Megger PAT320 Data Sheet

PAT320

Portable Appliance Tester

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Simple manual or automatic testing

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120 V 60 Hz operation

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User-selectable PASS/FAIL limits

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Fast test times selectable from 1 s

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Ground bond testing at 25 A, 10 A and

200 mA

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Differential, touch and substitute ground

leakage testing

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Tests power cords

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Full color QVGA display

PAT320

Portable Appliance Tester

DESCRIPTION

The PAT320 is a portable bench-top appliance tester for
testing the safety of electrical equipment by performing
a ground bond test, an insulation test, specific ground
leakage tests and operational VA tests to international
standards. It is a fully featured tester designed for customers
who do not need the complexity of a fully configurable
database of clients and results within the tester but require
a complete range of functions to allow automatic or manual
testing of the widest range of electrical equipment.

Simple push-button operation makes the PAT320 fast
and intuitive to use. All regulatory test requirements are
supported: Class I (grounded) and Class II (non-grounded)
equipment, IEC power cords and extension leads. An
automatic mode is available for Class I and Class II testing.
In automatic mode, the tests proceed sequentially through
bond, insulation and operation (VA), indicating a pass or
fail at each test. If a fail occurs, testing is stopped. When
manual testing, each test is preceded by a selection screen
where the test parameters are chosen, such as bond
test current, insulation test voltage or leakage test type.
These diagnostic buttons provide direct access to any test
individually, allowing single tests to be performed following
repair or a suspect result.

APPLICATIONS

The PAT320 is used on the production line for final
verification of electrical safety prior to general sale, or
export to the EU. When exporting to Europe, it is the
European importer’s responsibility to ensure imported
items are safe to European standards. However, any testing
performed at the destination can prove very costly for the
US manufacturer when faults are found.

Testing at the manufacturing plant ensures electrical safety
and provides the opportunity to fix faults and problems
prior to shipping and export. For example, a poor ground

connection would not normally be picked up during
operational testing, and the PAT320 provides an excellent
means of simple safety verification.
The PAT320 is also suitable for use in the repair shop.
Equipment can be checked on receipt in the shop before
the technician powers it up, so ensuring he remains
safe – the equipment could be in repair for any reason.
Additionally, it can (and perhaps should) be checked
prior to despatch to make sure the ground bond remains
good, and the phase connections remain isolated from the
chassis following repair. This maintains full integrity of the
repaired item before the customer receives it back.

PAT320

Portable Appliance Tester

FEATURES AND BENEFITS

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Simple push-button operation allows for direct access to

tests via the keypad; no hidden menu functions.

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User selectable PASS/FAIL limits quickens test and

simplifies results.

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Fast test times selectable from 1 second

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Combined bond and insulation lead thus reducing test

time.

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High and low current bond testing (25 A, 10 A and

200 mA) is selectable either by default or individually
per test

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Instant restart minimizes boot-up time when moving

locations.

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Individual test mode keys allows for performance of any

test by itself.

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Efficient bond transformer with heat dissipation increases

productivity without overheating under heavy use.

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Test lead null enables the use of extended test leads

without affecting the pass/fail limits or manually
accounting for the added lead resistance.

TYPE OF TESTS
Earth Bond and Continuity Tests

To verify the integrity of exposed metalwork on grounded
appliance (Class I). Test current of 25 A is passed via a
remote probe, returning through the ground pin of the
power plug.

Test currents of 10 A and 25 A are available for bond
testing. Where sensitive electronic equipment may be
damaged by high currents, 200 mA is selectable.

Insulation Test

To check equipment conductors are isolated from Earth ­500 V dc. The live and neutral conductors are linked, and
the test voltage is applied between this link and the earth
pin. Where an appliance does not have an earth connection
(Class II), the remote probe is used to contact anywhere on
the external case of the equipment.

Where 500 V may damage sensitive equipment, the
PAT320 provides alternative methods of verifying insulation
integrity. A lower voltage of 250 V dc is selectable, or
alternatives such as a Touch-Current or Substitute Leakage
test can be performed.

Touch Current Test

This test powers the asset at the supply voltage as if it were
in use. The current passing down the earth conductor is
displayed. For Class II, the remote probe is used to contact
any accessible conductive parts.

Differential Leakage Test

Similar to the Touch Current test, during operation
the difference in current between the live and neutral
conductor is measured.

Substitute/Alternative Leakage Test

This test is performed in the same method as the insulation
test, i.e. between the earth conductor and linked live/
neutral. For Class II, the remote probe is used to contact
any accessible conductive parts of the asset.

A 50 Hz a.c. voltage (nominal 40 V) is applied and
the leakage current measured. As this is at 50 Hz, the
impedance of any leakage path is the same as that when
the asset is in operation.

Functional Load Test

Operational test to ensure that the asset works as it should.
Supply voltage is applied to the asset as in use.

Simultaneously, the VA value is displayed as an additional
check that the current drawn by the asset is as expected.

Extension and IEC Power Leads

Standard insulation and earth-bond tests are performed,
with an additional polarity test to ensure that the lead is
wired correctly.

