Author Archives: Khanh Nguyen
Process Calibrator Repair: Six Faults That Propagate
TL;DR: A process calibrator fails quietly: the mA source drifts, the battery degrades accuracy as...
12 Red Flags on a Calibration Certificate (Check These Before Filing It)
TL;DR: Twelve things should stop you before an instrument goes back into service: no as-found...
How to Read a Calibration Lab’s Accreditation Scope (Column by Column)
TL;DR: Get the scope from the accreditation body’s directory (ANAB or A2LA), not the lab’s...
Calibration Certificate Levels Compared: NIST-Traceable vs Z540 vs Accredited
TL;DR: Three levels, three different claims. NIST-traceable says the lab used traceable standards, the lab’s...
Calibration Audit Preparation: The 6 Things Auditors Actually Check
TL;DR: Good calibration audit preparation starts from one fact: auditors sample; they don’t read. The...
How to Justify Extending a Calibration Interval to an Auditor
TL;DR: Extending an interval is a decision you have to earn. Auditors accept six things:...
Signal Generator Rental: Specify Modulation Before Frequency
TL;DR: A signal generator rental is specified by modulation type first, not frequency range. An...
How to Set Up a Calibration Program from Scratch (6 Steps)
TL;DR: Six steps, in order: inventory every instrument, classify by criticality, set intervals with a...
Does Used or Rented Test Equipment Need Calibration?
TL;DR: A certificate that arrives in the box documents the seller’s process, not yours, it...
Hardness Tester Repair: Indenter, Force or Test Block?
TL;DR: Most hardness tester repair comes down to a chipped or worn indenter, test force...