The PB500 PAT Tester comes complete with everything you need to PAT test your own 240v portable electrical
appliances simply and safely including a Visual Step-by-Step Instructional DVD covering:
• Making a Visual Inspection
• Performing the PAT Tests
• Recording PAT Test Results & Maintenance Records
The PB500 PAT Tester is a simple to use, hand held, battery powered PAT Tester, it can be operated by any competent person who has been given clear instructions.

How to carry out PAT Testing using the PB500 PAT Tester
To switch on the PB500 press the Class 1 and Class 2 buttons simultaneously - you'll hear a beep and the screen will
come alive.

Determine what Class your appliance is?
Class 1
A Class 1 appliance is an earthed appliance, open the plug to determine if the appliance has three wires.

Class 2
A Class 2 appliance has no earth wire, again open the plug to determine that there are only 2 wires.

Double Insulated Appliance
A double insulated appliance must be tested in the same way as a Class 2 appliance and is marked with this double square symbol

Having determined the type of appliance you have, you are now ready to complete a visual inspection
of the appliance.

Making a Visual Inspection
This is a very important part of safety as you can pick up problems before they become a danger to anyone.

Perform the following checks:
• Check the appliance for cracks, loose parts or screws, any outer damage, overheating, burn marks and stains.
• Check the cable for cuts and abrasions.
• Check the plug to make sure that it is not cracked or any of the pins bent.
• Check that the wires are attached to the correct terminals and that no bare wires are visible other than at the
terminals. The terminal screws must be tight.
• Check that the cable grip is holding the outer sheath of the cable tightly and not touching the internal wires.
• Check that the correct fuse is fitted.

It is a good idea to put a fuse label on the plug to ensure that the correct fuse is always used.

If you find faults such as a damaged lead or broken plug the appliance needs to be rectified by a qualified person
before proceeding.

If the appliance passes the visual inspection your appliance is now ready to be PAT tested.

PAT Testing Class 1 Electrical Appliances
Before we can perform the Class 1 test you need to locate an earth point on the appliance to use when carrying
out the PAT test.

Finding an earth point
Supplied with your PB500 PAT Tester is a Quick Earth Finder.

First check that this is working correctly.

Press the square red button - nothing should happen. Now attach the small crocodile clip to the probe and press
the button again. You should get a bleep and the light should come on. The Quick Earth Finder is working correctly.

To find the earth point on the appliance, attach the small crocodile clip on to the earth pin of the appliance's plug.

Then look for the earth point. For example, on an electric kettle touch the element with the probe. Press the button
on the quick earth finder. If it bleeps and the light comes on, you have found an earth point.

It may take perseverance to find the earth point on some appliances, such as a computer, because not all metal
parts are earthed. Touch any metal parts or screws with the probe until you find an earth point. Under no
circumstances take the appliance apart to locate an earth point.

The Class 1 PAT Test
Plug the earth test lead into the round 4mm socket on the end panel of the PB500 PAT Tester

Plug the appliance into the mains socket on the front panel of the PB500 PAT Tester.

Connect the earth test probe or crocodile clip to the earth point you have located on the appliance.

If the appliance has an ON/OFF switch, make sure it is in the ON position.

Press the Class 1 PAT Test button.

The PB500 PAT Tester will now test the continuity of the protective earth. If the measured value is outside of the
acceptable limits a cross is placed next to the Earth Continuity, a FAIL is shown, and the test is stopped.

If the measured value is within acceptable limits a tick is placed next to the Earth Continuity.

The PB500 PAT Tester will now continue with the insulation test. If the power switch is not in the ON position the
PB500 will ask you to check connections – once the power switch is in the ON position the test will automatically
proceed.

If the insulation resistance is lower than the acceptable limit a cross is placed next to Insulation and FAIL is illuminated.

If the insulation resistance is greater than the acceptable limit a tick is placed next to Insulation, and PASS is illuminated.

When this appliance has passed both the Earth Continuity and the Insulation checks it is ready to be labelled and put
back into use.

PAT Testing Class 2 Electrical Appliances
Once the appliance has passed the visual inspection you are ready to proceed with the electrical PAT tests.

Plug the earth test lead into the round 4mm socket on the end panel of the PB500 PAT Tester

For this appliance you need to convert the probe into a clip by removing the protective sleeve and inserting the
probe into the back of the crocodile clip.

Plug the appliance into the mains socket on the front panel of the PB500 PAT Tester.

Connect the earth test probe or crocodile clip to any 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 2 PAT Test button.

If the power switch is not in the ON position the PB500 PAT Tester will ask you to Check Connections.

Switch the appliance ON and the test will automatically proceed, do not press test key again.

If the insulation resistance is lower than the acceptable limit a cross will appear against Insulation and FAIL is
illuminated.

If the insulation resistance is greater than the acceptable limit a tick will appear against Insulation and the PASS is illuminated.

When this appliance has passed the Insulation check, it is ready to be labelled and put back into use.

PAT Testing an IEC Lead
Once the IEC lead has passed the visual inspection, you can proceed with the electrical PAT tests.

Plug the IEC lead under test into the IEC socket on the end panel of the PB500 PAT Tester and plug the IEC plug
into the mains socket on the front panel of the PB500.

Press the Cords Test button.

The PB500 PAT Tester will now test the continuity of the protective earth.

If the measured value is outside the acceptable limits a cross is placed next to the Earth Cont, and FAIL is shown.
The test sequence will be stopped.

If the measured value is within acceptable limits a tick is placed next to the Earth Cont and the PB500 will proceed
with the Insulation test.

If the insulation resistance is lower than the acceptable limit a cross is placed against Insulation and the test
sequence is stopped.

If the insulation resistance is greater that the acceptable limit a tick is placed against Insulation.

The PB500 PAT Tester will now 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 shown next to Cord and a PASS is indicated for the sequence.

This IEC lead should now be labelled.

PAT Testing an Extension Lead
Once the Extension Lead has passed the visual inspection you can proceed with the electrical PAT tests.

Plug the supplied 0.5m yellow IEC lead into the IEC socket on the PB500 PAT Tester and the IEC plug into the mains
outlet socket on the Extension Lead. Plug the mains plug of the Extension Lead into the mains socket on the
front panel of the PB500 PAT Tester.

Press the Cords Test key.

The PB500 PAT Tester will now test the continuity of the protective earth.

If the measured value is outside the acceptable limits a cross is placed against Earth Cont and FAIL is indicated.
The test sequence will be stopped.

If the measured value is within acceptable limits a tick is placed against Earth Cont and the PB500 PAT Tester
will proceed with the Insulation test.

If the insulation resistance is lower than the acceptable limit a cross will appear against Insulation and the test
sequence will be stopped.

If the insulation resistance is greater than the acceptable limit a tick will appear against Insulation.

The PB500 PAT Tester will now 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 against Cord and a PASS is shown for the test sequence.

Each socket of the extension lead will need to be PAT tested.

The extension lead should now be labelled.

PAT Test Results and Maintenance Records
Keeping a register of all appliances and records of PAT tests and maintenance will be helpful to keep track of your maintenance procedures and help determine how often PAT Testing will be required.

The PB500 PAT Tester comes complete with an Appliance Register, PAT Test & Repair Records and PASS/FAIL labels
all in a smart, durable binder - everything you need to keep records of PAT Test results and maintenance procedures
for all your portable electrical appliances.