EXTECH EX300 Series Digital Multimeters User Guide

: June 13, 2024
: EXTECH

Table of Contents

EXTECH EX300 Series Digital Multimeters
Pick the right Multimeter for your application
SPECIFICATIONS
EX350 Series True RMS Multimeters with LPF and LoZ
EX360 Series CAT IV True RMS Multimeters + NCV + LoZ
ORDERING
EX400A Series Professional Multimeters
EX505-K Heavy Duty Industrial Multimeter Kit
Multimeter Features
DM220 CAT IV Pocket Multimeter + NCV
MN35/MN36 Digital Mini Multimeters
References
Read User Manual Online (PDF format)
Download This Manual (PDF format)

EXTECH EX300 Series Digital Multimeters

Pick the right Multimeter for your application

EXTECH-EX300-Series-Digital-Multimeters-fig-1 MN Series
Compact and affordable Digital Multimeters with choice of Manual Ranging or Autoranging models. Perfect for DIYers, students, hobbyists, mechanics and technicians.

EX300 Series
Mini Digital DMMs with built-in Non-Contact Voltage Detector and numerous electrical functions and temperature.

EX350 Series
These professional True RMS DMMs are loaded with advanced features and functions. Low Impedance (LoZ) mode eliminates false readings caused by ghost voltages. Low Pass Filter (LPF) attenuates high frequencies to reduce noise for accurate readings.

EX360 Series
Professional CAT IV True RMS Multimeters designed for Electrical, HVAC, or Industrial Applications. Advanced LoZ feature eliminates false readings caused by ghost voltages.CAT IV safety rating ensures the highest level of protection.

EX400A Series
Professional Full Size Series Digital Multimeters. Features include Large Digits, True RMS or Averaging, and Type K and/or built-in IR Thermometer.

EX500 Series
Industrial Series Digital DMMs are accurate and rugged. Waterproof, dustproof, drop tested to 2 m (6.5’), and CAT IV safety rated for higher voltage applications. Wireless datalogging model or built-in IR Thermometer.

MG320 Series
Combines a 1000 V Insulation Resistance Tester with Resistance range up to 200 GΩ and a fully-loaded True RMS CAT IV Digital Multimeter.

Look for this symbol: (N) indicating products that are available with optional calibration traceable to NIST. See complete listing on p. 146-167.

EX300 Series Mini Digital Multimeters + Voltage Detector

Combination Multimeter with non-contact AC Voltage Detector

Built-in non-contact AC Voltage Detector with red LED indicator and audible beeper
Large 1″ digits makes display easy to read
CAT III-600 V, CAT II-1000 V safety rating
2-year warranty
Complete with stand, test leads, protective holster, batteries, general purpose Type K bead wire temperature probe (EX330 only)

Model EX310 (Manual Ranging)

Battery test 1.5 V and 9 V

Model EX330 (Autoranging)

Data Hold and Auto Power Off
Advanced functions include Type K Temperature, Capacitance, and Frequency

SPECIFICATIONS

SPECIFICATIONS EX310 (MANUAL RANGING) EX330 (AUTORANGING)

Display Count 2000 4000
Basic Accuracy 0.50% 0.50%
NCV Detector 100 to 600 V AC 100 to 600 VAC
DC Voltage 0.1 mV to 600 V 0.1 mV to 600 V
AC Voltage 0.1 V to 600 V 0.1 mV to 600 V
DC/AC Current 0.1 mA to 10 A 0.1 μA to 10 A
Resistance 0.1 Ω to 2000 kΩ 0.1 Ω to 40 MΩ
Capacitance — 0.001 nF to 200 μF
Frequency — 0.001 Hz to 10 MHz
Temperature — -4 to 1382°F (-20 to 750°C)
Duty Cycle — 0.1 to 99.9%
Diode/Continuity Yes Yes
Dimensions 5.7×2.9×1.6″ (147x76x42 mm) 5.7×2.9×1.6″ (147x76x42 mm)
Weight 9 oz (260 g) 9 oz (260 g)

Integrated Non-Contact Voltage Detector for quickly checking the presence of live wires before testing.

