Laboratory Equipment Calibration Flashcards
7 cards from real CCIL practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Laboratory Equipment Calibration flashcards as text
What is the primary purpose of a calibration certificate issued after instrument calibration?
Answer: To document traceability to national or international measurement standards
A calibration certificate documents that the instrument's measurements are traceable to recognized national or international standards, ensuring measurement integrity.
Which term describes the closeness of repeated measurements under the same conditions to each other?
Answer: Precision
Precision refers to the repeatability or reproducibility of measurements; accurate instruments are both precise and close to the true value.
In calibration, what does 'measurement uncertainty' quantify?
Answer: The doubt about the validity of a measurement result
Measurement uncertainty is a parameter that characterizes the dispersion of values that could reasonably be attributed to the measurand.
A laboratory balance is found to read 0.05 g high across its entire range. This type of error is called:
Answer: Systematic error
A consistent offset across the measurement range is a systematic error, which can often be corrected through calibration adjustment.
Which organization provides Canada's primary reference standards for physical measurements?
Answer: NRC — National Research Council Canada
The National Research Council Canada (NRC) is Canada's national metrology institute, maintaining primary measurement standards.
When calibrating a pH meter, what is the minimum number of buffer solutions typically required to achieve a two-point calibration?
Answer: 2
A two-point calibration requires exactly two buffer solutions to define slope and offset of the pH electrode response.
What is the significance of calibration 'as-found' data recorded before any adjustment is made?
Answer: It provides a historical record of instrument drift and performance before correction
As-found data captures the instrument's condition prior to adjustment, enabling drift analysis and informing calibration interval decisions.
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