Seaward PAC3760 PLUS User manual

PAC3760 plus Operating Instructions
1
PAC3760 plus
Operating Instructions
Represented in Australia by:
EMONA Instruments Pty Ltd
78 Parramatta Rd
Camperdown NSW 2050
Tel: [phone]
www.emona.com.au, www.protag.com.au
[email protected]m.au
Part Number 372A550 Revision 2
© 2010 Seaward Electronic Ltd

PAC3760 plus Operating Instructions
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Limited Warranty & Limitation of Liability
SEAWARD Electronic Limited guarantees this product to
be free from defects in material and workmanship under
normal use and service for a period of 1 year. The period
of warranty will be effective at the day of delivery.
(c) Copyright 2010
All rights reserved. Nothing from this edition may be
multiplied, or made public in any form or manner, either
electronically, mechanically, by photocopying, recording,
or in any manner, without prior written consent from
SEAWARD Electronic Limited. This also applies to
accompanying drawings and diagrams.
Due to a policy of continuous development SEAWARD
Electronic Limited reserves the right to alter the
equipment specification and description outlined in this
publication without prior notice and no part of this
publication shall be deemed to be part of any contract for
the equipment unless specifically referred to as an
inclusion within such contract.

PAC3760 plus Operating Instructions
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DECLARATION OF CONFORMITY
As the manufacturer of the apparatus listed, declare under
our sole responsibility that the product:
PAC3760 plus
To which this declaration relates are in conformity with
the relevant clauses of the following standard:
IEC 61010-1:2001
Safety requirements for electrical equipment for
measurement, control, and laboratory use – Part 1:
General requirements.
IEC 61326:2005
Electrical equipment for measurement, control and
laboratory user-EMC Requirements
Performance: The instrument operates within
specification when used under the conditions in the above
standards EMC and Safety Standards.
The product identified above conforms to the
requirements of Council Directive 89/336/EEC and 73/23
EEC.
Seaward Electronic Ltd is registered under BS EN
ISO9001:2000 Certificate No: Q05356.

PAC3760 plus Operating Instructions
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Contents
1
Important Information.........................................5
2 Introduction........................................................7
3 Performing Tests.................................................8
3.1 Testing a Class I Appliance..........................................................8
3.2 Testing a Class I Appliance with Leakage .................................10
3.3 Testing a Class II Appliance......................................................12
3.4 Testing a Class II Appliance with Leakage................................13
3.5 Testing a mains cord..................................................................14
3.6 Testing an extension lead...........................................................16
3.7a Test an EPOD (Powerboard)....................................................16
3.7b Test an EPOD/Extension Lead with MOV and/or RCDs.........17
3.8 Testing 3-Phase equipment........................................................19
3.9 Testing RCD Operating Time....................................................19
4 Troubleshooting................................................21
5 Specification ....................................................22
6 Maintenance.....................................................23
7 Battery Check...................................................23
7.1 Battery Replacement............................................................24
8 Fuse.................................................................25
8.1 Fuse Replacement ................................................................25
9 Service and Calibration .....................................26

PAC3760 plus Operating Instructions
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1 Important Information
These operating instructions are intended for the use of
adequately trained personnel.
The following symbols are used in these operating
instructions and on the PAC3760 plus.
Caution, risk of electric shock.
Indicates instructions must be followed to
avoid danger to persons.
Caution, risk of danger. The operating
instructions must be adhered to in order to
avoid danger.
Caution, risk of electric shock.
Always ensure that the equipment under test
is disconnected from any supply before
connecting to the PAC3760 plus.
It is the responsibility of the user to ensure that the
operation of the unit is correct and that the accuracy of the
measurements are within specification.
Before use, ensure unit is clean and dry; visually inspect
all leads, connectors, and case. Any damage or wear must
be rectified prior to use.
Standard Accessories
Part Number
Carry Case 71G082
Mains Supply Test lead 44B165
Black Continuity/Earth Test Lead
1m 161A024
Australian IEC mains cord 0.5m 325A005
Optional Accessories
Part Number
Leakage test 3-Phase Adaptor 372A950
Insulation test 3-Phase Adaptor 372A951
Isolation Transformer 372A952

PAC3760 plus Operating Instructions
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Figure 1. PAC3760 Front View
Figure 2. PAC3760 End View