ORDERING

EX310 (N) Manual Ranging 9 Function Mini Multimeter + Non-Contact Voltage Detector
EX330 (N) Autoranging 12 Function Mini Multimeter + Non-Contact Voltage Detector
409996 Vinyl soft case
TP873 Replacement Bead wire Temperature Probe (-22 to 572°F/-30 to 300°C)
TL803 Replacement Test Leads

Indicates products that are available with optional calibration traceable to NIST. See pages 146-147 for a complete listing.

EX350 Series True RMS Multimeters with LPF and LoZ

Professional meters loaded with advanced features and functions including Low Pass Filter (LPF) and Low Impedance (LoZ)

True RMS for accurate AC measurements
0.5% basic accuracy
Low Pass Filter (LPF) for accurate measurement of variable frequency drive signals
LoZ prevents false readings caused by ghost voltages
Built-in Non-Contact AC Voltage Detector (NCV) with LED indicator
Data Hold freezes the reading on the display
Min/Max/Max-Min captures highest and lowest readings and the difference between them
Relative Mode for Capacitance Zero and offset adjustment
Continuity and Diode Test
Auto Power Off conserves battery life
CAT III-600 V safety rating
3-year warranty

Model EX350

4000 count backlit LCD display
Complete with test leads and two AA batteries

Model EX355

6000 count backlit LCD display
Type K Temperature
Complete with test leads, two AA batteries, and general purpose bead wire temperature probe

SPECIFICATIONS EX350 EX355

Display Count 4000 6000
Basic DCV Accuracy ±0.5% ±0.5%
NCV Detector Yes Yes
DC/AC Voltage 0.01 mV to 600 V 0.01 mV to 600 V
DC/AC Current 0.1 μA to 10.00 A 0.1 μA to 10.00 A
Resistance 0.1 Ω to 40.00 MΩ 0.1 Ω to 60.00 MΩ
Capacitance 1 pF to 60.00 mF 1 pF to 60.00 mF
Frequency 0.001 Hz to 10 MHz 0.001 Hz to 10 MHz
Temperature (Type K) — -40 to 1832°F (-40 to 1000°C)
Duty Cycle 0.1 to 99.9% 0.1 to 99.9%
Diode Test 3.2 V 3.2 V
Continuity Audible Audible
Dimensions/ Weight 6.7×3.2×1.9″ (175x81x48.5 mm)/13.1 oz (370 g)
Low Pass Filter (LPF) ensures accurate AC Voltage measurements on a variable frequency drive.

ORDERING

EX350 (N) True RMS Multimeter + NCV
EX355 (N) True RMS Multimeter + NCV + Temperature
TL810 Electrical Test Lead Kit
TL803 Standard Test Leads
TP200 Type K Clamp Probe (212°F/100°C)

Verify Temperature output on HVAC units using Model EX355

Calibration Traceable to NIST
A NIST traceable certificate with data is available when you order your meter with Certificate Traceable to NIST. Look for this symbol (N) next to product part numbers.

EX360 Series CAT IV True RMS Multimeters + NCV + LoZ

EXTECH-EX300-Series-Digital-Multimeters-fig-8

Includes test leads, 9 V battery, holster with tilt stand and built-in magnet, and general purpose bead wire temperature probe (Model EX363)

Choose a CAT IV-600 V multimeter designed for Electrical, HVAC, or Industrial Applications with LoZ function for accurate Voltage readings

True RMS for accurate AC measurements
LoZ prevents false readings caused by ghost voltages
Built-in Non-contact AC Voltage Detector (NCV) with LED indicator
Smart Data Hold freezes the displayed reading and automatically updates the reading and alerts user (audibly and visually) if the measurement changes ±50 counts
Large white LED backlit display with 60-segment analog bargraph for viewing trends
Peak Hold captures the highest reading
Relative Mode for Capacitance Zero and offset adjustment
Continuity beeper with visual alert; Auto Power off with disable
CAT IV-600 V safety rating
2-year warranty

