1-16 Performance Verification
3. Configure the Model 2430 ohms function for the 4-wire sense mode as follows:
• Press CONFIG then MEAS Ω. The instrument will display the following:
CONFIG OHMS
SOURCE SENSE-MODE GUARD
©
• Select SENSE-MODE, then press ENTER. The following will be displayed:
SENSE-MODE
2-WIRE 4-WIRE
• Select 4-WIRE, then press ENTER.
• Press EXIT to return to normal display.
4. Press MEAS Ω to select the ohms measurement function, and make sure the source out-
put is turned on.
5. Verify ohms measurement accuracy for each of the resistance values listed in Table 1-7.
For each measurement:
• Set the resistance calibrator output to the nominal resistance or closest available
value.
NOTE It may not be possible to set the resistance calibrator to the specified value. Use the
closest possible setting, and modify reading limits accordingly.
• Select the appropriate ohms measurement range with the RANGE keys.
• Verify that the Model 2430 resistance reading is within the limits given in the table.
6. Repeat the entire procedure using the rear panel INPUT/OUTPUT and 4-WIRE SENSE
jacks. Be sure to select the rear panel jacks with the front panel TERMINALS key.
Table 1-7
Ohms measurement accuracy limits
Model 2430 range Calibrator resistance
1
Model 2430 resistance reading limits
2
(1 year, 18°C to 28°C)
2Ω
20Ω
200Ω
2kΩ
20kΩ
200kΩ
2MΩ
20MΩ
1.9Ω
19Ω
190Ω
1.9kΩ
19kΩ
190kΩ
1.9MΩ
19MΩ
1.89647 to 1.90353Ω
18.9780 to 19.0220Ω
189.818 to 190.182Ω
1.89837 to 1.90163kΩ
18.9856 to 19.0144kΩ
189.837 to 190.163kΩ
1.89761 to 1.90239MΩ
18.9781 to 19.0219MΩ
1. Nominal resistance values.
2. Reading limits based on Model 2430 normal accuracy specifications and nominal resistance values. If actual
resistance values differ from nominal values shown, recalculate reading limits using actual calibrator resistance
values and Model 2430 normal accuracy specifications. See Verification limits earlier in this section for details.
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