Equipment Calibration & Diagnostics Flashcards
7 cards from real CMO practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Equipment Calibration & Diagnostics flashcards as text
When performing a zero-point calibration on a load cell, which condition must be met before proceeding?
Answer: The cell must be at operating temperature with no load applied
Zero-point calibration requires the sensor to be at its normal operating temperature with absolutely no load applied so the baseline offset is accurate.
A Mobilyze operator notices the diagnostic display shows a 'Sensor Drift' fault code. What is the most appropriate first step?
Answer: Perform a span calibration to determine if drift is within tolerance
Span calibration confirms whether the drift magnitude exceeds allowable tolerance before deciding on corrective action.
Which tool is used to verify the accuracy of a torque wrench before calibration work begins on Mobilyze equipment?
Answer: Torque tester or torque analyzer
A torque tester or torque analyzer provides a traceable reference measurement to confirm the wrench is applying the correct torque value.
During diagnostic testing, a pressure transducer reads 5% higher than the reference gauge at all test points. This is an example of:
Answer: Offset (bias) error
A consistent error of the same magnitude across all measurement points indicates a fixed offset or bias error, not a linearity problem.
What does the term 'traceability' mean in the context of calibration?
Answer: Linking measurements to a national or international standard through an unbroken chain
Traceability means every calibration can be connected back to a national metrology institute (e.g., NIST) through a documented, unbroken chain of comparisons.
A Mobilyze system's hydraulic pressure gauge is suspected to have hysteresis error. How would you test for this?
Answer: Take readings while increasing pressure and again while decreasing pressure, comparing both sets
Hysteresis is revealed by comparing ascending and descending readings — a difference between the two paths indicates the error.
Which calibration method applies known input values across the full measurement range to generate a correction table?
Answer: Multi-point calibration
Multi-point calibration maps the sensor response at multiple known inputs across its range, allowing a correction curve or table to be established.