The Model 5002 Phase Verification Bridge set comprises passive devices that are used in conjunction with Model 5500-2 Phase Standard and an output null indicator such as a true rms voltmeter, an oscilloscope or a wave analyzer to verify that the Phase Standard is continuing to operate within its specified phase accuracy limits. Each bridge has two input terminals for the two output terminals of the Phase Standard and an output terminal to which the null indicator is connected An impedance (a resistor or a capacitor) is connected between each input terminal and the output terminal.