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EZ Digital DM-330SRS Operation Manual

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Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176 - FAX 781.665.0780 - TestEquipmentDepot.com

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Summary of Contents for EZ Digital DM-330SRS

  • Page 1 Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176 - FAX 781.665.0780 - TestEquipmentDepot.com...
  • Page 3 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...

  • Page 4: Table Of Contents

    CONTENTS TITLE PAGE INTRODUCTION -- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1 MULTIMETER SAFETY- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2 FEATURES - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 4 HOW TO USE THE METER - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5...
  • Page 5 CONTENTS, continued TITLE PAGE Me as ur in g Cu rr en t (A C/ DC ) - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -11 Me as ur in g Re si st an ce - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1 2 Tra ns is to r hF E Test - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1 3 Di od e Test - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 14...

  • Page 6: Introduction

    READ "MELTIMETER SAFETY" BEFORE USING THE NOTE METER. All material in this manual applies to the DM-330SRS unless otherwise indicated. Your EAD Digital Multimeter (also referred to as the meter ) is a handheld instrument that is designed for use in the field, This meter has been designed and tested according to laboratory and at home.

  • Page 7: Multimeter Safety

    MULTIMETER SAFETY MULTIMETER SAFETY SAFETY DESIGNED Before using the meter, read the following safety This meter has the feature that warns the dangerous information carefully. In the manual the word mismatching between rotary switch's mode selection "WARNING" is used for conditions and actions that position and jack terminal used, Buzzer sound if rotary pose hazards to the user, the word "CAUTION"...
  • Page 8 MULTIMETER SAFETY 0.000 00.00 0.000 (mismatching) (Good) (mismatching) Figure 2 * Using Effect (A):No plug in 10A JACK terminal.(Range selector : except 10A position) (B):Performance good Measurement. (C): Buzzer sound.

  • Page 9: Features

    FEATURES FEATURES Disconnect the live test lead (Red) before disconnecting the common test lead (Black). 3 Digit 4000 count LCD(DM-331, DM-332,DM-334) 3200 count LCD(DM-333) Follow all safety procedures for equipment being Measurement rate Digital : 2 times/sec tested. Disconnect the input power and discharge Capacitance : 1 times/sec all high voltage capacitors through a protective Different colors of input terminals...

  • Page 10: How To Use The Meter

    HOW TO USE THE METER INPUT TERMINALS HOW TO USE THE METER SOCKET Transistor hFE input terminal This section describes your meter and how to use it, For Function Selector Rotary Switch ease of reference, each description is numbered and keyed the illustration in page 29, 30 of this manual.
  • Page 11 HOW TO USE THE METER INPUT TERMINALS AND LIMITS Table 1. Input Terminals and Limits(DM-310SRS) INPUT MIN DISPLAY MAX DISPLAY TERMINALS READING READING MAXIMUM FUNCTION INPUT DM-331 DM-331 BLACK DM-333 DM-333 332,334 332, 334 1000V 1000V 1000VDC,750VAC 0.01A 0.01A 10.00A 10.00A 10A/250V 399.9...

  • Page 12: Pushbuttons

    HOW TO USE THE METER PUSHBUTTONS Pushbuttons HOLD(display hold) Press hold sw to toggle in and out of the touch hold mode. Items describe how to use the pushbuttons. In the touch hold mode, the "HOLD" annunciator is displayed and the last reading is hold on the display. POWER ON/OFF (DM-331, 332) When a new stable reading is detected, the beeper emits Press the power button to turn on the meter.
  • Page 13 HOW TO USE THE METER PUSHBUTTONS REL(relative reading) (DM-331) (DM-333) Press push button switch to measure in the Press REL to enter the relative mode, zero the display, mode. and store the displayed reading as a reference value. The relative mode annunciator "REL" is displayed. * Auto Power off Press and hold down REL for 2 seconds to exit in the The meter will automatically shut itself off after...

  • Page 14: Digital Display

    HOW TO USE THE METER DIGITAL AND ANALOG DISPLAY Digital and Analog display 1) DIGITAL DISPLAY NEGATIVE POLARITY Digital reading are displayed on a 4000 count or 3200 Automatically indicates negative inputs. count display with polarity indication and automatic point When REL is enabled, indicates negative requests of math placement.
  • Page 15 APPLICATIONS MEASURING VOLTAGE (AC/DC) APPLICATIONS This section discusses some common applications for your 0.000 0.000 meter, and alerts you to some considerations to keep in mind when taking measurement. Measuring Voltage (AC/DC) 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.

  • Page 16: Applications

    APPLICATIONS MEASURING CURRENT (AC/DC) Measuring Current (AC/DC) If you do not know approximately what the current is, 0.000 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.

  • Page 17: Me As Ur In G Re Si St An

    APPLICATIONS MEASURING RESISTANCE Measuring Resistance To measure resistance, connect the black lead to common 4.000 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. CAUTION Turn off power on the test circuit and discharge all capacitors before attempting in-circuit resistance...

