EMOS EM420B Bedienungsanleitung

EMOS Multimeter EM420B

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130 × 185 mm

MULTIMETER EM420B

Read this owner’s manual thoroughly before use

WARRANTY

This instrument is warranted to be free from defects in material and workmanship

for a period of two year.

Any instrument found defective within two years from the delivery date and returned to

the factory with transportation charges prepaid, will be repaired, adjusted, or replaced

at no charge to the original purchaser. This warranty does not cover expandable items

such as batteries or fuse. If the defect has been cause by a misuse or abnormal operation

conditions, the repair will be billed at a nominal cost.

SAFETY INFORMATION

The multimeter has been designed according to IEC-61010 concerning electronic meas-

uring instruments with a measurement category (CAT II 600V) and Pollution degree2

ELECTRICAL SYMBOLS

AC (Alternating Current)

DC (Direct Current)

DC or AC(alternating current or directive current)

Important safety information. Refer to the manual

Dangerous voltage may be present.

Earth ground

Fuse

Conforms to European Union directives

Double insulated.

Low battery

Diode

The maximum values is being held

The display data is being held

Fahrenheit

Centigrade

Continuity test

Measurement with clamp (optional), widening the eld of applica-

tions of the meter

Autorange

– Danger of electrical injury

Warning, Danger. Please pay attention to the passages of this manual

where this symbol is used.

WARNING

To avoid possible electric shock or personal injury, follow these guidelines:

• Do not use the meter if it is damaged. Before you use the meter, inspect the case.

Pay particular attention to the insulation surrounding the connectors.

• Inspect the test leads for damaged insulation or exposed metal. Check the test

leads for continuity. Replace damaged test leads before you use the meter.

• Do not use the meter if it operates abnormally. Protection may be impaired. When

in doubt, have the meter serviced.

• Do not operate the meter around explosive gas, vapor, or dust.

• Do not apply more than the rated voltage, as marked on the meter, between

terminals or between any terminal and earth ground.

• Before use, verify the meter’s operation by measuring a known voltage.

• When measuring current, turn o circuit power before connecting the meter in

the circuit. Remember to place the meter in the circuit. Remember to place the

meter in series with the circuit.

• When servicing the meter, use only specied replacement parts.

• Use with caution when working above 30V ac rms, 42V peak, or 60V dc. Such

voltages pose a shock hazard.

• When using the probes, keep your ngers behind the nger guards on the probes.

• Connect the common test lead before you connect the live test lead. When you

disconnect test leads, disconnect the live test lead rst.

• Remove the test leads from the meter before you open the case.

• Do not operate the meter with the cover removed or loosened.

• To avoid false readings, which could lead to possible electric shock or personal

injury, replace the batteries as soon as the low battery indicator appears.

• Do not use the test leads to measure the voltage which is more than 600V or the

current which is more than 10A.

• Remaining endangerment: When an input terminal is connected to dangerous live

potentional it is to be noted than this potential at all other terminals can occur!

• CATII-Measurement Category II is for measurements performed on circuits directly

connected to low voltage installation. Do not use the meter for measurements

within Measurement Categories III and IV.

CAUTION

To avoid possible damage to the meter or to the equipment under test, follow

these guidelines:

• Disconnect circuit power and discharge all high voltage capacitors before testing

resistance, continuity, diodes, or capacitance.

• Use the proper terminals, function, and range for your measurements.

• Before measuring current, check the meter’s fuse and turn power OFF to the circuit

before connecting the meter to the circuit.

• Before rotating Function / Range switch to change functions, disconnect test leads

from the circuit under test.

• Before inserting transistor to the adapter , always be sure all the test leads have

been removed from the meter

• Remove test leads from the meter before opening the battery cover or the case.

MAINTENANCE

To continue protection against re, replace fuse only with the specied voltage and

currents rating: F 250 mA L 250V, fast action.

To clean the meter, use a damp cloth and mild detergent only, do not use abrasives

or solvents on it.

GENERAL DESCRIPTION

This digital multimetr is compact 3,5 digits digital multimeter for measuring DC and

AC voltage, DC and AC current, resistance, temperature, diode, transistor, continuity,

capacitance ( only EM420B)and battery(only EM420A). It has the functions of polarity

indication, data hold, maximum value hold, overrange indicator and automatic power-

o. It can be operated easily and is ideal instrument tool.

