X-Ray Scanner Maintenance Checklist: Five Minutes per Shift

Short answer

Most X-ray scanner failures are preventable and start with three things: a bent lead curtain, a blocked emergency stop, and a dirty detector. A five-minute check at the start of each shift catches all three, and it costs less than one hour of downtime.

Every shift, five minutes

• Lead curtains — lift each strip; it should fall back flat with no gap. Bent or torn strips raise leakage dose and must be replaced, never taped
• Emergency stops — press each one; the conveyor and the beam must both stop, and the machine must not restart until reset
• Conveyor belt — run it empty; listen for rubbing, check for tracking drift and belt-edge fraying
• Image check — scan a test piece with known wire and step gauges; the image should match the reference strip taped inside the cabinet
• Cooling and ventilation — confirm fans run and filters are not blocked

Weekly

• Clean the curtains and the tunnel interior with a damp cloth — dust on the curtain is a common cause of image fog
• Clean the detector array cover according to the manual; never use solvent on the scintillator
• Check that the emergency-stop labels and warning stickers are legible
• Export and archive the operator and alarm logs

Monthly and annually

Monthly: check the radiation warning lamp, verify the door interlock, inspect cables and rollers. Annually: a third-party radiation survey, a full image-quality verification with the test piece, and a review of the spare-parts stock (curtains, belts, fans).

Three habits that cause most downtime

Pushing bags through the curtain. Forcing an oversized bag bends the strips and opens a gap. Train staff to lift the curtain, not push through it.

Ignoring a drifting belt. A belt that tracks to one side wears the edge and eventually jams under load — usually at the worst possible moment.

Cleaning with the wrong cloth. Abrasive or solvent cleaning fogs the detector cover and permanently degrades image quality.

FAQ

How often should curtains be replaced? When a strip no longer lies flat, or at least once a year on busy lanes. Keep a spare set on site.

Do operators need dosimeters? Recommended for anyone working beside the machine daily; a wearable dosimeter gives a record if a question is ever raised.

What if the image looks washed out? Check curtain condition and detector cover first, then run the test piece. If the test piece is also washed out, call service — do not compensate by turning up the gain.

Related

Wearable radiation dosimeter · Radiation safety explained · After-sales service