EZ Digital DM-330SRS Operation Manual

Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176 - FAX [phone] - TestEquipmentDepot.com

Before using the meter, you must read the following safety information of Maximum input

specification carefully.

V measurements : Below 1000VDC, 750VAC RMS
measurements : Below 500 (Fuse rating 250V)
10A measurements : Below 10A(Fuse rating 250V)

measurements : Below 600VAC/DC(1 minute)

measurements : Below 600VAC/DC(1 minute)

Capacitance measurements : Below 600VAC/DC
Hz measurements : Below 250VAC/DC

BAT : Don't input the any voltage, current but battery voltage.

If you don't follow the safety information, DMM SET may be damaged.

And, it can cause a roaring noise or a fire.

CONTENTS

TITLE PAGE

INTRODUCTION -- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1
MULTIMETER SAFETY- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2
FEATURES - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 4
HOW TO USE THE METER - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5
Input Terminals - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5
Function Selector Rotary Switch- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5
Pushbuttons - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 8
Digital display - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 9
APPLICATIONS - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -10
Measuring Voltage (AC/DC) - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -10

(continued on page ii)

CONTENTS, continued

TITLE PAGE

Meas urin g Curr ent (A C/DC ) - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -11
Meas urin g Resi stan ce - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 12
Tra nsis to r hF E Test - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1 3
Diod e Test - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -14
Cont inui ty Test - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -1 5
Batt ery Test - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 16
Meas urin g Freq uenc y - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -17
Meas urin g Capa cita nce- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 19
Inne r Batt ery Vol tage C heck - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2 0

MAIN TENA NCE - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 21
Cali brat ion/ R eplc emen t - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -21
Batt ery & Fu se Rep lcem ent - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 22

SPEC IFIC ATION S - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 23
Spec ific atio ns (DM -331 , 332) - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2 3
Spec ific atio ns (DM -333 , 334) - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2 6

INTRODUCTION

NOTE

All material in this manual applies to the DM-330SRS
unless otherwise indicated.

This meter has been designed and tested according to
EN 61010-1, Safety Requirements for Electronic
Measuring Apparaturs.

This manual contains information and warnings which
must be followed to ensure safe operation and retain the
meter in safe operation and retain the meter in safe
condition.

HOLSTER (Option)

The meter comes with a snap-on holster that absorbs
shocks and protects the meter from rough handling.
You can also hang the meter on your belt for easy viewing
while probing.
The test leads may be snapped into the holster that allows
you to hold both the meter and probe tip with one hand.

INTRODUCTION

WARNING

READ "MELTIMETER SAFETY" BEFORE USING THE
METER.

Your EAD Digital Multimeter (also referred to as the meter )
is a handheld instrument that is designed for use in the field,
laboratory and at home.
The meter combines the precision of a digital meter with the
speed and versatility of a high resolution.
The meter is powered by a 1.5Vx2 battery and has a rugged
case sealed against dirt, dust and moisture.
A snap-on holster protects the meter from rough handling.

After unpacking the meter, if you notice that the meter is
damaged or something is missing, contact the place of
purchase immediately. Save the shipping container and
packing material in case you have to reship the meter.

The higher input voltage than the maximum one can cause
the roaring noise by the spark gap included for protection.

1

MULTIMETER SAFETY

MULTIMETER SAFETY

Before using the meter, read the following safety
information carefully. In the manual the word
"WARNING" is used for conditions and actions that
pose hazards to the user, the word "CAUTION" is
used for conditions and actions that may damage
your meter.
The symbols shown in Figure 1 are used
internationally to denote the electrical functions
and conditions indicated.

Figure 1. international Electrical Symbols

SAFETY DESIGNED

This meter has the feature that warns the dangerous
mismatching between rotary switch's mode selection
position and jack terminal used, Buzzer sound if rotary
switch is not set to Amp mode (10A DC/AC) during
10A terminal which a detector is built in, pluged in by
test lead. To avoid accidentally applying voltage to
10A terminal, verify that red test lead is connected
to V input terminal before making voltage
measurement. This restriction ensures protection
against burns in the event that voltage is accidentally
applied between 10A and COM terminals.
v/ terminal is colored in red, COM terminal in black
and 10A terminal in Red to be recognized with easy
(refer to Fig.2).

Avoid working alone.

Inspect the test leads for damaged insulation

or exposed.

Select the proper function and range for your

measurement.