  • Page 18: Transistor Hfe Test

    APPLICATIONS TRANSISTOR hFE TEST Transistor hFE Test (DM-312, 341) 0000 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.

  • Page 19: Diode Test

    APPLICATIONS DIODE TEST Diode Test 0.600 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.

  • Page 20: Co Nt In Ui Ty Tes

    APPLICATIONS CONTINUITY TEST Continuity Test 0.600 Continuity testing verifies that circuit connections are intact. To perform audible continuity tests, Turn the rotary switch to position. 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.

  • Page 21: Battery Test

    APPLICATIONS BATTERY TEST Battery Test (DM-331, 332) 0.600 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.

  • Page 22: Me As Ur In G Fr Eq Ue Nc

    APPLICATIONS MEASURING FREQUENCY Measuring Frequency (DM-332, 334) In the frequency count mode, the frequency display auto- 0.000 range 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.
  • Page 23 APPLICATIONS MEASURING FREQUENCY input sensitivity (RMS sinewave) (NOTE) Items Contents Conditions Freq. ~ 40 ~ 300 upper 3 digits 99.9 Range Effective Sensitivity -40.0 ~ 99.9 Range Number -400 ~ 999 disappear Bar-graph Push twice Hold Key (Normal : disappear) Varied and Open the measurement Digits...

  • Page 24: Measuring Capacitance

    APPLICATIONS MEASURING CAPACITANCE Measuring Capacitance (DM-332) Turn off the power and discharge the capacitor before 0.000 attempting a capacitance measurement. For measuring capacitor turn rotary switch to CAP and connect the test leads to the capacitor. For capacitors less than 10 or in noisy environments, use short test leads or a test fixture.

  • Page 25: In Ne R Ba Tt Er Y Vol Ta Ge C He

    APPLICATIONS INNER BATTERY VOLTAGE CHECK (DM-333) Inner Battery Voltage Check (DM-333) 3.000 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. NOT USED Figure 5-4.Inner Battery Voltage Check Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176 - FAX 781.665.0780 - TestEquipmentDepot.com...

  • Page 26: Maintenance

    MAINTENANCE CALIBRATION / REPLACEMENT Calibration Battery Replacement (Figure 5-11) Calibrate your meter once a year to ensure that it After disconnecting test leads and turning off the performs according to its specifications. Contact the multimeter, Remove the one screw from the Battery cover. nearest Distributor for calibration procedure.
  • Page 27 MAINTENANCE CALIBRATION / REPLACEMENT Figure 5-10. Battery & Fuse Replacement...

  • Page 28: Specifications

    SPECIFICATIONS DM-331, DM-332 Specifications F U N C T I O N D M -3 3 1 D M -3 3 2 R A N G E R E S O L U T I O N A C C U R A C Y R A N G E R E S O L U T I O N A C C U R A C Y...

  • Page 29: Specifications

    SPECIFICATIONS DM-331, DM-332 Specifications D M - 3 3 1 D M - 3 3 2 F U N C T IO N R A N G E R E S O L U T I O N A C C U R A C Y R A N G E R E S O L U T I O N A C C U R A C Y...
  • Page 30 SPECIFICATIONS DM-331, DM-332 Specifications D M -3 3 1 D M -3 3 2 F U N C T I O N R A A N G E R E S O L U T I O N A C C U R A C Y R A A N G E R E S O L U T I O N A C C U R A C Y...
  • Page 31 SPECIFICATIONS DM-333, DM-334 Specifications D M - 3 3 3 D M - 3 3 4 F U N C T IO N R A A N G E R E S O L U T I O N A C C U R A C Y R A A N G E R E S O L U T I O N A C C U R A C Y...
  • Page 32 SPECIFICATIONS DM-333, DM-334 Specifications DM-333 DM-334 FUNCTION RAANGE RESOLUTION ACCURACY RAANGE RESOLUTION ACCURACY 3200 (2.0%+5dgt) (1.5%+3dgt) AC CURRENT (2.5%+5dgt) (2.0%+6dgt) (1.0%+2dgt) (0.7%+2dgt) RESISTANCE (1.0%+2dgt) (3.5%+5dgt) (2.5%+2dgt) * 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.
  • Page 33 SPECIFICATIONS DM-333, DM-334 Specifications DM-333 DM-334 FUNCTION RAANGE RESOLUTION ACCURACY RAANGE RESOLUTION ACCURACY FREQUENCY (2.5%+2dgt) TEST VOLTAGE : 3V DIODE TEST MAXIMUM TEST CURRENT : 1 CONTINUITY RANGE : 320 RANGE : 400 TEST THRESHOLD : APPROX. 20 or LESS THRESHOLD : APPROX.
  • Page 35 Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176 - FAX 781.665.0780 - TestEquipmentDepot.com...

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