Laboratory Testing Protocols & NIST Calibration Traceability

Measurement standards, instrument uncertainty budgets, and unbroken traceability chains per ISO/IEC 17025.

Primary standards recalibrated annually against National Institute of Standards and Technology (NIST) reference materials.

Instrument Description	Model & Serial	NIST Traceable SRM	Uncertainty (k=2)	Last Calibration	Next Due	Calibrating Facility
Yokogawa WT5000 High-Precision Precision Power Analyzer	WT5000-06-M (YK-559102-MET)	NIST Traceable Cal Cert #YOK-884102-AC	±0.03% active power reading at 240V 48A	2026-09-18	2027-09-18	Yokogawa North America Metrology Laboratory
Fluke 1587 FC High-Voltage Insulation & Dielectric Withstand Tester	1587-FC Advanced Insulation Multimeter (FLK-991204-HV)	NIST Certificate #FLK-991204-HV	<1.2 ms trip time variance at 20 mA ground leakage	2026-09-24	2027-09-24	Fluke Calibration Primary Standards Lab

Continuous Thermal Endurance: 8-hour unbroken 48A continuous resistive load testing inside calibrated thermal enclosures monitored with FLIR radiometric thermography.
Dielectric Withstand Isolation: 2,000V AC applied across primary phase busbars and secondary low-voltage pilot circuitry with leakage strictly under 5.0 mA per UL 2594 Section 53.
Pilot Signal Fidelity: 1,000 Hz ±0.5% square wave pilot duty cycle metrology verified via digital storage oscilloscope with jitter under 10 microseconds across -40°C to +85°C.
Contact Resistance Metrology: 4-wire Kelvin micro-ohmmeter testing across SAE J1772 and J3400 primary contacts over 10,000 insertion cycles.