Instruction

1 DISPLAY – 3,5 digit LCD with a max reading of 1999

2 RANGE button – The meter defaults to the autorange mode when you measure

the voltage, current or resistance. When the meter is in the autorange mode, AUTO

i s displayed.

To enter and exit the manual range mode:

a) Press RANGE button – The meter enters the manual range mode and the symbol

AUTO turns o.

Each press of the RANGE button increments the range. Then the highest range is

reached, the meter wraps to lowest range

b) To exit the manual range mode, press and hold down the RANGE button for

2 seconds, the meter returns to the autorange mode and the symbol AUTO is

displayed again.

3 FUNC. button – When you measure the current, pressing this button will switch

the meter between DC function and AC function.

When you measure the temperature, pressing this button will switch the meter

between °F mode and °C mode

When you measure the diode or the continuity functions.

4 POWER switch – It can be used to turn on/o the meter.

5 FUNCTION/RANGE SWITCH – This switch can be used to select desired function

and range.

6 10A Jack – Plug-in connector for the red test lead for current (200 mA ~10 A)

measurement.

7 COM Jack – Plug-in connector for black(negative) test lead.

8 INPUT Jack – Plug-in connector for the red test lead for all measurement except

current(≥200mA) measurements.

9 Button – To turn on or o the backlight, press and hold this button for about

2 seconds. The backlight will turns o automatically about 15 seconds later after

you turn on it.

10 Button – After pressing the button, the present reading is held on the

display, meanwhile is displayed on the LCD as an indicator. To exit th Hold Mode,

press the button again and the indicator will disappear.

11 Button – The hold the maximum value, press this button and will appear

as an indicator, the meter will hold the maximum of all readings taken since the

button was pressed. To exit the maximum value hold mode, just press this button

again and will disappear.

In some ranges, the maximum value hold mode is not available.

GENERAL SPECIFICATION

Display: LCD, 1999 counts, updates 2–3 times/sec

Overrange Indications: OL shown on display

Battery: 3× 1,5V, AAA

Polarity Indication: „–„ displayed atomatically

Low Battery Indication: shown on display

Overload protection: 250V DC/AC rms

Max. Input Voltage: 200mV

Frequency range: 40Hz – 400Hz

Response: Average, calibrated in rms of sine wave

Resistance

Range Resolution Accuracy

200Ω 0.1Ω ±(1,2%+5)

2kΩ 0.001kΩ

±(1%+5)20kΩ 0.01kΩ

200kΩ 0.1kΩ

2MΩ 0.001MΩ ±(1,2%+5)

20MΩ 0.01MΩ ±(1,5%+5)

Open circuit Voltage: about 0,25V

Overload Protection: 250V DC/AC rms

Temperature

Range Resolution Accuracy

-20 °C ~1000 °C 1 °C

-20 °C ~0 °C: ±(5%+4)

0 °C ~400 °C: ±(1%+3)

400 °C ~1000 °C: ±(2%+3)

0°F ~1800°F 1°F

0°F ~50°F: ±(5%+4)

50°F ~750°F: ±(1%+3)

750°F ~1800°F: ±(2%+3)

Overload Protection: 250V DC/AC rms

Battery (only EM420A)

Range Resolution Function

1.5V 0.01V The approx. Voltage of the

battery is shown on the LCD

3V 0.01V

9V 0.01V

Overload Protection: 1,5V and 3V ranges: F 250 mA L 250V fuse

9V range: 250V DC/AC rms

Test current: 1,5V range: about 50mA

3V range: about 30mA

9V range: about 12mA

Capacitance

Range Resolution Accuracy

20nF 0.01 nF ±(8%+10)

200nF 0.1 nF

±(5%+5)

2µF 0.001 µF

20µF 0.01µF

200µF 0.1µF

1000µF 1µF ±(8%+10)

Overload Protection: 200µF and 1000µF ranges: no overload protection

the other ranges: F 250mA L 250V fuse

Open Circuit Voltage: about 0,5V

Overload Protection: 250V DC/AC rms

Transistor hFE Test

Range hFE Test Current Test Voltage

PNP & NPN 0–1000 Ib ~ 2 µA Vce ~ 1V

Diode and Continuity

Symbol Introduction Remark

The approximate forward vol-

tage drop will be displayed

Open circuit Voltage:

about 1,5V

The built-in buzzer will sound

if the resistance is less than

about 30Ω

Open circuit Voltage:

about 0,5V

Overload Protection: 250V DC/AC rms

For Continuity Test: When the resistance is between 30Ω and 100Ω,

the buzzer may sound or may not sound. When the

resistance is more than 100Ω, the buzzer won´t sound.