Model EX360 — for Electrical applications

Frequency and Capacitance measurement

Model EX363 — for HVAC applications

μA function for HVAC flame rod measurements
Type K Temperature
Frequency and Capacitance measurement

Model EX365 — for Industrial/Commercial applications

10 A AC/DC Current measurement with 11 A/1000 V high energy fuse
Frequency and Capacitance measurement

SPECIFICATIONS EX360 EX363 EX365

Display Count 6000 6000 6000
Basic Accuracy (DCV) 0.5% 0.5% 0.5%
NCV Detector Yes Yes Yes
DC/AC Voltage 0.1 mV to 1000 V 0.1 mV to 1000 V 0.1 mV to 1000 V
DC/AC Current — — 1 mA to 10 A
DC/AC μA Current — 600 μA —
Resistance 0.1 Ω to 40 MΩ 0.1 Ω to 40 MΩ 0.1 Ω to 40 MΩ
Capacitance 1 nF to 10 mF 1 nF to 10 mF 1 nF to 10 mF
Frequency 0.01 Hz to 100 kHz 0.01 Hz to 100 kHz 0.01 Hz to 100 kHz
Temperature (Type K) — -40 to 742°F (-40 to 394°C) —
Diode Test/Continuity Yes Yes Yes
Dimensions/ Weight 6.5×3.2×1.7″ (164x82x44 mm)/5.9 oz (450 g)

ORDERING

EX360 (N) Electrical CAT IV True RMS Multimeter + NCV
EX363 (N) HVAC CAT IV True RMS Multimeter + NCV
EX365 (N) Industrial CAT IV True RMS Multimeter + NCV

EXTECH-EX300-Series-Digital-Multimeters-fig-9

EX400A Series Professional Multimeters

EXTECH-EX300-Series-Digital-Multimeters-fig-10

Models with or without the built-in Infrared Thermometer, auto or manual ranging, True RMS or averaging

Large backlit LCD display with easy-to-read 1″ digits
Type K thermometer built-in for temperature measurements
Low current capability: measure down to 0.1 μA
Input fuse protection and mis-connection warnings
CAT III-600 V safety rating
Complete with CAT III test leads, multi-position tilt stand and velcro strap for hanging, protective holster with test lead holder, bead wire temperature probe, and 9 V battery

Model EX410A (Manual Ranging)

Averaging multimeter
2-year warranty

Model EX430A (Autoranging)

True RMS for accurate AC measurements
Relative function
3-year warranty

Model EX470A (Autoranging)

Built-in non-contact Infrared (IR) Thermometer
True RMS for accurate AC measurements
Relative function
3-year warranty

SPECIFICATIONS EX410A EX430A EX470A

Display Count 2000 4000 4000
Temperature (IR) — — 58 to 518°F (-50 to 270°C)
Averaging/True RMS Averaging True RMS True RMS
Basic Accuracy (VDC) ±0.5% ±0.3% ±0.3%
AC Voltage 1 mV to 600 V 0.1 mV to 600 V 0.1 mV to 600 V
DC Voltage 0.1 mV to 600 V 0.1 mV to 600 V 0.1 mV to 600 V
AC Current 0.1 μA to 10 A 0.1 μA to 10 A 0.1 μA to 10 A
DC Current 0.1 μA to 10 A 0.1 μA to 10 A 0.1 μA to 10 A
Resistance 0.1 Ω to 20 MΩ 0.1 Ω to 40 MΩ 0.1 Ω to 40 MΩ
Capacitance — 0.01nF to 100μF 0.01 nF to 100 μF
Frequency — 0.001 Hz to 10 MHz 0.001 Hz to 10 MHz
Temperature (Type K) -4 to 1382°F (-20 to 750°C) -4 to 1382°F (-20 to 750°C) -4 to 1382°F (-20 to 750°C)
Duty Cycle — 0.1% to 99.9% 0.1% to 99.9%
Diode Test/Continuity Yes Yes Yes
Dimensions/ Weight 7.4×3.2×2″ (187x81x50 mm)/0.75 lbs (342 g)

Built-in non-contact IR Thermometer allows you to safely perform non-contact temperature scans.

