{"id":690,"date":"2026-06-18T06:25:05","date_gmt":"2026-06-18T06:25:05","guid":{"rendered":"https:\/\/torr.com.my\/blog\/?p=690"},"modified":"2026-06-25T03:16:24","modified_gmt":"2026-06-25T03:16:24","slug":"bump-test-vs-full-calibration","status":"publish","type":"post","link":"https:\/\/torr.com.my\/blog\/bump-test-vs-full-calibration\/","title":{"rendered":"Bump Test vs Full Calibration"},"content":{"rendered":"\n

What Malaysian Operators Are Getting Wrong<\/strong><\/p>\n\n\n\n

A gas detector passes its weekly bump test. The safety officer logs it as checked. Three months later the same detector fails to alarm during an actual gas release because the sensor had drifted out of calibration, and no one had run a full calibration in over fourteen months.<\/p>\n\n\n\n

This is not a hypothetical. It is a recurring failure mode in industrial facilities across Malaysia, and it comes from a single misunderstanding: that a bump test and a full calibration are interchangeable. They are not.<\/p>\n\n\n\n

What a bump test actually proves and what it doesn\u2019t<\/strong><\/p>\n\n\n\n

A bump test exposes the detector to a known concentration of target gas at a level above the alarm threshold. If the detector alarms, the test passes. That is all it proves: that the detector will alarm when it detects gas above threshold.<\/p>\n\n\n\n

A bump test does not verify accuracy. It does not confirm whether the detector is reading 20 ppm or 40 ppm when the actual concentration is 25 ppm. It does not verify response time. It does not confirm alarm thresholds are correctly set. And it produces no traceable, certified record of measurement performance.<\/p>\n\n\n\n

A detector that passes a bump test every week can still carry significant measurement error that is enough to give a false sense of security when gas concentrations are rising slowly toward a dangerous level.<\/em><\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

A full calibration produces a calibration certificate, which is ideally from an ISO 17025 accredited laboratory capable of documenting the gas concentrations used, before-and-after readings, adjustments made, and the uncertainty of measurement.<\/em><\/p>\n\n\n\n

Bump test vs full calibration and what each covers<\/strong><\/p>\n\n\n\n