PAT320

Portable Appliance Tester

SPECIFICATIONS

Electrical supply range

120 V a.c. ±10%

Supply measurement

Voltage: ±2% ±1 V
Frequency: ±1% ± 0.1 Hz

Bond test
Open circuit voltage: 9 V a.c. ± 10% ± 0.1 V
10 A bond test current: 10 A rms ±25% ± 0.5 A into 0.1 Ω
25 A bond test current: 25 A rms ± 20% ± 0.5 A into 0.1 Ω
Earth bond resistance accuracy: ±5% ±3 digits (0 to 0.49 Ω)
±5% ±5 digits 0.5 to 1.99 Ω)
Earth bond resistance resolution: 10 mΩ (0 to 1.99 Ω)
Display range: 0 to 1.99 Ω
Bond test nulling: Up to 1.00 Ω
Adjustable test duration: User selectable from 1 sec to 20 sec

Continuity test

Note: The continuity test is a DC test performed automatically
in both positive and negative directions. The average of the two
results is shown.
Continuity test voltage: 4.0 V d.c. -0% +10% (open circuit)
Continuity test current: 200 mA -0% +10% ±5 mA
(into 2 Ω load)
Continuity resistance accuracy: ±5% ±3 digits (0 to 0.49 Ω)
±5% ±5 digits 0.5 to 19.99 Ω)
Continuity resistance resolution: 10 mΩ (1 to 19.99 Ω)
Display range: 0 to 19.99 Ω
Continuity test nulling: up to 9.99 Ω
Test duration: User selectable from 1 sec to 20 sec

Insulation test

Insulation test voltage: 250 V d.c. –0%/+25% open circuit
500 V d.c. –0%/+25% open circuit
(500 V d.c. across 0.5 MΩ)
Insulation resistance accuracy: ±2% ±5 digits (0 to 19.99 MΩ)
±5% ±10 digits (20 to 99.99 MΩ)
Insulation resistance resolution: 0.01 MΩ (0.10 to 99.99 MΩ)
Display range: 0 to 99.99 MΩ
Test duration: User selectable from 1 sec to 1 minute

Substitute leakage test

Test voltage: 40 V a.c. ±10%
Test frequency: Nominal mains 50/60 Hz
Leakage current accuracy: ±5% ±5 digits
Leakage current resolution: 0.01 mA
Display range: 0 to 19.99 mA
Test duration: User selectable from 1 sec to 1 minute
Reading corrected to 120 V + 10% a.c.

Touch current test

Test voltage: Nominal mains 120 V a.c.
Test frequency: Nominal mains 60 Hz
Touch current accuracy: ±5% ±5 digits
Touch current resolution: 0.01 mA
Display range: 0 to 10 mA
Test duration: User selectable from 1 sec to 5 sec
Reading corrected to 120 V + 10% a.c.

Operational test

Test voltage: Nominal mains 120 V a.c.
Accuracy: ±5% ±10 digits (0 to 99 VA)
±5% ±50 digits (100 VA - 999 VA)
±5% ±100 digits (1000 VA - 1800 VA)
Resolution: 1 VA (0 to 1800 VA)
Display range: 0 to 3.99 KVA
Reading corrected to 120 V a.c. Results show load VA

Extension lead test

Test includes insulation and bond tests.
Polarity test voltage: 12 V
Polarity: Lead OK
Live neutral S/C
Live neutral reversed
Live/neutral O/C

Fuse test

Test voltage: 3.3 V
Warning: Audible beep if fuse is OK

Safety

Meets the requirements of IEC 61010-1: 2001
Test leads meet the requirements of IEC 61010-031: 2002
Creepage and clearances for 300 V to Earth Category II

Environmental

Operating temperature: 50º to 122º F (10º to 50º C)
Storage Temperature: -4º to +140º F (-20º to +60º C)
Humidity: 90% RH @ 14º to 86º F (-10º to +30º C)
75% RH @ 86º to 122º F(+30º to +50º C)

Weight

10 lb (4.5 kg)

Dimensions

Instrument only: 7 in. H x 13 in. D x 10 in. W
(175 mm H x 320 mm D x 250 mm W)
With case: 7.5 in. W x 16 in. D x 11 in. W
(190 mm H x 400 mm D x 290 mm W)

Differential leakage current

Test voltage: Nominal mains 120 V a.c.

Test frequency: Nominal mains 60 Hz

Accuracy: ±5% ±5 digits
Resolution: 0.01 mA
Display range: 0 to 19.99 mA
Reading corrected to 120 V +10% a.c.

ORDERING INFORMATION

Item Cat. No.

PAT320-US 1001-366

Included accessories

Continuity/earth bond lead 2000-870

Storage/carry case w/ lead and document pouch 2000-962

Extension lead adaptor (ELA) 120V US 2001-290

UK

Archcliffe Road, Dover
CT17 9EN England
T [phone]
F [phone]
[e-mail]

UNITED STATES

4271 Bronze Way
Dallas, TX 75237-1019 USA
T 1 800 723 2861 (USA only)
T [phone]
F [phone]
[e-mail]

Item Cat. No.

Optional accessories

Plug adaptor IEC C6 - C13 (3way 5A PSU) 2000-551

Roll of 1000 PASS test labels 1000-971

Roll of 1000 FAIL test labels 1001-227

PAT accessory pouch (attaches to side of case) 2001-044

OTHER TECHNICAL SALES OFFICES

Valley Forge USA, College Station
USA, Sydney AUSTRALIA, Täby
SWEDEN, Ontario CANADA, Trappes
FRANCE, Oberursel GERMANY, Aargau
SWITZERLAND, Kingdom of BAHRAIN,
Mumbai INDIA, Johannesburg SOUTH
AFRICA, and Chonburi THAILAND

Registered to ISO 9001:2000 Cert. no. 10006.01

PAT320_DS_enUS_V01

www.megger.com

Megger is a registered trademark

Specifications are subject to change

without notice.