ORDERING

EX410A (N) Manual Ranging Multimeter
EX430A (N) True RMS Autoranging Multimeter
EX470A (N) True RMS Autoranging Multimeter + IR Thermometer
TL810 Electrical Test Lead Kit
TL803 Standard Test Leads
TP200 Type K Clamp Probe (212°F/100°C)
HG500 Magnetic Hanging Strap

Extech-exclusive Meters with Built-in IR Thermometer!
Our innovative design incorporates a built-in IR Thermometer. Look for the built-in IR Thermometer logo throughout this catalog.

EXTECH-EX300-Series-Digital-Multimeters-fig-12

EX500 CAT IV Heavy Duty True RMS Multimeters

EXTECH-EX300-Series-Digital-Multimeters-fig-13

Complete with double molded test leads, magnetic hanging strap, general purpose Type K bead wire temperature probe, soft case, and one 9 V battery

Waterproof (IP67)/drop proof (6.5 ft/2 m) rugged design for heavy duty use

True RMS for accurate AC measurements
1000 V input protection on all functions
Dual sensitivity frequency functions; Diode open circuit voltage of 2.8 V DC
Auto Power Off with disable feature
CAT IV-600 V safety rating
3-year warranty

Model EX505

4,000 count backlit LCD
0.5% basic accuracy
Data Hold, Relative, and 10 A max Current

Model EX520

6000 count—high resolution backlit LCD
0.09% basic accuracy
Min/Max, Data Hold, Relative, and 20 A max Current

Model EX530

40,000 count—highest resolution backlit LCD
0.06% basic accuracy
Min/Max, Data Hold, Relative, 20 A max Current, and Peak Hold (AC only)

Waterproof (IP67) rugged double molded design for heavy duty application use

SPECIFICATIONS EX505 EX520 EX530

Basic Accuracy ±0.5% ±0.09% ±0.06%
DC Voltage 0.1 mV to 1000 V DC 0.1 mV to 1000 V DC 0.01 mV to 1000 V DC
AC Voltage 0.1 mV to 1000 V AC 1 mV to 1000 V AC 0.01 mV to 1000 V AC
DC/AC Current 0.1 μA to 10 A 0.1 μA to 20 A 0.01 μA to 20 A
Resistance 0.1 Ω to 40 MΩ 0.1 Ω to 40 MΩ 0.01 Ω to 40 MΩ
Capacitance 0.01 nF to 100 μF 0.01 nF to 1000 μF 0.001 nF to 40 mF
Frequency (electrical) 5 Hz to 1 kHz 10 Hz to 400 Hz 40 Hz to 400 Hz
Frequency (electronic) 0.001 Hz to 10 MHz 0.001 Hz to 40 MHz 0.001 Hz to 100 MHz
Temperature (Type K) -4 to 1382°F/-20 to 750°C -4 to 1382°F/-20 to 750°C -4 to 1382°F/-20 to 750°C
Duty Cycle 0.1 to 99.9% 0.1 to 99.9% 0.1 to 99.9%
Diode/Continuity Yes/Audible Yes/Audible Yes/Audible
Dimensions/Weight 7.25×3.25×2.25″ (184x83x57 mm)/12.3 oz (349 g)

ORDERING

EX505 (N) True RMS Industrial Multimeter (4000 count)
EX520 (N) True RMS Industrial Multimeter (6000 count)
EX530 (N) True RMS Industrial Multimeter (40,000 count)
TL810 Electrical Test Lead Kit
TL805 Double Injected Test Leads
HG500 Magnetic Hanging Strap

