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

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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

HOW TO USE THE METER

PUSHBUTTONS

Pushbuttons

Items ~ describe how to use the pushbuttons.

POWER ON/OFF (DM-331, 332)

Press the power button to turn on the meter.

MANUAL RANGING (DM-333, 334)
Press RANGE to select the manual range mode, then the
"AUTO" annunciator is Disappear (the meter remains in
the range it was in when manual ranging was selected).
In the manual range mode, each time for press range
button, the range increments, and a new value is
displayed. To exit the manual range mode and turn to the
auto ranging, press and hold down range mode and turn
to the auto ranging, press and hold down range sw for
2 seconds the "AUTO" annunciator turns back on.

MIN/MAX(DM-331, 332, 334)
Press MIN/MAX button to enter MIN/MAX recording mode.
The MIN/MAX are then reset to the present input in the
MIN/MAX recording mode, the MIN/MAX are stored in
memory.
Push MIN/MAX button to cycle through the MIN/MAX and
present readings at normal record speed. Charges to the
voltage, current or resistance inputs that last at least
100 milliseconds are recorded.

HOLD(display hold)
Press hold sw to toggle in and out of the touch hold mode.
In the touch hold mode, the "HOLD" annunciator is displayed
and the last reading is hold on the display.
When a new stable reading is detected, the beeper emits
a tone, and the display is automatically undated.
In the MIN/MAX recording mode, press "HOLD" to stop the
recording of reading,
press "HOLD" to stop display, press "HOLD" again to start
it.(DM-331, 332, 334)

DC/AC (DM-332, 333, 334)
Press Push the switch to measure AC voltage or AC current
in the voltage or current mode.

7

HOW TO USE THE METER

PUSHBUTTONS

REL(relative reading) (DM-331)
Press REL to enter the relative mode, zero the display,
and store the displayed reading as a reference value.
The relative mode annunciator "REL" is displayed.
Press and hold down REL for 2 seconds to exit in the
relative mode, the value shown on the LCD is always the
difference between the stored reference value and the
present reading. for example, if the reference value is

15.00V and the present reading is 14.10V, the display will
indicate -0.90V. If the new reading is the same as the
reference value, the display will be zero.

(DM-333)
Press push button switch to measure or in the
mode.

* Auto Power off
The meter will automatically shut itself off after
approximately 30min(DM-331, 332, 334) and 10min
(DM-333) after power on.
The meter can be turned back on by pushing Hold key
switch (DM-331, 332, 334)and any key (DM-333).

8

Digital and Analog display

HOW TO USE THE METER

DIGITAL AND ANALOG DISPLAY

1) DIGITAL DISPLAY
Digital reading are displayed on a 4000 count or 3200
count display with polarity indication and automatic point
placement. When the meter is turned on, all display
segments and annunciators appear briefly during a
selftest.

2) ANALOG DISPLAY
The analog display provides an analog representation of
readings and updates 20 times per seconds but it doesn't
operate at the capacitance function and the frequency
count mode.

3) AUTO AUTO-RANGE (DM-333, 334)
The meter is the auto-range mode and will automatically
select range with the best resolution.
The meter powers on in auto-range mode.

4) NEGATIVE POLARITY
Automatically indicates negative inputs.
When REL is enabled, indicates negative requests of math
calculations.

5) BEEPER
continuity test is enabled.

6) REL RELATIVE MODE(DM-331)
The value displayed is the difference between the present
measurement and the previously stored reading.
Probe resistance compensation for resistance
measurements can be achieved by using this mode.

7) MIN/MAX MODE
MIN/MAX value in MIN/MAX recording mode.
The value displayed is the maximum or minimum reading
taken since the minimum and maximum recording mode
was entered.

9

APPLICATIONS

MEASURING VOLTAGE (AC/DC)

0.0000.000

APPLICATIONS

This section discusses some common applications for your
meter, and alerts you to some considerations to keep in
mind when taking measurement.

BB

RR

LL

EE

AA

DD

CC
KK

To measure voltage, connect the black lead to common
terminal and red one to v/ terminal, and turn the rotary
switch to DCV or ACV range as Figure 5-1.

