Which test device and criteria are used to verify Tank Level Checks, Clean-up Films, and cleaning crossover rollers, and how often is this performed?

• A. Visual inspection & clean-up films; Full tanks, no scratches on films, and CLEAN crossover rollers; DAILY
• B. Densitometer readings; Reproducibility +/-0.1; WEEKLY
• C. pH meter; Range 6-8; DAILY
• D. Thermometer; Temperature stable; MONTHLY

Answer: (A)

Routine QA for film processors relies on direct, observable indicators of the processing path and liquid levels. Using visual inspection together with clean-up films provides a practical, immediate way to verify that Tank Level Checks are met (tanks are full), that Clean-up Films show no film surface damage, and that crossover rollers are clean and free of residue. Clean-up films reveal whether the rollers or tanks are leaving marks or contamination that would affect film transport and development, so together these checks confirm that the physical path is clean and functioning. Performing this daily ensures any drift in tank levels, buildup on rollers, or damage is detected before daily imaging is performed. Other tools like a densitometer, pH meter, or thermometer measure different aspects: density consistency of developed films, chemical acidity, and bath temperature, which are important but do not directly verify the specific cleanliness and transport criteria described here.