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The 4285A precision LCR meter, which has a basic accuracy of 0.1%, was supplied with a 100-ohm resistor as a standard accessory. It is used when calibrating the instrument with extension cables (1 m or 2 m). Does anyone know the specifications on that resistor?

I have a 4285A and the resistor. If the resistor is connected to the front of the instrument, with all corrections off, the instrument reads about 100 ohms, but obviously, there's some variation with frequency.

100 kHz. |Z| = 99.6846 ohms, phase = -0.178 degrees
300 kHz. |Z| = 100.011 ohms, phase = 0.022 degrees

1 MHz. |Z| = 99.9107 ohms, phase = 0.007 degrees

3 MHz. |Z| = 99.9250 ohms, phase = 0.028 degrees

10 MHz. |Z| = 100.062 ohms, phase = 0.036 degrees

30 MHz. |Z| = 101.260 ohmz, phase = -0.128 degrees
?

I have no idea if these figures are to be expected or not.

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Dr David Kirkby Ph.D C.Eng MIET
Kirkby Microwave Ltd
Registered office: Stokes Hall Lodge, Burnham Rd, Althorne, CHELMSFORD, Essex, CM3 6DT, United Kingdom.
Registered in England and Wales as company number 08914892

Tel 01621-680100 / +44 1621-680100