OPERATION INTRODUCTION

Measuring Voltage

1. Connect the black test lead to the “COM“ jack and the red test lead to the “INPUT“

jack.

2. Set the range switch to or position. Select auto range or manual range with

the “RANGE“ button.

Operating Temperature: 0 °C to 40 °C, <75%RH

Storage Temperature: -10 °C to 50 °C, <85%RH

Dimensions: 158 × 75 × 35mm

Weight: about 200g (including battery)

Specications

Accuracy is specied for a period of 1 year after calibration and at 18 °C – 28 °C (64°F-

82°F) with relative humidity <75%. Accuracy specications take the form of:

+/- (%of Reading)+(Number of Lest Signicant Digits)

DC Voltage

Range Resolution Accuracy

200mV 0.1mV ±(0,8%+5)

2V 0.001V

±(0,8%+5)20V 0.01V

200V 0.1V

600V 1V ±(1%+5)

Input Impedance: 10MΩ

Overload protection: 600 V DC/AC rms (200 mV range: 250V DC/AC rms)

Max. Input Voltage: 600 V DC

AC Voltage

Range Resolution Accuracy

2V 0.001V

±(1%+5)20V 0.01V

200V 0.1V

600V 1V ±(1,2%+5)

Input Impedance: 10MΩ

Frequency range: 40Hz – 400Hz

Overload protection: 600 V DC/AC rms

Response: Average, calibrated in rms of sine wave

Max. Input Voltage: 600 V AC rms

DC Current

Range Resolution Accuracy

200µA 0.1µA

±(1,2%+5)

2000µA 1µA

20mA 0.01mA

200mA 0.1mA

2A 0.001A ±(2%+10)

10A 0.01A

Overload protection: µA and mA ranges: F 250 mA L 250V fuse

2A and 10A ranges: unfused

Max. Input Current: INPUT jack: 200mA; 10A jack: 10A

(for measurements> 5A: duration <15 seconds,

interval >15 minutes)

Voltage drop: 200µA, 20mA and 2A ranges: 20mV

2000µA, 200mA and 10A ranges: 200mV

Maximum voltage in open circuit must be ≤ 250 V

AC Current

Range Resolution Accuracy

200µA 0.1µA

±(1,5%+5)

2000µA 1µA

20mA 0.01mA

200mA 0.1mA

2A 0.001A ±(3%+10)

10A 0.01A

Overload protection: µA and mA ranges: F 250 mA L 250V fuse

2A and 10A ranges: unfused

Max. Input Current: INPUT jack: 200mA; 10A jack: 10A

(for measurements> 5A: duration <15 seconds,

interval >15 minutes)

Voltage drop: 200µA, 20mA and 2A ranges: 20mV

2000µA, 200mA and 10A ranges: 200mV

Frequency range: 40Hz – 400Hz

Response: Average, calibrated in rms of sine wave

Maximum voltage in open circuit must be ≤ 250V

DC current (with clamp, optional – EM420A, B)

Range Resolution Accuracy

meter 200A 0.1mV/0,1A ±(1,2%+5)

meter 1000A 1mV/1A ±(1,2%+5)

Produktspezifikationen

Marke:	EMOS
Kategorie:	Multimeter
Modell:	EM420B
Breite:	75 mm
Tiefe:	35 mm
Produkttyp:	Digitales Multimeter
Akku-/Batterietyp:	AAA
Höhe:	158 mm
Energiequelle:	Akku
Anzahl unterstützter Akkus/Batterien:	3
Akku-/Batteriespannung:	1.5 V
Akkus/Batterien enthalten:	Ja
DC Spannungsrange:	0.2 - 600 V
AC Spannungsrange:	2 - 600 V
Unterstützte Positionierung:	Hand-Multimeter