Pro's Kit MT-3109 Bedienungsanleitung

MT-3109

AC/DC Digital Clamp Multimeter

User’s Manual

1st Edition,2011

MT-3109 AC/DC Digital Clamp Multimeter

Overview

This Operating Manual covers information on safety and

cautions. Please read the relevant information carefully and

observe all the Warnings and Notes strictly.

Warning

To avoid electric shock or personal injury, read the “Safety

Information" and "Rules for Safe Operation" carefully before

using the meter. Digital Clamp Multimeter Model (hereafter

referred to as "the Meter") is 3 3/4 digits with steady operations,

fashionable structure and highly reliable measuring instrument.

The Meter uses large scale of integrated circuit with double

integrated A/D converter as its core and has full range overload

protection

The Meter can not only measure AC/DC Voltage, AC/DC

Current, Frequency, Duty Cycle, Resistance, Diodes, Continuity

but also it has Data Hold, Sleep Mode and Relative Mode

features.

Unpacking Inspection

Open the package case and take out the Meter. Check the

following items carefully to see any missing or damaged part:

Item Description Qty

1 User’s manual 1 piece

2 Test Lead 1 pair

3 Test Clip 1 pair

4 Carrying Bag 1 piece

In the event you find any missing or damage, please contact

your dealer immediately.

Safety Information

This Meter complies with the standards IEC61010: overvoltage

category (CAT.II 600V) and double insulation.

CAT. II: Local level, appliance, PORTABLE EQUIPMENT etc.,

with smaller transient over voltages than CAT.III

CAT. III: Distribution level, fixed installation, with smaller

transient over voltages than CAT. IV

MT-3109 AC/DC Digital Clamp Multimeter

Use the Meter only as specified in this operating manual,

otherwise the protection provided by the Meter may be impaired.

In this manual, a Warning identifies conditions and actions that

pose hazards to the user, or may damage the Meter or the

equipment under test. A Note identifies the information that user

should pay attention to International electrical symbols used on

the Meter and in this Operating Manual are explained on page

Rules for Safe Operation

Warning

To avoid possible electric shock or personal injury, and to avoid

possible damage to the Meter or to the equipment under test,

adhere to the following rules:

Before using the Meter inspect the case. Do not use the

Meter if it is damaged or the case (or part of the case) is

removed. Look for cracks or missing plastic. Pay attention to

the insulation around the connectors.

Inspect the test leads for damaged insulation or exposed

metal. Check the test leads for continuity. Replace damaged

test leads with identical model number or electrical

specifications before using the Meter.

Do not apply more than the rated voltage, as marked on the

Meter, between the terminals or between any terminal and

grounding If the value to be measured is unknown, use the

maximum measurement position and reduce the range step

by step until a satisfactory reading is obtained

When measurement has been completed, disconnect the

connection between

The test leads and the circuit under test, remove the testing

leads away from the input terminals of the Meter and turn the

Meter power off.

The rotary switch should be placed in the right position and

no any changeover of range shall be made during

measurement is conducted to prevent damage of the Meter.

MT-3109 AC/DC Digital Clamp Multimeter

Do not carry out the measurement when the Meter's back

case and battery compartment are not closed to avoid

electric shock.

Do not input higher than 600V between the two Meter's input

terminal to avoid electric shock and damages to the Meter.

When the Meter working at an effective voltage over 60V in

DC or 30V rms in AC, special care should be taken for there

is danger of electric shock.

Use the proper terminals, function, and range for your

measurements.

Do not use or store the Meter in an environment of high

temperature, humidity, explosive, inflammable and strong

magnetic field. The performance of the Meter may

deteriorate after dampened.

When using the test leads, keep your fingers behind the

finger guards.

Disconnect circuit power and discharge all high-voltage

capacitors before testing resistance, continuity and diode.

Replace the battery as soon as the battery indicator

appears. With a low battery, the Meter might produce false

readings that can lead to electric shock and personal injury.

When servicing the Meter, use only the same model number

or identical electrical specifications replacement parts.

When servicing the Meter, use only the same model number

or identical electrical specifications replacement parts.

The internal circuit of the Meter shall not be altered at will to

avoid damage of the Meter and any accident.

Soft cloth and mild detergent should be used to clean the

surface of the Meter when servicing. No abrasive and solvent

should be used to prevent the surface of the Meter from

corrosion, damage and accident.

The Meter is suitable for indoor use.

Turn the Meter off when it is not in use and take out the

battery when not using for a long time.

Constantly check the battery as it may leak when it has been

using for some time, Replace the battery as soon as leaking

appears. A leaking battery will damage the Meter.

MT-3109 AC/DC Digital Clamp Multimeter

International Electrical Symbols

AC (Alternating Current)

DC (Direct Current)

AC or DC

Grounding

Double Insulated

Warning. Refer to the Operating Manual

Deficiency of Built-In Battery

Continuity Test

Diode

Capacitance Test

Fuse

Conforms to Standards of European Union

The Meter Structure (see figure 1)

1. Input

Terminals

2. LCD Display

3. Functional Buttons

4. Rotary Switch

5. Trigger: press the lever to open the

transformer jaw

6. Hand Guards: to protect user's hand

from touching the dangerous area.

7. Transformer Jaw: designed to pick

up the AC and DC current flowing

through the conductor. It could transfer current to voltage.