PAC3760 plus Operating Instructions
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2 Introduction
The PAC3760 plus is a hand held battery powered unit
suitable for carrying out electrical safety checks on:
•Class I appliances
•Class II appliances
•IEC mains leads
•Extension leads
•10mA RCD
•30mA RCD
•3 Phase appliances when used with a 3-Phase
Adaptor
Overview
With reference to Figures 1 and 2.
1. The LCD
2. Class I Test / Cord Sequence Button
3. Class II Test Sequence Button
4. Leakage Test Sequence Button
5. 10mA RCD Test Button
6. 30mA RCD Test Button
7. 3-Phase Test Sequence Button
8. Test/Mains outlet socket
9. Mains inlet socket
10. IEC Test Connection
11. Earth Continuity Test Terminal
User Interface
The LCD display shows test progress, results for
individual tests and the overall test result for an appliance
or mains cord.
Measurements displayed next to the R
PE
icon indicate the
resistance of the protective earth conductor.
Measurements displayed next to the R
ISO
icon indicate the
resistance measured by the insulation test.
Measurements displayed next to the I
LEAK
icon indicate
the leakage current measured while the unit is powered
from a mains supply.
Tests are initiated using the six push buttons.

PAC3760 plus Operating Instructions
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Power ON/OFF = press and hold the Class I and Class II
test buttons simultaneously, PAC3760 plus will power
on/off when buttons are released.
Note: The unit will automatically switch OFF after
approximately 3 minutes if no keys are pressed.
3 Performing Tests
Press keys Class I and Class II test buttons together to
switch on the unit. When the unit is ready the display will
be as shown below.
3.1 Testing a Class I Appliance
Visually inspect the appliance as per requirements of
AS/NZS3760:2003. If the appliance passes a visual
inspection proceed with the electrical tests.
Plug the earth test lead into the Earth Continuity test
terminal on the PAC3760 plus end panel.
Plug the appliance into the PAC3760 plus front panel test
socket.
Connect the earth test lead to an exposed metal part on the
appliance.
If the Appliance under test has an ON/OFF switch, make
sure it is in the ON position.
Press the Class I test button to start a Class I test sequence.
The PAC3760 plus will now test the continuity of the
protective earth.

PAC3760 plus Operating Instructions
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If the measured value is greater than the 1 ohm pass/fail
threshold, the measured value is displayed and the unit
indicates a fail result as shown below.
If the measured value is less than or equal to the 1 ohm
pass/fail threshold, the measured value is displayed and
the unit indicates a pass result, as shown below.
If the Earth Continuity test has passed then the unit will
proceed with an Insulation test.
Note: The power switch on the appliance under test
must be in the ON position to perform an
insulation test. If no appliance is detected the
PAC3760 plus will display LO LOAD.
If the LO LOAd enunciator is displayed, the load
presented by the appliance may be too small for the
PAC3760 plus to detect. In this case, press the Class I test
button to continue.

PAC3760 plus Operating Instructions
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If the Insulation test measures below the 1Mohm pass/fail
threshold, the measured value is displayed and the unit
indicates a fail.
If the measured value is greater than or equal to the 1
Mohm pass/fail threshold, the measured value is displayed
and the unit indicates a pass result.
3.2 Testing a Class I Appliance with Leakage
Visually inspect the appliance as per requirements of
AS/NZS3760:2003. If the appliance passes a visual
inspection proceed with the electrical tests.
Plug the mains lead into the PAC3760 plus and a mains
supply socket.
When plugging the mains lead into the
PAC3760 plus ensure that the polarity
orientation of the connector is correct. DO NOT
FORCE THE PLUG INTO THE
CONNECTOR, doing so may damage the
PAC3760 plus.
Plug the earth test lead into the Earth Continuity test
terminal on the PAC3760 plus end panel.
Plug the appliance into the PAC3760 plus front panel test
socket.
Connect the earth test probe to an exposed metal part on
the appliance.
If the Appliance under test has an ON/OFF switch, make
sure it is in the ON position.
Press and hold the Leakage button and then the Class I test
button.
The PAC3760 plus will now test the continuity of the
protective earth.
If the measured value is greater than the 1 ohm pass/fail
threshold, the measured value is displayed and the unit
indicates a fail.