EX505-K Heavy Duty Industrial Multimeter Kit

CAT IV Multimeter and AC Voltage Detector With 8 piece test lead kit

Kit includes EX505 True RMS waterproof (IP67)/drop-proof Multimeter, DV25 Dual Range Non-contact AC Voltage Detector + Flashlight, TL808 8-piece Professional Test Lead Kit, plus professional double-molded test leads, Type K thermocouple bead probe with banana input adaptor, and magnetic hanging strap
Supplied in a soft carrying case that provides protection and organization for the meters and accessories
Dimensions: 9.8x8x2″ (248x203x51 mm); Weight: 1.2 lbs (544 g)

Model EX505: Industrial grade, CAT IV-600 V, 4000 count display, waterproof (IP67), CE/UL listed, drop-proof, rugged multimeter with True RMS functions (see p. 10)
Model DV25: Dual Range Non-Contact Voltage (NCV) Detector (24 to 1000 V AC/100 to 1000 V AC) + Flashlight with Audible/ Visual indication, and double- molded housing CAT IV-1000 V, CE/UL (see p. 28)
Model TL808: 8-Piece Professional Test Lead Kit with CAT III-1000 V rating.

ORDERING (VISIT WWW.EXTECH.COM FOR PRODUCT SPECIFICATIONS) EX505-K Heavy Duty Industrial Multimeter Kit

MM750W Wireless Datalogging CAT IV True RMS Multimeter

EXTECH-EX300-Series-Digital-Multimeters-fig-16

Using the Wireless connectivity feature, Bluetooth® datalogging module, and free app, you can transmit readings right to your iOS® or Android™ devices

Multimeter Features

Wireless DMM function with Bluetooth Datalogging Module transmits readings to iOS and Android devices for remote viewing using the free app
True RMS for accurate AC measurements
Type K Temperature function
Large backlit LCD display
±0.6% basic DCV accuracy
Built-in Non-Contact AC Voltage Detector (NCV)
AC μA function ideal for HVAC flame rod current measurement
External clamp adapter input (1 mV=1 A; 600 A AC/DC max)
MIN/MAX/DIF captures highest & lowest readings and the difference between them
Relative Mode for Capacitance Zero and offset adjustment
Data Hold freezes the reading on the display
Auto Power Off with disable and low battery indicator
CAT IV-600 V, CAT III-1000 V safety category
2 year warranty
Complete with test leads, general purpose Type K bead wire temperature probe, Wireless Datalogging Module (DAT12), 9 V battery, and soft case

Wireless Datalogging Features

Bluetooth Datalogging Module (DAT12) can record over 15k readings and transmit them to a smart device
Free ExView® W-Series App, provides Wireless Data Streaming with real-time remote viewing of readings
Adjustable sample rate and file size support most application needs
Record data directly to phone or tablet
Programmable High/Low audible alarms
Export data in Excel® format
Share data files and snapshots directly from application
Take snapshots of the measurement area with your connected smart phone or tablet camera to capture measurement-related images and to document date/time stamps and measurement data
Using the wireless feature, Bluetooth® Datalogging Module, and the free ExView® W-Series App, you can transmit readings in real-time to your smart devices, store over 15k readings for wireless transfer to generate a report/data analysis, add notes and readings to photos taken from your smart device camera, and use your smart device as a 2nd display for easy viewing or sharing.
Download the Extech ExView™ W-Series App available on App Store or Google Play. NOTE: iOS/ Android device not included.
Apple and the Apple logo are trademarks of Apple Inc., registered in the U.S. and other countries. App Store is a service mark of Apple Inc.
Google Play and the Google Play logo are trademarks of Google LLC.

