Author Archives: Khanh Nguyen
USP <41> Minimum Weight: How to Calculate It on an Analytical Balance
USP minimum weight is calculated, not specified: 2s divided by 0.001 from a 10-weighing repeatability...
Does a GPS-Disciplined Oscillator Need Calibration? GPS Lock vs ISO/IEC 17025 Traceability
GPS lock makes a GPSDO accurate, but not traceable. What ISO/IEC 17025 assessors require: the...
Dry-Block vs Liquid Bath: Which Temperature Calibrator Meets Your Uncertainty Target?
Axial inhomogeneity inside the block, not the display, dominates dry-block uncertainty. A worked EURAMET cg-13...
How to Calibrate a Handheld Particle Counter: ISO 17025 Guide
How to Calibrate a Handheld Particle Counter: ISO/IEC 17025 Step-by-Step Airborne particles can easily ruin...
pH Meter Calibration: What Slope and Offset Values Actually Pass
A pH meter calibration passes when the electrode slope falls within roughly 95-102% of the...
Keysight vs Rohde & Schwarz DC Power Supply
Keysight vs Rohde & Schwarz DC Power Supply: Which Brand Is Better? Lab managers and...
Eddy Current Tester Calibration: ISO/IEC 17025 Guide
What Does Eddy Current Tester Calibration Include? ISO/IEC 17025 Guide For non-destructive testing (NDT) professionals,...
ISO 21501-4 Particle Counter Calibration: What Cleanroom Certification Requires
ISO 21501-4 sets the maximum permissible errors for particle counter calibration: 10% size setting, 50%±20%...
How often to calibrate a Source Measure Unit?
Source Measure Unit Calibration: Intervals, Accuracy & Compliance Guide Knowing how often to calibrate a...
DC Power Supply Buying Guide: How to Choose the Right One
DC Power Supply Buying Guide: How to Choose a DC Power Supply Today, testing modern...