EEVBlog 121GW Manuel utilisateur

USER'S MANUAL

121GW

MULTIMETER

Last Revised

11 December 2017

Last Revised: 11 December 2017 121GW User Manual

CONTENTS

Contact.............................................................................................................. 5

Glossary of Terms.............................................................................................. 6

Change log......................................................................................................... 7

General.............................................................................................................. 8

FCC/IC Information........................................................................................ 8

Information to the User ................................................................................ 8

Introduction ...................................................................................................... 9

Features .......................................................................................................... 10

Specifications .................................................................................................. 12

General........................................................................................................ 12

Voltage Measurement................................................................................. 14

Current Measurement................................................................................. 15

Resistance & Capacitance Measurement.................................................... 16

Diode Measurement.................................................................................... 16

Frequency & Duty Cycle Measurement ...................................................... 17

VA Measurement ........................................................................................ 17

Temperature & Continuity .......................................................................... 18

Bluetooth Specifications.............................................................................. 19

Standards ........................................................................................................ 20

Compliance Symbols ................................................................................... 20

IEC Standards............................................................................................... 20

ANSI Standards............................................................................................ 20

Safety .............................................................................................................. 20

Warning....................................................................................................... 21

Last Revised: 11 December 2017 121GW User Manual

Caution ........................................................................................................ 24

Operation........................................................................................................ 25

Measuring ....................................................................................................... 30

Voltage .............................................................................................. 30

Temperature ......................................................................................... 32

Current ......................................................................................... 34

Burden Voltage ........................................................................................ 36

Resistance ............................................................................................. 37

Continuity Testing ................................................................................ 38

Cable Break Testing ............................................................................. 39

Capacitance .......................................................................................... 40

Frequency ........................................................................................... 41

Duty Cycle ........................................................................................... 42

Period .................................................................................................. 43

Diode Measurement ............................................................................ 44

Power (VA) ................................................................... 46

Data Logging................................................................................................ 47

Backlight ...................................................................................................... 48

Bluetooth..................................................................................................... 48

Measurement HOLD.................................................................................... 49

Relative Measurement (REL)....................................................................... 50

MIN/MAX/AVG............................................................................................ 51

Setup Menu................................................................................................. 52

Last Revised: 11 December 2017 121GW User Manual

Temperature............................................................................................ 53

Battery Voltage........................................................................................ 53

Auto Power Off (APO).............................................................................. 53

LCD Contrast ............................................................................................ 54

Date.......................................................................................................... 54

Logging Interval ....................................................................................... 55

Maintenance ................................................................................................... 56

Debugging.................................................................................................... 56

Cleaning and Storage................................................................................... 56

Fuse Replacement ....................................................................................... 57

Calibration....................................................................................................... 58

Calibration Mode......................................................................................... 58

Zero Offset Calibration ................................................................................ 60

Full Scale GAIN Calibration.......................................................................... 61

Calibration Reference Table............................................................................ 62

Firmware Update ............................................................................................ 63

Warranty ......................................................................................................... 64

Last Revised: 11 December 2017 121GW User Manual

CONTACT

If you have a warranty claim, you can contact us at the following email ad-

dress:

[email protected]om

This multimeter and accessories can be purchased from:

www.eevblog.com

Community Support for the meter is provided on the EEVblog Forum:

www.eevblog.com/forum

Phone:

Ph: +61(2)86268743

Last Revised: 11 December 2017 121GW User Manual

GLOSSARY OF TERMS

IEC

(International Electrotechnical Commission)

An organisation that publishes various international standards relating to

electrical, electronics and related technology.

ANSI

(American National Standards Institute).

Americas non-profit standards organisation that oversee the development

and use of standards in various domains.

ETL

(ETL Testing Laboratories)

The compliance certification mark of Intertek Group in Europe.

(Overload Protection)

The voltage that a function of the Multimeter than withstand.

Accuracy

The closeness of a measured value to a known standard.

Low BurdenTM

Provides low burden voltage when measuring current compared with typical

multimeters, minimising impact on your in-circuit current measurements.

Last Revised: 11 December 2017 121GW User Manual

CHANGE LOG

The following represents the changes made to the manual:

Date

Description

11/12/17

Original Release

Last Revised: 11 December 2017 121GW User Manual

GENERAL

FCC/IC INFORMATION

This device complies with Part 15 of the FCC Rules and CAN ICES-3(A). Opera-

tion is subject to the following two conditions: (1) this device may not cause

harmful interference, and (2) this device must accept any interference re-

ceived, including interference that may cause undesired operations.

INFORMATION TO THE USER

This equipment has been tested and found to comply with the limits for a

Class B digital device, pursuant to part 15 of the FCC Rules. These limits are

designed to provide reasonable protection against harmful interference in a

residential installation.

This equipment generates, uses and can radiate radio frequency energy and,

if not installed and used in accordance with the instructions, may cause

harmful interference to radio communications. However, there is no guaran-

tee that interference will not occur in an installation.

If this equipment does cause harmful interference to radio or television re-

ception, which can be determined by turning the equipment off and on, the

user is encouraged to try to correct the interference by one or more of the

following measures:

•Reorient or relocate the receiving antenna.

•Increase the separation between the equipment and receiver.

•Connect the equipment into an outlet on a circuit different from that

to which the receiver is connected.

•Consult the dealer or an experienced radio/TV technician for help.

WARNING

Any changes or modifications not expressly approved by the manufacturer

could void the user’s authority to operate the equipment.

Last Revised: 11 December 2017 121GW User Manual

INTRODUCTION

Congratulations on purchasing the EEVblog 121GW multimeter. It's one of

the most feature packed small form factor meters on the market, designed to

provide maximum functionality in as little bench space as possible. It pro-

vides many unique features not found on other multimeters, like low burden

voltage measurement and display, simultaneous voltage and current (VA

power) measurement, 15 V diode test voltage, Bluetooth built-in, and Micro

SD card data logging.

You've made a wise choice buying this instead of some questionable quality

cheapie, it should return the favour with many years of safe and accurate ser-

vice.

That ETL logo you see stamped on the back of the meter ensures that the me-

ter design has been independently tested to the latest IEC/UL/EN61010-1 3rd

edition safety standard by Intertek.

With a genuine 600 V CAT III rating and proper 1000V HRC fuses and

MOV+PTC protection you can feel confident and safe that you can use this

meter on most high energy mains rated equipment.

And remember, don't turn it on, take it apart!

This meter is hackable, go for it.

Have fun.

Dave Jones

www.eevblog.com

Last Revised: 11 December 2017 121GW User Manual

FEATURES

Summary

•True RMS sensing up to crest factor 10 (AD8436 chipset)

•600 V CAT III ETL Listed Rating

•1000 V HRC fuses

•High voltage 15V diode test mode

•Dual 50,000 count display

•Relative Mode

•1ms Peak Capture

•MIN, MAX or AVG on all functions

•Low BurdenTM current measurement feature

•OPEN and CLOSED continuity testing (for wire breaks)

•Temperature, Capacitance, Frequency and Duty Cycle

•Unique burden voltage measurement & display in current mode

•Simultaneous voltage and current measurement and VA calculation

•Low Z input mode eliminates ghost voltages

•Automatic touch measurement data hold

•Audible and visual incorrect input jack warning

•Closed case calibration of individual ranges

Logging Capabilities

•Bluetooth LE (Low Energy) Communication

•Data logging onto a Micro SD card (CSV format)

Mechanical

•Compact size

•Backlit display

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