

(9) Common end jack

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

and continuity input jack

(11) Maximum/minimum choice button (MAX/MIN)

(12) Reading hold/Back light button (B.L/ HOLD)

(13) Transfer switch

(14) NCV indicator

2.1 Part Name

109

(15) Protective Barrier

(to warn the operator of the limit of safe access)

Battery undervoltage indication: LCD displays symbol.

Temperature coefficient: less than 0.1×accuracy/°C

Operational temperature: 18°C~28°C

Storage temperature: -10°C~50°C

Dimension: 238×92×50mm

Weight: about 420g (include battery)

3. Specifications

Automatic measuring range and manual measuring range.

Full measuring range overload protection.

The maximum allowable voltage between

measurement end and ground: 1000V DC or 750V AC

Operational height: maximum 2000m

Display: LCD

Displayed maximum value: 5999 digit.

Polarity indication: automatical indication, '-' means

negative polarity.

Exceeding measuring range display: 'OL' or '-OL'.

Sampling rate: about 3 times/sec.

Unit display: has function and power unit display.

Auto off time: 15 min

Power supply: DC 9V battery (type NEDA 1604, 006P or

6F22)

The meter should be recalibrated under the condition of

18°C~28°C, relative humidity less than 75% with the

period of one year.

3.1 General

3.2 Technical Indicators

Environment temperature: 23±5°C, relative humidity

(RH):<75%

3.2.1 True RMS Zero Input Characteristic

3.2.1.1 For measuring non-sinusoidal wave signal, uses

true RMS measuring method, which has less error

than traditional average response measuring

method.

3.2.1.2 The true RMS meter can accurately measure

non-sinusoidal wave signal, but if it is in AC

function mode, when there is no signal to be

measured (input terminal short circuit in AC

voltage mode), clamp meter may show a reading

from 1 to 50. These deviating readings are normal.

In the designated measurement range, they will

not affect the accuracy for multimeter measuring

AC.

3.2.1.3 The true RMS can be measured only when input

signal reaches a certain level. Therefore, the

measuring range of AC voltage and current should

be specified at 2% ~100% of full range.

15 16

- Forward DC current is about 1mA

- Backward DC voltage is about 3.3V

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

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

required, press “HOLD/B.L” key, the value on the

display will be locked. Press “HOLD/B.L” key again to

cancel reading hold state.

4. Operating Guidance

4.1 Reading Hold

4.2 Manual Measuring Range

RANGE key is automatic/manual measuring range key to

trigger mode. The preset one is automatic measuring

range. Press to switch to manual measuring range. In the

manual measuring range mode, click once to change to

upper range. Continue to the top range, then continue to

press this key to change to the bottom range, followed by

recycling. If this key is pressed more than 2 sec, it will

switch back to automatic measuring range state.

In capacitance and frequency measurement state, rhw

manual measuring range button is invalid.

Note:

4.3 Frequency/Duty Ratio Switch

1) When the meter is in AC voltage mode, if “Hz/%” button

is pressed, the meter will measure Hz, and measure AC

voltage, AC current signal frequency. Click “Hz/%”

button again, the meter will measure DUTY cycle, and

measure voltage and current signal duty ratio. If it is in

HZ/DUTY position, pressing HZ % key will switch

between HZ and DUTY by recycling.

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

to voltage, current measurement state.

Note:

The meter is in the maximum/minimum value

measurement state, it can't switch to frequency, duty

ratio measurement mode.

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