Connect the meter in parallel with the load or circuit under
test.

Each of AC/DC voltage ranges presents an input impedance
of approximately 10 in parallel with less than 50 . AC

Measuring Voltage (AC/DC)

0.0000.000

voltage is AC-Coupled to the 10 input, and frequency
range is 50 to 400 (50~100 for 400 Range) and
50/60 for DM-333

BB

RR

LL

EE

AA

DD

CC
KK

Over range is being indicated by flickered figure "4" in display
(DM-331, 332, 334) and by character "OL" (DM-333)

Figure 5-1. Measuring Voltage

10

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

0.000

0.000

APPLICATIONS

MEASURING CURRENT (AC/DC)

Measuring Current (AC/DC)

If you do not know approximately what the current is,
connect the black lead to common terminal and red one to
10A input terminal first to see if you have a safe level for the

input (max. 400 ) terminal and turn the rotary switch to

DCA or ACA range as Figure 5-2.

RR
EE
DD

BB
LL
AA

CC
KK

Connect the meter in series with the load or circuit under test,
and note that the frequency range for AC current
measurement is 50 to 400 and 50/60 for DM-333

When measuring current, the meter's internal shunt resistors
develop a voltage across the meter's terminals called burden
voltage . This voltage drop is very low in your meter, but it
may affect precision circuits or measurements.

Over range is being indicated by flickered figure 4 in display.
(DM-331, 332, 334) and by character OL (DM-333)

Figure 5-2. Measuring Current

RR
EE
DD

BB
LL
AA

CC
KK

WARNING

DO NOT APPLY THE VOLTAGE OF MORE THAN
60V DC OR 30V AC RMS.

11

APPLICATIONS

MEASURING RESISTANCE

4.000

Measuring Resistance

To measure resistance, connect the black lead to common
terminal and red one to v/ terminal, and turn the rotary
switch to range as Figure 5-3. Connect the test leads
across the resistance under measurement.

RR
EE
DD

BB
LL
AA

CC
KK

CAUTION

Turn off power on the test circuit and discharge all
capacitors before attempting in-circuit resistance
measurements, If an external voltage is present across
a component, it will be impossible to take an accurate
measurement of the resistance of that component.

Figure 5-3. Measuring Resistance

Due to the sensitive nature of 400 Ohm(DM-331, DM-332, DM-334), 320 Ohm(DM-333) range, a residual resistance
is present. This resistance will display itself, if the probes are shorted. This residual resistance is due to the lead, track
and switch resistance. To obtain measurement within the stated accuracy when using the 400 Ohm(DM-331, DM-332,
DM-334), 320 Ohm(DM-333) range subtract from your value the residual resistance reading.

12

TRANSISTOR hFE TEST

Transistor hFE Test (DM-312, 341)

APPLICATIONS

0000

Figure 5-4.hFE Test

RR
EE
DD

BB
LL
AA

CC
KK

NOT USED

Set rotary function switch to hFE range as Figure 5-4. insert
the leads (Emitter, Base, Collector) into the proper holes of
the socket on the front panel, according to transistor type
NPN or PNP.

The display reads approximate eFE value at the test condition
of Base current 2 and VCE 3V.

13

APPLICATIONS

DIODE TEST

Diode Test

0.600

Figure 5-5. Diode Test

To perform a diode test, plug the black test lead to COM
terminal and the red one into v/ inputs, turn the rotary
switch to , and connect the test leads across the diode
under measurement as Figure 5-5.

RR
EE
DD

BB
LL
AA

CC
KK

The forward voltage drop is displayed in V unit and overload
(only, DM-333) or about 3.000V.

Test condition : Forward DC current (1 )
Reversed DC voltage (3.0V)

14

Continuity Test

APPLICATIONS

CONTINUITY TEST

0.600

Figure 5-6. Continuity Test

Continuity testing verifies that circuit connections are intact.
To perform audible continuity tests, Turn the rotary switch to
the position.

RR
EE
DD

BB
LL
AA

CC
KK

Connect the black test lead to COM input terminal and the
red one to v/ terminal, and the leads across the resistance
or circuit under measurement as Figure 5-6.