PAC3760 plus Operating Instructions
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If the measured value is less than or equal to the 1 ohm
pass/fail threshold, the measured value is displayed and
the unit indicates a pass result.
The unit will proceed with a Leakage test.
Note: The power switch on the appliance under test
must be in the ON position to perform a
leakage test. If no appliance is detected the
PAC3760 plus will display LO LOAD.
The ILEAK icon will flash, press the Leakage button to
start a Leakage test.
The mains supply status is checked and the status is
indicated using the LN, LE and NE enunciators of the
LCD.
LN LE NE Mains status
ON ON OFF Correct
Flash Flash OFF No mains
OFF Flash Flash Earth fault
OFF Flash Flash Live/neutral reversed
If the LO LOAd enunciator is displayed, the load
presented by the appliance may be too small for the
PAC3760 plus to detect. In this case, press the Leakage
button to continue.
Note: If the High Load enunciator is displayed, the
load presented by the appliance may be too
great for the PAC3760 plus and users should
carry out an insulation test.
If the Leakage current is greater than 5mA the FAIL
enunciator is illuminated.
If the Leakage current is less than or equal to 5mA a tick
is placed next to the I
LEAK enunciator.
The PASS enunciator is illuminated.

PAC3760 plus Operating Instructions
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3.3 Testing a Class II Appliance
Visually inspect the appliance as per requirements of
AS/NZS3760:2003. If the appliance passes a visual
inspection proceed with the electrical tests.
Plug the black continuity test lead into the Earth
Continuity test terminal on the PAC3760 plus end panel.
Plug the appliance into the PAC3760 plus front panel test
socket.
Connect the black continuity test lead to an exposed metal
part on the appliance.
If the Appliance under test has an ON/OFF switch, make
sure it is in the ON position.
Press the Class II test button to start a Class II test
sequence.
Note: The power switch on the appliance under test
must be in the ON position to perform an
insulation test. If no appliance is detected the
PAC3760 plus will display LO LOAD.
If the LO LOAd enunciator remains on the display, the
load presented by the appliance may be too small for the
PAC3760 plus to detect. In this case, press the Class II test
button to continue.

PAC3760 plus Operating Instructions
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The unit will now perform an Insulation test.
If the Insulation Resistance is less than 1Mohm the FAIL
enunciator is illuminated.
If the Insulation Resistance is greater than or equal to
1Mohm a tick is placed next to the R
ISO enunciator.
The PASS enunciator is illuminated.
3.4 Testing a Class II Appliance with Leakage
Visually inspect the appliance as per requirements of
AS/NZS3760:2003. If the appliance passes a visual
inspection proceed with the electrical tests.
Plug the mains lead into the PAC3760 plus and a mains
supply socket.
When plugging the mains lead into the
PAC3760 plus ensure that the polarity
orientation of the connector is correct. DO NOT
FORCE THE PLUG INTO THE
CONNECTOR, doing so may damage the
PAC3760 plus.
Plug the black continuity test lead into the Earth
Continuity test terminal on the PAC3760 plus end panel.
Plug the appliance into the PAC3760 plus front panel test
socket.
Connect the black continuity test lead to an exposed metal
part on the appliance.
If the Appliance under test has an ON/OFF switch, make
sure it is in the ON position.

PAC3760 plus Operating Instructions
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Press and hold the Leakage button and then the Class II
test button to perform the Class II test sequence including
a Leakage test.
Note: The power switch on the appliance under must
be in the ON position to perform an leakage
test. If no appliance is detected the PAC3760
plus will display LO LOAD.
The ILEAK icon will flash, press the Leakage button to
start a Leakage test.
The mains supply status is checked and the status is
indicated using the LN, LE and NE enunciators of the
LCD.
LN LE NE Mains status
ON ON OFF Correct
Flash Flash OFF No mains
OFF Flash Flash Earth fault
OFF Flash Flash Live/neutral reversed
If the LO LOAd enunciator is displayed, the load
presented by the appliance may be too small for the
PAC3760 plus to detect. In this case, press the Leakage
button to continue.
Note: If the High Load enunciator is displayed, the
load presented by the appliance may be too
great for the PAC3760 plus and the user should
carry out an Insulation test.
If the Leakage current is greater than 1mA the FAIL
enunciator is illuminated.
If the Leakage current is less than or equal to 1mA a tick
is placed next to the I
LEAK enunciator.
The PASS enunciator is illuminated.
3.5 Testing a mains cord

