Extech Instruments EX350 User Manual Download Page 4

EX35x

en

GB_V1.2

   

12/15

 

4

2.

 

Safety

 

Information

 

To

 

ensure

 

the

 

safe

 

operation

 

and

 

service

 

of

 

the

 

meter,

 

follow

 

these

 

instructions

 

closely.

 

Failure

 

to

 

observe

 

warnings

 

can

 

result

 

in

 

severe

 

injury.

 

 

WARNINGS

 

WARNINGS

 

identify

 

hazardous

 

conditions

 

and

 

actions

 

that

 

could

 

cause

 

BODILY

 

HARM

 

or

 

DEATH.

 

 

When

 

handling

 

test

 

leads

 

or

 

probes,

 

keep

 

hands

 

and

 

fingers

 

behind

 

the

 

finger

 

guards

 

at

 

all

 

times.

 

 

Remove

 

test

 

leads

 

from

 

the

 

meter

 

before

 

opening

 

the

 

battery

 

compartment

 

or

 

meter

 

housing.

 

 

Use

 

the

 

meter

 

only

 

as

 

specified

 

in

 

this

 

User

 

Guide

 

or

 

accompanying

 

Quick

 

Start

 

to

 

avoid

 

compromising

 

the

 

protections

 

provided

 

by

 

the

 

meter.

 

 

Be

 

sure

 

to

 

use

 

the

 

proper

 

terminals,

 

switch

 

positions,

 

and

 

ranges

 

when

 

taking

 

measurements.

 

 

Verify

 

the

 

meter’s

 

operation

 

by

 

measuring

 

a

 

known

 

voltage.

 

Have

 

the

 

meter

 

serviced

 

if

 

the

 

meter

 

responds

 

unusually

 

or

 

if

 

there

 

are

 

questions

 

regarding

 

the

 

meter’s

 

functional

 

integrity.

 

 

Do

 

not

 

apply

 

more

 

than

 

the

 

rated

 

voltage,

 

as

 

marked

 

on

 

the

 

meter,

 

between

 

terminals

 

or

 

between

 

any

 

terminal

 

and

 

earth

 

ground.

 

 

Replace

 

blown

 

fuses

 

with

 

fuses

 

of

 

the

 

same

 

type

 

and

 

rating

 

as

 

specified

 

in

 

this

 

User

 

Guide.

 

 

Use

 

caution

 

working

 

with

 

voltages

 

above

 

30

 

VAC

 

RMS,

 

42

 

VAC

 

peak,

 

or

 

60

 

VDC.

 

These

 

voltages

 

pose

 

a

 

shock

 

hazard.

 

 

To

 

avoid

 

misleading

 

readings

 

that

 

could

 

lead

 

to

 

electric

 

shock

 

and

 

injury,

 

replace

 

the

 

batteries

 

as

 

soon

 

as

 

the

 

low

 

battery

 

indicator

 

is

 

displayed.

 

 

Disconnect

 

power

 

to

 

the

 

circuit

 

under

 

test

 

and

 

discharge

 

all

 

high

voltage

 

capacitors

 

before

 

testing

 

resistance,

 

continuity,

 

diodes,

 

or

 

capacitance.

 

 

Do

 

not

 

use

 

the

 

meter

 

in

 

the

 

presence

 

of

 

explosive

 

gas

 

or

 

vapor.

 

 

To

 

reduce

 

risk

 

of

 

fire

 

or

 

electric

 

shock,

 

do

 

not

 

use

 

the

 

meter

 

if

 

it

 

is

 

wet

 

and

 

do

 

not

 

expose

 

the

 

meter

 

to

 

moisture.

 

 

Individual

 

protective

 

equipment

 

should

 

be

 

used

 

if

 

HAZARDOUS

 

LIVE

 

parts

 

in

 

the

 

installation

 

where

 

measurements

 

are

 

to

 

be

 

carried

 

out

 

could

 

be

 

accessible.

 

 

CAUTIONS

 

CAUTIONS

 

identify

 

conditions

 

and

 

actions

 

that

 

could

 

cause

 

DAMAGE

 

to

 

the

 

meter

 

or

 

equipment

 

under

 

test.

 

Do

 

not

 

expose

 

the

 

meter

 

to

 

extremes

 

in

 

temperature

 

or

 

high

 

humidity.

 

 

Disconnect

 

the

 

test

 

leads

 

from

 

the

 

test

 

points

 

before

 

changing

 

the

 

position

 

of

 

the

 

function

 

(rotary)

 

switch.

 

 

Do

 

not

 

expose

 

the

 

meter

 

to

 

extremes

 

in

 

temperature

 

or

 

to

 

high

 

humidity.

 

 

Never

 

set

 

the

 

meter

 

to

 

the

 

resistance,

 

diode,

 

capacitance,

 

or

 

amp

 

functions

 

when

 

measuring

 

the

 

voltage

 

of

 

a

 

power

 

supply

 

circuit;

 

this

 

could

 

result

 

in

 

meter

 

damage

 

and

 

damage

 

to

 

the

 

equipment

 

under

 

test.

 

Summary of Contents for EX350

Page 1: ...USER GUIDE True RMS Digital Multimeters EX350 Series EX350 True RMS Digital Multimeter EX355 True RMS Digital Multimeter with Temperature...