Test resistance below 40 (DM-331, 332, 334) or 20
(DM-333) cause the meter to emit a continuous tone.

CAUTION

Turn off power on the test circuit and discharge all
capacitors before attempting continuity testing.

15

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APPLICATIONS

BATTERY TEST

Battery Test (DM-331, 332)

0.600

Figure 5-7. Battery Test

To measure a battery, connect the black lead to common
terminal and red one to v/ terminal and turn the rotary
switch to BAT range as Figure 5-7. Connect the test leads
across the battery under measurement.

RR
EE
DD

BB
LL
AA

CC
KK

The kinds of AAM/AM/CM/DC batteries can be measured
on 1.5V BAT range, and FC-1006P, or LR-44 (button type)
on 9V BAT range.

16

0.000

RR
EE
DD

Figure 5-8. Measuring Frequency

APPLICATIONS

MEASURING FREQUENCY

Measuring Frequency (DM-332, 334)

In the frequency count mode, the frequency display auto­range to one of five range : 99.99 , 9.999 , 99.99 ,

999.9 for frequencies above 10 , the update rate slows
and follows the input signal. For frequencies below 1 , the

BB
LL
AA

CC
KK

display shows 0.000 for frequencies measurements.
Turn the rotary switch to the frequency range setting,
connect the meter to the signal being measured, connecting
the meter to the signal will normally allow the meter to auto­range to an appropriate range.
But the minimum input signal required to trigger the
frequency counter varies, depending on the range and
frequency.
If the input signal is below the trigger level, frequency
measurements will not be taken.
If your readings are unstable, the input signal may be near
the trigger level for that range.

17

APPLICATIONS

Items Contents Conditions

Effective

Number

upper 3 digits

-40.0 ~ 99.9

-400 ~ 999

99.9 Range

999 Range

Bar-graph

disappear

(Normal : disappear)

Push twice Hold Key

Digits

Varied and

over displayed (9.999)

Open the measurement

Points

MEASURING FREQUENCY

input sensitivity (RMS sinewave)

Freq. 10 ~ 40 ~ 300 ~ 1

Sensitivity 100 2V 4V 8V

(NOTE)

18

APPLICATIONS

MEASURING CAPACITANCE

Measuring Capacitance (DM-332)

0.000

RR
EE
DD

Figure 5-9. Measuring Capacitance

Turn off the power and discharge the capacitor before
attempting a capacitance measurement. For measuring
capacitor turn rotary switch to CAP and connect the test
leads to the capacitor.

BB
LL
AA

CC
KK

For capacitors less than 10 or in noisy environments,
use short test leads or a test fixture.

NOTE

Capacitor should be discharged before being tested.

When testing large capacitors, note that there will be a

certain time lag before displaying final indication.

The measurement value of capacitor subtract normal

reading value from measurement reading value.

19

APPLICATIONS

INNER BATTERY VOLTAGE CHECK (DM-333)

Inner Battery Voltage Check (DM-333)

3.000

RR
EE
DD

NOT USED

Figure 5-4.Inner Battery Voltage Check

BB
LL
AA

CC
KK

To check inner battery voltage, set rotary function switch to
CHK range like as Figure 5-10.
This display reads approximate inner battery voltage value.

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20

MAINTENANCE

CALIBRATION / REPLACEMENT

Calibration

Calibrate your meter once a year to ensure that it
performs according to its specifications. Contact the
nearest Distributor for calibration procedure.

Service

If the meter fails, check the battery and fuses and replace
as needed. If the meter still does not work properly review
this manual to make sure you are operation it correctly. If
the meter still malfunctions, pack it securely in its original
shipping container and forward it, postage paid, to the
EZD's distributor.
Include a description of the malfuction. EZD assumes no
responsibility for damage in transit.

A meter under warranty will be promptly repaired or
replaced (at EZD'S option) and returned at no charge.
If the warranty has laped, the meter will be repaired and
returned for a fixed fee. Contact the nearest EZD's
distributor for information and prices.

Battery Replacement (Figure 5-11)

After disconnecting test leads and turning off the

multimeter, Remove the one screw from the Battery cover.

