Author Archives: Khanh Nguyen
Megohmmeter Rental: An Insulation Tester Is Not a Hipot
TL;DR: A megohmmeter rental starts with a distinction people get wrong: insulation resistance testing is...
How to Ship Test Equipment for Calibration Without Damaging It
TL;DR: Double-box every instrument, original case inside a second rigid carton with ~5 cm (2...
Torque Wrench Repair: When Calibration Cannot Fix It
TL;DR: Torque wrench repair starts with the fault. Some faults are adjustable drift, which calibration...
How Long Does Calibration Take? Turnaround Times and How to Cut Downtime
TL;DR: Accredited in-lab calibration typically takes about 5 business days at the lab, plus transit...
Network Analyzer Rental: The VNA Is the System, Not the Box
TL;DR: A network analyzer rental is the system, not the box: frequency range and port...
Measurement Uncertainty Explained: TUR, Coverage Factors, CMC and Guard-Banding
TL;DR: Every calibration result is a value plus a doubt. Measurement uncertainty quantifies the doubt;...
Oscilloscope Repair: Faults Worth Fixing, Legacy Models Included
TL;DR: Modern scopes rarely wear out; they fail in a handful of repairable ways. Oscilloscope...
Network Analyzer Repair: Six Faults and What Must Follow
TL;DR: A vector network analyzer rarely fails outright — it drifts, goes unlevelled or loses...
Spectrum Analyzer Repair: Six Faults and What Each One Means
TL;DR: Most spectrum analyzer repair requests are one of six faults: a power supply that...
Digital Multimeter Repair: Six Faults and What Each One Costs You
TL;DR: A multimeter repair is worth doing when the fault is blown input protection, worn...