Page 2: ...s 10 10A AC DC Current Measurements 12 mA A AC DC Current Measurements 13 Non Contact Voltage Detector 14 Resistance Measurements 15 Continuity Measurements 16 Capacitance Measurements 16 Lo Z AC Volt...

Page 3: ...liable service Please visit our website www extech com to check for the latest version of this User Guide Product Updates Product Registration and Customer Support Features 6000 count EX355 or 4000 co...

Page 4: ...r Guide Use caution working with voltages above 30 VAC RMS 42 VAC peak or 60 VDC These voltages pose a shock hazard To avoid misleading readings that could lead to electric shock and injury replace th...

Page 5: ...s in which measures are taken to limit the transient over voltages to an appropriate low level Note Examples include protected electronic circuits OVERVOLTAGE CATEGORY II Equipment of OVERVOLTAGE CATE...

Page 6: ...on 4 Hz button 5 Mode and LPF Button 6 Rotary function select switch 7 10A input terminal 8 uA and mA input terminal 9 Common input terminal 10 Positive input terminal Voltage Resistance Capacitance T...

Page 7: ...o F Temperature units F Farads Capacitance measurement units Hz Hertz Frequency measurements unit Duty Cycle AC only Ohms Resistance measurement unit LPF Variable frequency voltage mode Battery status...

Page 8: ...AC DC TEMP EX355 C F Press and Hold LPF in the ACV function to select variable frequency tests Press R Range to switch from Auto to Manual Range Hold to return to Auto Range Press activates Relative m...

Page 9: ...r OFF after 15 minutes of inactivity To defeat this feature follow the steps below 1 With the meter OFF press and hold the M MODE button and while continuing to hold turn the rotary function switch to...

Page 10: ...r DC EX355 only 4 The meter defaults to the Auto Range mode Auto displayed on LCD Press the R button to access the manual range mode Press the R button to step through the ranges Press and hold the R...

Page 11: ...test Be sure to observe the correct polarity red lead to positive black lead to negative 6 The meter defaults to the Auto Range mode Auto displayed on LCD Press the R button to access the manual rang...

Page 12: ...s and Hold the R button to return to the Auto Range mode 5 Current measurements must be taken in series with the circuit under test See accompanying diagram 6 Touch the black test lead to the negative...

Page 13: ...ss the R button to manually range the meter Press the R button to step through the ranges Press and Hold the R button to return to the Auto Range mode 4 Press the M button to select AC or DC 5 Current...

Page 14: ...e meter does not emit a tone or flash the LED in this mode there is still the possibility that voltage is present Please use caution 1 Turn the function switch to the NCV position to access the Non Co...

Page 15: ...icon showing 4 The meter defaults to the Auto Range mode Auto displayed on LCD Press the R button to access the manual range mode Press the R button to step through the ranges Press and Hold the R bu...

Page 16: ...e Measurements WARNING To avoid electric shock remove power to the circuit under test and discharge the capacitor under test before measuring Do not test on circuits or devices where 60VDC or 30VAC is...

Page 17: ...proper decimal point and measurement type units symbols Variable Frequency Voltage Measurements When the function switch is turned to the LPF position the meter can measure voltage on signals with va...

Page 18: ...e LCD when in Diode test mode 3 Touch the test probe tips to the diode or semiconductor junction under test Note the meter reading 4 Reverse the test lead polarity by reversing the red and black leads...

Page 19: ...rving correct polarity 2 Turn the function switch to the Temp position Use the M button to select the desired unit of measure 3 Touch the temperature probe tip to the device under test or leave the te...

Page 20: ...active Subsequent readings will now be compared to the stored reference Displayed Reading Measurement minus Reference Press the REL button again to exit the Relative mode the Relative symbol will swit...

Page 21: ...y and store separately Fig 5 1 BATTERY AND FUSE REPLACEMENT Fuse Replacement The 600mA fuse can be replaced from the battery compartment 4 To replace the 10A fuse remove the four 4 screws that secure...

Page 22: ...0 2 5 Add 7 0 for C F 2 5 3 0 Function Range Resolution Accuracy DC Voltage EX350 EX355 40 00mV 60 00mV 10 V 0 7 5 digits 400 0mV 600 0mV 0 1mV 0 5 2 digits 4 000V 6 000V 1mV 0 5 3 digits 40 00V 60 00...

Page 23: ...y A EX350 EX355 400 0 A 600 0 A 0 1 A 1 0 3 digits 4000 A 6000 A 1 A mA 40 00mA 60 00mA 10 A 400 0mA 600 0mA 0 1mA A 4 000A 6 000A 1mA 1 2 3 digits 10 00A 10 00A 10mA ACA Frequency Response 45 400Hz F...

Page 24: ...quency for Voltage or Current functions Frequency 1kHz AC voltage input amplitude of mV range 100mV input amplitude of V range the range 6 AC current input amplitude a 4000 6000 A 400 600mA 10A range...

Page 25: ...C 86 to 104 F 50 RH maximum Storage Temperature and Humidity 10 to 50 C 14 to 122 F 80 RH maximum with battery removed Operating Altitude 2000m 6562 Battery power 2 AA batteries battery life 130 hours...

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