PAC3760 plus Operating Instructions
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Visually inspect the appliance as per requirements of
AS/NZS3760:2003. If the cord passes a visual inspection
proceed with the electrical tests.
Plug the mains cord under test into the IEC socket and the
front panel mains socket on the PAC3760 plus.
Press the Class I test sequence button.
The PAC3760 plus will first test the continuity of the
protective earth.
If the measured value is greater than 1 ohm a cross is
placed next to the R
PE enunciator, a FAIL is indicated.
If the measured value is less than or equal to 1 ohm a tick
is placed next the R
PE enunciator.
The unit will proceed with the Insulation test.
If the Insulation Resistance is less than 1 Mohm a cross is
placed next to the R ISO enunciator.
If the Insulation Resistance is greater than or equal to 1
Mohm a tick is placed next to the R ISO enunciator.
The unit will proceed with the wiring test, checking the
live and neutral conductors for short or open circuits or
reversed connections.
If the wiring is correct a tick is placed next to the cord
enunciator, the GOOd enunciator is illuminated and a
PASS is indicated for the sequence.
Note: If the tested cord has a wiring fault, one of the
following enunciators will be illuminated in
place of GOOd
OPEn indicates that either the live or neutral
conductor is broken (open circuit) or the plug top fuse
has blown
Shrt indicates that the live and neutral conductors are
shorted together

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CrOS indicates that the live and neutral connections
are crossed (live and neutral conductors reversed)
3.6 Testing an extension lead
Visually inspect the appliance as per requirements of
AS/NZS3760:2003. If the cord passes a visual inspection
proceed with the electrical tests.
Plug the supplied 0.5m IEC lead into the IEC socket and
into a mains outlet on the extension lead. Plug the mains
plug of the extension lead into the front panel mains
socket on the PAC3760 plus.
The extension lead can now be tested in the same manner
as an IEC as described above.
3.7a Test an EPOD (Powerboard)
Visually inspect the appliance as per requirements of
AS/NZS3760. If the cord passes a visual inspection
proceed with the electrical tests. AS/NZS3760 requires an
earth resistance test to be performed to each outlet.
Operators have the choice of carrying out two test
sequences for EPODs:
Procedure A: a complete test sequence is carried out for
every socket (earth, insulation and polarity)
Procedure B:. a complete test sequence is carried out on
the very last socket. Only an earth resistance test is carried
out on the remaining sockets.
Procedure A:
1. Plug powerboard lead into mains outlet socket on the
PAC3760 plus.
2. Plug IEC Lead into the IEC socket on the top of the
PAC3760 plus.
3. Plug the IEC Lead plug into the first socket of the
EPOD.
4. Press Class I test button to perform a complete test
sequence covering earth, insulation and polarity to test the
socket.
5. Repeat sequence on every socket.
Procedure B:
1. Plug powerboard lead into mains outlet socket on the
PAC3760 plus.

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2. Plug IEC Lead into the IEC socket on the top of the
PAC3760 plus.
3. Plug the IEC Lead plug into the first socket of the
EPOD.
Note: First socket is defined as the closest socket to the
power lead.
4. Press the Class I and LKGE buttons simultaneously.
The PAC3760 performs an earth test.
5. Repeat step 4 on every socket until the last socket.
6. At the last socket, press the Class I button to do a
complete test.
Note: Last socket is defined as the socket furthest from
the power lead.
3.7b Test an EPOD/Extension Lead with MOV and/or
RCDs
Visually inspect the appliance as per requirements of
AS/NZS3760. If the cord passes a visual inspection
proceed with the electrical tests. AS/NZS3760 requires an
earth resistance test to be performed to each outlet.
This test sequence uses a leakage test to replace an
insulation test at 500V DC to avoid triggering the MOV
(surge protector) or to apply power to the RCD to allow
circuit connections.
Operators have the choice of carrying out two test
sequences for EPODs with MOV and/or RCD:
Procedure A: a complete test sequence is carried out for
every socket (earth, leakage and polarity)
Procedure B: a complete test sequence is carried out on
the very last socket. Only an earth test is carried out on the
remaining sockets.
Note: For extension leads with RCDs, follow 3.7b
Procedure A and carry out a single socket test.
Procedure A:
1. Plug the mains lead into the PAC3760 plus and a mains
supply socket.

