Harrison Laboratories certification facility has calibration services for electronic test equipment:

Up to 6-1/2 digit meters (+/- .002%) - DC Volts, AC Volts, Ohms
Up to 4-1/2 digit meters (+/- 0.02%) - DC Amps, AC Amps

Watt-meter and Frequency Counter Calibration

Operation verification and complete equipment restoration.

Equipment List:
FLUKE 5450A Resistance Standard
FLUKE 5200A AC Calibrator
E.S.I. 240       Resistance Bridge
R.F.L. 5058A  Wattmeter Calibrator
R.F.L. 829G    Calibrator Standard (Used for AC/DC amps)
E.D.C.            DC Voltage Standard

Other Misc. Capacitor and Resistor Standards

Precise Inductance, Capacitance, and Resistance comparisons and values