Disconnect battery from instrument and replace with a

standard 1.5V battery.

Replace back cover and secure with one screws.

Fuse Replacement (Figure 5-11)

After disconnecting test leads and turning off the

multimeter, Remove back cover by removing three screws.

The fuse located with PCB board, remove old fuse and

replace with new fuse.

Replace back cover and secure with three screws.

CAUTION

For continued protection against fire, replace only with
FUSE of the specified voltage and current ratings.

21

MAINTENANCE

CALIBRATION / REPLACEMENT

Figure 5-10. Battery & Fuse Replacement

22

FUNCTION DM-331 DM-332

RANGE RESOLUTION ACCURACY RANGE RESOLUTION ACCURACY

400

4V

0.1

1

(0.5%+1dgt)

400

4V

0.1

1

(0.5%+1dgt)

40V

400V

10

100

(0.5%+1dgt)

400

4V

0.1

1

(0.5%+1dgt)

DC VOLTAGE

1000V 1V

(0.7%+2dgt)

1000V 1V

(0.7%+2dgt)

AC VOLTAGE

400

4V

40V

400V

750V

0.1

1

10

10

1V

(1.0%+3dgt)

400

4V

40V

400V

750V

0.1

1

10

10

1V

(1.0%+3dgt)

4

40

400

1

10

0.1

(1.5%+2dgt)

4

40

400

1

10

0.1

(1.5%+2dgt)

DC CURRENT

10A

10 (2.0%+5dgt)

10A

10 (2.0%+5dgt)

SPECIFICATIONS

DM-331, DM-332

Specifications

* Accuracy is ginven as (% of reading + number of least sanificant digits) at 18 to 28 with relative humidity up to
80% for a period of one year after calibraton.
* Sources like small hand-held radio transceivers, fixed station radio and television transmitters, vehicle radio transmitters
and cellular phones generate electromagnetic radiation that may induce voltages in the test leads of the multimeter.
In such cases the accuracy of the multimeter cannot be guaranteed due to physical reasons.

23

SPECIFICATIONS

DM-331 DM-332

FUNCTION

RANGE RESOLUTION ACCURACY RANGE RESOLUTION ACCURACY

4

40

400

1

10

0.1

(1.5%+ 3dgt)

4

40

400

1

10

0.1

(1.5%+ 3dgt)

AC CURRENT

10A

10 (2.0%+ 6dgt)

10A

10 (2.0%+ 6dgt)

400

4

40

400

1

1

10

100

(0. 7%+ 2dgt)

400

4

40

400

0.1

1

10

100

(0. 7%+ 2dgt)

4 1 (1.0%+ 2dgt) 4 1 (1.0%+ 2dgt)

RESISTANCE

40 10 (2.5%+2dgt) 40 10 (2.5%+ 2dgt)

CAPACITANCE - - -

40

40

4

40

10

100

1

10

(5.0%+ 4dgt)

DM-331, DM-332

Specifications

* Accuracy is ginven as (% of reading + number of least sanificant digits) at 18 to 28 with relative humidity up to
80% for a period of one year after calibraton.
* Sources like small hand-held radio transceivers, fixed station radio and television transmitters, vehicle radio transmitters
and cellular phones generate electromagnetic radiation that may induce voltages in the test leads of the multimeter.
In such cases the accuracy of the multimeter cannot be guaranteed due to physical reasons.

24

Specifications

DM-331 DM-332

FUNCTION

RAANGE RESOLUTION ACCURACY RAANGE RESOLUTION ACCURACY

FREQUENCY - - -

100

1

10

100

1

0.1

1

10

100

1

(0.3%+3dgt)

DIODE TEST

TEST VOLTAGE : 3V

MAXIMUM TEST CURRENT : 1

CONTINUITY

TEST

RANGE : 400

THRESHOLD : APPROX. 40

OR LESS

BATTERY

TEST

1.5V BATTERY SINK CURRENT : 110

9V BATTERY SINK CURRENT : 9

TRANSISTOR

TEST

BASE CURRENT : 2

VCE : APPROX. 3V

SPECIFICATIONS

DM-331, DM-332

* Accuracy is ginven as (% of reading + number of least sanificant digits) at 18 to 28 with relative humidity up to
80% for a period of one year after calibraton.
* Sources like small hand-held radio transceivers, fixed station radio and television transmitters, vehicle radio transmitters
and cellular phones generate electromagnetic radiation that may induce voltages in the test leads of the multimeter.
In such cases the accuracy of the multimeter cannot be guaranteed due to physical reasons.

