Keithley 6430 Instruction Manual page 449

Sub-femtoamp remote sourcemeter

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Conﬁgure the Model 6430 ohms function for the 2-wire sense and guard modes as

Press CONFIG then MEAS Ω. The instrument will display the following:

SOURCE GUARD

Select GUARD, and then press ENTER. The following will be displayed:

Select CABLE, and then press ENTER.

Press EXIT to return to normal display.

Hazardous voltage may be present on SHIELD when using guarding.

Press MEAS Ω to select the ohms measurement function, and make sure the source out-

put is turned on.

Verify ohms measurement accuracy for each of the resistance values listed in

Table 18-16. For each measurement:

Connect the correct standard resistance directly to the IN/OUT HIGH jack.

Select the appropriate ohms measurement range with the RANGE keys.

Verify that the Model 6430 resistance reading is within the limits given in the

Remote PreAmp 2T Ω and 20T Ω range measurement accuracy limits

Model 6430 range

Standard resistance

Nominal values shown.

Calculated using Model 6430 normal accuracy speciﬁcations and nominal resistance values.

Model 6430 resistance reading limits

Performance Verification

(1 year, 18°-28°C)

0.99168 to 1.00832TΩ

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