Performance Verification 18-31
2. Configure the Model 6430 ohms function for the 2-wire sense and guard modes as
follows:
• Press CONFIG then MEAS Ω. The instrument will display the following:
CONFIG OHMS
SOURCE GUARD
• Select GUARD, and then press ENTER. The following will be displayed:
GUARD
OHMS CABLE
• Select CABLE, and then press ENTER.
• Press EXIT to return to normal display.
WARNING Hazardous voltage may be present on SHIELD when using guarding.
3. Press MEAS Ω to select the ohms measurement function, and make sure the source out-
put is turned on.
4. 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
table.
Table 18-16
Remote PreAmp 2T
Ω
and 20T
Ω
range measurement accuracy limits
Model 6430 range Standard resistance
1
Model 6430 resistance reading limits
2
(1 year, 18°-28°C)
2TΩ
20TΩ
1TΩ
10TΩ
0.99168 to 1.00832TΩ
9.79300 to 10.2070Ω
1
Nominal values shown.
2
Calculated using Model 6430 normal accuracy specifications and nominal resistance values.
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