The tested conductor must vertically go through the Jaw

center.

ure.1

MT-3109 AC/DC Digital Clamp Multimeter

Rotary Switch

Below table indicated for information of rotary switch positions.

Rotary Switch

Position Function

OFF Power is turned off

V AC or DC voltage measurement

ΩResistance measurement

/ : Diode test : Continuity test

Hz / Duty %

Frequency Measurement and Duty

Measurement

Capacitance test range from 40.OOnF to

1OO.OuF

40A & 400A AC and DC current measurement range

Functional Buttons

Below table for information of functional button operations.

Button Operation Performed

HOLD

●Press HOLD to enter the Hold mode in any mode,

the Meter beeps.

●Press HOLD again to exit the Hold mode, the

Meter beeps.

ELA

At and Ωrange:

Press select manual ranging measurement mode.

The Meter is default to auto ranging measurement

mode.

When the Meter is at manual ranging measurement

mode, press to step down the range.

At range:

Press enter to the REL mode. It subtracts a stored

value from the present measurement value and

displays a result.

At Hz/Duty% range:

Press switch to between Hz measurement mode and

Duty % measurement mode.

MT-3109 AC/DC Digital Clamp Multimeter

Button Operation Performed

Select

Press SELECT button to select the alternate

functions marked in blue color on the Meter's

faceplate including Hz, Duty%, , ,

40 , and 400 .

After the Meter entering Sleep Mode, press and

hold SELECT to turn the Meter on, it will disable the

Sleep Mode feature.

The Effectiveness of Functional Buttons

Not every functional buttons can be used on every rotary switch

positions. Below table describe which functional buttons can be

used on which rotary switch positions

Rotary Switch Functional Buttons

Positions SELECT RELA HOLD

●●●

ΩN/A ●●

/ ●N/A ●

Hz / Duty% N/A ●●

40 ●●●

400 ●●●

N/A ●●

Display Symbols (see figure 2)

MT-3109 AC/DC Digital Clamp Multimeter

No. Symbol Meaning

1 AC Indicator for AC voltage or current

2 DC Indicator for DC voltage

The battery is low.

Warning: To avoid false readings, which

could lead to possible electric shock or

personal injury, replace the battery as

soon as the battery indicator appears.

The Meter is in the auto range mode in

which the Meter automatically selects the

range with the best resolution.

5 Test of diode

6 The continuity buzzer is on

7 %

Indicator for Duty.

Data hold is active

9 Indicator for REL mode

Ω,KΩ,

MΩ

Ω: Ohm. The unit of resistance.

kΩ: Kilohm. 1x103or 1000 ohms

MΩ: Megohm. 1x106or 1,000,000 ohms

11 Hz

The unit of Frequency

12 A

Amperes (amps). The unit of current.

13 mV, V Volts. The unit of voltage.

mV: Millivolt. 1xl0-3 or 0.001 volts

14 Indicates negative reading

15 TRMS Indicator for TRMS mode

16 F,nF,uF, Farad. The unit of capacitance.

17 OL The input value is too large for the selected

range

MT-3109 AC/DC Digital Clamp Multimeter

Measurement Operation

A. DC/AC Voltage Measurement

(see figure 3)

Warning

To avoid harms to you or

damages to the Meter from

electric shock, do not attempt

to measure voltages higher

than 600V AC/DC, although

readings may be obtained

The DC Voltage ranges are: 400mV, 4V, 40V, 400V and 600V.

The AC Voltage ranges are: 4V, 40V, 400V and 600V.

To measure DC voltage, connect the Meter as follows:

(1) Insert the red test lead into the Hz Duty% VΩ

terminal and the black test lead into the COM terminal.

(2) Set the rotary switch to . DC measurement mode and

auto ranging is a default.

(3) Press SELECT to switch to AC measurement mode or

press REL to switch to manual ranging measurement

mode.

(4) Connect the test leads across with the object being

measured. The measured value shows on the display.

Note

A. When DC/AC voltage

measurement has been completed,

disconnect the connection between

the testing leads and the circuit

under test and remove testing

leads from the input terminals.

B. Measuring Resistance (see figure

MT /DC Digital Clamp Multimeter-3109 AC

Warning

To avoid damages to the Meter or to the devices under test,

disconnect circuit power and discharge all the high-voltage

capacitors before measuring resistance.

The resistance ranges are:

400Ω, 4kΩ, 40kΩ,400kΩ,4 MΩand 40MΩ.

To measure resistance, connect the Meter as follows:

1. Insert the red test lead into the Hz Duty% terminal

and the black test lead into the COM terminal.

2. Set the rotary switch to Ω. Resistance measurement is

default to auto range mode, press RELA to switch to manual

ranging measurement mode.

3. Connect the test leads across with the object being

measured. The measured value shows on the display.

Note

To obtain a more precise reading, you could remove the

objects being tested from the circuit when measuring,

When resistance measurement has been completed,

disconnect the connection between the testing leads and the

circuit under test and remove testing leads from the input

terminals.

C. Testing Diodes (see figure 5)

Warning

To avoid damages to the Meter or

to the devices under test,

disconnect circuit power and

discharge all the high-voltage

capacitors before testing diodes.

Use the diode test to check diodes,

transistors, and other semiconductor

devices. The diode test sends a

current through the semiconductor junction, then measure the

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