Extech Instruments EX350 User Manual Download Page 3

EX35x

en

GB_V1.2

   

12/15

 

3

1.

 

Introduction

 

Thank

 

you

 

for

 

selecting

 

the

 

Extech

 

EX350

 

Series

 

Meter.

   

 

The

 

EX350

 

Series

 

are

 

feature

packed

 

True

 

RMS

 

digital

 

multimeters.

 

In

 

addition

 

to

 

standard

 

DMM

 

features,

 

they

 

offer

 

a

 

Low

 

Impedance

 

(Lo

 

Z)

 

mode,

 

Backlit

 

LCD,

 

Non

Contact

 

Voltage

 

Detector

 

that

 

safely

 

senses

 

electrical

 

sources,

 

Variable

 

frequency

 

voltage

 

measurement,

 

and

 

Temperature

 

(EX355).

  

 

This

 

device

 

is

 

shipped

 

fully

 

tested

 

and

 

calibrated

 

and,

 

with

 

proper

 

use,

 

will

 

provide

 

years

 

of

 

reliable

 

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

 

count

 

(EX350)

 

digital

 

display

  

 

Large

 

backlit

 

LED

 

display

 

 

True

 

RMS

 

ACV

 

measurements

 

 

Variable

 

Frequency

 

Voltage

 

measurements

 

 

Lo

 

Z

 

mode

 

protects

 

readings

 

from

 

ghost

 

voltages

 

 

Auto

 

and

 

Manual

 

Range

 

modes

 

 

0.5%

 

DCV

 

accuracy

 

 

Auto

 

Power

 

OFF

 

(APO)

 

with

 

disable

 

function

 

 

Temperature

 

measurements

 

(Model

 

EX355

 

only)

 

with

 

included

 

temperature

 

probe

 

 

10A

 

AC/DC

 

current

 

measurements

 

 

Non

Contact

 

Voltage

 

Detector

 

 

Visual

 

and

 

audible

 

continuity

 

measurement

 

alert

 

 

Low

 

battery

 

indicator

  

 

CAT

 

III

 

600V

  

 
 
 

 

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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