1. Isolate the electrical supply and obtain the required permit before opening or working on the luminaire.
2. Inspect the enclosure for cracks, distortion, corrosion, dents or any other damage that could compromise its flameproof integrity.
3. Check flameproof joints/gaps carefully. They must be clean, undamaged and free from paint, dirt, grease or rust.
4. Do not file or machine the flameproof joint surfaces, as this can alter the specified flame path.
5. Check all cover bolts and fasteners for correct type, condition and tightness. Missing or damaged bolts must be replaced with approved ones.
6. Inspect cable glands and entries for correct flameproof type, proper sealing and tightness. Check that unused entries have approved blanking plugs.
7. Check the glass lens/cover for cracks, damage or deterioration and ensure it is properly secured.
8. Inspect seals and gaskets, where applicable, and replace damaged or deteriorated ones with the correct approved type.
9. Check earthing/bonding connections for tightness, cleanliness and continuity.
10. After maintenance, clean the enclosure and reassemble it correctly. Ensure the certification markings and flameproof protection are not compromised, then carry out appropriate functional checks before returning it to service.

Important: Only components and replacement parts approved for the particular flameproof equipment should be used.

1. Obtain the necessary permit and isolate the equipment from all sources of electrical supply before connecting the insulation tester.
2. Ensure the area is gas-free and safe for electrical testing; do not perform the test if an explosive atmosphere may be present.
3. Use an approved intrinsically safe/flameproof test instrument suitable for the hazardous area, or conduct the test outside the hazardous area where practicable.
4. Disconnect sensitive electronic equipment, control circuits, instruments, capacitors and other equipment that could be damaged by the megger test.
5. Ensure the equipment is properly discharged and earthed after testing, because the insulation tester can leave a dangerous residual charge.
6. Keep all connections secure and prevent sparking or exposed conductors during the test; restore all covers, glands and flameproof protection after completion.