Keysight Technologies 16197A, Operation And Service Manual

Page: 49 / 73

Keysight16197A Operation and Service Manual 49
User Maintenance
Deterioration Check
Procedure for Acquiring Reference Values for the Electrode Deterioration
Check
Step 1. Clean each electrode and shorting bar using the method described in
“Cleaning” on page 45 .
Step 2. At the actual DUT measurement position, connect an appropriate shorting bar
with the electrode to set the fixture for the SHORT state (See Figure 3-16 on
page 37 ).
Step 3. Measure Rs and Ls according to the Operation and Service Manual for the
measuring instrument.
Step 4. Record the Rs and Ls readings as reference values in the “Check Sheet” on
page 51
Step 5. From the reference values and the user limit values determined in the
preceding section, calculate the upper and lower limit values, and record
them in the Check Sheet.
Electrode Deterioration Check
Measure the impedance of the fixture in the SHORT state to check for electrode
deterioration. Use a shorting bar suited to the size of the actual DUT.
The electrode deterioration check is necessary in the following cases:
— Once a day, and before conducting fixture compensation
Necessary
equipment
— Shorting bars (supplied as accessories)
— Impedance measuring instrument (calibrated at the 7-mm connector end)
Electrode Deterioration Check Procedure
Step 1. Clean each electrode and shoring bar using the method described in
“Cleaning” on page 45 .
Step 2. Perform the measurement, with the measuring instrument set for the same
conditions as mentioned in “Procedure for Acquiring Reference Values for the
Electrode Deterioration Check” on page 49 .
Step 3. Record the Rs and Ls readings, as well as their acceptability, in the “Check
Sheet” on page 51 .
Set the fixture compensation of the measuring instrument to OFF. Set all
other functions to the same states according to “Acquiring Reference
Values”