25

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

SPECIFICATIONS

DM-333 DM-334

FUNCTION

RAANGE RESOLUTION ACCURACY RAANGE RESOLUTION ACCURACY

320

3.2V

0.1

1

(0.5%+2dgt)

400

4V

0.1

1

(0.5%+1dgt)

40V

400V

10

100

(0.5%+3dgt)

DC VOLTAGE

32V

320V

1000V

10

100

1V

(1.2%+4dgt)

1000V 1V

(0.7%+2dgt)

AC VOLTAGE

3.2V

32V

320V

750V

1

10

100

1V

(1.2%+4dgt)

400

4V

40V

400V

750V

0.1

1

10

100

1V

(1.0%+3dgt)

320 0.1 (1.0%+2dgt)

3200 1 (2.0%+2dgt)

32 10 (1.0%+2dgt)

320 0.1 (2.0%+2dgt)

40

400

10

0.1

(1.5%+2dgt)

DC CURRENT

10A

10 (2.5%+2dgt)

10A

10 (2.0%+5dgt)

DM-333, DM-334

Specifications

* Accuracy is ginven as (% of reading + number of least sanificant digits) at 18 to 28 with relative humidity up to
80% for a period of one year after calibraton.
* Sources like small hand-held radio transceivers, fixed station radio and television transmitters, vehicle radio transmitters
and cellular phones generate electromagnetic radiation that may induce voltages in the test leads of the multimeter.
In such cases the accuracy of the multimeter cannot be guaranteed due to physical reasons.

26

DM-333 DM-334

FUNCTION

RAANGE RESOLUTION ACCURACY RAANGE RESOLUTION ACCURACY

320

3200

32

320

0.1

1

10

0.1

(2.0%+5dgt)

40

400

10

0.1

(1.5%+3dgt)

AC CURRENT

10A

10 (2.5%+5dgt)

10A

10 (2.0%+6dgt)

320

3.2

32

320

0.1

1

10

100

(1.0%+2dgt)

400

4

40

400

0.1

1

10

100

(0.7%+2dgt)

4 1 (1.0%+2dgt)

RESISTANCE

3.2

32

1

10

(3.5%+5dgt)

40 10 (2.5%+2dgt)

Specifications

SPECIFICATIONS

DM-333, DM-334

* Accuracy is ginven as (% of reading + number of least sanificant digits) at 18 to 28 with relative humidity up to
80% for a period of one year after calibraton.
* Sources like small hand-held radio transceivers, fixed station radio and television transmitters, vehicle radio transmitters
and cellular phones generate electromagnetic radiation that may induce voltages in the test leads of the multimeter.
In such cases the accuracy of the multimeter cannot be guaranteed due to physical reasons.

27

DM-333 DM-334

FUNCTION

RAANGE RESOLUTION ACCURACY RAANGE RESOLUTION ACCURACY

FREQUENCY - - -

100

1

10

100

1

0.1

1

10

100

1

(2.5%+2dgt)

DIODE TEST

TEST VOLTAGE : 3V

MAXIMUM TEST CURRENT : 1

CONTINUITY

TEST

RANGE : 320

THRESHOLD : APPROX. 20 or LESS

RANGE : 400

THRESHOLD : APPROX. 40 or LESS

SPECIFICATIONS

DM-333, DM-334

Specifications

* Accuracy is ginven as (% of reading + number of least sanificant digits) at 18 to 28 with relative humidity up to
80% for a period of one year after calibraton.
* Sources like small hand-held radio transceivers, fixed station radio and television transmitters, vehicle radio transmitters
and cellular phones generate electromagnetic radiation that may induce voltages in the test leads of the multimeter.
In such cases the accuracy of the multimeter cannot be guaranteed due to physical reasons.

28

29

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

30