SPECIFICATIONS RANGE MAX RESOLUTION BASIC ACCURACY

Display Count 6000
Non-Contact Voltage (NCV) >100 V AC
AC Voltage 0.1 mV to 1000 V 0.1 mV ±0.6% of rdg ±3 digits
DC Voltage 0.1 mV to 1000 V 0.1 mV ±0.6% of rdg ±2 digits
AC Current 0.1 μA to 10.00 A 0.1 μA ±0.15% of rdg ±5 digits
DC Current 0.1 μA to 10.00 A 0.1 μA ±0.12% of rdg ±5 digits
AC μA Current 0.1 μA to 6000 μA 0.1 μA ±0.15% of rdg ±5 digits
DC μA Current 0.1 μA to 6000 μA 0.1 μA ±0.12% of rdg ±5 digits
Resistance 0.1 Ω to 60.00 MΩ 0.1 Ω ±0.6% of rdg ±2 digits
Capacitance 9.999 nF to 99.99 mF 0.001 nF ±5% of rdg ±5 digits
Frequency 9.999 Hz to 55.00 MHz 0.001 MHz ±1.5% of rdg ±3 digits
Temperature (Type K) -40 to 1832°F
(-40 to 1000°C)
1° ±(2%+2°F) / ±(2%+2°C)
Duty Cycle 0.1 to 99.9% 0.10% ±1.2% of rdg ±2 digits
Diode Test 3.000 V 0.001 V ±10% of rdg ±5 digits
Continuity Audible
Datalogging (with DAT12) 15,360 data points
Dimensions/Weight 7.4×3.8×2.2″ (188x96x56 mm) / 14.6 oz (415 g) without battery

ORDERING

MM750W (N) Wireless Datalogging CAT IV True RMS Multimeter
TL810 Test Lead Kit
TL803 Standard Test Leads
DAT12 Replacement Bluetooth® Wireless Datalogging Module

MG320/MG325 CAT IV Insulation Tester/True RMS Multimeters

EXTECH-EX300-Series-Digital-Multimeters-fig-18

Combines a portable Insulation Tester with a CAT IV True RMS Multimeter

5 Test Voltage ranges up to 1000 V
Polarization Index (PI) and Dielectric Absorption Ratio measurements (DAR)
Low Resistance measurement with Zero function
Programmable Timer feature sets the duration of test
Comparison Mode allows user to set the Pass/
Fail values for insulation measurements
Step Voltage (10% steps at 50% to 120% of range)
Auto-discharge of voltage test signal
Lock Power-On function for hands-free operation
Manually store/recall up to 99 readings
High voltage and overloa d indication
Data Hold to freeze displayed reading
Auto Power Off and low battery indication
CAT IV-600 V safety category
2-year warranty

Model MG320

Measures Insulation Resistance to 20 GΩ
Backlit 6,000 count display with analog bargraph
Complete with test leads, alligator clip, 6 x AA batteries, and soft case

Model MG325

Measures Insulation Resistance to 200 GΩ
Backlit 10,000 count display with analog bargraph
View the Frequency (45 Hz ~ 400 Hz) of AC Voltage measurements
Remote probe with built-in TEST button allows for quick on-spot testing
LED high voltage and LCD overload indication
Measures Leakage Current, Low Resistance, Capacitance, and Frequency
Complete with remote probe, test leads, alligator clip, 6 x AA batteries, and soft case

SPECIFICATIONS MG320 MG325

Insulation Resistance 50 MΩ, 100 MΩ, 200 MΩ, 500 MΩ,
2000 MΩ, 1 GΩ, 10 GΩ, 20 GΩ
50 MΩ, 100 MΩ, 200 MΩ, 500 MΩ,
2000 MΩ, 1 GΩ, 10 GΩ, 20 GΩ, 50 GΩ,
100 GΩ, 200 GΩ
Insulation Test Voltages 50 V, 100 V, 250 V, 500 V, 1000 V 50 V, 100 V, 250 V, 500 V, 1000 V
AC/DC Voltage 600 V 600 V
Leakage Current — 2000 μA
Resistance 20 kΩ 10 MΩ
Low Resistance — 100 Ω
Capacitance — 500 μF
Frequency — 1 kHZ
Continuity Audible Audible
Dimensions/ Weight 8.9×4.1×2.3″ (225x103x59 mm)/1.5 lbs (0.7 kg)