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Model 3550 LCR Meter Instruction Manual Service Information
Model 3550 Verification Procedure cont’d:
SET UP THE AGILENT 4284A cont’d:
12. Press the soft key labeled CORRECTION.
13. Set the CABLE to 0m.
14. Use the cursor keys to select OPEN. Press the soft key labeled ON.
15. Press the soft key labeled MEAS OPEN.
16. Wait for the open correction to complete.
Note: When the measurement is complete, the unit will indicate “Open Measurement Complete.”
17. Replace the Open Termination with the Short Termination, Model 42091A.
18. Use the cursor keys to select SHORT. Press the soft key labeled ON.
19. Press the soft key labeled MEAS SHORT.
20. Wait for the short correction to complete.
Note: When the measurement is complete, the unit will indicate “Short Measurement Complete.”
C. Measure Standards as follows:
1. Select the first Resistance Standard Model 42033A, connect to the UNKNOWN terminals
of the 4284A.
2. Press TRIGGER, when the measurement changes, record the values for impedance and
phase in the 4284A column.
3. Move the standard to the 3550, and press MAN/EXT. Wait for the reading to display
and press MAN/EXT again. Record the values for impedance and phase in the 3550
column.
4. Repeat for each step in the 4284A table.
5. Calculate the difference in counts (3550) between the units.
6. Verify that each step is within tolerance.
Note: The last few steps require that the leads be changed to incorporate Kelvin Klip leads to
measure the higher value resistance standards. Open and Short corrections must be completed
using the Kelvin Klip leads.
7. Set up the 4285A using the same steps as for the 4284A with the exception of Hi-Pw
mode.
8. Measure and record each standard in the 4285 Table.
9. Calculate the difference in counts (3550) between the units.
10. Verify that each step is within tolerance.
Note: For instances where the 4284A or 4285A does not meet a 4:1 calibration ratio with the
3550, for verification purposes, the allowable number of counts may need to be adjusted to reflect
the added error of the Agilent meters.
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