CST Environmental Factors & Scale Performance Flashcards

How does floor vibration from nearby machinery affect a platform scale's weight reading?

Answer: It causes fluctuating weight readings that prevent the indicator from settling on a stable value

Floor vibration introduces dynamic forces on the load cell that cause the weight display to fluctuate continuously, preventing the indicator from achieving a stable, accurate reading.

What device is used to isolate a floor scale from building vibration?

Answer: Vibration isolation pads or anti-vibration mounts placed under the scale feet

Anti-vibration isolation pads or mounts absorb and dampen mechanical vibrations from the floor, preventing them from transferring through the scale structure to the load cells.

What is the purpose of the 'digital filter' or 'vibration filter' setting in a scale indicator?

Answer: To average multiple weight readings over a time period to reduce vibration-induced display fluctuation

A digital filter averages multiple weight readings over a selectable time period, smoothing out vibration-induced fluctuations to provide a stable displayed weight reading.

What mechanical feature protects load cells from permanent damage caused by sudden shock loading or overload impacts?

Answer: Mechanical overload stops or bumpers that limit platform travel and deflection

Mechanical overload stops physically limit how far the scale platform can deflect under load, preventing the load cells from experiencing forces beyond their safe overload rating.

What maintenance procedure most effectively minimizes vibration-related inaccuracy in a floor scale installation?

Answer: Periodically checking and tightening all mounting hardware, check rods, and leveling feet

Loose mounting hardware and leveling feet allow the scale platform to shift and rock under load, introducing mechanical movement noise that mimics vibration and produces inaccurate readings.

Which NTEP certificate of conformance requirement indicates that a scale type has been tested and approved for use in dynamic weighing environments?

Answer: Specific NTEP CoC listing approving the model for the intended dynamic or in-motion weighing application

NTEP Certificates of Conformance are application-specific; a scale intended for dynamic or in-motion weighing must have an NTEP CoC that specifically covers that use, as static approval does not transfer.