Dawson Tools DDM350 User Manual

Pen-Type Digital Multimeter

User’s Manual

DDM350

CONTENTS CONTENTS

Out of the Box................ .............................1

Accessories........................... ........ ...2.........

Safety Information...................... ................2

INTRODUCTION ............. .............. ... ........4.

Overview ................. .................. ...4.............

Buttons and Components ............ ...4............ .

Display Descrip tion........... ...6.......................

USING THE METER............. ........... ........7....

Preparation .......... ...7........................ ..........

DC/AC Voltage Meas urement........ ...7...........

DC/AC Current Measurement......... ...8..........

Resistance Measurement.......... ...9...............

Diode Test .......... ...9........................ ............

LIMITED WARRANTY AN D

LIMITATION OF LIABILITY. .... ...... .... ....... 1. ......

Safety Symbols ................................ ......3....

Certification......................... ....... ......4.........

Capacitance Mea surement. .10......................

Continuity.......... .10........................ .............

Frequency/Duty Cycle.......... .11....................

Data Hold . ...... ... ..12. ...................................

SPECIFICATIONS................ ........ ...... 13... ...

General Specification ......... .13.....................

Technical Specifi cation..............................14

MAINTENANCE AND REPAIR......... .......18...

Repair.......... ..18........................ ..................

Test Leads Replacem ent ........ ..18.................

Replacing the bat teries ........ .18....................

CONTACT DAWSON................... ..... .. ....19...

Backlight .......... .12........................ ..............

Work light.......... .12........................ ..............

NCV (Non-Contac t Voltage). ..12..... ...............

Auto Off. ......... ...12. .....................................

01 02

LIMITED WARRANTY AN D
LIMITATION OF LIABILITY

This i nstrume nt from Daw son Tools Inc. wi ll be free
from d efects in w orkmans hip and mat erial for t hree
year s from the da te of origi nal purch ase.Thi s warrant y
does n ot cover de fects res ulting fr om damage c aused
by the u ser such as d rops, neg lect, mis use,
unau thorize d alterat ion, usag e outside o f specifi ed
cond itions, c ontamin ation, or i mproper r epair/
main tenance .To receive s ervice on t he instru ment if it
beco mes neces sary duri ng the warr anty peri od,
cont act your ne arest Daw son autho rized ser vice cent er
at (80 0) 898-69 91 or visit w ww.Dawso nTools.co m to
obta in a return a uthoriz ation (wi thin the US o nly).
A retur n authori zation is n ecessar y before re turning
any in strumen t to Dawson ; no servic e will be pro vided
with out a retur n authori zation. The user is r esponsi ble
for pr operly pa cking the u nit and cha rges such a s
ship ping, fre ight and in surance c harges. The exten t of
Daws on's liab ility is li mited sol ely to the re pair/
repl acement o f the instr ument.T he above wa rranty in
its en tirety is i nclusiv e and no othe r warrant ies, writ ten
or ora l, are expr essed or im plied.

Out of the Box

Chec k the meter a nd access ories tho roughly b efore
usin g the meter. C ontact yo ur local di stribut or if the
mete r or any comp onents ar e damaged o r malfunc tion.

Accessories

Test Lea d

1.5V AA A Battery
Case

1
2
3
4

1 pcs
1 pcs
2 pcs
1 pcs

Safe ty Inform ation

To reduce t he risk of fi re, elect rical sho ck, produ ct
dama ge or perso nal injur y, pl ease foll ow the safe ty
inst ruction s describ ed in the use r ’s manua l. read
the ma nual befo re using th e meter.

Warning

To ensure s afe opera tion and li fe of the met er, do
not pl ace the met er in any env ironmen t with high
pres sure, hig h tempera ture, dus t, explos ive gas
or vap or.

Warning

1.Avoi d shaking , droppin g or any kind o f impacts w hen
usin g or transp orting th e meter.

2.To avo id electr ic shock or p ersonal i njury, repai rs or
serv icing not c overed in t his manua l should be
perf ormed onl y by qualif ied perso nnel.

3.Avoi d direct ex posure to s unlight t o ensure ex tended
life o f the meter.

4.Do n ot place me ter in a stro ng magnet ic field; t his may
caus e false rea dings.

5.Us e only the ba tteries i ndicate d in the Technica l Spec.

User ’s Manual

5

1 pcs

Alli gator Cli p & cable

Impo rtant saf ety infor mation, p lease
refe r to the user ’s manual

Eart h ground

Indi cates com pliance w ith requi rements
for do uble insu lation

03 04

6.Avoi d exposin g batteri es to humid ity. Replace batteries
as soo n as the low ba ttery ind icator ap pears.

7.Pl ease keep t he origin al packin g for futur e shippin g
purp oses (ex. C alibrat ion)

8.Af ter openi ng the box, c heck for an y damage du ring
deli very.

Safe ty Symbol s

Impo rtant Saf ety Infor mation

• Repa ir or maint enance sh ould be imp lemente d by
trai ned perso nnel only.

Certification

CAT I :Thi s meter has m et IEC101 0-1 stand ard with an

over voltage c ategory ( CAT III) and pollution degree of 2.
The me ter comp i es to EMC req uiremen ts.

II

l

Fuse m ust be repl aced with r atings
spec ified in th e manual.

Conf orms to IEC 1010-1 st andards f or
over voltage i n categor y III insta llation s
with a p ollutio n degree of I I.

Comp lies with E uropean U nion (EU)
stan dards

CE

CATIII

Comp lies with U .S. and Can adian saf ety
stan dards.

• Neve r use the met er to measu re voltag es that mig ht
exce ed 600V DC/ AC above ea rth groun d in catego ry
III in stallat ions.

• Alway s be carefu l when work ing with vo ltage abo ve
60V DC o r 30VAC RMS. Kee p fingers b ehind the p robe
barr iers whil e measuri ng.

• Insp ect test le ads and pro bes for cra cks, brea ks or
craz es on the ins ulation b efore usi ng the mete r.

Introduction

Over view

The DD M350 is a por table pen -type dig ital mult imeter
feat uring DC/ AC voltag e and curre nt measur ements,
resi stance, c apacita nce, cont inuity, diod e testing ,
freq uency and d uty cycle , auto/ma nual rang e, workli ght,
and an L CD w/back light for e asy readi ng. The slim an d
ligh tweight d esign is mo bile and id eal for bot h
prof essiona ls and hobb yists.

Figu res and Com ponents

Butt ons and Com ponents

1.Test P robe (+)

2.Pr obe Cap

3.NC V Indicat or

4.Pr otectiv e Ring

5.LC D Display

6.Ro tary Swit ch

7.FU NC (Funct ion) Butt on

8.RA N (Range) B utton

9. (Work l ight) But ton

10.N CV (Non-C ontact Vol tage) But ton

11.H/ (Ho ld/Back light) Bu tton

12.H z/% (Freq uency/D uty Cycle ) Button

13.C OM Jack (-)

03