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My tester wont charge up

1. Check your charger - The BattPAT requires a 12v charger (some very early models use 9v). Look at the rating plate on the charger body. It should say 12v 500mA or 1A dc. If the voltage is too low, the battery inside the tester won't charge up, even though the green Charging light on the tester may be illuminated.

Not sure where to be looking? Click HERE to view an example of a rating plate. 

2. Is the green charging LED on the tester lit up? If not, check that your charger is correctly plugged in to the tester and into the wall socket at the other end. Make sure the socket is switched on. (This sounds obvious but it's surprising how many people don't check).


3. Check the charger cable for signs of damage. Cables can sometimes start to fray and break close to the strain relief grommet where the cable comes out of the charger body or at the opposite end where the cable enters the power plug.

My tester wont stay charged for long

Connect your tester to the charger and charge it for 30 minutes. The green Charging LED on the tester should flash while charging is taking place. After charging, check the tester again to see how many tests the unit will carry out before giving a Low Battery warning. If the problem persists, please contact our Sales Department to have the tester sent in for checking and battery replacement.

My tester only works if I plug in the charger

This usually means that the battery has failed and needs replacing. It is not advisable to continue operating your tester, powered from the charger, with a failed battery as this can cause the battery to overheat. Please contact our Sales Department to arrange a repair.

My tester wont work at all

Charge the unit for a maximum of 30 minutes. Keep checking the tester at regular intervals to see if the green Charging light comes on. If the battery is very flat, the tester will appear completely dead until the battery voltage is raised to a sufficient level. If the tester still appears dead after 30 minutes on charge, please contact our Sales Department to arrange a repair.

The PASS/FAIL lights flash together

This indicates an internal failure. Depending on the nature of the fault, it may only occur during certain types of test, eg. Class 1 but not Class 2, or may occur on all tests. Please contact our Sales Department to arrange a repair.

BattPAT PAT tester
BattPAT PAT tester

Everything fails Earth Continuity

Sometimes it may appear that every test is failing. This can often be put down to operator error but it's worth doing some basic checks to ensure that the test equipment is working correctly before calling for help.

Check the Earth Test Lead (ETL). Plug the ETL into the test socket on the tester and then put the probe end of the ETL into the Earth socket of the 13A test socket on the tester. Carry out a Class 1 test and check that the Earth Continuity test passes. Ignore the Insulation Resistance reading for the purposes of this test.


If you have an older type of ETL with a fixed crocodile clip on the end, insert a small screwdriver into the Earth socket of the 13A test socket and then attach the crocodile clip to the blade of the screwdriver. You can see an example of this by clicking HERE

BattPAT PAT tester
BattPAT PAT tester

Extension leads / IEC keeps failing Earth Continuity

If the extension lead is failing on Earth Continuity check that the lead length is set correctly on the tester. The default setting is for testing short leads of 1m or less in length.


Press the Long Lead button once to set the limits for leads up to 24m in length.


Press it again to set the limits for leads up to 40m in length. If the lead length is correctly set but the test keeps failing, check the IEC test socket on the tester.


The Earth pin of the socket can sometimes become tarnished or collect dirt due to lack of use or the socket facing upwards. Lightly scrape the outer edges of the Earth pin in the socket with the blade of a flat screwdriver to ensure a clean connection.

BattPAT PAT tester
BattPAT PAT tester

Extension Leads / IEC leads / PAT Adaptors keep failing Polarity

Check the fuse in the mains plug end of the extension lead or IEC lead. A blown fuse will cause a polarity error. Some PAT adaptors deliberately have a broken Live connection so that it's not possible to power a 110v appliance through a 110v to 230v PAT adaptor.


The PAT adaptors supplied by First Stop Safety have all wires connected so that cables will pass polarity tests but the adaptors are clearly marked Not for Mains Use.

Need to see FAQ's for a different tester? Click on the one you want to view.

PAT-IT PAT tester
MemoryPAT PAT tester
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