2

MULTIMETER SAFETY

0.000 00.00 0.000

(mismatching) (mismatching)(Good)

Figure 2

* Using Effect (A):No plug in 10A JACK terminal.(Range selector : except 10A position)
(B):Performance good Measurement.
(C): Buzzer sound.

3

FEATURES

Disconnect the live test lead (Red) before

disconnecting the common test lead (Black).

Follow all safety procedures for equipment being
tested. Disconnect the input power and discharge
all high voltage capacitors through a protective
impedance before testing in the and functions.

When making a current measurement, turn the
power off before connection the meter in the circuit.

Check the meter fused before measuring current
transformer secondary or motor winding current.
An open fuse may allow high voltage build-up, which
is potentially hazardous.

To take a measurement, use the test lead probes to
make the proper contacts. Remember, insert the meter
in the circuit in parallel for voltage and in series for
current measurements.

WARNING

TO AVOID ELECTRICAL SHOCK OR DAMAGE
TO THE METER, DO NOT APPLY MORE THAN
1000V BETWEEN COMTERMINAL AND EARTH
GROUND.
TO AVOID ELECTRICAL SHOCK, USE CAUTION
WHEN WORKING ABOVE 60V DC OR 30V AC

RMS, SUCH VOLTAGES POSE A SHOCK HAZARD.

FEATURES

3 Digit 4000 count LCD(DM-331, DM-332,DM-334)

3200 count LCD(DM-333)

Measurement rate Digital : 2 times/sec

Capacitance : 1 times/sec

Different colors of input terminals
Auto power About 30min(DM-331, DM-332, DM-334)

off About 10min(DM-333)

Low battery indication
Protection for input overload
Dual-slop integration A/D converter system.
Over range indication : Most-significant digit flickered

"OL" displayed (only, DM-333)

Battery life : Typical 500HRS with a regular battery

Temperatures
Operation : 0 ~ 40 (below 80% RH)
Storage : -10 ~ 60 (below 70% RH)
Guaranteed accuracy : 23 5

SAFETY
Certified by TUV Rheinland.

- EMC EMI : EN50081-1
EMS : EN50082-1

- Safety : EN61010-1

- Over voltage cat.

- pollution deg.

4

HOW TO USE THE METER

This section describes your meter and how to use it, For
ease of reference, each description is numbered and
keyed the illustration in page 29, 30 of this manual.

Input terminals

Item ~ describe the input terminals and the different
colors of input terminal allow you to have easy operation.
(See Table 1 for overload limits.)

HOW TO USE THE METER

INPUT TERMINALS

SOCKET Transistor hFE input terminal

Function Selector Rotary Switch

item describes functions that are selected by setting
the rotary switch. The meter is ready for normal operations
and will respond to the rotary switch and pushbuttons.

Volts AC Volts DC

10A Amperes Input Terminal
For current measurements (AC or DC) up to 10A
continuous when the function selector switch is in the
10A position.

COM Common Terminal (Black color)
Return terminal for all measurements.
Do not apply more than 1000V between The COM
terminal and Earth ground.

v/ Volts, Ohms, Continuity, Current(Ma), BAT,
Frequency, CAP, Diode test input Terminal (Red Color)

5

Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176 - FAX [phone] - TestEquipmentDepot.com

Amperes AC Amperes DC

Resistance Battery Test

Diode Test TR hFE Test

Beeper Sound Continuity Test

Capacitance
Test

Frequency
Test

HOW TO USE THE METER

INPUT

TERMINALS

MIN DISPLAY

READING

MAX DISPLAY

READING

FUNCTION

RED BLACK

DM-331

332,334

DM-333

DM-331

332, 334

DM-333

MAXIMUM

INPUT

V

V/

COM

0.1 0.1

1000V 1000V 1000VDC,750VAC

10A 10A COM 0.01A 0.01A 10.00A 10.00A 10A/250V

V/

COM

1 1 399.9 325.9 400 /250V

V/

COM

0.1 0.1 39.99 32.59

600VAC/DC(1min)

CAP

V/

COM

0.01

(DM-332)

-

39.99

(DM-332)

- 600VAC/DC(1min)

Hz

V/

COM

10Hz

(DM-332,334)

-

999.9

(DM-332,334)

- 250VAC/DC

BAT

V/

COM

0.001V

(DM-332,334)

-

39.99V

(DM-332,334)

-

Do not Apply any Voltage

or Current(only Battery)

V/

COM 600VAC/DC(1min)

INPUT TERMINALS AND LIMITS

Table 1. Input Terminals and Limits(DM-310SRS)

6