Agilent Technologies 16451B, Operation Manual

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A ccurate A djustment in Horizontal P osition
When the Non-contacting Electrode method (Air Gap method) is used,
perform this adjustment after performing the \Rough A djustment to
Make Electrodes P arallel". The procedure is as follows:
1. Clean the electrodes . This is necessary because the capacitance
value is aected by dust. (Refer to \Changing the Guarded/Guard
Electrode ".)
2. P erform an OPEN/SHORT correction. (Refer to Appendix C.)
3. Connect the 16451B to an LCR meter or an impedance analyzer
and select the capacitance measurement function (C
p
) for Circuit
mode . (Refer to \Connecting to the Instrument".)
4. Place the 16451B so that the surface of electrodes is vertical as
shown in Figure 3-27
5. Turn the large knob of the micrometer ccw to make enough
room between the Guarded/Guard electrode and the Unguarded
electrode , and then remove the cover from both electrodes .
6. Turn the small knob of the micrometer cw and adjust it until
the micrometer scale indicates 0.01 mm (10 m) as shown in
Figure 3-28.
If the electrodes make contact before 0.01 mm, turn the three
adjustment screws ccw to move the Unguarded electrode away
from the Guarded/Guard electrode Unguarded electrode till the
scale can be adjusted to 0.01 mm.
Figure 3-29. Horizontal P osition
3-42 Operation