PAC3760 plus Operating Instructions
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2. Plug powerboard lead into mains outlet socket on the
PAC3760 plus.
3. Plug IEC Lead into the IEC socket on the top of the
PAC3760 plus.
4. Plug the IEC Lead plug into the first socket of the
EPOD.
5. Press the CLS1 and LKGE buttons simultaneously. The
PAC3760 will perform an earth test.
6. The PAC3760 will give warning beeps. The user should
press the LKGE button to carry out a leakage and polarity
test on the socket.
7. Repeat sequence on every socket.
Procedure B:
1. Plug the mains lead into the PAC3760 plus and a mains
supply socket.
2. Plug powerboard lead into mains outlet socket on the
PAC3760 plus.
3. Plug IEC Lead into the IEC socket on the top of the
PAC3760 plus.
4. Plug the IEC Lead plug into the first socket of the
EPOD.
Note: First socket is defined as the closest socket to the
power lead.
5. Press the Class I and LKGE buttons simultaneously.
The PAC3760 performs an earth test.
6. The PAC3760 will give warning beeps. Press the Class
II button to stop the test.
7. Repeat steps 5 and 6 on every socket until the last
socket.
8. At the last socket, press the Class I and LKGE buttons
simultaneously. The PAC3760 performs an earth test.
9. The PAC3760 will give warning beeps. Press the
LKGE button to carry out a leakage and polarity test on
the last socket. This completes the sequence for the
powerboard test.
Note: Construction site EPODs usually have 2 banks of
outlet sockets. A complete test sequence must be
carried out on at least one socket outlet on each bank.

PAC3760 plus Operating Instructions
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Note: Powerboards with RCDs may cause the polarity
test to fail. An RCD trip time test will confirm correct
polarity if test is allowed to proceed.
3.8 Testing 3-Phase equipment
The PAC3760 plus is capable of performing electrical
tests on 3-Phase equipment.
In order to perform tests refer to the documentation
supplied with the adaptor.
If the 3-Phase button is pressed while no adaptor is
connected to the PAC 3760 plus then a warning message
PLUG IN 3 PH ADPTR will be displayed.
3.9 Testing RCD Operating Time
The PAC 3760 plus can be used to measure the operating
time of both portable and distribution system RCDs.
When plugging the mains lead into the
PAC3760 plus ensure that the polarity
orientation of the connector is correct. DO NOT
FORCE THE PLUG INTO THE
CONNECTOR, doing so may damage the
PAC3760 plus.
The test configuration depends upon the type under test:
a) Portable RCD
Connect the portable RCD under test to a non RCD
protected mains outlet. If the mains outlet is protected by
an RCD, an isolation transformer will be required.
Connect the PAC 3760 plus mains lead to the mains inlet
socket of the PAC 3760 plus and mains outlet of the RCD.
b) Mains RCD
Connect the PAC 3760 plus mains lead to the mains inlet
socket of the PAC 3760 plus and a mains outlet on the
RCD protect distribution system. This test should be
carried out by a licenced electrical contractor.
To test the RCD operating time, first identify the rated
residual operating current of the RCD under test and press
the appropriate button (10mA or 30mA) to begin the test.

PAC3760 plus Operating Instructions
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The mains supply status is checked and the status is
indicated using the LN, LE and NE enunciators of the
LCD.
LN LE NE Mains status
ON ON OFF Correct
Flash Flash OFF No mains
OFF Flash Flash Earth fault
OFF Flash Flash Live/neutral reversed
If the mains supply status is correct then the test will be
performed. If the mains supply is incorrect, testing is
inhibited.
The operating time of the RCD will be shown on the PAC
3760 display.
For 10mA RCD tests the PAC3760 Plus will indicate a
pass for ≤40ms.
For 30mA RCD tests the PAC3760 Plus will indicate a
pass for ≤300ms.
The PAC3760 Plus will alternate between 0
o
and 180
o
in
between tests. It is essential that two RCD tests are
performed in order to cover both 0
o
and 180
o
conditions.